JP2001223980A - Recording medium, and video recording/reproducing device using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize editing for additionally recording and deleting picture data in the same recording medium while the medium can be used by equipments different in data format. SOLUTION: In the recoding medium, a picture file system 100 composed of a directory for MPEG animation 400 for recording an MPEG animation file, a directory for an MPEG still picture 500 for recording an MPEG still picture file, a directory for a JPEG still picture 600 for recording a JPEG still picture file and a management file 300 for recording management information showing a relation between the MPEG still picture file and the JPEG still picture file is constructed to record the same still picture in the directories 500 and 600 as the MPEG still picture file and the JPEG still picture file. In order to additionally record or delete a still picture, the MPEG still picture file and the JPEG still picture file of the same still picture information are additionally recorded in the directories 500 and 600, and these MPEG still picture file and JPEG still picture file are deleted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium for moving picture information and still picture information and a video recording / reproducing apparatus using the same.

[0002]

2. Description of the Related Art At present, digital still cameras which are generally available are based on J, an international standard for compression processing of still image information.
Still images are compressed in accordance with the PEG (Joint Photographic Expert Group) method and recorded on a removable storage medium such as a memory or a hard disk. In some models, digital recording of moving images is also possible. When digitally recording moving image data, MPEG (Moving Picture Experts Group), an international standard, is used.
(up) to generate a stream by compressing moving image data.

[0003] The MPEG standard includes M for storage media.
There is the PEG1 standard and the MPEG2 standard that supports high image quality in correspondence with broadcasting and communication. To achieve the same image quality as video cameras and VCRs currently in widespread use, compression using the MPEG2 standard is required. It is. However, MP
When performing compression recording of a moving image using the EG2 standard,
Since the amount of data is enormous compared to a still image, it can be recorded only for a short time in a memory or a hard disk which is now widely used.

[0004] Magnetic tapes and optical disks are considered as recording media for recording and reproducing a still image or moving image stream based on the JPEG or MPEG standards for a long time. It is certain that optical disks will become the mainstream in the future because of their good storage properties. A typical example of reading / writing image data on an optical disc is a DVD (Digital
There is a Versatile Disc) -RAM (hereinafter referred to as a DVD disc), and video cameras that can record video / audio data using the RAM have been announced by various companies.

[0005]

In an optical disk used as a storage medium, that is, a digital camera using a DVD-RAM (hereinafter referred to as a DVD camera), moving image information is recorded / reproduced in addition to still image information in terms of storage capacity. Becomes possible. When recording a moving image / still image mixture on a DVD-RAM, it is desirable for the DVD-RAM to have a directory structure in which moving image information and still image information are differentiated from the viewpoint of file management.

[0006] In this method, an image file system in which a moving image recording directory (MPEG_MOVIE_DIR) and a still image recording directory (MPEG_STILL_DIR) are provided in a top-level directory (root directory) on a recording medium is constructed on the recording medium. Is what you do. When recording moving image information, the moving image recording directory
Moving image information (hereinafter referred to as MPEG)
(Referred to as video information). When recording still image information, it is intra-frame coded according to the MPEG2 standard, and a stream of the generated still image information (hereinafter referred to as MPEG still image information) is stored in a still image recording directory. To record.

However, the still image recorded in this manner cannot be reproduced by a personal computer or another digital still camera. This is because, in these devices, still image information in a format compressed according to the JPEG standard which is already widely used (hereinafter referred to as JPEG still image information)
This is because many streams are handled. Therefore, JPEG still image information recorded on a DVD disk by a digital still camera can be taken into a personal computer having the JPEG standard (that is, having a coding circuit and a decoding circuit compliant with the JPEG standard) and processed. DVD with a DVD camera with MPEG standards
MPEG still picture information recorded on a disc cannot be imported to a personal computer.

In order for a DVD camera to capture still image information recorded on a DVD disk by a personal computer having the JPEG standard, JPEG still image information may also be recorded on the DVD disk. .
As a result, the DVD disk can be used for a device conforming to the MPEG standard and also for a device conforming to the JPEG standard, and the convenience is improved.

