JP2000115665A - Image recording apparatus and method, and storage medium - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To enable high-speed retrieval and cueing of a scene during reproduction. SOLUTION: Input video data is transmitted through an interface 4
2 is stored in the memory 44. The scene change detection circuit 26 detects the presence or absence of a scene change from the data of the current frame from the memory 24 and the immediately preceding two frames from the buffer memory 48. When a scene change is detected, the scene change information adding circuit 30
Acquires the frame data from the frame data memory 24, adds scene change information to the pack of the frame data, and outputs it to the changeover switch 32. The changeover switch 32 selects the output of the scene change information adding circuit 30 under the control of the scene change detection circuit 26 when there is a scene change, and outputs the frame data from the memory 24 when there is no scene change. Select and output to the recording processing circuit 34.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image recording apparatus and method for recording video data including image data and system information, and a storage medium.

[0002]

2. Description of the Related Art In a conventional image photographing and recording system in which an image pickup apparatus and an image recording apparatus are integrated like a video camera, recording of a photographed image on a recording medium is started in response to a recording start instruction. In addition, recording start information indicating the start of new recording is recorded on a recording medium.

[0003] This recording start information is handled in the same manner as scene change information. That is, at the time of playback by the playback device, by using the recording start information as the scene change information, it becomes possible to automatically perform a high-speed search and cueing of the scene.

[0004] A digital video camera will be described as an example. In a digital video camera, a DV format is used as a video recording format. The DV format uses an intra-frame encoding method, and video data is composed of frame data for each frame, and the frame data is DCT (discrete cosine transform) and VL
It consists of frame image data compressed and encoded using C (variable length encoding), audio data and system information.

[0005] System information is held in the form of a pack. As shown in FIG. 7, the pack has a fixed length of 5 bytes. The first byte is a pack header, and the remaining 4 bytes are pack data. In the digital video camera, at the start of recording, a flag (recording start flag) REC ST indicating recording start information in a pack (pack header: 0x61) called a source control pack is set to 1
And record. At the time of reproduction, the head of the scene can be searched by the flag REC ST.

[0006]

An imaging and recording system in which an imaging device and an image recording device are separated and independent from each other and are connected to each other via a network is also conceivable. In such a system, the image recording apparatus only records the input video, and recording start information is not always input to the image recording apparatus as in the case of the integrated type. It is considered that a scene change situation occurs in addition to the start of recording.

For example, as shown in FIG. 8, in a system in which a plurality of cameras can be switched by a changeover switch and an image of each camera is recorded by one recording device,
Consider a case where a camera is switched by a changeover switch. In this case, a scene change occurs when the changeover switch is switched. However, there may be a case where an instruction to start recording or a scene change is not supplied to the image recording apparatus. In this case, the recording start information or the scene change information is not recorded in the system information despite the scene change part. Therefore, in a reproducing apparatus that obtains information indicating a scene change from system information, it is not possible to search for and locate a high-speed scene during reproduction, which is very inconvenient.

[0008] An object of the present invention is to provide an image recording apparatus and method and a storage medium which have solved such inconveniences.

[0009]

An image recording apparatus according to the present invention is an image recording apparatus for recording video data having image data and system information on a recording medium, comprising: a video data input means; A data memory for temporarily storing video data input by the input means, and a scene change detection means for detecting the presence or absence of a scene change of the video data input by the video data input means;
When a scene change is detected by the scene change detecting unit, a scene change information adding unit that includes information indicating the scene change in system information, and when a scene change is detected according to a detection result of the scene change detecting unit. Selecting the video data whose system information has been changed by the scene change information adding means,
When a scene change is not detected, there is provided a selecting means for selecting video data on the data memory, and a recording processing means for recording the video data selected by the selecting means on the recording medium. .

An image recording apparatus according to the present invention is an image recording apparatus for recording video data having image data and system information on a recording medium, wherein the video data is input by the video data input means and the video data input means. A data memory for temporarily storing the video data, a scene change information search unit for searching whether or not system information of the video data input by the video data input unit includes information indicating a scene change; A scene change detecting means for detecting the presence or absence of a scene change when the information indicating the scene change is not searched by the information searching means; and a system change indicating the scene change when the scene change is detected by the scene change detecting means. Scene change information adding means for including information, When a scene change is detected by the scene change detecting means according to the search result of the scene information detecting means and the detection result of the scene change detecting means, the information indicating the scene change is not searched by the scene change information searching means. Selecting the video data whose system information has been changed by the scene change information adding means, and selecting the video data on the data memory otherwise, and recording the video data selected by the selecting means. Recording processing means for recording on a medium.

