JP3487779B2 - Content editing method and editing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for managing recorded contents on a large-capacity disk storage medium. The present invention relates to a recording content management technique for recording or recording a plurality of contents on a disk storage medium such as a large-capacity optical disk or a magneto-optical disk. The present invention can also be used for management of the content recorded on the disc storage medium in the cartridge when a plurality of disc storage media are stored in one cartridge.

In the following description, an example of an optical disc will be described as a disc storage medium, but the present invention is not limited to the optical disc, and the present invention can be applied to a magneto-optical disc, a magnetic disc, and other disc storage media.

[0003]

2. Description of the Related Art There is a DVD-ROM in which a video content (or music content) is recorded on a large-capacity disk storage medium. However, this DVD-ROM
Since it is a read-only configuration, it is not necessary to change the entire management information even if multiple video contents are recorded, and the user can create multiple copies across one or more disc storage media. No video content is recorded.

On the other hand, there has been proposed a large-capacity optical disc capable of recording a plurality of video contents on one or a plurality of disc storage media.

Various compression coding techniques have been developed in order to efficiently record images or sounds. The JPEG image coding method and the MPEG2 image coding method are used as the still image compression coding method and the moving image compression coding method, and the MPEG audio coding method and the Dolby method are used as the audio signal compression coding method. The AC method or the like is used.

[0006]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention When a large-capacity optical disk that allows a user (user) to record a plurality of video contents on a single disk, such as a video tape, one disk is used. It is possible to record a plurality of video contents in it. At this time, the user can recognize the title and the content of the recorded video content (or music content) as an index at a glance, and the management becomes complicated if there is no management information to be managed uniformly.

Further, in a large-capacity optical disk that can be recorded and reproduced by the user himself, the user himself can perform erasing and editing like a video tape. For example,
When recording video content, it may be desirable to cut only the time zone of CM. In the conventional video tape, in order to erase the CM time zone, it is necessary to perform re-recording on another video tape except the CM time zone.

On the other hand, since the disk storage medium can be randomly accessed, the CM time zone is deleted.
By editing the content so that it jumps to the start position of the continuation screen, the playback operation can be performed without making the user feel that the CM time zone has been cut. is there. However, there is no suggestion as to how the file management information for such editing is configured and how to edit it.

[0009] Further, the user himself / herself can edit the contents etc. to replace the images and music, and not only deletion but also combining is possible. For example, it is possible to perform an operation of completely replacing the music part of the background of the image. There is no suggestion as to how to manage the edited content when performing such editing.

Further, it is conceivable to record / reproduce a plurality of disc storage media in one cartridge and record / reproduce in a cartridge unit, instead of recording / reproducing in a unit of one disc storage medium. Further, in consideration of recording a plurality of contents, the cartridge unit is easier to manage. However, there is no proposal for a method of managing a large number of contents recorded in a plurality of disc storage media in one cartridge.

Further, there is no suggestion as to what kind of management should be performed when a plurality of disk storage media are stored in a cartridge and contents are recorded over the plurality of disk storage media.

The present invention has been made against such a background, and a user records and manages titles indicating the contents of a plurality of contents recorded on one or a plurality of disk storage media. An object of the present invention is to provide a disc storage medium and a title management method which can be performed. It is another object of the present invention to provide a disk storage medium that allows a user to perform editing such as erasing and combining on recorded / recorded content, and a management method thereof. Another object of the present invention is to provide a file management method when a user edits content. Another object of the present invention is to propose a recording / reproducing apparatus and a recording / reproducing method using these management methods and disk storage media.

In particular, it is an object of the present invention to provide a recording / reproducing apparatus and a recording / reproducing method capable of easily reproducing a fast-forward image for assisting editing work or searching for desired contents.

[0014]

According to the present invention, as file structure of data to be recorded on a disk storage medium, management information is collectively recorded as file management information in a fixed area secured in advance. The file management information includes a recorded content title, an object type of attribute information indicating what kind of content it is, a title management file such as data recording start date / time information, recording information such as end information, and the like. , A program management file (program playback chain, hereinafter referred to as PPC file) that is used to edit the recorded data file and that represents the connection relationship of the edited data files, data recording start date and time information, Information related to recording such as end information, a correlation management file that indicates the reference relationship between the program management file that refers to the data file and the data file, and a last play file that indicates position information (so-called bookmark function) in the last accessed content, etc. Is stored.

