JPH10174053A - Index image information correction method and apparatus - Google Patents

Abstract

(57) [Abstract] [Problem] To be recorded on a recording medium on which video information is recorded,
It is possible to correct index image information for easily displaying an index image that is an aid when editing video information, thereby improving the efficiency of editing work. SOLUTION: In a correction process, a mark-in point, a mark-out point, a cue point, an OK /
When there is a change or additional registration of NG, the information such as the time code of the mark-in point in the memory 16 attached to the cassette and the video tape 27 is rewritten, and the image of the mark-in point and the like is compressed by the index creating unit 40. The index picture information (index image information), which is information of a plurality of reduced and arranged images in one frame, is corrected, and the corrected index picture information is recorded on the video tape 27.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a method and an apparatus for correcting index image information, which is used to edit index image information which is helpful when editing video information recorded on a recording medium such as a video tape.

[0002]

2. Description of the Related Art Conventionally, offline editing is one of the methods for editing video information recorded on a recording medium such as a video tape. In offline editing, video information recorded on the original tape at the shooting site is temporarily copied to another recording tape, that is, an editing tape, editing data such as editing points is created on the editing tape, and based on this editing data, This is a method for creating a master tape. In this offline editing, a desired master tape can be created without erroneously erasing or rewriting important recorded information on the original tape.

However, in the offline editing, since the editing operation is performed using the editing tape obtained by copying the original tape, there is a problem that it takes time and effort to copy the information on the original tape to the editing tape. Also, when creating editing data using an editing tape, pre-rolling is indispensable to secure the run-in period of the tape in advance, and it takes time to access the target editing point. However, there is a problem that it takes an extremely long time to create edited data.

[0004] In order to solve the above-mentioned problem, information on an original tape is temporarily copied to a recordable and randomly accessible disk-like recording medium such as a hard disk. There is a method of creating edit data using copy information on a medium. According to this method, the editing point can be accessed in a short time, so that the time required for the editing operation can be reduced.

[0005] However, in this method, in order to record all information on the original tape on the disk-shaped recording medium, a considerable recording capacity is required as the disk-shaped recording medium. There is a problem that it is difficult to realize in practice. Further, even when a disc-shaped recording medium is used, there is a problem that it takes a considerable amount of time to copy from an original tape to a disc-shaped recording medium, as in the case of using an editing tape.

Therefore, as a method of greatly improving the editing work, the present applicant creates a small screen by compressing and reducing the head image (still image) of each scene at the time of shooting. A method has been proposed in which a plurality of index image information arranged in one frame is recorded on a video tape. According to this method, at the time of editing, the index image information is reproduced and displayed, a necessary scene is selected, and only the information of the necessary scene can be transferred from the video tape to the disc-shaped recording medium. Thus, the time required for the editing operation can be significantly reduced.

[0007]

However, if a small screen is always created from an image of the head of each scene, the created small screen may not always be an image useful for editing. There is a problem that the editing work cannot be efficiently performed in some cases.

Further, in order to create a small screen at the time of shooting, special hardware for compressing an image in a VTR (video tape recorder) used together with a video camera at the time of shooting is required. Devices with the ability to create were not common until digital VTRs were shipped for commercial use. Therefore, some devices do not have a function of creating index image information at the time of shooting. In addition, there is a case where it is desired to provide a device that does not have a function of creating index image information at the time of shooting in order to reduce the price. Naturally, a device that does not have a function of creating index image information at the time of shooting cannot record the index image information on the videotape, so that the efficiency of editing work using the index image information has been improved. There is a problem that it cannot be achieved.

Therefore, the applicant assigns information on points which are index points at the time of editing, such as a mark-in point, a mark-out point, and a cue point designated at the time of shooting (at the time of recording a video signal) or at the time of reproduction. A method has been proposed in which the image is recorded on a video tape or a memory in a cassette, and an image such as a mark-in point or a cue point is reproduced based on the index information to create index image information. According to this method, even if index image information is not created at the time of shooting, index image information can be created and recorded on a recording medium later, and editing work using the index image information can be made more efficient. Can be achieved. However, even in this case, the mark-in point or the like designated first at the time of photographing or the like may be later determined to be inappropriate. In such a case, the mark-in point or the like designated first or the like may be used. However, there is a problem that the index image information created based thereon may not always be useful for editing.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to simply display an index image which is recorded on a recording medium on which video information is recorded and which serves as an aid in editing the video information. It is an object of the present invention to provide an index image information correcting device which can correct index image information for performing the editing operation and can improve the efficiency of editing work.

[0011]

According to the present invention, there is provided a method for correcting index image information, comprising the steps of:
An index image information correction procedure for correcting index image information for easily displaying an index image that is an aid when editing video information, and an index image for recording the corrected index image information on a recording medium And an information recording procedure.

According to the present invention, there is provided an index image information correcting apparatus for correcting index image information for easily displaying an index image recorded on a recording medium on which image information is recorded, which is an aid in editing the image information. Index image information correcting means to be performed;
It is provided with index image information recording means for recording the index image information corrected by the index image information correcting means on a recording medium.

According to the index image information correcting method of the present invention or the index image information correcting apparatus of the present invention, the index image information recorded on the recording medium on which the video information is recorded is corrected, and the corrected index image information is recorded. Recorded on the medium.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings.

First, the configuration of the entire system to which the index image information correcting method and apparatus according to the present embodiment are applied will be described with reference to FIG. This system comprises a camera recorder 1 having a digital video camera section and a digital VTR section for recording a video signal obtained by shooting with the digital video camera section as a digital signal on a video tape in a digital video cassette 12.
1, a digital video cassette recorder 13 for reproducing a video signal recorded on a video tape in the digital video cassette 12, and information from the digital video cassette recorder 13 (video signal and index information and additional information described later) And an editing device 14 for performing non-linear editing by using the editing device 14. The digital video camera unit and the digital VTR unit in the camera recorder 11
They may be integrated or separable. The digital video cassette 12 is, for example, 6.3 mm (1 mm).
/ 4 inch) video tape, a built-in memory attached to the cassette using a semiconductor memory in the cassette, and a connection between the memory attached to the cassette and an external circuit, for example, on the back of the cassette. It has a terminal 15. The digital video cassette recorder 13 shown in FIG. 1 corresponds to the index image information correcting device according to the present embodiment.

FIG. 2 shows the camera recorder 1 shown in FIG.
FIG. 2 is a block diagram showing a configuration of a digital VTR unit in FIG. The digital VTR unit 20 has an input terminal 21 for inputting a video signal from a digital video camera unit.
And an output terminal 29 for outputting a video signal, and an input terminal 21
A / D converter 22 for converting the video signal input from the A / D converter into an analog-digital (hereinafter, referred to as A / D), compression encoding of the video signal output from the A / D converter 22, and video tape A video signal compression encoding / decoding unit 23 for decoding (expanding) a signal reproduced from
A D / A converter 28 that converts a signal decoded by the video signal compression encoding / decoding section 23 into a digital-analog (hereinafter, referred to as D / A) and outputs the converted signal to an output terminal 29. ing. Note that the video signal compression encoding / decoding section 23 performs compression encoding processing using discrete cosine transform (hereinafter, referred to as DCT).

The digital VTR unit 20 further adds an error correction code to the signal compressed and coded by the video signal compression coding / decoding unit 23 and corrects an error in the signal reproduced from the video tape. An error correction processing unit 24 that performs processing and outputs the video signal to the video signal compression encoding / decoding unit 23, and is suitable for recording on a video tape a signal to which an error correction code has been added by the error correction processing unit 24. And a channel coding unit 25 that performs a decoding process corresponding to the coding process on the signal reproduced from the video tape and outputs the signal to an error correction processing unit 24. Is recorded on a video tape 27 in the digital video cassette 12 and Video head 2 to be output to the channel coding unit 25 reproduces a signal recorded on the-loop 27
6 is provided. The video head 26 includes a recording head and a reproducing head, and can perform recording and reproduction at the same time.

