JP2000209549A - Image processing apparatus and method, and image recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reproduce the moving image data which are compressed by an MPEG2 system at an optional part and also to perform the frame feeding of the image data by producing the data to show the positions of plural unit data on the digital moving image data. SOLUTION: The data are produced to show the positions of plural unit data on the digital moving image data. In this system, a microcomputer system 1 reads the moving images out of a storage medium 2 before its reproducing operation and writes an index in the medium 2 to show the position of a prescribed static image constructing the moving image data based on those read-out images. In a reproducing mode, the system 1 reads out the moving image data based on the stored index and outputs these image data to a decoder 11 of a moving image reproducer 3 as a video stream via a serial bus, etc. The decoder 11 expands and decodes the compressed moving image data and outputs the prescribed moving image data to an image signal generator 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing apparatus and method, and more particularly, to an image processing apparatus and method for processing digital moving image data including a data string in which a plurality of unit data are arranged in chronological order. And an image recording medium.

[0002]

2. Description of the Related Art Moving image data is composed of time-series continuous still image data. MPEG (Moving Picture Experts Group) 2, one of the compression methods for moving image data
Compresses each still image data to reduce the size of the moving image data.

A conventional apparatus for reproducing moving image data compressed by the MPEG2 system has operations such as reproduction from the beginning of the moving image data, stop during reproduction, and frame forward and backward from the stop position. it can.

[0004]

The size of still image data constituting moving image data compressed by the MPEG2 system is not uniform. For this reason, the MPEG stored on the storage medium
Even if an attempt is made to access an arbitrary image of the moving image data compressed by the method 2, the data amount per reproduction time is not constant, and the position of the target image cannot be obtained by calculation. Therefore, moving image data is sequentially read from the top, and a time stamp attached to each still image data is read to search for an arbitrary image. For this reason, it takes a longer time to search for an arbitrary image from the compressed moving image data than in the case of uncompressed moving image data, and moving image data compressed by the MPEG2 method is required. A normal device for reproduction cannot perform operations such as reproduction from an arbitrary position and frame advance.

The present invention has been made in view of such a situation, and an object of the present invention is to make it possible to perform operations such as reproduction and frame advance of moving image data compressed by the MPEG2 method from an arbitrary position. Aim.

[0006]

According to a first aspect of the present invention, there is provided an image processing apparatus comprising position data creating means for creating data indicating positions of a plurality of unit data of digital moving image data.

According to a fourth aspect of the present invention, there is provided an image processing apparatus comprising: a position data reading means for reading data indicating a position of a plurality of unit data of digital moving image data; and a digital moving image based on the data read by the position data reading means. Image reading control means for controlling data reading.

According to a fifth aspect of the present invention, there is provided an image processing method, comprising: a position data reading step for reading data indicating a position of a plurality of unit data of digital moving image data; and a digital moving image based on the data read in the position data reading step. And an image reading control step of controlling data reading.

According to a sixth aspect of the present invention, in the image recording medium, data indicating positions of a plurality of unit data of the digital moving image data is recorded.

In the image processing apparatus according to the first aspect, data indicating positions of a plurality of unit data of digital moving image data is created.

[0011] In the image processing apparatus according to the fourth aspect and the image processing method according to the fifth aspect, data indicating the positions of a plurality of unit data of the digital moving image data is read, and digital data is read based on the read data. Controls reading of moving image data.

In the image recording medium according to the present invention, data indicating positions of a plurality of unit data of the digital moving image data is recorded.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below. In order to clarify the correspondence between each means of the invention described in the claims and the following embodiments, each means is described. When the features of the present invention are described by adding the corresponding embodiment (however, an example) in parentheses after the parentheses, the result is as follows. However, of course, this description does not mean that each means is limited to those described.

That is, the image processing apparatus according to the first aspect of the present invention provides position data creating means for creating data indicating the positions of a plurality of unit data of digital moving image data (for example, step S17, step S19, or step S19 in FIG. 7). Step S21) is provided.