An image recording method according to the present invention is an image recording method for recording video data including image data and system information on a recording medium, wherein video data input by video data input means is stored in a data memory. A storage step of temporarily storing, a scene change detecting step of detecting the presence or absence of a scene change of the video data input by the video data input means, and a system change when the scene change is detected by the scene change detecting step. A scene change information adding step that includes information indicating a scene change, and, when a scene change is detected according to the detection result of the scene change detecting step, video data whose system information has been changed by the scene change information adding step is selected. And a scene change is detected If no, characterized by comprising a selection step of selecting the video data on the data memory, and a recording processing step of recording the video data selected by the selection step on the recording medium.

An image recording method according to the present invention is also an image recording method for recording video data having image data and system information on a recording medium, wherein video data input by video data input means is stored in a data memory. A storage step for temporarily storing, a scene change information search step for searching whether or not system information of video data input in the video data input step includes information indicating a scene change; A scene change detecting step for detecting the presence or absence of a scene change when information indicating a change is not retrieved; Information adding step; According to the search result of the scene change information search step and the detection result of the scene change detection step, information indicating a scene change is not searched by the scene change information search step, but a scene change is detected by the scene change detection step. In this case, the video data whose system information has been changed by the scene change information adding step is selected. Otherwise, the selection step of selecting the video data on the data memory and the video data selected by the selection step are performed. And a recording process step of recording on the recording medium.

The storage medium according to the present invention stores program software for executing the above-described image recording method.

[0014]

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

FIG. 1 is a schematic block diagram of a first embodiment of the present invention. In this embodiment, it is assumed that the input interface of the video data is the IEEE 1394 interface, and the format of the video data is the DV format used for a digital video camera or the like.

Reference numerals 10 and 12 denote cameras as image pickup devices;
Is a changeover switch for switching the outputs of the cameras 10 and 12, and 20 is the image recording apparatus of the present embodiment.

The image recording device 20 includes the following components. 22, an IEEE 1394 interface for capturing video data output from the changeover switch 14,
Reference numeral 24 denotes a frame data memory for storing one frame of video data captured by the IEEE 1394 interface 22;
A scene change detection circuit 28 detects a scene change from video data stored in the buffer memory 28 stores two frames of previous frame data for detecting a scene change, and 30 stores a scene change in a pack of video data. This is a scene change information adding circuit for adding information.

A switch 32 is connected to the frame data read from the memory 24 or the output of the scene change information adding circuit 30 under the control of the scene change detecting circuit 26. Is a recording processing circuit that performs a recording process on the recording medium 36 and records it on the recording medium 36.

The recording medium 36 comprises, for example, a magnetic tape, a hard disk, an optical disk, a magneto-optical disk, or a solid-state memory.

FIG. 2 shows an operation flowchart of this embodiment. The operation of the present embodiment will be described with reference to FIG.

Each of the cameras 10 and 12 outputs the image data captured by the camera, and the changeover switch 14 allows the output of the cameras 10 and 12 to be freely selected. Camera 10, 1
2 outputs frame data every 1/30 second in the case of the NTSC system, for example.

IEEE 1394 interface 22
Is the camera 10 selected by the changeover switch 14
Alternatively, the output video data of 12 is fetched and written into the frame data memory 24 (S1). For example, in the case of the NTSC system, the IEEE 1394 interface 22
The frame data is fetched every 30 seconds and sequentially written to the frame data memory 24.

The scene change detection circuit 26 has a memory 2
4 and the frame data of the immediately preceding frame and one frame before the frame data from the buffer memory 28 to detect the presence or absence of a scene change (S2). In the case of the NTSC system, the scene change detection circuit 26 detects the presence or absence of a scene change every 1/30 seconds.