However, as described above, the DVD camera
The same still picture information, MPEG still picture information and J
In the case where the still image information is recorded as PEG still image information, when editing such still image information using a personal computer, a new still image is created on the personal computer and additionally recorded on the DVD disc, depending on the editing method. In some cases, unnecessary information in the still image information recorded on the DVD disc may be deleted. However, such editing can be performed only on the JPEG still image information. Become. For example, a DVD disc edited in this way
When played back on a DVD deck (recording / reproducing device) equipped with the PEG standard, the still image information additionally recorded on the personal computer cannot be played back. The information remains as still image information and is reproduced on the DVD deck.

[0010] An object of the present invention is to solve such a problem and to use a recording medium which enables good editing of still picture information without impairing the convenience of being able to be used in devices employing different compression formats, and using the same. It is to provide a video recording / reproducing device.

[0011]

In order to achieve the above-mentioned object, a recording medium according to the present invention comprises a plurality of recording media each of which stores a still image file in a corresponding compression format. An image file system including a directory and file information including management information indicating a relationship between the still image files recorded in each of the directories has been constructed, and the same still image information is stored in different compression formats. Each file is recorded as a still image file in the corresponding directory,
The still image information can be reproduced from any of the directories. With this configuration, it is possible to grasp the relationship between the still image files of different compression formats from the file information, and to easily find the still image file corresponding to the same still image information.

The video recording apparatus according to the present invention records still image information from the same video source as still image files in a plurality of different compression formats in respective directories of the recording medium. Management information for associating the still image file recorded in the directory is added to the file information, and when unnecessary still image information is deleted from the recording medium, based on the management information, In addition, a still image file corresponding to the unnecessary still image information is found from all directories, all of them are deleted, and management information for the still image files to be deleted is also deleted.

As a result, the added still image information is recorded as a still image file in all compression formats, and all the still image files corresponding to the unnecessary still image information are removed.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing the structure of a file system constructed in an embodiment of a recording medium according to the present invention, wherein 100 is an image file system, 200 is a root directory, 300 is a management file, and 400 is an MPEG moving image directory. , 500 is a directory for MPEG still images, and 600 is a directory for JPEG still images.

In the following description, it is assumed that the recording medium according to the present invention comprises an optical disk (DVD disk) as a DVD-RAM used in a DVD camera, and is capable of recording moving images and still images. The present invention is not limited to DVD discs as long as moving images and still images can be recorded in terms of capacity.

In this embodiment, a DVD camera uses a DVD
Enables still images recorded on a disc to be played on a personal computer or digital still camera. In a digital still camera, a still image is compressed in accordance with the JPEG standard and recorded on a DVD disc. When this is reproduced and displayed on a monitor, it must be expanded according to the JPEG standard. No. In a personal computer, the JPEG standard is used for processing of a still image recorded on a DVD disk by a digital still camera so that the still image can be captured and reproduced.

A DVD as a recording medium according to the present invention
Discs allow still images to be played back on digital still cameras and personal computers equipped with the JPEG standard for still images. For this purpose, moving images and still images are compressed according to the MPEG standard. And record
This same still image is compressed and recorded according to the JPEG standard. For this reason, the same still image is double-recorded in a format of a different compression standard. Thereby, D as a recording medium according to the present invention is
VD discs can play back moving images and still images with a video playback device that complies with the MPEG standard, and can also play back the same still images with JPEG standard devices such as conventional digital still cameras and personal computers. Becomes