According to a fourth aspect of the present invention, there is provided an image processing apparatus comprising: position data reading means for reading data indicating positions of a plurality of unit data of digital moving image data (for example, step S34 or step S39 in FIG. 8); An image reading control unit (for example, step S35 or step S40 in FIG. 8) for controlling reading of digital moving image data based on the data read by the reading unit.

An image recording medium according to a sixth aspect is characterized in that data (index 51 in FIG. 5) indicating positions of a plurality of unit data of digital moving image data is recorded.

FIG. 1 is a block diagram showing the configuration of an embodiment of a moving picture reproduction system according to the present invention. The microcomputer system 1 reads out the multiplexed data of the compressed moving image data and the compressed audio data stored in the storage medium 2 such as the mounted optical disk, and based on the moving image data. An index 51 indicating a position of a predetermined still image constituting moving image data, which will be described later with reference to FIG. Next, the microcomputer system 1 reads the data in which the moving image data and the audio data are multiplexed from the storage medium 2 based on the index 51, and converts the video stream 41 including the moving image data to be described later with reference to FIG. The data is transferred to the moving image reproducing device 3 and an audio frame including audio data is supplied to the audio reproducing device 4. The moving image reproducing device 3
The video signal is reproduced based on the video stream 41 composed of the compressed moving image data and output to a monitor (not shown). The audio reproduction device 4 reproduces an audio signal based on an audio frame composed of compressed audio data, and outputs the audio signal to a speaker (not shown).

The operation of reproducing moving image data of the moving image reproducing system will be described in more detail with reference to FIG.
Before the reproduction operation, the microcomputer system 1
Reads the moving image data stored in the storage medium 2 and writes an index 51 indicating the position of a predetermined still image constituting the moving image data into the storage medium 2 based on the read moving image data. At the time of reproduction, the microcomputer system 1
Reads video data based on the index 51 stored in the storage medium 2 and outputs the video data as a video stream 41 to the decoder 11 of the video playback device 3 via a serial bus or the like. . Video playback device 3
The decoder 11 expands and decodes the compressed moving image data included in the video stream 41 and outputs predetermined moving image data to the image signal generator 12. The image signal generator 12 converts the input moving image data into NTSC (Nationa
l Converts to a video signal of a predetermined system such as Television Systems Committee) and outputs it.

Next, the hardware configuration of the microcomputer system 1 will be described with reference to FIG. CPU
(Central processing unit) 21 includes various application programs and a basic operating system (OS).
m) is actually executed. ROM (read-only memory) 22
Generally stores basically fixed data of programs used by the CPU 21 and parameters for calculation. RAM (random-access memory) 23 is a CPU
The program used in the execution of step 21 and parameters that change as appropriate in the execution are stored. These are interconnected by a bus 32.

The keyboard 25 is operated by the user when inputting various commands to the CPU 21. Mouse 2
Reference numeral 6 is operated by the user to designate or select a point on the screen of a CRT (cathode ray tube) 27. The CRT 27 displays various information as text or images. HDD (hard disk drive) 28 and FDD (flo
The ppy disk drive 29 drives a hard disk or a floppy disk, and records or reproduces a program or information executed by the CPU 21 on the hard disk or the floppy disk. The communication board 30 is a device for connecting to the moving picture reproducing device 3, and specifically, is a SCSI (Small Computer System).
Interface) board or IEEE (Institute of Electrical
and Electronics Engineers) 1394 serial bus board etc. The optical disk driver 31 has an optical disk as an example of the storage medium 2 mounted thereon, stores the index 51 in the mounted optical disk, or reads out moving image data or the index 51 from the mounted optical disk. The keyboard 25 to the optical disk driver 31 are connected to the interface 24,
The interface 24 is connected to the CPU 21 via the bus 32.

Next, the MPEG2 stored in the storage medium 2
The structure of moving image data according to the above method will be described with reference to FIG. The encoded moving image data of MPEG2 has a hierarchical structure, and a sequence (Sequence) layer, G
OP layer, Picture layer, Slice layer, Macro Block layer, and Block
Consists of layers. Each layer from the sequence layer to the slice layer is provided with a unique 32-bit start code, which distinguishes each layer and serves as an error recovery point.