Examples of a method of detecting a scene change include a method of decoding frame image data of a plurality of images to be compared and applying motion detection to the decoded image data, and a method of using a histogram of pixel values of the frame data. and so on. Although these methods may be applied only to luminance data, even if they are applied only to color difference signals,
You may apply to both a luminance signal and a color difference signal.

Furthermore, a scene change can also be detected by comparing values that can be obtained by decoding part of the frame image data without decoding the entire frame image data. For example, a scene change can be detected by comparing DCT coefficients. Also in this case, only the luminance data, only the color difference signal, and both the luminance signal and the color difference signal may be used.

When a scene change is detected (S3), the scene change detection circuit 26 outputs a pack addition command to the scene change information addition circuit 30, and switches the changeover switch 32 to the output side of the scene change information addition circuit 30 (S3). (b contact) (S4). When a scene change is not detected (S3), the scene change detection circuit 26 connects the changeover switch 32 to a data line (a contact) from the memory 24 (S5).

When the scene change detecting operation is completed, the scene change detecting circuit 26 erases the frame data two frames before from the buffer memory 28 and writes the current frame data into the buffer memory 28 instead. Thus, the buffer memory 28 always stores the frame data of one frame before and the frame data of two frames before.

Upon receiving the scene change information addition command from the scene change detection circuit 26, the scene change information addition circuit 30 acquires frame data from the frame data memory 24, and adds scene change information to the pack of the frame data. Output to the changeover switch 32 (S6). Specifically, the scene change information is a recording start flag RECST in a pack (pack header: 0x61) called a source control pack, and '1' is set to this.

Under the control of the scene change detecting circuit 26, the changeover switch 32 selects frame data output from the scene change information adding circuit 30 when there is a scene change, and selects the memory data when there is no scene change. The frame data from 24 is selected and output to the recording processing circuit 34. For example, in the case of the NTSC system, frame data is output every 1/30 second.
4 is input. The recording processing circuit 34 performs a predetermined recording process on the frame data from the switch 32, and records the frame data on the recording medium 36 (S7).

The processing shown in FIG. 2 is for one frame of data.
The process shown in FIG. 2 is executed every second.

Although it has been described that the buffer memory 28 holds two frame data, one or three or more frame data may be held.

Although it has been described that the recording start flag RECST is set when a scene change is detected, unique data indicating a scene change may be recorded using a maker option of the pack.

FIG. 3 is a schematic block diagram of a second embodiment of the present invention. The same components as those in FIG. 1 are denoted by the same reference numerals.

An image recording apparatus 40 according to the second embodiment includes the following elements. Reference numeral 42 denotes an IEEE 13 that captures video data output from the changeover switch 14.
A frame data memory 94 stores frame data of one frame of video data captured by the IEEE 1394 interface 42. A frame data memory 46 stores scene data from the video data stored in the memory 44 in the same manner as the scene change detection circuit 26. A scene change detection circuit 48 for detecting a change is a buffer memory for storing two frames of previous frame data for detecting a scene change. These elements are
It functions similarly to the embodiment shown in FIG.

Reference numeral 50 denotes a pack obtaining circuit for obtaining all packs from the frame data read from the memory 44, and 52 searches whether or not there is scene change information in all the packs obtained by the pack obtaining circuit 50. The scene change information search circuit 54 is a scene change information adding circuit that adds scene change information to a pack of video data. Reference numeral 56 denotes a changeover switch connected to the frame data (contact a) read from the memory 44 or the output (contact b) of the scene change information adding circuit 54 under the control of the scene change information search circuit 52.

Reference numeral 58 denotes a switch for selecting the output (a contact) of the switch 56 or the frame data (b contact) read from the frame data memory 44 under the control of the scene change detection circuit 46. And a recording processing circuit for recording the video data from the recording medium 62 and recording it on the recording medium 62.

The recording medium 62 is, like the recording medium 36,
For example, it comprises a magnetic tape, a hard disk, an optical disk, a magneto-optical disk, or a solid-state memory.

FIG. 4 is a flowchart showing the operation of the embodiment shown in FIG. The operation of the embodiment shown in FIG. 3 will be described with reference to FIG.