The digital VTR section 20 further includes a mechanism section 31 for loading the digital video cassette 12 and driving a rotary drum on which the video head 26 is mounted, a display 32 for performing various displays, and a user for performing various operations. Operation terminal 33, a terminal 34 for connection to the terminal 15 connected to the memory 16 attached to the cassette in the digital video cassette 12, a video signal compression encoding / decoding unit 23, an error correction process. Part 24,
It includes a channel coding unit 25, a mechanism unit 31, a display 32, an operation unit 33, and a controller 35 connected to a terminal.

The operation section 33 has a plurality of switches for giving predetermined instructions. In the present embodiment, the switches include a mark-in switch for indicating the start point of the effective area in each scene or take, ie, a mark-in point, and an end point of the effective area in each scene or take, ie, a mark-out point. Markout switch for each scene or take for each scene or take
K (ok) or NG (energy; No goo
d) an OK / NG switch for instructing a take number, a take switch for instructing a take number, a cue switch for instructing a cue point as an index arbitrarily designated by a user, and a mark mode, a cue mode, A mode changeover switch for switching the mark-in / out mode is included. The OK / NG switch switches between an OK instruction state and an NG instruction state each time the switch is pressed. The take number is incremented each time the take switch is pressed. Note that a switch for designating a scene number is not provided, because the scene number is automatically incremented for each scene. Mark mode is
This is a mode that allows the user to arbitrarily designate a mark-in point and a mark-out point using a mark-in switch and a mark-out switch. In the cue mode, the user can set a cue point using a cue switch. The mark-in / out mode is a mode in which the start and end of shooting of each scene are automatically set as a mark-in point and a mark-out point. The operation unit 33 may be provided integrally with the camera / recorder 11, or may be a remote control device. The mark-in point is used as an in-point of a material used for editing.

The controller 35 comprises a CPU (central processing unit), a ROM (read only memory), a RAM (random access memory), an input / output unit, and the like.
By executing a program stored in the ROM using the RAM as a working area, the entire digital VTR unit 20 is controlled based on the time code signal.

FIG. 3 is a block diagram showing the configuration of the digital video cassette recorder 13 shown in FIG. Most of the configuration of the digital video cassette recorder 13 is the same as the configuration of the digital VTR unit 20 shown in FIG. 2, and therefore, the same components as those of the digital VTR unit 20 are denoted by the same reference numerals, and the description thereof will be omitted. Is omitted. The configuration of the digital video cassette recorder 13 differs from the digital VTR unit 20 in that
The index creation unit 40 and the index creation unit 4
A switch 39 for selecting one of the output signal of the A / D converter 22 and the output signal of the A / D converter 22 and outputting the selected signal to the video signal compression / encoding / decoding unit 23. The point is that a function to instruct creation is added. A signal output from the video signal compression encoding / decoding section 23 to the D / A converter 28 is input to the index creation section 40. The index creation unit 40 is controlled by the controller 35, and transmits and receives predetermined data to be described later to and from the video signal compression encoding / decoding unit 23. The index creation unit 40 has an index memory 41 and a memory controller (not shown). The memory controller includes a CPU and controls the index memory 41.

As will be described in detail later, the controller 35 and the index creation unit 40 in FIG. 3 perform the video processing based on the mark-in point, mark-out point, OK / NG, take number, cue point, and scene number information. From the video information recorded on the tape 27, an index picture is selected as an index image to assist in editing, and index picture information for easily displaying the index picture is created. Is recorded on the video tape 27. In the present embodiment, the index picture information is an image in which a plurality of index pictures are respectively compressed and reduced and arranged in a single frame, in other words, a set screen of the compressed and reduced index pictures. Image information.

In this embodiment, when the video information is recorded on the video tape 27 by the digital VTR section 20 shown in FIG. 2, the video information recorded on the video tape 27 is transferred to the digital VTR section 20 or FIG. When the digital video cassette recorder 13 shown in FIG.
The mark-in point, mark-out point, O
K / NG, take number, and cue point can be designated, and the designated information and the scene number information are recorded on the cassette attached memory 16 of the digital video cassette 12 and the video tape 27. ing. Here, the information of the mark-in point, the mark-out point, and the cue point corresponds to the index information in the present invention, and OK / N
The information of G, take number, and scene number corresponds to additional information in the present invention.

Referring to FIG. 4 to FIG. 7, a cassette attached memory 16 of the digital video cassette 12 and a digital VTR unit 20 or a digital video cassette recorder 13 (hereinafter referred to as a digital VTR unit 20) will be described.
Alternatively, the digital video cassette recorder 13
Write 0. ) Will be described.

FIG. 4 shows the structure of the terminal 15 on the digital video cassette 12 side and the terminal 34 on the main body 30 and the main body 3.
3 shows an example of the configuration of the interface on the 0 side. In this example, each of the terminals 15 and 34 is composed of four pins, which include a power supply (VCC) pin, a serial data (S-DATA) pin, and a serial clock (S-
CLOCK) pin and ground (GND) pin, and the corresponding pins are connected to each other. The power and the serial clock are supplied from the main body 30. The ground pin is grounded on the main body 30 side. The serial data pin is used for both input and output. The interface of the main body 30 includes an input buffer 36 for waveform shaping whose input terminal is connected to the serial data pin, and an output buffer 37 for waveform shaping whose output terminal is connected to the serial data pin.
And a serial clock buffer 38 having an output terminal connected to the serial clock pin, and a switch 39 having one end connected to the power supply pin and the other end connected to a power supply circuit in the main body 30. The main body 30 has a switch 3
9 has a control function of turning on and off the power supplied to the digital video cassette 12, and this function functions as a reset of the memory 16 attached to the cassette.

Next, referring to FIG. 5 and FIG.
A communication protocol for writing data from 0 to the cassette attached memory 16 will be described. In the protocol at the time of writing, as shown in FIG. 5, communication starts at the falling edge of the serial data S-DATA when the serial clock S-CLOCK is "H". afterwards,
A 3-byte address is set, and a cycle (serial clock S-CLOCK) indicating writing of data (data write) from the main body 30 to the cassette attached memory 16 is performed.
Is "H", the serial data S-DATA is "L"). Upon receiving the data so far, the cassette attached memory 16 outputs “L” to the serial data S-DATA in the cycle of the next data ACK.
Thereafter, the data is written to the cassette attached memory 16 while handshaking with the data ACK and the data for each byte. The number of data after address setting is of variable length. FIG. 5 shows an example in which data of 2 bytes is written after setting a 3-byte address. For example,
Assuming that the set address is 0100h (h represents a hexadecimal number) and the data are 0AAh and 055h, data 0AAh is written to address 0100h and data 055h is written to address 0101h. The communication ends at the rising edge of the serial data S-DATA when the serial clock S-CLOCK is "H". The data valid period is the “H” period of the serial clock S-CLOCK. Serial data S-DATA for address set and data
FIG. 6 shows the relationship between the clock and the serial clock S-CLOCK. As shown in this figure, eight clocks are required to transfer one byte of address or data.

Next, with reference to FIG. 7, a communication protocol for reading data from the memory 16 attached to the cassette to the main body 30 will be described. The protocol for reading is
Compared with the writing time shown in FIG. 5, after the address setting, instead of the cycle indicating the data write, the cycle indicating the data reading (data reading) from the memory 16 attached to the cassette to the main body 30 (serial clock S-CLOC)
Except that the serial data S-DATA continues to be "H" when K is "H", it is basically the same as the protocol at the time of reading.