Therefore, an image file system 100 having a directory structure shown in FIG. 1 is constructed on a DVD disk as a recording medium according to the present invention. That is, in the image file system 100, a root directory 200 is provided as a top directory, and file information (FILE INFO) including information related to a moving image file and a still image file recorded therein is recorded. The management file 300 and the MPEG standard (here, MP
MPEG that stores moving image information (MPEG moving image information) in a format compressed according to the EG2 standard but may be the MPEG1 standard).
Movie directory (MPEG_MOVIE_DIR) 400 and MP
An MPEG still image file that stores still image information (MPEG still image information) in a format compressed according to the EG standard (here, the same MPEG standard as a moving image, but may be a different MPEG standard) as an MPEG still image file Image directory (MPEG_STILL_DIR) 500 and MPEG
A JPEG still image directory for storing still image information (JPEG still image information) in the same format as the still image information recorded in the still image directory 500 and compressed according to the JPEG standard as a JPEG still image file ( JPEG_STILL_DIR) 600 is provided.

FIG. 2 is a diagram showing a specific example of an MPEG moving image file recorded in the MPEG moving image directory 400 in FIG.

In FIG. 1, an MPEG moving image directory 400 stores, for example, a data stream generated by compressing a series of moving image information obtained by one image pickup with a DVD camera according to the MPEG standard, as one unit of MPEG. A moving picture stream file (VOB: VideoObject) 401 is stored as one or more MPEG moving picture stream files 401. This MPEG video stream file 401
Is composed of one or more video stream units (VOBU: VOB Unit) 402 including one GOP (Group Of Picture) as a compression unit. The video stream unit 402 is an MP for each frame or field.
It is composed of an I picture (intra-frame or intra-field coded image) 403, a P picture (forward predicted coded image) 404, and a B picture (bidirectional predicted coded image) 405, which are coded images according to the EG standard. These pictures are arranged in the order of I, B, B, P, B, B, P,.... However, a B picture is not always necessary.

In the directory 400 for MPEG moving pictures,
The moving picture information is compressed in accordance with the MPEG standard and stored in such a stream, but the recording in this case is 1 GO
P, that is, a format added with the video stream unit 402 as a unit. This is because continuous reproduction and special reproduction can be easily performed during reproduction. Each time the video stream unit 402 is added and stored, the management information of the added video stream unit 402 (information type, program name, MPEG video stream file 40
1, the management file 30 in the root directory 200 is added.
0 is rewritten. Such management information is used for editing or searching for an MPEG moving image file.

FIG. 3 is a diagram showing a specific example of an MPEG still image file recorded in the MPEG still image directory 500 in FIG.

Referring to FIG. 1, a stream (MPEG still image file) generated by compressing still image information sequentially obtained by a DVD camera, for example, in accordance with the MPEG standard for each of them is stored in an MPEG still image directory 500. But,
It is stored as an MPEG still image stream file (VOB) 501. Video stream unit (VOBU) 502
Contains one stream of MPEG still image information, which constitutes one MPEG still image file. MPEG still image stream file 501
Is composed of one or more of the video stream units 502. Here, the MPEG still image information is
It forms an I-picture stream based on the MPEG standard. Therefore, the MPEG still image stream file 501 has an arrangement of I pictures.

The head of the video stream unit 502 indicates the head of the video stream unit 502 and the order of the video stream unit 502 which is an encoded image according to the MPEG standard for each frame or field in the MPEG moving image stream file 501. A sequence header (Sequence_Header) 503 indicating information or the like is added, and a GOP header (GOP_Header) indicating the head of an I picture or the like is added thereto.
ader) 504, a stream 505 of I pictures,
Finally, a sequence end code (Sequence_End_Code) 5
06 is added.

The MPEG still image file is additionally recorded in such a manner that a stream for one frame or one field is added to the MPEG still image stream file 501 in the directory 500 for MPEG still images. As a result, I pictures are recorded in a continuous array,
The data format is the same as that of the MPEG moving image file recorded in the moving image directory 400.
Development of playback applications is facilitated. Also, when recording still image information, M
The file information of the management file 300 (FIG. 1) in the root directory 200 is rewritten so that the MPEG still image file added to the PEG still image stream file 501 is also managed.