As in the case of the embodiment shown in FIG. 1, the cameras 10 and 12 output the video data respectively shot, and the changeover switch 14 can freely select the output of the cameras 10 and 12. The cameras 10 and 12 are, for example, NT
In the case of the SC system, frame data is output every 1/30 seconds.

IEEE 1394 interface 42
Is the camera 10 selected by the changeover switch 14
Alternatively, the output video data of 12 is fetched and written into the frame data memory 24 (S11). For example, in the case of the NTSC system, the IEEE1394 interface 42
The frame data is fetched every / 30 seconds and sequentially written to the frame data memory 44.

The scene change detection circuit 46 is provided in the memory 4
4 and the frame data of the immediately preceding frame and the frame immediately before the frame data from the buffer memory 48, and the scene change detection circuit 26
The presence or absence of a scene change is detected in the same manner as in (1).
2). In the case of the NTSC system, the scene change detection circuit 4
6 detects the presence or absence of a scene change every 1/30 seconds.

When a scene change is detected (S13), the scene change detection circuit 46 sets the pack acquisition circuit 5
Issue a pack acquisition command to 0 and switch 5
8 is connected to the contact a (S15), and if no scene change is detected (S13), the changeover switch 58
Is connected to the contact b (S14).

When the scene change detecting operation is completed, the scene change detecting circuit 46 erases the frame data two frames before from the buffer memory 48 and replaces the current frame data with the buffer memory 48 instead of the buffer memory 48, similarly to the scene change detecting circuit 26. Write to 48. Thus, the buffer memory 48 always stores the frame data of one frame before and the frame data of two frames before.

In accordance with the pack acquisition command from the scene change detection circuit 46, the pack acquisition circuit 50 extracts all packs from the frame data output from the frame data memory 44 and outputs the packs to the scene change information search circuit 52 (S16). . Scene change information search circuit 52
Search for information indicating a scene change in all the packs supplied from the pack acquisition circuit 50 (S
17). For example, when the recording start flag RECST in the source control pack (pack header: 0x61) is handled as information indicating a scene change, the flag RE
Check whether CST is '1'.

When there is no information indicating a scene change in the pack (when the flag RECST is "0") (S
18), the scene change information search circuit 52 outputs a scene change information addition command to the scene change information addition circuit 54, and connects the changeover switch 56 to the contact b (output of the scene change information addition circuit 54) (S).
20). When there is information indicating a scene change (when the flag RECST = '1'), the scene change information search circuit 52 connects the changeover switch 56 to the data line (a contact) from the memory 44 (S19).

When receiving the scene change information addition command from the scene change information search circuit 52, the scene change information addition circuit 54 acquires frame data from the frame data memory 44, and adds the scene change information to the pack of the frame data. And outputs it to the changeover switch 56 (S21). The scene change information is, specifically, a recording start flag REC_ST in a pack (pack header: 0x61) called a source control pack.
And set '1' to this.

The changeover switch 56 is connected to the contact a when the scene change information search circuit 52 detects a flag indicating a scene change (for example, a recording start flag), and is connected to the contact b otherwise. . Therefore,
In any case, the frame data supplied from the switch 56 to the contact a of the switch 58 is data having a flag indicating a scene change (for example, a recording start flag) in a predetermined pack.

As described above, the changeover switch 5
8, when the scene change detection circuit 46 detects a scene change, it connects to the contact a to select the frame data from the switch 56, and when there is no scene change, the frame data from the memory 44 is The selected data is output to the recording processing circuit 60 in each case.
For example, in the case of the NTSC system, frame data is input to the recording processing circuit 60 every 1/30 second. The recording processing circuit 60 performs a predetermined recording process on the frame data from the switch 58 and records the frame data on the recording medium 62 (S2).
2).

The processing shown in FIG. 4 is similar to the processing shown in FIG.
In the case of the method, the processing shown in FIG. 4 is executed every 1/30 seconds.

Although it has been described that the buffer memory 48 holds two frame data, one or three or more frame data may be held.

Although a flag RECST indicating recording start information is set when a scene change is detected, unique data indicating a scene change may be recorded using a maker option of a pack.

In the embodiment shown in FIG. 3, even when the scene change detection circuit 46 detects a scene change, if information indicating a scene change is already included in the frame data, it is utilized as it is, and the frame change is detected. Only when the data does not include information indicating a scene change, information indicating a scene change is newly added.
Therefore, information indicating a scene change does not overlap.