Next, data recorded in the memory 16 attached to the cassette will be described with reference to FIGS. First, FIG. 8 shows a structure of a pack which is a unit of data recorded in the memory 16 attached to the cassette. This pack is composed of 5 bytes, and has a pack header 51 of 1 byte and a data section 52 of 4 bytes. The contents of the pack header 51 differ depending on the type of command. In the figure, LSB is the least significant bit, MSB
Represents the most significant bit.

FIG. 9 shows the data format of the memory 16 attached to the cassette. This data format has a main area 53 and an option area 54. Since the contents of the main area 53 are not directly related to the present invention, the description is omitted. Note that FIG.
The format shown in "." Is a standard for a general consumer digital VCR using a 6.3 mm magnetic tape "(" Sp.
educations of Consumer-
5. Use Digital VCRs using
3 mm magnetic tape "(commonly known as Blue Book).

The pack related to the index picture is recorded in the option area 54. In the present embodiment, packs related to index pictures are:
Pack IP for information such as mark-in and mark-out
.. _n1 and _IPn2 (n = 1, 2,...; n increments in accordance with scene or take switching) and a pack CU _n (n = 1, 2,.
n is incremented every time a cue point is specified. )
And packs IP _add1 and IP regarding information for specifying the recording position on the video tape 27 of the index picture information, which is the information of the aggregate picture of the index pictures.
_It specifies _add2 . In this embodiment, the content of the pack header of the pack related to the index picture is FBh.

FIG. 10 shows the outline of the contents of the pack IP _n1 . In the pack IP _n1 , the data section 52
The flag (shown as "OK" in FIG. 10) indicating the upper one byte of the relative value of the markout point, the scene number, and OK / NG is recorded. FIG. 11 schematically shows the contents of the pack IP _n2 . In this pack IP _n2 , the data part 52 stores the lower one byte of the mark-out point relative value and the time code (hour,
Minutes, seconds) are recorded. The time code is position information of the video tape 27 recorded on the video tape 27.

The mark-out point relative value indicates the relative value of the time code from the mark-out point to the mark-in point, and includes the upper one byte in the pack IP _n1 and the pack IP _n2
Are represented by a total of 2 bytes including the lower 1 byte. The maximum value of the scene number is 999, and the maximum value of the take number is 15. The flag indicating OK / NG is
“1” indicates OK, and “0” indicates NG.

[0033] FIG. 12 shows the outline of the contents of the pack CUE _n. In this pack CUE _n, the data unit 5
2, the time code (hour, minute, second, frame) of the cue point is recorded.

FIG. 13 shows an outline of the contents of the pack IP _add1 . In this pack IP _add1 , the data section 5
2, a time code (hour, minute, second, frame) indicating the recording position of the index picture information on the video tape 27 is recorded. FIG. 14 shows Pack I
This shows an outline of the contents of P _add2 . This pack I
In _Padd2 , an absolute track number indicating the recording position of the index picture information on the video tape 27 is recorded in the data section 52 for rescue at the time of duplication of the time code.

In FIGS. 10 to 14, b2,
b1, b0 and 3 bits marked is used as subheader, b2, b1, b0 represents that the pack IP _add1 when 0,0,0, it is packed IP _add2 when 0,0,1 Where 0, 1, 0 indicates a pack IP _n1 , 0, 1, 1 indicates a pack IP _n2 , and 1, 0, 0 indicates a pack CU _n. ing.

FIG. 15 to FIG.
The detailed contents of P _n1 , IP _n2 , CUE _n , IP _add1 , and IP _add2 are shown. In FIGS. 16-18, TENS of FRAMES is the tens digit of the frame, UNITS of FRAMES is the tens digit of the frame, and TENS of SECONDS is 1 of the second.
Zeros value, UNITS of SECONDS is ones place value in seconds, TENSof MINUTES is tenths of a minute
Value of UNITS of MINUTES is 1 /
The value of the order, TENS of HOURS represents the value of the tens place of the hour, and the UNITS of HOURS represents the value of the place of the hour. In FIG. 19, IP indicates a flag indicating whether the index picture information recorded on the video tape 27 is valid or invalid, and “1” indicates valid and 0 indicates invalid.

Next, data recorded on the video tape 27 will be described with reference to FIGS.
FIG. 20 shows a recording pattern on the video tape 27. On videotape 27, one frame is one
It is composed of 0 tracks. Each track 61 has an audio data section 62, a video data section 63, and a subcode section 64. In the drawing, the arrow indicated by the reference numeral 65 indicates the traveling direction of the head, that is, data recording,
Indicates the order of playback.

FIG. 21 shows the structure of data recorded in the audio data section 62 in FIG. The audio data section 62 includes a 77 × 9 byte block composed of 5 × 9 bytes of audio auxiliary data 66 and 72 × 9 bytes of audio data 67.
Data composed by adding an outer code 68 of 77 × 5 bytes and further adding an inner code 69 of 8 × 14 bytes is recorded. In the figure, the arrow indicated by reference numeral 70 indicates the direction of recording and reproduction. For example, audio data having a sampling frequency of 48 kHz and 16 bits is 1 bit.
In the first five tracks of the frame (10 tracks), the first channel is interleaved and recorded, and in the remaining five tracks, the second channel is interleaved and recorded. When the user records the management information in the audio auxiliary data 66, the format is
Two-byte recording is possible.

FIG. 22 shows the structure of data recorded in the video data section 63 in FIG. The video data section 63 includes a 77 × 138-byte block including 77 × (2 + 1) -byte video auxiliary data 71 and 77 × 135-byte video data 72.
Data composed by adding an outer code 73 of 77 × 11 bytes and further adding an inner code 74 of 8 × 149 bytes is recorded. In the figure, the arrow denoted by reference numeral 75 indicates the direction of recording and reproduction. In the video auxiliary data 71, the recordable capacity that is open to the user is 156 bytes in format.

FIG. 23 is a block diagram showing the subcode unit 6 shown in FIG.
4 shows the structure of data recorded. In the subcode section 64, data constituted by adding an inner code 77 of 2 × 12 bytes to a subcode 76 of 5 × 12 bytes is recorded. In the figure, the arrow indicated by reference numeral 78 indicates the direction of recording and reproduction. Subcode section 64
When recording the video / audio management information, the recordable capacity open to the user is 24 bytes (excluding the pack header).

FIG. 24 shows an arrangement of the audio data section 62, the video data section 63 and the subcode section 64 on the video tape 27. In the figure, reference numeral 7
Arrows indicated by 9 indicate recording and reproduction directions. As shown in this figure, on the video tape 27, the audio data section 62, the video data section 63, and the subcode section 64 are arranged in the order of recording and reproduction.

FIGS. 25 and 26 show a video tape 27.
This shows the format of the upper subcode section 64. Here, FIG. 25 shows the data structure of one track in the first five tracks of one frame (10 tracks), and FIG. 26 shows the data structure of one track in the second five tracks. In these figures,
A 5 × 12 byte area described as subcode data is the subcode section 64. 2 on the left side of the subcode section 64
The area of × 12 bytes is an ID code portion in the sync block of the subcode, but is not directly related to the present invention, and thus the description is omitted. FIG. 25 and FIG.
The format shown in FIG. 6 is defined in the above-mentioned standard.

The subcode section 64 in FIGS. 25 and 26
In the 5 × 6 byte area (excluding the pack header, 24 bytes)
Byte) is open to the user. In the present embodiment, packs IP _n1 and IP _n1 related to the index pictures shown in FIGS.
_n2, CUE _n, and so as to record the IP _add1, IP _add2. 25 and 26, FB (I
P _n1 ), FB (IP _n2 ), FB (CUE), FB (IP
_add1), portion marked with FB (IP _add2) is a part to record pack _{IP n1, IP n2, CUE n} , the IP _add1, IP _add2 respectively. The FB (CUE) is recorded when a cue point is designated in the cue mode. The pack related to the index picture is similarly recorded on the first half track side and the second half track side. Therefore, packs of the same content related to the index picture are written ten times (for ten tracks).