Here, the outline information includes character information representing a summary of contents, a thumbnail image which is a reduced image of a frame of an input image, and the like, but in the present invention, the outline information will be described as thumbnail data. . The image compression encoding method uses MPEG2, and a predetermined processing unit including a plurality of frames is a GOP unit (G
roup Of Picture), intra-frame coded image is I-Pictur
Explain as e.

The image / sound is recorded as an image / sound file, and the image / sound file includes a compression-encoded image / sound data file (Multi-media Video File, hereinafter referred to as MVF file) and this image / sound data. M
Map file for managing VF files (MA
P) and.

This map file is an ECC from the start position of the MVF file compression-coded for each GOP unit.
(Error Correction Code) Block address, target GO
It has the number of P ECC blocks, the number of I-Picture ECC blocks in the target GOP, and the position information of the start frame and the end frame for reproduction in the target GOP. With this map file, it is possible to manage compression-coded image / audio data in GOP units. Also, the target GOP
ECC from the beginning position of MVF file of audio data in
Having the information of the block address and the number of ECC blocks enables post-record editing of audio data.

When the disc is formatted, a file management information area is created at the beginning of the disc. Since the file management information includes items that can be changed by the user by creating or editing, a certain volume is secured as the file management information area.

At this time, a fast-forward image can be created by paying attention to an I-Picture that is included in each GOP unit and is not image-compressed, and extracting and reproducing only the I-Picture. To extract the I-Picture, I
-It is recommended to record the position information of the Picture and read the I-Picture according to this position information.

The I-Picture is used as the basis for image compression of other frames in image compression, and the I-Picture itself is a single uncompressed frame image.
There is nothing missing from the viewer as image information even if only the cture is played back fast forward.

[0021]

[0022]

[0023]

[0024]

[0025]

[0026]

[0027]

[0028]

[0029]

A first aspect of the present invention is a disc reproducing method, wherein when a disc storage medium is inserted into a disc reproducing apparatus, file management information recorded in a specific area of the disc storage medium is read. This is a disc playback method.

Here, the feature of the present invention is that the position information of the intra-frame coded image and the number of blocks of the intra-frame coded image are recorded in a predetermined processing unit including a plurality of frames, and according to the operation input. The intra-frame coded image corresponding to a desired content is sequentially extracted and reproduced for each of the predetermined processing units in a predetermined order.

A second aspect of the present invention is a disc reproducing apparatus including means for reading file management information recorded in a specific area of the disc storage medium when the disc storage medium is inserted into the disc reproducing apparatus. Is.

Here, a feature of the present invention is that a means for recording the position information of the intra-frame coded image and the number of blocks of the intra-frame coded image in a predetermined processing unit including a plurality of frames is provided. There is provided a means for sequentially extracting and reproducing the intra-frame coded image corresponding to a desired content for each of the predetermined processing units in a predetermined order according to an operation input.

A third aspect of the present invention is to extract position information of a predetermined processing unit including a plurality of compression-encoded frames as map information when the content is recorded by performing the compression encoding on a disk storage medium. A recording method of a disk storage medium provided with a file management information area recorded in a specific area different from the content data recording area.

Here, the feature of the present invention is that the position information and the number of blocks of the intra-frame coded image of the predetermined processing unit are extracted as the map information.

The content may be compression-encoded by MPEG2, a predetermined processing unit including the frame may be a GOP unit, and the intra-frame encoded image may be an I-Picture.

A fourth aspect of the present invention is to extract position information of a predetermined processing unit including a plurality of compression-encoded frames as map information when the content is recorded by performing the compression encoding on a disk storage medium. A recording device of a disk storage medium provided with a file management information area recorded in a specific area different from the content data recording area.

Here, the feature of the present invention resides in that the map information is provided with means for extracting the position information and the number of blocks of the intra-frame coded image of the predetermined processing unit.

The content may be compression-encoded by MPEG2, a predetermined processing unit including the plurality of frames may be a GOP unit, and the intra-frame encoded image may be an I-Picture.

A fifth aspect of the present invention is to record the position information of a predetermined processing unit including a plurality of frames of compression-encoded image and audio data on a disk storage medium as a map file, and record the recorded image and audio. A data file is edited in the predetermined processing unit, stored in a program management file so as to indicate the position of the image data and audio data that are the result of this editing, and this program management file is managed by the disk storage medium. This is a method of editing an image stored in a storage area of file management information.

Here, a feature of the present invention is that the position information and the number of blocks of the intra-frame coded image of the predetermined processing unit of the compression coding of the recorded content are recorded in the disk storage medium as a map file. A fast-forward image is created by sequentially extracting and reproducing intra-frame coded images for each of the predetermined processing units in a predetermined order, and editing is performed with reference to the fast-forward image.