Generally, the video stream 41 of the sequence layer is coded data of one entire video program, and the video stream 41 is composed of one or more GOs.
P42. GOP42 indicates a set of one or more images. The GOP 42 has an independently encoded I
The picture 43 is arranged as the first encoded image, and thereafter, a predetermined number of B pictures 44 and P pictures 45 are arranged. B picture 44 or P picture 45
Is composed of difference data with respect to the I picture 43, and the moving picture reproducing apparatus 3 cannot reproduce an image only with the B picture 44 or the P picture 45. Therefore, MPEG
The I picture 43 is used as a point at which data is randomly accessed. For example, if GOP42 is 10
In the case of a structure of 30 pictures, a random access point (I picture) exists every 0.33 seconds in a video of 30 frames per second.

The picture 46 corresponds to each screen and is divided into one or more slices. The slice 47 corresponds to a horizontally long band-like area in the screen. The macro block 48 is
It is composed of a predetermined number of luminance blocks and a predetermined number of color difference blocks spatially corresponding to the luminance blocks. Block 49 stores DCT (Discrete Cosine Transform) encoded data. The block 49 is composed of 8 pixels × 8 lines of a luminance signal or a color difference signal, and includes a DCT and an IDC.
T (Inverse Discrete Cosine Transform) is performed in this unit.

Next, the relationship between the index 51 and moving image data will be described with reference to FIG. Index 51 is
In the order of time when moving image data is output as a video stream, the position of the sequence header located at the beginning of the video stream 41, the positions of GOP42-1 to GOP42-N, and GOP42-1 to GO
It is a random access point included in P42-N
The position of the I picture 43 is determined by a predetermined data length (for example, 8
(For example, bytes).

FIG. 6 is a diagram showing the format of the index 51. The column of the position on the index in FIG.
Specifically, it is an address indicating the number of the byte from the head of the index 51 (data is not stored). The contents column includes the start position of the sequence header, the end position of the sequence header, and GOP42-1 to GOP42-1.
42-N, GOP42-1 to GOP42-
The start position of the I picture 43 in N, and the GOP 42
Data indicating the end position of the I picture 43 in -1 to GOP42-N is stored. Index 51
However, the reason why the start position of the sequence header and the end position of the sequence header are stored is that the format of the moving image data can be quickly read. GOP42
The start positions of -1 to GOP42-N are stored in the index 51 so that a GOP header including data relating to the GOP can be quickly read.

The index 51 is the I picture 4
3 can reproduce an image only with the data of the I picture 43 without referring to another image. By storing the start position and the end position of the I picture 43,
When the video playback system reads the moving image data,
The picture 43 is configured to be quickly read.

For example, the start position of the sequence header, the end position of the sequence header, and the GOP 42-1
To GOP42-N, GOP42-1 to GOP42-G
Start position of I picture 43 in OP42-N, and I picture 4 in GOP42-1 to GOP42-N
When one piece of data at the end position of No. 3 is stored in 8 bytes, the data of the twentieth GOP 42 from the beginning is stored.
The offset of the start position of the I picture is ((GOP number −1) × (data of one GOP) + (offset of sequence header) + (offset of start position of I picture)) × (of one data Bytes)
It can be calculated as ((20-1) × 3 + 2 + 1) × 8 bytes = 480 bytes. Thus, the 8-byte data stored at the 480th byte from the beginning of the index 51 includes the start position of the I picture 43 of the twentieth GOP 42 from the beginning of the image data stored in the storage medium 2. Is stored. The moving image playback system uses the 8-byte data stored in the 480th byte from the beginning of the index 51 to store the data in the storage medium 2.
20th G from the beginning of the image data stored in
The reading of the I picture 43 of the OP 42 can be started.

The offset of the end position of the I picture of the twentieth GOP 42 from the top is ((GOP number−
From (1) × (data of one GOP) + (offset of sequence header) + (offset of end position of I picture)) × (number of bytes of one data), ((2
0-1) × 3 + 2 + 2) × 8 bytes = 488 bytes. The video playback system uses the 8-byte data stored in the 488th byte from the beginning of the index 51 to store the I picture 43 of the twentieth GOP 42 from the beginning of the image data stored in the storage medium 2.
Can be completed.