FIG. 5 is a schematic block diagram of a third embodiment of the present invention. The same components as those in FIG. 1 are denoted by the same reference numerals.

Reference numeral 70 denotes an image recording apparatus according to the third embodiment, which comprises the following elements. Reference numeral 72 denotes an IEEE 13 that captures video data output from the changeover switch 14.
Reference numeral 94 denotes a frame data memory for storing one frame of video data captured by the IEEE 1394 interface 72. Reference numeral 74 denotes a pack obtaining circuit for obtaining all packs from the frame data stored in the memory 74. Is a scene change information search circuit for searching whether or not there is scene change information in all the packs obtained by the pack obtaining circuit 76.

Reference numeral 80 denotes a scene change information search circuit 78
A scene change detection circuit for detecting a scene change from the video data stored in the memory 74 under the control of
The previous frame data for two frames is used for scene change detection by the scene change detection circuit 80.
This is a buffer memory for storing.

Reference numeral 84 denotes a scene change information adding circuit for adding scene change information to a pack of video data from the memory 74 in accordance with the detection result of the scene change detecting circuit 80. Reference numeral 86 denotes a changeover switch connected to the frame data (contact a) read from the memory 74 or the output (contact b) of the scene change information adding circuit 84 under the control of the scene change detection circuit 80.

Reference numeral 88 denotes a scene change information search circuit 78
A switch 90 for selecting the output (a contact) of the switch 86 or the frame data (b contact) read from the frame data memory 74 under the control of
And a recording processing circuit for recording the video data from the recording medium 92 and recording the video data on the recording medium 92.

The recording medium 92 is, for example, a magnetic tape, a hard disk, an optical disk, a magneto-optical disk, or a solid-state memory, like the recording media 36 and 62.

FIG. 6 is a flowchart showing the operation of the embodiment shown in FIG. The operation of the embodiment shown in FIG. 5 will be described with reference to FIG.

As in the case of the embodiment shown in FIGS. 1 and 3, the cameras 10 and 12 output the video data respectively shot, and the changeover switch 14 switches the cameras 10 and 1
2 can be freely selected. For example, in the case of the NTSC system, the cameras 10 and 12 output frame data every 1/30 seconds.

IEEE 1394 interface 72
Is the camera 10 selected by the changeover switch 14
Alternatively, the output video data of 12 is fetched and written into the frame data memory 74 (S31). For example, in the case of the NTSC system, the IEEE 1394 interface 72
The frame data is fetched every / 30 seconds and sequentially written to the frame data memory 74.

The pack acquisition circuit 76 extracts all the packs from the frame data output from the frame data memory 74 and outputs them to the scene change information search circuit 78 (S32). The scene change information search circuit 78
It is searched whether there is information indicating a scene change in all the packs supplied from the pack acquisition circuit 76 (S3).
3). For example, when the recording start flag RECST in the source control pack (pack header: 0x61) is handled as information indicating a scene change, the flag RE
Check whether CST is '1'. When the flag RECST is "0", that is, when no scene change information is recorded (S34), the scene change information search circuit 78 supplies a scene change detection command to the scene change detection circuit 80, The changeover switch 88 is connected to the contact a (S36), and the flag REC ST
Is "1", that is, when the scene change information is recorded, the changeover switch 88 is connected to the contact b (S35).

The scene change detecting circuit 80 fetches frame data from the memory 74 in accordance with a scene change detecting command from the scene change information retrieving circuit 78, and also stores the immediately preceding frame and its
The frame data before the frame is fetched, and the presence or absence of a scene change is detected by the same method as the scene change detection circuits 26 and 46 (S37). In the case of the NTSC system, the scene change detection circuit 80 detects the presence or absence of a scene change every 1/30 seconds.

When the scene change detection circuit 80 detects a scene change (S38), it issues a scene change information addition command to the pack change information addition circuit 84 and connects the changeover switch 86 to the contact b (S4).
0), if no scene change is detected (S3
8) Connect the changeover switch 86 to the contact a (S3)
9).