The compression encoding is MPEG2, and the predetermined processing unit including the plurality of frames is GOP.
It is a unit, and the intra-frame coded image is an I-Picture.
Can be

A sixth aspect of the present invention is a means for compressing and encoding recorded contents in a disk storage medium, a means for recording encoded image and audio data as a data file for each content, and a recorded image. And means for creating a map file of position information of audio data, means for reading and decoding the recorded data file, memory means for storing a program management file for managing the stream of data as file management information, An input unit for inputting an editing instruction, and the program management file has a predetermined process including a plurality of frames of the data file as a result of deleting or combining the data files by an operation input by the input unit. The recording / editing device is a disk storage medium that is stored in units.

Here, the feature of the present invention resides in that a means is provided for extracting and reproducing the recorded intra-frame coded images in a predetermined order according to an operation input.

The contents may be compression-encoded according to MPEG2, a predetermined processing unit including the plurality of frames may be a GOP unit, and the intra-frame encoded image may be an I-Picture.

[0046]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a file structure provided in a disk storage medium showing an embodiment of the present invention. FIG. 2 is a diagram showing the structure of the root directory. FIG. 3 is a diagram showing the structure of the management file directory. FIG. 4 is a diagram showing the structure of the video file directory. In the following embodiments of the present invention, the data recorded on the disk storage medium is MPEG
It is assumed that the data is compression-encoded using the two-image encoding method and the MPEG audio encoding method.

The files recorded in the root directory 1 and the management file directory 2 shown in FIG. 1 correspond to the file management information for managing the recorded contents. This file management information is provided in a specific area of the disk storage medium. This specific area is reserved in advance as an area for recording file management information, and the capacity of the file management information varies depending on the user's recording and editing, so a certain capacity is maintained at the time of disk initialization. Reserved in advance.

The file management information is divided into a root directory 1 and a management file directory 2.
The root directory 1 is a title management file 11,
Thumbnail file 12, MVF correlation management file 1
3 and the last play file 14. The title management file 11 is a file for managing contents of the entire disc or cartridge.
In the title management file 11, as shown in FIG. 2, the volume name of the disc, the content title, the number of PPC files representing the number of contents in the disc, position information of each PPC file, and object attribute information, Information such as recording date and time, recording time, image data recording mode, audio data recording mode, and thumbnail index is recorded in the title management file 11.
Stored and managed in.

Here, the object attribute information is M
PEG2 video, MPEG audio, Dolby AC audio, J
This is information indicating the type of PEG still image, uncompressed still image data, and the like, and this is for instructing what kind of reproduction processing is performed when reproducing the content.

The index of the thumbnail is
This is for instructing the data position in the thumbnail file 12.

As shown in FIG. 2, the thumbnail file 12 is used to record the contents of each content together with the content title when the disc storage medium is inserted into the reproducing apparatus, and has about 100 pixels × 75 lines. Record a reduced still image.

In this embodiment, the title management file 11
And the thumbnail file 12 are separated, and thumbnails of the respective contents are displayed by using the thumbnail index in the title management file 11 as the thumbnail file 1.
It is supposed to be stored in 2. This is because the thumbnail data has a larger recording capacity than the PPC file,
When reproducing with an inexpensive recording / reproducing apparatus that does not have sufficient memory, by reading the title information recorded in the PPC file without reading the thumbnail file 12, the user can read the content information recorded in the disk storage medium. Can be notified, and compatibility with recording / playback devices of different specifications can be maintained. When the specifications do not have a plurality of types as described above, the thumbnail file 12 can be stored in the title management file 11 and managed.

As shown in FIG. 2, the MVF correlation management file 13 is a PP for controlling reproduction of recorded contents.
It is a file for adjusting the conflict of the video data recorded in the video file directory 3 referred to by the C file, and records whether each PPC file refers to the MVF file 31 in the video file directory 3. This is because a PPC file that refers to each MVF file is recorded, and when editing content, for example, when trying to erase an entire MVF file, refer to the MVF file that is about to be erased. If there is a PPC file that exists, the user is informed that the PPC file cannot be deleted, and the GOP information of the PPC file that needs to be changed by deleting the MVF is reconstructed.

As shown in FIG. 2, the last play file 14 fulfills a so-called bookmark function, and is composed of the PPC file name last reproduced by the user and the last reproduced GOP position information of the PPC file, or a cartridge. In this case, information such as the disc number of the last played PPC file is recorded. This is because in the case of a recording / playback device that uses a tape storage medium, if the user stops the playback process or takes out the tape storage medium from the device without rewinding after the recording process and inserts it again into the device, While the storage medium stops at the position where it stopped last time, the disk storage medium cannot detect the physical head stop position, so the position of the last played content should be recorded in the last play file 14. Then, like a recording / playback device using a tape storage medium,
The function to play from the continuation of the previous time can be realized.