As described above, by using the index 51, the moving picture reproducing system can instantly read an arbitrary GOP header and an I picture.
As described with reference to FIG. 4, since the GOP 42 is composed of a predetermined number of still image data, the position at which an arbitrary time has elapsed from the beginning of the video stream is determined based on the number of still images displayed per unit time. Can be instantaneously read out. Further, by repeating reading of an arbitrary I picture, frame advance, reverse reproduction and the like can be performed.

Next, the procedure for creating the index 51 will be described with reference to the flowchart of FIG. In step S11, the optical disk driver 31 of the microcomputer system 1 reads a part of moving image data (data divided into a predetermined length) from the storage medium 2 in the order of output as a video stream. In step S12, the CPU 21 of the microcomputer system 1 determines whether a part of the moving image data read in step S11 includes the sequence end described in FIG. If it is determined that the sequence end is not included in the part, the process proceeds to step S13, and it is determined whether or not a part of the moving image data read in step S11 includes the sequence header described in FIG. judge.

If it is determined in step S13 that a part of the moving image data includes a sequence header, the procedure proceeds to step S14, in which the CPU 21
Since the index 51 is newly created, the RAM 23
Is set to 0 in the index counter stored in. In step S15, the CPU 21 determines that the index 51
Write the data indicating the start position of the sequence header at the head of. In step S16, the CPU 21
The index counter stored in M23 is incremented. In step S17, the CPU 21 writes data indicating the end position of the sequence header at the head of the index 51, and proceeds to step S19.

If it is determined in step S13 that a part of the moving image data does not include the sequence header, the procedure proceeds to step S18, where the CPU 21
Writes data into the existing index 51,
The index counter stored in the RAM 23 is incremented, and the process proceeds to Step S19.

In step S19, the CPU 21
In part of the moving image data read in step S11,
It is determined whether or not the GOP header described in FIG. 4 is included. If it is determined that the GOP header is included in a part of the moving image data, the process proceeds to step S20, where the index counter of the index 51 is designated. GO where
Data indicating the start position of the P header is written, the process returns to step S11, and the process is repeated.

If it is determined in step S19 that a part of the moving image data does not include the GOP header, the procedure proceeds to step S21, in which the CPU 21
In part of the moving image data read in step S11,
It is determined whether or not the picture header of the I picture 43 is included. If it is determined that the picture header of the I picture 43 is included in a part of the moving image data, the process proceeds to step S22. In step S22, the CPU 21
Writes data indicating the start position of the picture header of the I picture 43 at the position specified by the index counter of the index 51, returns to step S11, and repeats the process.

If it is determined in step S21 that a part of the moving image data does not include the picture header of the I picture 43, the procedure proceeds to step S23,
The CPU 21 determines whether part of the moving image data read in step S11 includes data at the position where the I picture 43 ends, and determines
If it is determined that the data at the end position of the I picture 43 is included, the process proceeds to step S24, where data indicating the end position of the I picture 43 is written in the position specified by the index counter of the index 51, and the process proceeds to step S11. And repeat the process.

If it is determined in step S23 that part of the moving image data does not include the data at the position where the I picture 43 ends, the procedure proceeds to step S11.
And repeat the process.

If it is determined in step S12 that a part of the moving image data includes a sequence end, the video stream ends, and the process ends.

Thus, the position of the sequence header, G
An index 51 composed of data indicating the position of the OP and the position of the I picture 43 is created on the storage medium 2.

Finally, referring to the index 51, a process of reproducing moving image data will be described with reference to the flowchart of FIG. In step S31, the keyboard 25 or the mouse 2 of the microcomputer system 1
6 is operated to set a position where reproduction of the moving image data is started. In step S32, the keyboard 25 or the mouse 26 is operated, and a position at which the reproduction of the moving image data ends is set. In step S33, the keyboard 25 or the mouse 26 is operated to perform normal playback,
A playback mode of moving image data such as frame-by-frame or reverse playback is set.