Unlike the scene change detection circuits 26 and 46, the scene change detection circuit 80 updates the frame data two frames before the buffer memory 48 with the current frame data regardless of the presence or absence of the scene change detection work. As a result, 1 is always stored in the buffer memory 48.
The frame data before the frame and the frame data two frames before are stored.

When receiving the scene change information adding command from the scene change detecting circuit 80, the scene change information adding circuit 84 acquires the frame data from the frame data memory 74, and adds the scene change information to the pack of the frame data. Output to the changeover switch 86 (S41). Specifically, the scene change information is a recording start flag RECST in a pack (pack header: 0x61) called a source control pack, and '1' is set to this.

When the scene change detection circuit 80 detects a scene change, the changeover switch 86 sets b
Connect to contact, otherwise connect to a-contact.
Therefore, when there is a scene change in the video data from the changeover switch 14 but no scene change information is included, the scene change information adding circuit 8
4, scene change information can be added.

The switch 88 is connected to the contact a to select the frame data from the switch 86 when the scene change information retrieving circuit 78 does not detect the scene change information, and to select the frame data from the switch 86 when the scene change information is detected. , And selects the frame data from the memory 74 and outputs the selected data to the recording processing circuit 90 in each case. For example, in the case of the NTSC system, frame data is input to the recording processing circuit 90 every 1/30 second. The recording processing circuit 90 performs a predetermined recording process on the frame data from the switch 88 and records it on the recording medium 92 (S4).
2).

The processing shown in FIG. 6 is for one frame of data, as in the processing shown in FIGS.
In the case of the NTSC system, the processing shown in FIG. 6 is executed every 1/30 second.

Although it has been described that the buffer memory 82 holds two frame data, one or three or more frame data may be held.

Although it has been described that the recording start flag RECST is set as the scene change information, unique data indicating a scene change may be recorded using a maker option of the pack.

In the embodiment shown in FIG. 5, if scene change information is included in the input video data, the recording process is performed as it is. If the scene change information is not included, whether or not there is a scene change is determined. In the case where there is a scene change, recording processing is performed by adding scene change information. When there is no scene change, recording processing is performed as it is. Thus, information indicating a scene change does not overlap.

The present invention may be applied to a system composed of a plurality of devices or an apparatus composed of one device.

Further, in order to operate various devices so as to realize the functions of the above-described embodiments, a computer in an apparatus or a system connected to the various devices is provided with software for realizing the functions of the above-described embodiments. The present invention also includes a case in which a program (code) is supplied and a computer (CPU or MPU) of the apparatus or system is operated by operating the various devices according to stored programs.

In this case, the program code itself of the software realizes the function of the above-described embodiment, and the program code itself and means for supplying the program code to the computer, for example,
A storage medium storing such a program code constitutes the present invention. As a storage medium for storing such a program code, for example, a floppy disk, hard disk, optical disk, magneto-optical disk, CD-ROM, magnetic tape, nonvolatile memory card, ROM and the like can be used.

When the computer executes the supplied program code, not only the functions of the above-described embodiment are realized, but also the OS (Operating System) or other operating system running on the computer. Even when the functions of the above-described embodiments are realized in cooperation with application software and the like, it goes without saying that such program codes are included in the embodiments of the invention according to the present application.

Further, the supplied program code is
After being stored in the memory provided in the function expansion board of the computer or the function expansion unit connected to the computer, the CPU or the like provided in the function expansion board or the function expansion unit performs one of the actual processing based on the instruction of the program code. It is needless to say that a case where the functions of the above-described embodiments are realized by performing all or part of the processes and executing the processing is also included in the invention according to the present application.

[0078]

As can be easily understood from the above description, according to the present invention, even when scene change information is not recorded in the system information of the input video data, a scene change is detected from the input video data. Video data can be recorded by adding new scene change information to system information. Even when a scene change is detected from the input video data, if the scene change information already exists in the system information, the video data can be recorded without being changed.

As a result, scene change information can be obtained from system information at the time of reproduction, and even with an existing reproduction apparatus, high-speed scene search and cueing can be performed at the time of reproduction.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram of a first embodiment of the present invention.

FIG. 2 is an operation flowchart of the embodiment shown in FIG. 1;

FIG. 3 is a schematic configuration block diagram of a second embodiment of the present invention.