The last play file 14 cannot be used when the user has set a recording prevention notch to prevent erroneous recording, since recording of data on the disk storage medium is prohibited. By storing the unique ID of the disk storage medium and the information of the last play file 14 in a nonvolatile memory inside the recording / reproducing apparatus, the same recording / reproducing apparatus can realize the same function as the last play file 14. You can

When the disk storage medium is stored in the cartridge, the cartridge main body is provided with a non-volatile memory and the information of the last play file 14 is stored to realize the same function as the last play file 14. be able to.

Next, the files of the management file directory 2 will be described. The management file directory is P
It consists of a PC file 21, a thumbnail file 22, and a MAP file 32, which may be placed on the same disk storage medium as the root directory, or on each disk storage medium.

The PPC file 21 manages a content stream and is used for editing and reproducing recorded video content and the like. This PPC file manages the target MVF file in GOP units.
As shown in, the file index of the target MVF file and the ECC block address from the head position of the MVF file that is the position information of the target GOP for specifying the target GOP, the number of ECC blocks of the target GOP, and the target GOP are included in the target GOP. The number of I-Picture ECC blocks, the start and end frame positions of the target GOP,
The start offset address of the audio data included in the target GOP and the number of ECC blocks are stored. As a result, it is possible to access the MVF file in which the target content is stored based on the information of the PPC file and reproduce the content.

As shown in FIG. 3, the thumbnail file 22 stores a thumbnail image of an MVF file corresponding to a PPC file as a still image, and has a file structure of the thumbnail file 12 of the root directory 1.
Is the same as.

The MAP file 32 is the MVF file 3
This is a file for managing 1 and, as shown in FIG. 4, the total number of GOPs of the MVF file 31, the G of each.
The ECC block address from the head position of the MVF file of the target GOP, which represents the management information of the OP, the number of ECC blocks of the target GOP, and the E of the I-Picture of the target GOP.
Information on the number of CC blocks, the reproduction start frame and the end frame position of the target GOP, is stored. For example, GOP
If the number of image frames is 15, the start frame position is 1, and the end frame position is 15. Further, as to the audio information, the start position information of the audio data in the target GOP and the number of ECC blocks are also stored. This one MAP file 32 is one MVF file 3
It is provided for No. 1 and is automatically created when the MVF file 31 is created (recorded). That is, when recording a certain content, the MVF file 3
When 1 is created, the management information for each GOP is automatically taken in and the MAP file 32 is created.

Next, the video file directory 3 will be described.

As shown in FIG. 4, the MVF file 31 is a file in which video or audio data of each recorded content is stored. For example, the video / audio signal is MPE.
The data compressed by G2 are aligned (divided) and recorded in units of GOP units of video data and audio data in units of ECC blocks. Here, the number of frames making up one GOP is the number of frames that are broadcast in Japan, the United States, etc.
In the case of the C method, the number of image frames per second is 29.9.
Since seven sheets are used, 15 is often used, but the number is not particularly limited. In particular, in the case of having a variable GOP structure, the number of frames forming a GOP adaptively changes due to a scene change or the like. Video data and audio data are reproduced by reading compression-coded data from this MVF file and performing a decoding process.

FIG. 16 shows an example of the data arrangement of the compressed data used in the DVD-ROM. In the figure, V represents compressed image data and A represents compressed audio data. Data is recorded in sector units (generally 2 KB). On the other hand, the MVF file of the present invention is G
In the OP data, the compressed audio data is arranged in ECC block units after the compressed image data.

For example, when the audio data is replaced, the format used in the DVD-ROM does not have the management information of the audio data position, and the data arrangement has no regularity. Since all the compressed data are sequentially read from the optical disk 50 and a new audio data to be replaced is recorded at the sector position determined as the audio data portion, the audio data cannot be easily replaced. FIG. 17 is a diagram showing an example of the data arrangement of the compressed data of the present invention. On the other hand, as shown in FIG. 17, M having the data arrangement of the present invention is used.
The VF file has an advantage that the audio data can be replaced without reading the audio data from the optical disc because the MAP file 32 manages the audio data position and the data is arranged in the ECC block unit. There is.