The JPEG still image directory 600 shown in FIG. 1 also has a file of the same configuration as that of the MPEG still image directory 500 for the stream of JPEG still image information, and the management information of the still image information in this file is provided. This is included in the file information of the management file 300. Further, the file information stored in the management file 300 is associated with the still image stored in the MPEG still image directory 500 and the same still image stored in the JPEG still image directory 600. Management information is also included.

FIG. 4 is a diagram schematically showing a specific example of file information for associating an MPEG still image file and a JPEG still image file in the image file system 100 in FIG. 1, wherein 301 indicates file information, and 602 indicates JPEG. It is a video stream unit (VOBU: JPEG still image file) of the still image information, and portions corresponding to FIGS. 1 and 3 are denoted by the same reference numerals. In addition, MPEG
The moving image directory 400 (FIG. 1) is omitted.

In this figure, it is assumed here that four still images A, B, C, and D are recorded on a DVD disk. The still image A is an MPEG still image stream file 500 in which the video stream unit 502 is MPEG.
The same still image A is recorded as a still image file AAA.
It is also recorded in the JPEG still image stream file 600 as a G still image file AAA.JPG. The management file 300 includes these MPEG still image files.
Management information AAA_info indicating that the AAA and the JPEG still image file AAA.JPG are of the same still image A is included in the file information 301. Still image B is MPEG still image stream file 500 and MPEG still image file
BBB and a JPEG still image file BBB.JPG are recorded in the JPEG still image stream file 600, respectively.
EG still image file BBB and JPEG still image file BBB.J
Management information indicating that the PG is the same still image B
BBB_info is included in the file information 301. Similarly, for the still images C and D, the MPEG still image file CC is added to the MPEG still image stream file 500.
C, DDD, and JPEG still image stream file 600 are recorded as JPEG still image files CCC.JPG and DDD.JPG, respectively.
These MPEG still images CCC, DDD and JPEG still images CC
Management information CCC_info and DDD_info indicating that C.JPG and DDD.JPG are of the same still images C and D are file information 3
01.

Note that the MPEG still image file is an MPEG still image file.
To take the common stream structure with video files, MP
A stream of a series of MPEG still image files in the EG still image directory 500 has a format in which a stream of MPEG still image files can be newly added to the stream if necessary. On the other hand, the stream of the JPEG still image file in the JPEG still image directory 600 has a file format which is individually independent for each still image.

FIG. 5 is a diagram showing a specific example of the file information 301 in the management file 300 in FIG.
Parts corresponding to those in FIG. 4 are denoted by the same reference numerals.

In this figure, the file information 301 in the management file 300 is shown here only for a still image file, and for still images A, B, C and D, as in FIG. And

The file information 301 includes a JPEG still image file and an MPE for each of the still images A, B, C, and D.
Management information AAA_inf indicating the association with the G still image file
o, BBB_info, CCC_info, DDD_info, and the content of the management information is, for example, management information
As shown in the example of AAA_info, an MPEG file pointer or a JPEG that is a pointer indicating the position on the DVD disc where the MPEG still image file AAA is located.
A JPEG file pointer which is a pointer indicating the position of the still image file AAA.JPG on the DVD disk, and a JPEG file name for determining the contents of the JPEG still image file (JPEG still image by a digital still camera or the like) When an image file is generated, the file name is mechanically composed of alphabets and numbers in order.When this is viewed on a personal computer, etc., an individual file that indicates what the still image file is It is convenient to name the file later). In addition, like the JPEG file name, the JPEG file size and JPEG
File attributes, JPEG file time stamps, and the like are included. In addition to the above, information related to the JPEG still image file is stored in the management file 300, and addition and deletion are performed simultaneously with the operation of the JPEG still image file, and file management on the DVD disk is performed. Easy.

FIG. 6 is a block diagram showing a main part of a first embodiment of a video recording / reproducing apparatus according to the present invention as a DVD camera, wherein 1 is a DVD camera, 2 is a video source, 3 is an encoding circuit, 3a is an MPEG encoding circuit, 3b is JPEG
The encoding circuits 4 and 4 are DVD disks, and the portions corresponding to the above-mentioned drawings are denoted by the same reference numerals and description thereof is omitted.