In step S34, the CPU 21 of the microcomputer system 1 executes the calculation described with reference to FIG. 5, operates the optical disk driver 31, and starts reproducing moving image data from the index 51 stored in the storage medium 2. The data (the data at the start position of the I picture 43 and the data at the end position of the I picture 43) in which the positions to perform are stored are read. In step S35, the CPU 21 operates the optical disk driver 31, reads out the moving image data corresponding to the reproduction start position from the storage medium 2 based on the data read out in step S34, and reproduces the moving image data via the communication board 30. Device 3
Output to

In step S36, the CPU 21
Referring to the data set in step S33, it is determined whether or not the playback mode of the moving image data is a so-called trick mode such as frame advance or reverse playback, and the playback mode of the moving image data is not the trick mode (normally). Playback)
If it is determined that the moving image data has a predetermined size, the process proceeds to step S37, in which the moving image data having a predetermined size is continuously read from the storage medium 2 to the optical disk driver 31, and is output to the moving image reproducing device 3.
In step S38, the CPU 21 determines in step S3
It is determined whether or not the moving image data read in step 7 is the moving image data corresponding to the position where the reproduction of the moving image data set in step S32 ends, and the moving image corresponding to the position where the reproduction ends. If it is determined that the data is not image data, the process returns to step S37, and the process of reading moving image data is repeated. If it is determined in step S38 that the data is moving image data corresponding to the position where the reproduction ends,
The process of reproducing the moving image data ends.

If it is determined in step S36 that the reproduction mode of the moving image data is the trick mode,
Proceeding to step S39, the CPU 21 obtains the I picture 43 to be read next from the setting of the reproduction mode, executes the calculation described with reference to FIG. 5, operates the optical disk driver 31, and operates the index 51 stored in the storage medium 2. From
Data in which the I picture 43 is stored (I picture 43
At the start position and the data at the end position of the I picture 43). In step S40, C
The PU 21 operates the optical disk driver 31 to read the moving image data corresponding to the reproduction start position from the storage medium 2 based on the data read in step S39, and output the moving image data to the moving image reproduction device 3 via the communication board 30. I do. In step S41, the CPU 21 stores the moving image data read in step S40 in step S32.
It is determined whether or not the moving image data corresponds to the position where the reproduction of the moving image data set in the step is ended. If it is determined that the moving image data is not the moving image data corresponding to the position where the reproduction ends, the process returns to step S39. Then, the process of reading the moving image data is repeated. If it is determined in step S41 that the moving image data corresponds to the position where the reproduction ends, the processing of reproducing the moving image data ends.

As described above, the microcomputer system 1 can read the moving image data from the storage medium 2 with reference to the index 51 stored in the storage medium 2 and output the data to the moving image reproducing device 3. Quickly play the moving image corresponding to the playback start position, or
Alternatively, reproduction in a trick mode such as reverse reproduction can be performed.

Next, a moving picture recording system for creating and recording the index 51 simultaneously with the compression of the moving picture data will be described. FIG. 9 is a block diagram illustrating the configuration of a moving image recording system according to an embodiment of the present invention. The moving image recording device 61 generates moving image data based on a video signal supplied from a video camera or a video tape recorder (not shown), and compresses the moving image data by a predetermined method such as MPEG2. Video stream 41 described in
And supplies it to the microcomputer system 1. The audio recording device 62 generates audio data based on an audio signal supplied from a microphone or a video tape recorder (not shown), and converts the audio data into an MPEG.
The data is compressed by a predetermined method such as 2 audio, converted into an audio frame format, and supplied to the microcomputer system 1.

The microcomputer system 1 creates an index 51 based on the moving image data supplied from the moving image recording device 61, and multiplexes the moving image data and the compressed audio data which are compressed in a predetermined format. And record it on the recording medium 2 together with the index 51.
At this time, the index 51 and the moving image data may be stored together in one file, or may be stored as individually different files.

The operation of recording moving image data and the index 51 of the moving image recording system will be described in more detail with reference to FIG. The image data generator 71 of the moving image recording device 61 generates moving image data from an input video signal of a predetermined system such as NTSC and supplies the generated moving image data to the encoder 72. The encoder 72 compresses the moving image data supplied from the image data generator 71 into the moving image data described with reference to FIG. 4 by a method such as MPEG2, converts the moving image data into a video stream 41 format, and outputs it to the microcomputer system 1. I do. The microcomputer system 1 creates an index 51 having the format shown in FIG. 6 and records the index 51 on the recording medium 2 by the same processing as the processing shown in the flowchart of FIG.