FIG. 4 is an operation flowchart of the embodiment shown in FIG. 3;

FIG. 5 is a schematic configuration block diagram of a third embodiment of the present invention.

FIG. 6 is an operation flowchart of the embodiment shown in FIG. 5;

FIG. 7 is a diagram showing a pack structure of a DV format.

FIG. 8 is a schematic configuration block diagram of a system that switches a plurality of cameras and records the video with one recording device.

[Explanation of symbols]

 10, 12: Camera 14: Changeover switch 20: Image recording device 22: IEEE1394 interface 24: Frame data memory 26: Scene change detection circuit 28: Buffer memory 30: Scene change information addition circuit 32: Changeover switch 34: Recording processing circuit 36 : Recording medium 40: Image recording device 42: IEEE1394 interface 44: Frame data memory 46: Scene change detection circuit 48: Buffer memory 50: Pack acquisition circuit 52: Scene change information search circuit 54: Scene change information addition circuit 56: Changeover switch 58: switch 60: recording processing circuit 62: recording medium 70: image recording device 72: IEEE 1394 interface 74: frame data memory 76: pack acquisition circuit 78: system Nchenji information retrieval circuit 80: scene change detecting circuit 82: buffer memory 84: the scene change information adding circuit 86: selector switch 88: switch 90: the recording processing circuit 92: recording medium

Continued on front page F-term (reference) 5C052 AA01 AA17 AB03 AB04 AB05 AC08 CC06 CC11 DD04 5C053 FA21 FA23 FA27 GB06 GB22 GB26 GB32 HA29 JA21 KA04 KA08 KA22 KA24 LA01

Claims (21)