In FIG. 1, a DVD camera 1 has an MP
An encoding circuit 3 including an EG encoding circuit 3a and a JPEG encoding circuit 3b is provided.

When still image information is obtained from the image source 2 such as an image pickup unit and an external terminal for inputting image information while the DVD disk 4 is mounted, the still image information is supplied to the encoding circuit 3. MPEG still image information is obtained by encoding processing by the MPEG encoding circuit 3a, and JPEG still image information is obtained by encoding by the JPEG encoding circuit 3b. The encoded still image information is stored in the DVD camera 1
In this case, the image file system 100 described with reference to FIGS. 1 to 3 is constructed on the DVD 4 and an MPEG file obtained by encoding the same still image information is recorded on the DVD 4. The still image information and the JPEG still image information are referred to as an MPEG still image file and a JPEG still image file, respectively.
Are additionally recorded in the MPEG still image directory 500 and the JPEG still image directory 600. And
At the same time, as described with reference to FIG. 4, the management information indicating that the MPEG still image file to be trimmed and the JPEG still image file are encoded image information of the same still image information is the file information of the management file 300. Is added to

Similarly, every time still picture information is obtained from the video source 2, the MPEG still picture file and the J
A PEG still image file is generated and additionally recorded in the image file system 100 of the DVD disk 4.

When moving picture information is obtained from the video source 2, the moving picture information is encoded by a not-shown moving picture MPEG encoding circuit, and is stored in the not-shown MPEG moving picture directory 4 of the image file system 100 of the DVD disc 4.
00 (FIG. 1), and the management information is added to the file information of the management file 300. Note that M
The PEG encoding circuit 3a may be commonly used for encoding moving image information and still image information.

As described above, the DVD disk 4 contains
The same still image information is recorded as a JPEG still image file as well as an MPEG still image file.
It can read either a PEG still image file or a JPEG still image file.
Still image information can be reproduced not only by a VD deck (a recording / reproducing apparatus that can use a DVD disk) but also by a device such as a personal computer or a digital still camera that conforms to the JPEG standard.

Although the first embodiment is a DVD camera, it may be a DVD deck. DVD
The deck includes an encoding circuit and a decoding circuit conforming to the MPEG standard, and further includes an encoding circuit conforming to the JPEG standard for still image information, as in the configuration shown in FIG. Recording moving image information such as an input television broadcast program as an MPEG moving image file, extracting one desired field or one frame of the moving image information,
It can be recorded as an MPEG still image file or a JPEG still image file, and can reproduce an MPEG moving image file or an MPEG still image file.

FIG. 7 is a block diagram showing a main part of a video recording apparatus according to a second embodiment of the present invention as a personal computer, wherein 5 is a personal computer, 6 is a code conversion circuit, and 7 is JP.
The EG decoding circuit 8 is an MPEG encoding circuit, and portions corresponding to the above-mentioned drawings are denoted by the same reference numerals, and redundant description will be omitted. In this embodiment, the video recording device is a personal computer, but the video recording device is a JPEG such as a digital still camera.
A device having a standard may be used.

In the same figure, the personal computer 5 is provided with JPEG encoding means (not shown) for encoding the generated still image information to form JPEG still image information, similarly to the conventional personal computer. And a JPEG decoding circuit 7 and an MPEG encoding circuit 8
A JPEG decoding circuit 7 decodes the obtained JPEG still image information into original still image information, and then encodes the resulting JPEG still image information into an MPEG still image It is configured so that information can be obtained.

When JPEG still image information is created in the same manner as a conventional personal computer with the DVD disk 4 mounted, the code conversion circuit 6 converts the JPEG still image information into MPEG still image information. The JPEG still image information and the MPEG still image information obtained from the same still image
In D4, as in the first embodiment shown in FIG.
It can be additionally recorded as a PEG still image file and an MPEG still image file.