FIG. 27 shows the physical arrangement of the subcode data on the video tape 17. One cell in the figure corresponds to one pack. In addition, a blank portion that is not hatched indicates a portion that is open to the user.

Next, an operation related to the creation of index picture information in the system shown in FIG. 1 will be described.

First, the digital VTR unit 2 shown in FIG.
An operation in which a mark-in point, a mark-out point, OK / NG, a take number, and the like are designated by using the operation unit 33 when video information is recorded on the video tape 27 by 0 will be described. The digital VTR unit 20 shown in FIG.
When video information is recorded on the video tape 27 according to the above, a video signal from the digital video camera section is input to the digital VTR section 20 via the input terminal 21. This video signal is converted by the A / D converter 22 into an A / D signal.
It is converted, compressed and encoded by the video signal compression encoding and decoding unit 23, added with an error correction code by the error correction processing unit 24, and encoded by the channel coding unit 25 so as to be suitable for recording on a video tape. Is performed, and the video head 26
7 recorded.

At the time of such recording, when the user selects a mark mode and designates a mark-in point, a mark-out point, OK / NG, and a take number using the operation unit 33, the designated information and The information of the scene number to be automatically incremented is stored in the memory 1 attached to the cassette in the digital video cassette 12 by the controller 35.
6 in the option area 54 and the subcode section 64 of the video tape 27. Recording in the option area 54 of the memory 16 attached to the cassette is performed by the controller 3
5 is performed by transmitting data to the memory 16 attached to the cassette via the terminals 34 and 15, and recording in the subcode section 64 of the video tape 27 is performed by the controller 35 transmitting data to the channel coding section 25. . Mark-in point, mark-out point, OK / N
G, take number and scene number information are stored in packs IP _n1 , IP _n1 , IP _n1 and IP _n shown in FIGS.
Recorded by _n2 . When the mark-in / out mode is selected, the start and end of shooting of each scene are automatically set as a mark-in point and a mark-out point, and the information is recorded on the memory 16 attached to the cassette and the video tape 27. If the queue point is instructed by the operation unit 33, the information is recorded in a cassette attached memory 16 and the video tape 27 by the pack cUE _n shown in FIGS. 12 and 17.

FIG. 28 schematically shows the state of the video tape 27 when a pair of a mark-in point and a mark-out point is specified at two points during the recording of the video information as described above. In this figure, RS is a recording start point, RE is a recording end point, MARK-IN1 is a first mark-in point, MARK-OUT1 is a first mark-out point, M
ARK-IN2 is the second mark-in point, MARK-O
UT2 represents the second mark-out point. For the first recording material between the first mark-in point and the mark-out point and the second recording material between the second mark-in point and the mark-out point, OK / NG, take number and The additional information of the scene number is added.

Up to this point, a case has been described in which a mark-in point or the like is instructed when recording video information. In the present embodiment, the video information recorded on the video tape 27 is transferred to the digital VTR unit 20 or FIG. When the digital video cassette recorder 13 reproduces the data, a mark-in point or the like can be specified by using the operation unit 33. In this case, when instructing the mark-in point or the like, the user may temporarily stop the reproduction and then operate the operation unit 33, or may operate the operation unit 33 while continuing the reproduction. Is also good. The method of recording information such as the mark-in point designated at the time of reproducing the video information in the memory 16 attached to the cassette and the video tape 27 is the same as that at the time of recording the video information. When the video information is reproduced, the signal recorded on the video tape 27 is reproduced by the video head 26, decoded by the channel coding unit 25, subjected to error correction by the error correction processing unit 24, and compressed by the video signal compression. The signal is decoded by the encoding / decoding unit 23, D / A converted by the D / A converter 28, and output from the output terminal 29.

Next, as described above, the video tape 27
Using the digital video cassette 12 in which video information is recorded and information such as a mark-in point is recorded in the cassette attached memory 16 and the video tape 27,
The operation of creating index picture information and recording it on the video tape 27 will be described with reference to FIG. FIG. 29 schematically shows the state of the video tape 27 when index picture information is created. The creation of the index picture information is performed by the digital video cassette recorder 13 shown in FIG. When the user instructs creation of index picture information using the operation unit 33, the controller 35 of the digital video cassette recorder 13 reads out information of all mark-in points, that is, time codes, from the memory 16 attached to the cassette, and reads out the time code. To make the video tape 27 pre-roll to the pre-roll point for the first mark-in point. Thereafter, the controller 35 reproduces the image at the first mark-in point, that is, the index picture 91, and sends a signal corresponding to the index picture 91 decoded by the video signal compression encoding / decoding section 23 to the index creation section 40. Feed and index memory 4
1 is stored. Next, the controller 35 similarly pre-rolls the video tape 27 to the pre-roll point for the second mark-in point, reproduces the image at the mark-in point, that is, the index picture 92, and executes the video signal compression encoding / decoding section. A signal corresponding to the index picture 92 decoded by 23 is sent to the index creation unit 40 and stored in the index memory 41.
The same applies to the third and subsequent mark-in points.

The index creating section 40 sends the signal corresponding to the fetched index picture to the video signal compression encoding / decoding section 23 for compression and reduction. The video signal compression encoding / decoding section 23 performs DCT processing on the transmitted signal in units of blocks of a predetermined size, and sends a DC (direct current) component for each block to the index creation section 40. The index creation unit 40 creates a compressed and reduced index picture using the DC component of each block, and stores the data of the compressed and reduced index picture in the index memory 41.
And stores index picture information, which is information of a set image of the compressed and reduced index pictures. When the index creating unit 40 stores the compressed and reduced index picture data in the index memory 41 by a predetermined capacity allocated for the index picture information, the controller 35 switches the switch 39. The index picture information is output from the index creation section 40 and input to the video signal compression / encoding / decoding section 23 via the switch 39, and the mechanism section 31 is controlled to control a predetermined position of the video tape 27, for example, recording. After the end point RE and after the recording start point RS, a signal can be recorded. The index picture information output from the index creation unit 40 is compression-encoded by the video signal compression encoding / decoding unit 23, and is subjected to predetermined processing in the error correction processing unit 24 and the channel coding unit 25, and 26 records the video tape 27 at a predetermined position.

FIG. 29 shows index picture information 93.
Is recorded after the recording end point RE. FIG. 30 shows an example in which index picture information 93 is recorded after the recording start point RS after index picture information is created in the same manner as in the example of FIG. Note that a black signal is originally recorded for several seconds after the recording start point RS, and even if the index picture information 93 is recorded at this position, the video information is not lost.

When the index picture information 93 is recorded on the video tape 27, the controller 35 _converts the time code of the recording position of the index picture information 93 on the video tape 27 using the packs IP _add1 and IP _add2 into the memory attached to the cassette. 16 optional areas 5
4 and the sub-code portion 64 at a predetermined position on the video tape 27 (for example, the same position as the recording position of the index picture information 93 or a position near the same).

FIG. 31 is an explanatory diagram for describing an example of an image displayed by index picture information. This example is an example of the NTSC system.
A maximum of 32 index pictures after compression and reduction are arranged in one frame of dot × 480 lines. In the figure, the parts with the numbers 1 to 32 represent the index pictures, respectively, and the index pictures are in the order of the numbers 1 to 32 in the figure according to the temporal order (the order of the time code is small). Will be recorded. If the number of index pictures exceeds 32, the index picture information is for a plurality of frames.

Although the case where the image at each mark-in point is unconditionally used as an index picture has been described above, in the present embodiment, OK as the additional information is used.
Based on the information of / NG, the take number, and the scene number, an image that satisfies a desired condition among the images at each mark-in point can be selected as an index picture. For example, selecting only images of NG scenes,
It is possible to select only an image of a scene, or to select only an image having a designated scene number or take number.