As described above, the moving image recording system shown in FIGS. 9 and 10 can generate and record the index 51 together with the recording of the moving image data.

Next, the file format when the index and the moving image data are stored in the same file will be described. FIG. 11A is a diagram illustrating a format of a file in which an index is stored at the head and moving image data is stored following the index. FIG. 11 (B)
FIG. 4 is a diagram illustrating a format of a file that stores moving image data at the beginning and stores an index following the moving image data. The file in the format shown in FIG.
In the case of creating a file in the format shown in (B), the microcomputer system 1 temporarily stores the index as a single file in the recording medium 2 (may be stored in the RAM 23 or the HDD 28 of the microcomputer system 1). After the creation of the index file and the compressed moving image data file is completed, the index file and the compressed moving image data file are combined (merged) into one file.

The file of the format shown in FIG. 11A can read out the index more quickly than the format shown in FIG. 11B, and when reproducing a moving image, particularly in the trick mode. Sometimes it is advantageous. In the file of the format shown in FIG. 11B, the movement of the data required for the process of combining the index file and the compressed moving image data file is small, and reading or writing the data requires a relatively long time. There is an advantage that the process of combining files using the recording medium 2 such as an optical disk can be performed quickly.

FIG. 11C is a view for explaining a file format in which indexes are dispersed and stored between compressed image data. When creating a file in the format shown in FIG. 11C, the microcomputer system 1
When moving image data of a predetermined data amount (1 MB to 10 MB) or moving image data of a predetermined time (1 minute to 10 minutes) is recorded on the recording medium 2, an index is written following the moving image data, and the index is written. Is stored. After writing the index, the moving image data is recorded on the recording medium 2 following the index.

Until the creation of the moving image data is completed, the microcomputer system 1 causes the recording medium 2 to repeat the recording of the moving image data and the recording of the index. When the creation of the moving image data is completed, even if the moving image data has not reached the predetermined data amount or the predetermined time, the microcomputer system 1 causes the index up to that point to be recorded on the recording medium 2 and finally, Data indicating the positions of the indexes dispersedly recorded on the recording medium 2 is recorded.

The file of the format shown in FIG. 11C has the advantage that the recording area required for creating the index is small.

The microcomputer system 1 is shown in FIG.
1A is converted to a file having the format shown in FIG. 11B or a file having the format shown in FIG. 11C, and the file having the format shown in FIG.
A file in the format shown in FIG.
Convert to a file in the format shown in FIG.
A file in the format shown in FIG. 11C may be converted into a file in the format shown in FIG. 11A or a file in the format shown in FIG.

The index may be recorded in a private packet of the MPEG2-program stream. FIG. 12 is a diagram illustrating the structure of an MPEG2-program stream and a PES (Packetized Elementary Stream) packet. The MPEG2-program stream is composed of one or more packs. The first pack contains a pack header, a system header, and one or more PES packets or one or two PES packets.
The second and subsequent packs are composed of the above PSI (Program Specific Information) packets, and include a pack header and one or more PEs.
It is composed of S packets or one or more PSI packets.

The PES packet is classified into one of a video packet, an audio packet, a private 1 packet, a private 2 packet, and a padding packet (not shown). The stream ID included in the packet start code and having 8 bits of data is:
Each packet type has a unique value. That is, P
The type of the ES packet is identified by the value of the stream ID.

The microcomputer system 1 stores an index in a packet data byte of one private packet or two private packets. The index may be stored in one private one packet or two private packets, or may be divided into two or more private one packets or two private packets and stored.

As described above, the microcomputer system 1 can store an index in a predetermined packet of the MPEG2-program stream. When playing back moving image data in which an index is stored in a private packet using a moving image playback apparatus that cannot use an index, the index is ignored and normal playback is performed.

Although the index 51 has been described as being stored in the storage medium 2 in which the moving image data is stored, the index 51 may be stored in another medium such as the HDD 28, for example.