In this case, the MPEG still image information is obtained from the JPEG still image information by using the code conversion circuit 6. However, in addition to the originally provided JPEG encoding circuit, the MP still image information is obtained.
An EG encoding circuit is provided, and the created still image information is encoded by a JPEG encoding circuit as in a conventional personal computer.
The PEG still image information may be obtained, and may be encoded by an MPEG encoding circuit to obtain the MPEG still image information.

According to this embodiment, the still image information can be additionally recorded on the DVD 4 on which the still image information is recorded by the DVD camera as shown in FIG.

FIG. 8 is a diagram showing a method of additionally recording such still picture information on the DVD disk 4, and FIGS.
Parts corresponding to those in FIG. 7 are denoted by the same reference numerals.

In the same figure, assuming that a still image E is additionally recorded by a personal computer 5 on a DVD disk 4 on which still images A to D are recorded by the DVD camera shown in FIG.
When the JPEG still image information of the still image E is formed on the personal computer 5 on which the disk 4 is mounted, the JPEG still image information is transmitted to the DV.
JPE of image file system 100 on D disk 4
The JPEG image file EEE.JPG is additionally recorded as a JPEG image file EEE.JPG in the G still image directory 600.
The MPEG still image stream file 501 in the MPEG still image directory 500 of the image file system 100 is converted into MPEG still image information by the encoding circuit 8.
Then, the MPEG still image file EEE is additionally recorded so as to be continuous with the MPEG still image file DDD as the last bit stream unit 502.

At the same time, management information EEE_info for associating the JPEG still image file EEE.JPG with the MPEG still image file EEE is added to the management file 300, and the file information is rewritten.

In a conventional personal computer using a DVD disk, when editing a still image file recorded on the DVD disk, unnecessary still image files can be deleted. However, according to the DVD camera as the video recording apparatus according to the present invention shown in FIG. 6, still image information is recorded as an MPEG still image file on the DVD disk 4, and the still image information is recorded by a device such as a personal computer equipped with the JPEG standard. In order to make the image information reproducible, the same still image information is also recorded as a JPEG still image file. However, the still image file can be edited on the DVD disc 4 by a personal computer equipped with a conventional JPEG standard. , Even if you delete unnecessary still image files,
This deletion means that only the still image file compressed according to the JPEG standard provided in the personal computer, that is, only the JPEG still image file, and the MPEG still image file corresponding to the JPEG still image file remains. And the editing is incomplete.

The video recording apparatus shown in FIG. 7 enables such editing, and FIG.
The deletion of the still image information recorded on the disk 4 will be described. In FIG. 9, parts corresponding to the above-mentioned drawings are denoted by the same reference numerals, and here, the video recording apparatus will be described as a personal computer.

In FIG. 9, it is assumed that the files of the still images A to D are recorded in the image file system 100 of the DVD disk 4. Therefore, the file information 301 of the management file 300 includes the management information of these files.

FIG. 7 shows a DVD disk 4 in such a recorded state.
When editing a recorded still image file attached to the personal computer 5 having the configuration shown in (1) and want to delete the still image C as unnecessary, specify the file name of the still image C on the personal computer. And perform the operation for deletion. With this operation, the personal computer 5 transmits the still image C included in the file information 301 from the management file 300 in the image file system 100 of the DVD disc 4.
Management information 700c (the management information CCC_inf in FIGS. 4 and 5).
o) and reads M based on the management information 700c.
The MPEG still image file CCCC stored as the bit stream unit 502c is deleted from the PEG still image directory 500, and the JPEG still image file CCC_JPG stored as the bit stream unit 602c is deleted from the JPEG still image directory 600. This management information 700c is also deleted from the file information 301.