As described above, in this embodiment, even if the index picture information is not created at the time of shooting, the index information (the mark-in point and the mark-out point) recorded on the memory 16 attached to the cassette and the video tape 27 will be described later. ,
Based on the cue point information) and the additional information (OK / NG, take number, scene number information), index picture information can be created and recorded on the video tape 27. Therefore, even when shooting is performed using a device that does not have the function of creating index picture information at the time of shooting, the index picture information is used by creating index picture information and recording it on the video tape 27 later. It is possible to improve the efficiency of editing work (improvement of cueing of a desired position on the video tape 27, introduction of an overview of video information recorded on the video tape 27, and the like).

Further, according to the present embodiment, an image which meets a desired condition can be selected as an index picture based on the index information and the additional information, whereby
The editing work can be made more efficient.

In this embodiment, the index information and the additional information are recorded on both the cassette attached memory 16 and the video tape 27.
Even if the photographing is performed using the digital video cassette 12 which does not have the index picture information, the index picture information can be created and recorded on the video tape 27 later.

Next, with reference to the flowcharts of FIGS. 32 and 33, the operation of the correction processing for correcting the index information, the additional information and the index picture information recorded on the memory 16 attached to the cassette and the video tape 27 will be described. This correction process is performed by the digital video cassette recorder 13 shown in FIG. The user operates the operation unit 33
32, the controller 35 of the digital video cassette recorder 13 issues an instruction to execute the correction process.
And the correction processing shown in FIG. 33 is executed. When the correction process is performed, the controller 35 has already read the index information and the additional information recorded in the memory 16 attached to the cassette. This read is
For example, it is automatically performed when the digital video cassette 12 is mounted on the digital video cassette recorder 13.

In the correction processing, first, the controller 35
Determines whether the mark-in switch has been pressed (step S101). When the mark-in switch is pressed (Y), the controller 35 temporarily stores the time code of the mark-in point (step S102). If the mark-in switch has not been pressed (step S1
01; N), the controller 35 determines whether or not the mark-out switch has been pressed (step S10).
3). When the mark-out switch is pressed (Y), the controller 35 temporarily stores the time code of the mark-out point (step S104). When the time code of the mark-in point or the mark-out point is temporarily stored (step S102, step S104), the controller 35 compares the time code of the paired mark-in point and mark-out point (step S105), and marks out. It is determined whether or not the time code at the mark-in point is smaller than the time code at the point (step S106).
If the time code at the mark-in point is smaller (Y), the mark-in point and the mark-out point are registered (step S107). Note that the paired mark-in point and mark-out point refer to the mark-in point and mark-out point in the same scene and take. Further, in the correction processing shown in FIGS. 32 and 33, only the mark-in point or the mark-out point can be corrected. If only the mark-in point or the mark-out point is to be corrected, step S10
One point compared in 5 is a point before correction.

When the mark-out switch is not pressed (step S103; N), when the time code of the mark-in point is not smaller (step S106; N), and the mark-in point and the mark-out point are registered (step S103).
If step 107) is completed, the controller 35 determines whether or not the cue switch has been pressed (step S).
108). When the cue switch is pressed (Y), the controller 35 temporarily stores the time code of the cue point (step S109), and determines whether or not the cue point is different from the already designated cue point (step S109). Step S1
10). If it is a different cue point (step S11
0; Y), the controller 35 registers a different cue point (step S111).

When the cue switch is not pressed (step S108; N), when the cue point is not a different cue point (step S110; N), and when registration of a different cue point is completed (step S111), the controller 35 It is determined whether the OK / NG switch has been pressed (step S112). The controller 35 is OK
If the / NG switch is pressed (Y), the designated OK or NG is registered (step S113). When the OK / NG switch is not pressed (step S112; N) and when the registration of OK or NG is completed (step S113), the controller 35 determines whether or not the registration has been performed (step S114). If the registration has been made (Y), the controller 35 sets the pack I in the cassette attached memory 16 and the video tape 27.
Rewrite P _n1 , IP _n2 , and CUE _n (step S11)
5).

Next, the controller 35 determines whether or not there is a function for creating index picture information (step S116). If that function is available (Y),
The controller 35 corrects the index picture information (Step S117). When there is no function of creating index picture information (step S116; N) and correction of index picture information (step S11)
When 7) is completed, the controller 35 determines whether or not the correction instruction has been completed (step S118). For example, the user instructs the end of the correction instruction by operating the operation unit 33. If it is the end of the correction instruction (Y), the controller 35 determines whether or not there is a function of creating index picture information (step S119). If there is such a function (Y), the controller 35 writes the corrected index picture information on the video tape 27, and also writes the packs IP _add1 and IP _add2 on the cassette attached memory 16 and the video tape 27 (step S120). Then, the correction processing ends. If there is no function of creating index picture information (step S119; N), the correction process is terminated. In addition, when there is no registration (step S114; N) and when it is not the end of the correction instruction (step S118;
N) returns to step S101.

The correction processing shown in FIGS. 32 and 33 includes a change and addition of a mark-in point and the like. The operation unit 3 determines whether the mode for changing the mark-in point or the like or the additional mode is used.
3 can be switched by a mode switch provided in the apparatus.

Here, the change of the mark-in point will be specifically described with reference to FIG. FIG. 34 shows a video tape 27 in which the first mark-in point is changed with respect to the video tape 27 in which the pair of the mark-in point and the mark-out point is specified at two places as in the example of FIG. It is a state schematically shown. In this figure, RS is the recording start point, RE is the recording end point, MARK-IN1 is the first mark-in point before change, and MARK-OUT1 is 1
The second mark-out point, MARK-IN2, represents the second mark-in point, and MARK-OUT2 represents the second mark-out point. The first recording material between the first mark-in point and the mark-out point, the second mark-in point,
OK / NG, take number, and scene number additional information are added to the second recording material between the mark-out points. Before the change of the mark-in point, the index picture information includes the index picture 91 of the first mark-in point and the index picture 92 of the second mark-in point before the change.

To change the first mark-in point, the user plays back the video tape 27, selects a new first mark-in point while watching the playback screen, and operates the operation unit 33.
Press the mark-in switch. If the point in time when the mark-in switch is pressed belongs to the same scene and take as the first mark-in point before the change, the time code when the mark-in switch is pressed is changed to the new first mark-in point. It is temporarily stored as the time code of the point (step S102). In FIG. 34, this new first mark-in point is represented as MARK-IN1N. Then, the time code of the new first mark-in point MARK-IN1N is changed to the first mark-out point MARK-O.
If it is smaller than the time code of UT1 (step S1
06; Y), a new first mark-in point MARK-I
N1N is registered (step S107), and 1 before the change is stored in the cassette attached memory 16 and the video tape 27.
The data of the first mark-in point MARK-IN1 is rewritten with new data of the first mark-in point MARK-IN1N (step S115).

FIG. 35 shows a change in data in the memory 16 attached to the cassette when the first mark-in point is changed as described above.
(B) shows the state after the change. As shown in this figure, in the option area in the memory 16 attached to the cassette, the pack IP ₁₁ (MARK-IN) in which the data of the first mark-in point MARK-IN1 before the change is recorded.
_{1), IP 12 (MARK-} IN1) is packed IP ₁₁ (MARK-IN1N the data of a new first mark-in point MARK-IN1N is recorded), IP ₁₂ (MAR
K-IN1N).

As shown in FIG. 34, when a new first mark-in point MARK-IN1N is registered, the index picture 91N is taken into the index creating section 40, and the index picture information is also corrected. . The modification of the index picture information will be described with reference to FIG. FIG. 36A shows 1
It shows the state of the index picture information in the index memory 41 before the change of the mark-in point. In the figure, reference numeral 201 denotes an index picture after compression and reduction of the first mark-in point MARK-IN1 before the change. The arrow in the figure is
This indicates the recording order of index pictures.