The moving picture reproducing device 3 and the sound reproducing device 4 are directly connected to the interface 24, and the data is
Under the control of the CPU 21, the video data may be input to the video playback device 3 and the audio playback device 4 via the interface 24.

In this specification, the system is
It is assumed that the device as a whole is constituted by a plurality of devices.

[0061]

According to the image processing apparatus of the first aspect, data indicating the positions of a plurality of unit data of the digital moving image data is created.
Playback of moving images such as playback from an arbitrary position and frame advance can be performed.

According to the image processing apparatus of the fourth aspect and the image processing method of the fifth aspect, data indicating positions of a plurality of unit data of digital moving image data is read, and based on the read data, Digital video data reading is controlled, so playback from any location,
Operations such as frame advance can be performed.

According to the image recording medium of the sixth aspect,
Since the data indicating the positions of a plurality of unit data of the digital moving image data is recorded, it is possible to perform a moving image reproducing operation such as reproduction from an arbitrary position, frame advance, etc. during reproduction. Become.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a moving image playback system according to the present invention.

FIG. 2 is a diagram illustrating details of an operation of reproducing moving image data of the moving image reproduction system.

FIG. 3 is a diagram illustrating a hardware configuration of the microcomputer system 1.

FIG. 4 is a diagram illustrating the structure of moving image data according to the MPEG2 system.

FIG. 5 is a diagram illustrating a relationship between an index 51 and moving image data.

FIG. 6 is a diagram illustrating the structure of an index 51.

FIG. 7 is a flowchart illustrating a procedure for creating an index 51;

FIG. 8 is a flowchart illustrating a process of reproducing moving image data with reference to an index 51;

FIG. 9 is a block diagram illustrating a configuration of an embodiment of a moving image recording system according to the present invention.

FIG. 10 is a diagram illustrating details of an operation of recording moving image data and an index 51 of the moving image recording system.

FIG. 11 is a diagram illustrating a file format when an index and moving image data are stored in the same file.

FIG. 12: MPEG2-program stream and PES
FIG. 3 is a diagram illustrating the structure of a packet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Microcomputer system 2 Storage medium 3 Video reproduction device 21 CPU 31 Optical disk driver 42 GOP 43 I picture 51 Index 61 Video recording device

 ──────────────────────────────────────────────────続 き Continued on front page F term (reference) 5C053 FA22 FA24 GB06 GB07 GB08 GB11 GB21 GB22 GB38 HA21 HA25 JA12 JA21 JA30 KA01 KA05 KA20 KA24 LA01 LA06 5C059 LB07 MA00 MA23 PP05 PP06 PP07 PP14 RB01 RC04 RC32 SS13 SS16 SS18 SS30 UA UA31 UA39

Claims (7)

[Claims] 1. An image processing apparatus for processing digital moving image data including a data sequence in which a plurality of unit data are arranged in chronological order, wherein position data for creating data indicating positions of the plurality of unit data of the digital moving image data. An image processing apparatus comprising a creation unit. 2. The image processing apparatus according to claim 1, wherein the position data creating unit creates data indicating the position when reproducing the digital moving image data. 3. The image processing apparatus according to claim 1, wherein the position data creating unit creates data indicating the position when recording the digital moving image data. 4. An image processing apparatus for processing digital moving image data including a data sequence in which a plurality of unit data are arranged in chronological order, wherein position data reading for reading data indicating positions of the plurality of unit data of the digital moving image data. An image processing apparatus comprising: means for reading digital moving image data based on data read by the position data reading means. 5. An image processing method for processing digital moving image data including a data sequence in which a plurality of unit data are arranged in chronological order, wherein position data reading for reading data indicating positions of the plurality of unit data of the digital moving image data. And an image read control step of controlling reading of digital moving image data based on the data read in the position data read step. 6. An image recording medium on which digital moving image data including a data string in which a plurality of unit data are arranged in chronological order is recorded, wherein data indicating positions of the plurality of unit data of the digital moving image data is recorded. An image recording medium characterized in that: 7. The image recording medium according to claim 6, wherein the data indicating the position is recorded in the same file as the digital moving image data.