In this way, the unnecessary still image can be deleted together with the MPEG still image file and the JPEG still image file. Therefore, in addition to the still image additional recording described with reference to FIG. 8, in the embodiment shown in FIG. 7, editing with additional recording and deletion of still image information can be performed. A device such as a personal computer or a digital still camera equipped with a means for performing decoding processing conforming to the JPEG standard, and a MP camera such as a DVD camera and a DVD deck including conventional devices
It can be reproduced by a device provided with a means for performing a decoding process conforming to the EG standard.

FIG. 10 is a block diagram showing a main part of a video recording apparatus according to a third embodiment of the present invention as a personal computer, where 9 is a JPEG decoding circuit, 10 is an external device,
Reference numeral 11 denotes an MPEG encoding circuit, and portions corresponding to the above-described drawings are denoted by the same reference numerals, and redundant description will be omitted. Although this embodiment is also a personal computer, a device such as a digital still camera that encodes and decodes a still image in accordance with the JPEG standard may be used.

In the figure, a personal computer 5 has a built-in JPEG decoding circuit 9 and an MPEG encoding circuit 11.
Can be connected to an external device 10 having a built-in.

With the external device 10 connected, JPEG still image information generated similarly to a conventional personal computer is additionally recorded in the JPEG still image directory 600 of the image file system 100 of the DVD disk 4 mounted. At the same time, the image data is once decoded into the original still image information by the JPEG decoding circuit 9, supplied to the external device 10, encoded by the MPEG encoding circuit 11, taken into the personal computer 5 as MPEG still image information, and It is additionally recorded in the MPEG still image directory 500 of the image file system 100 on the disk 4. Also in this case, as described with reference to FIG. 8, management information for associating the additionally recorded JPEG image information with the MPEG still image is added to the management file 300, and the file information is rewritten.

In this case, J is executed by using the external device 10.
The MPEG still image information is obtained from the decoded still image information of the PEG still image information.
Although it has a PEG encoding circuit, an external device having a built-in MPEG encoding circuit can be connected, and the created still image information is encoded by the JPEG encoding circuit to perform JPE.
G Still picture information is obtained, and the MPEG
Encoding may be performed by an encoding circuit to obtain MPEG still image information.

In the embodiment shown in FIGS. 7 and 10, the management information indicating the relationship between the JPEG still picture information to be recorded and the MPEG still picture information is also stored in the management file 30.
0 is added to the file information.

Further, the embodiment shown in FIG. 10 is also configured so as to be capable of editing with additional recording and deletion of a still image as in the embodiment described with reference to FIGS.

FIG. 11 is a diagram showing the relationship between a video recording apparatus and a recording medium according to the present invention.

In the figure, a recording medium 4 according to the present invention, for example, a DVD disk, is capable of storing an MPEG moving image file, an MPEG still image file, and a JPEG still image file by constructing the image file system 100 described above. And can be used in the video recording / reproducing apparatus according to the present invention.

As an example of the use form, moving picture information and still picture information are stored in a DVD camera 1 or a DVD deck 12 in a DV format.
The still image file recorded on the D disk 4 is reproduced and edited by the personal computer 5 on the DVD disk 4. Of course, the personal computer 5 can reproduce the edited result itself.

In the above-described embodiment, the MPEG format and the JPEG standard have been described as examples of the compression format. However, the present invention is not limited to these, and other compression formats may be used. The present invention is applicable to a format.

[0063]

As described above, according to the present invention,
The recording medium can be used by a plurality of different devices having different information formats, and the convenience of the recording medium is improved.

Further, according to the present invention, editing involving additional recording or deletion of image information on a recording medium can be performed without impairing the above convenience.

[Brief description of the drawings]

FIG. 1 is a diagram showing a structure of an image file system constructed in an embodiment of a recording medium according to the present invention.

FIG. 2 is a diagram showing a specific example of an MPEG moving image file recorded in an MPEG moving image directory in FIG. 1;

FIG. 3 is a diagram showing a specific example of an MPEG still image file recorded in an MPEG still image directory in FIG. 1;

FIG. 4 shows an MP in the image file system shown in FIG.
FIG. 7 is a diagram schematically illustrating a specific example of file information for associating an EG still image file with a JPEG still image file.