The index picture information is stored in the index memory 41 before the correction processing is executed. This method may be a method of reading the index picture information 93 recorded on the video tape 27 and storing it in the index memory 41 or a method of reading each index from the video tape 27 based on the index information recorded in the memory 16 attached to the cassette. A method of taking in a picture, creating index picture information, and storing it in the index memory 41 may be used.

New first mark-in point MARK-I
When N1N is registered, as shown in FIG.
The first mark-in point MA before the change is stored in the index memory 41 by the index creation unit 40.
Index picture 2 after compression and reduction of RK-IN1
01 is the new first mark-in point MARK-IN1
The index picture 201N after the compression and reduction of N is rewritten.

Here, the correspondence between the index picture information and the data in the cassette attached memory 16 in the case of the examples of FIGS. 34 to 36 will be described with reference to FIG. FIG. 37A shows the index picture information, and FIG. 37B shows the data in the memory 16 attached to the cassette. As shown in FIG. 37A, in the index picture information, the mark-in points MARK-IN1N and MARK-I are arranged in the order of the numbers 1 to 32 in the figure.
The compressed and reduced index pictures of N2, MARK-IN3,... Are recorded, and as shown in FIG. 37B, packs IP _n1 ,
The pairs of IP _n2 are stored in the cassette attached memory 16 in order from the head address of the sub area in accordance with the numerical order in FIG. Therefore, the pack IP _n1 , IP
The address of the cassette attached memory 16 where the pair of _n2 is recorded and the position of each index picture in the index picture information correspond one-to-one.

Next, referring to FIG. 38, the mark-in point,
The addition of the mark-out point will be specifically described. FIG.
Reference numeral 8 denotes a video tape when a new mark-in point and a mark-out point are added to the video tape 27 in which a pair of a mark-in point and a mark-out point is specified in two places as in the example of FIG. 27 schematically shows the state of No. 27.

To add a mark-in point and a mark-out point, the user plays back the video tape 27, selects a new mark-in point MARK-IN3 while watching the playback screen, and Press the in switch, and
A new mark-out point MARK-OUT3 is selected, and the mark-out switch of the operation unit 33 is pressed. A scene and a take having the same mark-in point and mark-out point (in the example of FIG. 38, the second mark-in point MARK-IN
2, the same scene and take as the mark-out point MARK-OUT2) and the mark-in point MARK-IN.
3 time code is the mark-out point MARK-OUT
If the time code is smaller than the time code No. 3, a new third mark-in point MARK-IN3, a mark-out point MARK
-OUT3 is registered and additionally recorded in the memory 16 attached to the cassette and the video tape 27. In this example, the time code at the third mark-in point MARK-IN3 is smaller than the time code at the second mark-in point MARK-IN2.

FIG. 39 shows the third mark-in point MARK-IN3 and mark-out point MARK-OU as described above.
FIG. 9A illustrates a change in data in the cassette attached memory 16 when T3 is added. FIG.
(B) shows the state after the change. As shown in this figure, in the option area in the memory 16 attached to the cassette, the data after the second mark-in point MARK-IN2 is re-recorded in the area whose address is increased by two packs, and a new data is recorded. 3rd mark-in point MARK
A pair of -IN3 pack of _{IP 21 (MARK-IN3),} I
P ₂₂ (MARK-IN3) is the first mark-in point M
ARK-IN1 pack pair IP ₁₁ (MARK-IN
1), IP ₁₂ (MARK-IN1) and a pack of data of the second mark-in point MARK-IN2 paired with IP ₃₁ (M
ARK-IN2) and IP ₃₂ (MARK-IN2).

As shown in FIG. 38, when a new third mark-in point MARK-IN2 is registered, the index picture 203 is taken into the index creating section 40, and the index picture information is also corrected. . The modification of the index picture information will be described with reference to FIG. FIG. 40A shows the state of index picture information in the index memory 41 before the third mark-in point and mark-out point are added. In FIG.
12 is the first mark-in point MARK-IN
This represents an index picture after compression and reduction of the first and second mark-in points MARK-IN2.

A new third mark-in point MARK-I
When N3 is registered, as shown in FIG. 40B, the second mark-in point MARK-IN is stored in the index memory 41 by the index creation unit 40.
2 are rearranged one by one in the recording order after the index picture 212 after compression and reduction, and the index picture 213 after compression and reduction of the new third mark-in point MARK-IN3 is 1 The index picture 211 after compression and reduction of the second mark-in point MARK-IN1 and the second mark-in point MARK-IN1
2 is arranged between the compressed and reduced index pictures 212.

In the index memory 41, the position of each index picture in the index picture information and the address in the index memory 41 correspond one-to-one. Therefore, the above-described rearrangement of the index pictures can be easily executed by changing the storage position (address) of each index picture in the index memory 41.

Here, the correspondence between the index picture information and the data in the cassette attached memory 16 in the case of the examples of FIGS. 38 to 40 will be described with reference to FIG. FIG. 41A shows index picture information, and FIG. 41B shows data in the memory 16 attached to the cassette. As shown in FIG. 41A, in the index picture information, the mark-in points MARK-IN1, MARK-IN
, MARK-IN2,... Are recorded, and, as shown in FIG. 41B, packs IP _n1 , IP _n2 corresponding to each index picture are recorded. The pairs are stored in the cassette attached memory 16 in order from the head address of the sub area in accordance with the numerical order in FIG.

Next, writing of the modified index picture information on the video tape 27 will be described.
Corrected index picture information to videotape 2
The method of writing on the video tape 7 is a method of recording on the video tape 27 separately from the index picture information already recorded on the video tape 27, and a method of overwriting a portion of the video tape 27 where the index picture information is already recorded. There is a way.

First, a method of recording the corrected index picture information on the video tape 27 separately from the index picture information already recorded on the video tape 27 will be described with reference to FIG. FIG.
As described with reference to FIG. 38, a video tape 2 in which a pair of a mark-in point and a mark-out point is specified in two places.
7 schematically shows the state of the video tape 27 when new third mark-in and mark-out points are added. In this example, before the recording end point RE on the video tape 27, the index picture information 93 before correction is recorded, and after that, the index picture information 94 after correction is recorded.
In this case, since the index picture information 93 and 94 before and after the correction are recorded on the video tape 27, the user can recognize the difference before and after the correction.

Referring to FIG. 43, as described above, in addition to the index picture information 93 before the correction, the index picture information 93 after the correction is recorded on the video tape 27 in the memory 16 attached to the cassette. A description will be given of the data correction in the above. FIG. 43A shows the cassette attached memory 16 before correction, and FIG.
Represents the state of. As shown in this figure, the pack IP _add1 and IP _add2 indicating the recording position of the index picture information 93 before correction on the video tape 27 are invalidated. That is, the IP bit in the pack IP _add2 shown in FIG. 19 is set to “0” (invalid). Then, packs IP _add1 N, IP indicating the recording position of the modified index picture information 94 on the video tape 27 are _{newly added} .
_add2 N is recorded in the memory 16 attached to the cassette. The pack IP _{add2 in} FIG. _43A and the pack IP _{add2 in} FIG.
In the pack IP _add2 N in the above, the IP bit is “1”.
(Valid).

In the example shown in FIG. 43, the packs IP _n1 , IP _n1
n2 corresponds to the index picture information 94 after the correction, and the index picture information 93 before the correction.
Therefore, information such as a time code corresponding to each index picture included in the index picture information 93 before correction cannot be obtained. However, when the storage capacity of the cassette attached memory 16 is large, the packs IP _n1 and IP _n2 corresponding to the index picture information 93 before correction are also used as they are in the cassette attached memory 1.
6, information such as a time code corresponding to each index picture contained in the index picture information 93 before correction can be obtained.