[Claims] 1. An image recording apparatus for recording video data having image data and system information on a recording medium, comprising: video data input means; and data for temporarily storing video data input by the video data input means. A memory, a scene change detecting means for detecting the presence or absence of a scene change in the video data input by the video data input means, and indicating a scene change in the system information when a scene change is detected by the scene change detecting means. Selecting a video data whose system information has been changed by the scene change information adding means when a scene change is detected in accordance with a detection result of the scene change information adding means including the information; Is not detected, the data memory Image recording apparatus characterized by comprising selecting means for selecting an image data and a recording processing means for recording video data selected by the selection means on the recording medium. 2. The scene change information adding means, when a scene change is detected by the scene change detecting means, searches whether or not video data on the data memory includes predetermined scene change information. 2. The image recording apparatus according to claim 1, further comprising a search unit, and an information adding unit that includes the scene change information in the system information of the video data in the data memory when the predetermined scene change information is not searched by the search unit. apparatus. 3. An image recording apparatus for recording video data comprising image data and system information on a recording medium, comprising: video data input means; and data for temporarily storing video data input by said video data input means. A memory, a scene change information searching means for searching whether or not information indicating a scene change is included in the system information of the video data input by the video data input means; and indicating a scene change by the scene change information searching means. A scene change detecting means for detecting the presence or absence of a scene change when information is not searched; and a scene change information adding means for including information indicating a scene change in system information when a scene change is detected by the scene change detecting means. And the search result of the scene change information search means. If the scene change information searching means does not search for the scene change information and the scene change detecting means detects the scene change, the scene change information is added according to the result and the detection result of the scene change detecting means. Selecting means for selecting the video data whose system information has been changed by the means, and otherwise selecting the video data on the data memory; and recording processing for recording the video data selected by the selecting means on the recording medium. And an image recording apparatus. 4. The image recording apparatus according to claim 1, wherein said video data has a plurality of frame image data, and each frame image data has corresponding system information. 5. The image recording apparatus according to claim 1, wherein said scene change detecting means detects a scene change by comparing preceding and following frame image data. 6. The image data input means according to claim 1, wherein
4. The image recording apparatus according to claim 1, comprising a 394 interface. 7. The image recording apparatus according to claim 1, wherein the video data conforms to a DV format, and the information indicating the scene change is recorded as a pack. 8. An image recording method for recording video data having image data and system information on a recording medium, comprising: a storage step of temporarily storing video data input by video data input means in a data memory; A scene change detecting step of detecting the presence or absence of a scene change in the video data input by the video data input means; and a scene including information indicating the scene change in the system information when the scene change is detected by the scene change detecting step. When a scene change is detected according to the detection result of the change information adding step and the scene change detecting step, the video data whose system information has been changed by the scene change information adding step is selected, and no scene change is detected. In addition, the data Image recording method characterized by comprising a selection step of selecting the video data in the re, and a recording processing step of recording the video data selected by the selection step on the recording medium. 9. The scene change information adding step retrieves whether or not video data on the data memory includes predetermined scene change information when a scene change is detected in the scene change detecting step. 9. A search step, and an information adding step of including scene change information in system information of video data on the data memory when the predetermined scene change information is not searched by the search step.
The image recording method described in 1. 10. An image recording method for recording video data having image data and system information on a recording medium, comprising: a storage step of temporarily storing video data input by video data input means in a data memory; A scene change information search step for searching whether or not information indicating a scene change is included in the system information of the video data input in the data input step; and when the information indicating the scene change is not searched by the scene change information search step A scene change detection step of detecting the presence or absence of a scene change; a scene change information adding step of including information indicating a scene change in system information when a scene change is detected by the scene change detection step; Information retrieval According to the search result of the step and the detection result of the scene change detection step, when the scene change information search step does not search for the information indicating the scene change, and the scene change detection step detects the scene change, the scene change is performed. Selecting the video data whose system information has been changed by the change information adding step, and otherwise selecting the video data on the data memory; and recording the video data selected by the selecting step on the recording medium. An image recording method comprising: 11. The image recording method according to claim 8, wherein said video data has a plurality of frame image data, and each frame image data has corresponding system information. 12. The scene change detecting step,
11. The image recording method according to claim 8, wherein a scene change is detected by comparing previous and subsequent frame image data. 13. The video data input means according to claim 11, wherein
11. The image recording method according to claim 8, comprising a 1394 interface. 14. The image recording method according to claim 8, wherein the video data conforms to a DV format, and the information indicating the scene change is recorded as a pack. 15. A storage medium for storing program software for executing an image recording method for recording video data including image data and system information on a recording medium, wherein the program software includes a video data input device. Means for temporarily storing video data input by the means in a data memory; detecting a scene change in the video data input by the video data input means; and detecting a scene change by the scene change detecting step. A scene change information adding step of including information indicating a scene change in system information when a change is detected; and a scene change information adding step when a scene change is detected in accordance with a detection result of the scene change detecting step. System A selecting step of selecting video data whose information has been changed and selecting video data on the data memory when a scene change is not detected; and recording the video data selected by the selecting step on the recording medium. And a processing step. 16. The scene change information adding step retrieves whether or not video data on the data memory includes predetermined scene change information when a scene change is detected in the scene change detecting step. 2. The method according to claim 1, further comprising: a search step; and an information adding step of including the scene change information in the system information of the video data on the data memory when the predetermined scene change information is not searched by the search step.
6. The storage medium according to 5. 17. A storage medium for storing program software for executing an image recording method for recording video data including image data and system information on a recording medium, wherein the program software includes a video data input A storage step of temporarily storing video data input by the means in a data memory; a scene change information search for searching whether system information of the video data input by the video data input step includes information indicating a scene change; A step, a scene change detecting step for detecting the presence or absence of a scene change when information indicating a scene change is not retrieved by the scene change information retrieving step; Scene to information According to the scene change information adding step including the information indicating the scene change, and the search result of the scene change information searching step and the detection result of the scene change detecting step, the information indicating the scene change is not searched by the scene change information searching step. When a scene change is detected by the scene change detection step, the video data whose system information has been changed by the scene change information adding step is selected, and otherwise, the video data on the data memory is selected. And a recording processing step of recording the video data selected in the selecting step on the recording medium. 18. The storage medium according to claim 15, wherein said video data has a plurality of frame image data, and each frame image data has corresponding system information. 19. The scene change detecting step includes:
18. The storage medium according to claim 15, wherein a scene change is detected by comparing preceding and following frame image data. 20. The video data input means according to claim 20, wherein
18. A device according to claim 15, comprising a 1394 interface.
The image recording method described in 1. 21. The storage medium according to claim 15, wherein the video data conforms to a DV format, and information indicating the scene change is recorded as a pack.