FIG. 5 is a diagram showing a specific example of file information in a management file in FIG. 4;

FIG. 6 is a block diagram showing a main part of the first embodiment of the video recording / reproducing apparatus according to the present invention as a DVD camera.

FIG. 7 is a block diagram showing a configuration of a main part of a second embodiment of a video recording device according to the present invention as a personal computer.

FIG. 8 is a diagram illustrating a method of additionally recording still image information on a DVD disk.

FIG. 9 is a diagram illustrating a method of deleting still image information from a DVD disc.

FIG. 10 is a block diagram showing a configuration of a main part of a third embodiment of a video recording device according to the present invention as a personal computer.

FIG. 11 is a diagram showing the relationship between a video recording device and a recording medium according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 DVD camera 2 Video source 3 Encoding circuit 3a MPEG encoding circuit 3b JPEG encoding circuit 4 DVD disk 5 Personal computer 6 Code conversion circuit 7 JPEG decoding circuit 8 MPEG encoding circuit 9 JPEG decoding circuit 10 External device 11 MPEG encoding circuit Reference Signs List 100 image file system 200 root directory 300 management file 301 file information 400 MPEG moving image directory 401 MPEG moving image stream file 402 video stream unit 403 I picture (frame or intra-field coded image) 404 P picture (forward predicted coded image) ) 405 B picture (bidirectional predictive coded image) 500 MPEG still image directory 501 MPEG still image stream file 502 Video stream unit 502c Deleted video stream unit 503 Sequence header 504 GOP header 505 Stream 506 Sequence end code 600 JPEG still image directory 602 Video stream unit 602c Deleted video stream unit 700 Deleted management information

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme Court II (Reference) (72) Inventor Hiroshi Shimizu 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Digital Media Development Division, Hitachi, Ltd.

Claims (6)

[Claims] 1. A recording medium for recording at least compressed still image information, comprising: a plurality of directories each of which is set for a different compression format and in which a still image file of a corresponding compression format is recorded; And an image file system including file information including management information indicating the relationship between the still image files recorded in the directory of the image file system. A recording medium recorded as a file in a corresponding directory, wherein the still image information can be reproduced from any of the directories. 2. The recording medium according to claim 1, wherein the compression format is an MPEG standard or a JPEG standard, and the directory is a directory in which still picture information is compressed and recorded in accordance with the MPEG standard. A recording medium comprising: a first directory; and a second directory in which the same still image information is compressed and recorded according to the JPEG standard. 3. The recording medium according to claim 1, wherein the management information is information such as a pointer indicating a recording position of the still image file, a file name, a file size, and an attribute. media. 4. A video recording apparatus using a recording medium according to claim 1, 2 or 3, wherein still image information from the same video source is converted into a plurality of still image files of different compression formats. A video recording apparatus, wherein the management information recorded in the corresponding directory and associated with the still image file recorded in each of the directories is added to the file information. 5. A video recording / reproducing apparatus using a recording medium according to claim 1, 2, or 3, wherein the unnecessary information on the recording medium is designated and the deletion instruction is given based on the management information. And deleting all the still image files corresponding to the specified unnecessary still image information from all the directories, and deleting the management information for the still image files to be deleted. apparatus. 6. A video recording / reproducing apparatus using a recording medium according to claim 1, 2 or 3, wherein a format of a specific compression format among the compression formats of the still image information to be recorded on the recording medium. Capturing the still image file from the recording medium, and generating the still image file in the specific compression format, and additionally recording the generated still image file in the specific compression format in a corresponding directory of the recording medium, And converting the generated still image file of the specific compression format into all the compression formats other than the specific compression format among the compression formats of the still image information to be recorded on the recording medium. A still image file, and additionally record the still image file in the corresponding directory of the recording medium. With additional recording consuming still image file to birds, video recording and reproducing apparatus, characterized by additionally recording management information indicating an association between these still picture files on the recording medium.