Next, referring to FIGS. 44 and 45, the corrected index picture information is
A method of overwriting a portion on which index picture information is already recorded on FIG. 7 will be described. FIG.
In the video tape 27 on which the pre-correction index picture information 93 is recorded after the recording end point RE in the same manner as in the example of FIG. 42, No. 4 records the post-correction index picture information 94 and the pre-correction index picture information 93. This shows a state where the portion overwritten is overwritten.

FIG. 45 (a) shows the state of the cassette attached memory 16 before correction, and FIG. 45 (b) shows the state of the cassette attached memory 16 after correction. As shown in this figure, when overwriting the corrected index picture information 94, the packs IP _add1 and IP _add2 indicating the recording position of the uncorrected index picture information 93 on the video tape 27 are _replaced by the corrected IP _{picture 1.} Rewrite the index picture information 94 into packs IP _add1 N and IP _add2 N indicating the recording position on the video tape 27.

Referring to FIGS. 46 and 47, a method of storing index picture information before correction in index memory 41 before correction processing is performed in order to correct index picture information. Will be described. As described above, the method of storing the index picture information before correction in the index memory 41 includes a method of reading the index picture information recorded on the video tape 27 and storing the index picture information in the index memory 41, and a method of attaching the cassette. There is a method in which each index picture is fetched from the video tape 27 based on the index information recorded in the memory 16 to create index picture information and stored in the index memory 41. The operation of each of these methods will be described below.

FIG. 46 is a flowchart showing the operation of reading the index picture information recorded on the video tape 27 and storing it in the index memory 41. This operation is performed by the digital video cassette recorder 13 shown in FIG. 3, and is executed first when the user instructs to execute the correction processing shown in FIGS. Is done. In the operation shown in FIG.
First, the controller 35 reads the pack I indicating the recording position of the index picture information on the video tape 27 from the memory 16 attached to the cassette or the video tape 27.
P _add1 and IP _add2 are read (step S131). Next, the controller 35 performs cueing of the video tape 27 with respect to the recording position of the index picture information (setting of the reproduction start position) (step S132). Specifically, the cue is performed to a pre-roll point that is a predetermined time (for example, 5 seconds) before the recording position of the index picture information. Next, the controller 35 starts the reproduction of the video tape 27 (step S133). Next, the controller 35 waits until the video tape 27 reaches the playback position of the designated point, that is, the recording position of the index picture information (step S134). The data is written in the memory for use 41 (step S135), and the operation ends.

As already described with reference to FIG. 37 and the like, the pack 16 corresponding to each index picture in the index picture information is stored in the memory 16 attached to the cassette.
A pair of P _n1 and IP _n2 is stored in accordance with the recording order of each index picture in the index picture information. Each index picture in the index picture information and a pack IP _n1 and I in the cassette attached memory 16 are stored.
A correspondence with the pair of P _n2 is taken.

The operation shown in FIG. 46 has the advantage that the speed of storing the index picture information in the index memory 41 is high (the time is short), but the index information compressed and recorded on the video tape 27 is obtained. The index picture information is read in, corrected using the index picture information, and the corrected index picture information is compressed again and recorded on the video tape 27, so that there is a problem that the image quality is deteriorated.

FIG. 47 is a flowchart showing the operation of taking in each index picture from the video tape 27 based on the index information recorded in the cassette attached memory 16 to create index picture information and storing it in the index memory 41. This operation is performed by the digital video cassette recorder 13 shown in FIG.
It is executed first when the user gives an instruction to execute the correction processing shown in FIGS. 32 and 33 using the operation unit 33.
In the operation shown in FIG. 47, first, the controller 35
From the memory 16 attached to the cassette or the video tape 27,
Read all pack _{IP n1, IP n2, CUE n} ( step S141). Next, the controller 35 rewinds the video tape 27 to the beginning (step S142). Next, the controller 35 starts the reproduction of the video tape 27 (step S143). Next, the controller 3
5 waits until the video tape 27 reaches the reproduction position of the designated point, that is, the recording position of the index picture based on each index information (step S144), and when the video tape 27 reaches the recording position of the index picture, the image data of the reproduced index picture is The data is written into the index memory 41 (step S145). Next, the controller 35
Determines whether the capture of the image data of all index pictures has been completed (step S146). If the processing has not been completed (N), the process returns to step S144 to fetch image data of the next index picture. Then, when the image data of all the index pictures has been captured (step S146; Y), the controller 35 ends the operation. The captured image data of each index picture is stored in the index creation unit 40 and the video signal compression encoding / decoding unit 23.
Compressed and reduced by the index memory 4
1 is stored at a predetermined storage position (address),
Index picture information is created.

In the case of the index picture information created by the operation shown in FIG. 37 and stored in the index memory 41, each index picture in the index picture information and the packs IP _n1 and IP _n2 in the cassette attached memory 16 are also stored. Correspondence with the pair is taken.

In the operation shown in FIG. 37, the speed of storing the index picture information in the index memory 41 is slow (the time is long). There is an advantage that the image quality is not deteriorated as compared with the index picture information.

As described above, according to the present embodiment, the index information, the additional information, and the index picture information recorded on the video tape 27 and the cassette attached memory 16 can be corrected later. Before editing, rough editing can be performed, and the editing work can be made more efficient.

The present invention is not limited to the above embodiment. For example, in the embodiment, the index information and the additional information are recorded on both the cassette attached memory 16 and the video tape 27. Recording may be performed only on one side. Further, in the embodiment, the time code of the recording position of the index picture information on the video tape 27 is also recorded on both the memory 16 attached to the cassette and the video tape 27. Is also good.

In the embodiment, the index information and the additional information recorded on the cassette attached memory 16 are used when the index picture information is created. However, the index information and the additional information recorded on the video tape 27 are used. It may be used.

In the embodiment, an example in which the image at the mark-in point is used as an index picture has been described. However, the present invention is not limited to this. For example, the image at the cue point may be used as an index picture when the cue mode is selected. .

The digital VTR in the camera / recorder 11 is configured as shown in FIG. 3 so that the digital VTR can create, record, and correct index information, additional information, and index picture information. May be.

[0097]

As described above, the method of correcting index image information according to any one of claims 1 to 5 or claim 6.
According to the index image information correcting apparatus described in any one of (1) to (10), the index image information recorded on the recording medium on which the video information is recorded is corrected, and the corrected index image information is recorded on the recording medium. As a result, the index image information recorded on the recording medium on which the video information is recorded can be corrected later, and the editing work can be made more efficient.

Further, according to the index image information correcting method according to the second aspect or the index image correcting apparatus according to the seventh aspect, the index image information before correction recorded on the recording medium is fetched.
Since the index image information is corrected using the index image information before the correction, the index image information correcting method according to claim 1 or the effect of the index image correcting apparatus according to claim 6 is added. This has the effect that the index image information is quickly taken in.

According to the index image information correcting method according to the third aspect or the index image correcting apparatus according to the eighth aspect, the index image information is corrected based on the index information recorded in at least one of the recording medium and the memory attached to the recording medium. Thus, the index image information before correction is created, and the index image information is corrected using the index image information. Therefore, the effect of the index image information correction method according to claim 1 or the index image correction device according to claim 6 is obtained. In addition to
There is an effect that the image quality of the index image information does not deteriorate before and after the correction.

According to the index image information correcting method of the fourth aspect or the index image correcting apparatus of the ninth aspect, the corrected index image information is recorded on a recording medium separately from the index image information before the correction. Therefore, in addition to the effect of the index image information correcting method according to claim 1 or the index image correcting device according to claim 6, it is possible to compare the index image information before and after the correction.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a configuration of an entire system to which a method and an apparatus for correcting index image information according to an embodiment of the present invention are applied;

FIG. 2 is a block diagram showing a configuration of a digital VTR unit in the camera recorder shown in FIG.

FIG. 3 is a block diagram showing a configuration of the digital video cassette recorder shown in FIG.

FIG. 4 is an explanatory diagram showing a means for communicating with a cassette attached memory in the digital video cassette shown in FIG. 1;

FIG. 5 is an explanatory diagram for describing a protocol at the time of writing data to a memory attached to a cassette.

FIG. 6 is an explanatory diagram showing a relationship between serial data and a serial clock in FIG. 5;

FIG. 7 is an explanatory diagram for describing a protocol when reading data from a memory attached to the cassette.

FIG. 8 is an explanatory diagram showing a structure of a pack which is a unit of data recorded in a memory attached to a cassette.

FIG. 9 is an explanatory diagram showing a data format of a memory attached to a cassette.

FIG. 10 is an explanatory diagram schematically showing the contents of a pack related to an index picture used in the index image information correcting device according to one embodiment of the present invention.

FIG. 11 is an explanatory diagram schematically showing the contents of a pack related to an index picture used in the index image information correcting device according to one embodiment of the present invention.

FIG. 12 is an explanatory diagram schematically showing the contents of a pack related to an index picture used in the index image information correcting device according to one embodiment of the present invention.

FIG. 13 is an explanatory diagram schematically showing the contents of a pack related to an index picture used in the index image information correcting device according to one embodiment of the present invention.

FIG. 14 is an explanatory diagram schematically showing the contents of a pack related to an index picture used in the index image information correcting device according to one embodiment of the present invention.

FIG. 15 is an explanatory diagram showing detailed contents of the pack shown in FIG. 10;

FIG. 16 is an explanatory diagram showing the detailed contents of the pack shown in FIG. 11;

FIG. 17 is an explanatory diagram showing detailed contents of the pack shown in FIG. 12;

FIG. 18 is an explanatory diagram showing the detailed contents of the pack shown in FIG. 13;

FIG. 19 is an explanatory diagram showing the detailed contents of the pack shown in FIG. 14;

20 is an explanatory diagram showing a recording pattern on a video tape in the digital video cassette shown in FIG.

FIG. 21 is an explanatory diagram showing a structure of data recorded in an audio data section in FIG. 20;

FIG. 22 is an explanatory diagram showing a structure of data recorded in a video data section in FIG.

FIG. 23 is an explanatory diagram showing the structure of data recorded in a subcode section in FIG.

FIG. 24 is an explanatory diagram showing an arrangement of an audio data section, a video data section, and a subcode section on a video tape.

FIG. 25 is an explanatory diagram showing a format of a subcode section on a video tape.

FIG. 26 is an explanatory diagram showing a format of a subcode section on a video tape.

FIG. 27 is an explanatory diagram showing a physical arrangement of subcode data on a video tape.

FIG. 28 is an explanatory diagram showing a state of a video tape when a mark-in point and a mark-out point are designated when recording video information in one embodiment of the present invention.

FIG. 29 is an explanatory diagram showing an example of a state of a video tape at the time of creating index picture information according to an embodiment of the present invention.

FIG. 30 is an explanatory diagram showing another example of the state of the video tape when index picture information is created in one embodiment of the present invention.

FIG. 31 is an explanatory diagram for describing an example of an image displayed by index picture information according to an embodiment of the present invention.

FIG. 32 is a flowchart showing an operation of a process of correcting index information, additional information, and index picture information according to an embodiment of the present invention.

FIG. 33 is a flowchart showing an operation of a process of correcting index information, additional information, and index picture information according to an embodiment of the present invention.

FIG. 34 is an explanatory diagram for describing a change in a mark-in point in one embodiment of the present invention.

FIG. 35 is an explanatory diagram showing a change in data in the memory attached to the cassette when the mark-in point shown in FIG. 34 is changed.

FIG. 36 is an explanatory diagram for describing correction of index picture information in the case of changing the mark-in point shown in FIG. 34.

FIG. 37 is an explanatory diagram for explaining a correspondence relationship between index picture information and data in a memory attached to a cassette in the case of the examples of FIGS. 34 to 36;

FIG. 38 is an explanatory diagram for describing addition of a mark-in point and a mark-out point in one embodiment of the present invention.

FIG. 39 is an explanatory diagram showing a change in data in the memory attached to the cassette when the mark-in point and the mark-out point shown in FIG. 38 are added.

40 is an explanatory diagram for describing correction of index picture information in the case of adding a mark-in point and a mark-out point shown in FIG. 38.

FIG. 41 is an explanatory diagram for explaining a correspondence relationship between index picture information and data in a memory attached to a cassette in the case of the examples of FIGS. 38 to 40;

FIG. 42 is an explanatory diagram for describing a method of recording the modified index picture information on a video tape separately from the already recorded index picture information in one embodiment of the present invention.

FIG. 43 is an explanatory diagram for describing correction of data on the memory attached to the cassette in the case of the example of FIG. 42;

FIG. 44 is an explanatory diagram for describing a method for overwriting the index picture information corrected in one embodiment of the present invention on a portion where the index picture information is already recorded on the video tape.

FIG. 45 is an explanatory diagram for describing correction of data on the memory attached to the cassette in the case of the example of FIG. 44;

FIG. 46 is a flowchart showing an operation of reading index picture information recorded on a video tape and storing it in an index memory according to an embodiment of the present invention.

FIG. 47 is a flowchart showing an operation of taking in each index picture from a video tape based on index information recorded in a cassette attached memory, creating index picture information, and storing the index picture information in an index memory according to an embodiment of the present invention; is there.

[Explanation of symbols]

11 camera recorder, 12 digital video cassette, 13 digital video cassette recorder, 14
... Editing device, 16 ... Memory attached to cassette, 20 ... Digital VTR unit, 27 ... Video tape, 33 ... Operation unit, 3
5: controller, 40: index creation unit, 41:
Index memory

Claims (10)

[Claims] 1. An index image information correcting procedure for correcting index image information for easily displaying an index image recorded on a recording medium on which video information is recorded and serving as an aid when editing the video information, and An index image information recording procedure for recording the corrected index image information on the recording medium. 2. The method according to claim 1, wherein the index image information correcting step includes reading the index image information before correction recorded on the recording medium, and correcting the index image information using the index image information before correction. 2. The method according to claim 1, wherein the index image information is corrected. 3. The method according to claim 1, wherein the step of correcting the index image information is performed based on index information recorded in at least one of the recording medium and a memory attached to the recording medium and serving as an index when editing video information. 2. The index image information correcting method according to claim 1, wherein the previous index image information is created, and the index image information is corrected using the index image information before the correction. 4. The index image information correction according to claim 1, wherein the index image information recording procedure records the index image information after the correction on the recording medium separately from the index image information before the correction. Method. 5. The index image information recording procedure according to claim 1, wherein the modified index image information is overwritten on the recording medium at a position where the unmodified index image information was recorded. Index image information correction method. 6. Index image information correcting means for correcting index image information for easily displaying an index image recorded on a recording medium on which video information is recorded, which is an aid when editing the video information, and An index image information correction device, comprising: index image information recording means for recording index image information corrected by the index image information correction means on the recording medium. 7. The index image information correcting means fetches index image information before correction recorded on the recording medium and corrects the index image information using the index image information before correction. The index image information correction device according to claim 6. 8. The index image information correcting means is configured to correct the index image information based on index information recorded in at least one of the recording medium and a memory attached to the recording medium and serving as an index when editing video information. 7. The index image information correcting apparatus according to claim 6, wherein the index image information before the correction is created, and the index image information is corrected using the index image information before the correction. 9. The index image information correction device according to claim 6, wherein said index image information recording means records the index image information after the correction on the recording medium separately from the index image information before the correction. apparatus. 10. The method according to claim 6, wherein the index image information recording unit overwrites the modified index image information on a portion of the recording medium where the unmodified index image information was recorded. Index image information correction device.