Consider the case of adding audio data, for example, recording in Japanese 2ch and then recording in English 2ch.
Here, it is assumed that the audio data area to be added in advance is secured at the time of recording. In the DVD-ROM format, as in the case of replacing the audio data described above, the audio data part cannot be identified unless all the necessary compressed data are read in order. On the other hand, according to the data arrangement of the present invention, only the audio data portion is read from the optical disc in accordance with the MAP file and the additional audio is recorded in the reserved area, so that the audio data can be easily added.

Since the MAP file 32 has the start address of the GOP and the number of I-Picture ECC blocks in the GOP, the file address can be known, but the I-Picture area required for the quick preview is known. Therefore, it is necessary to decode the compressed data to detect the end point of the I-Picture data or to detect the header of the compressed data. On the other hand, in the present invention, I-Pict
In addition to the start address of ure (synonymous with the start address of GOP), the MAP that manages GOP information with the number of ECC blocks
Since it is stored in the file 32, address jump, data reading of the required number of blocks, and decoding processing can be performed continuously without performing a decoder or header detection. It is possible to perform a faster quick preview.

FIG. 5 shows that when one cartridge includes a plurality of disk storage media and the disk storage media in the cartridge cannot be taken out by the user,
6 shows an example of file arrangement when contents are recorded across a plurality of disc storage media. Content # 1 is MVF file # 1 on disk # 1.
, The content # 2 is recorded as the MVF file # 2, and half of the content # 3 is the MVF file # 3-.
1 shows that the other half of the content # 3 is recorded as MVF file # 3-2 on the disc # 2.

In this case, the file management information of the root directory file 1 is stored in the specific area at the head of the disc # 1, and the contents management of the entire cartridge is performed by using these file management information to disc the disc # 1. , # 2, the respective contents recorded in # 2 are managed by using the management file directory 2 placed for each disc. As described above, it is convenient for the user to perform reproduction or recording in a form in which a plurality of disc storage media are stored in one cartridge, and it is possible to store a plurality of disc storage media in one cartridge. In order to manage a large number of recorded contents, when the cartridge is inserted into the recording / reproducing apparatus, the file management information placed in the root directory is recorded in the disc storage medium loaded first, so that a plurality of discs can be stored. The user can know the contents of the entire cartridge faster than recording the management information of the root directory individually on the medium. As described in detail above, the present invention is capable of reproducing a large number of contents recorded on a plurality of disc storage media.
The utility value is also large in that it can be collectively managed by the file management information provided on a predetermined one disk storage medium.

Next, the operation of the present invention will be described with reference to FIG. 6 which shows a structural example of a recording / reproducing apparatus using a large capacity optical disk.

This recording / reproducing apparatus comprises an optical disc 50,
An optical disc device 40, an analog input I / F 52 that performs A / D conversion of image / audio data input from a tuner or other recording / reproducing device, and MPEG2 that performs compression encoding of image data using the MPEG2 encoding method. An image encoder 41, an MPEG audio encoder 53 for compressing and encoding audio data using the MPEG audio encoding method, a multiplexer 48 for composing compressed image / audio data into one stream, A disk drive I / F 51 that inputs and outputs multiplexed data and management file data to and from the optical disk device 40, a separator 49 that separates a compressed image / audio stream, and an M that decodes the compressed image data.
A PEG2 image decoder 42, an MPEG audio decoder 54 for decoding compressed audio data, and an analog output I / F 55 for D / A converting the decoded image / audio data.
And a display device 44 for outputting image data
An audio output device 43 that outputs audio data, a control unit 45 that controls the entire recording / reproducing device, a memory unit 46 that stores a control program, file management information, and the like, and an instruction for editing and reproducing, etc. The operation unit 47 is provided.

Here, the multiplexer 48 rearranges the compressed image data and audio data for each 1 GOP so that the image data and the audio data are aligned in ECC block units, and the disk drive I A memory unit in which the control unit 45 manages the number of ECC blocks for each GOP, the number of I-Picture ECC blocks, the audio data ECC offset address, and the audio data ECC blocks at the same time as outputting to the / F51 as a stream. Output to 46. The control unit 45 receives management information for each GOP from the multiplexer 48, performs processing for MAP file information, and updates the memory unit 46. When the recording operation is completed, the MAP file 32 is output to the management file directory 2. Disk drive I / F51
Is connected to the optical disk device 40, the MPEG video / audio stream bus, and the control bus, and has a buffer memory inside to smoothly perform data and control. The recording / reproducing apparatus shown in FIG. 6 is an example, and can be realized regardless of the configuration of the recording / reproducing apparatus of the present invention.

Next, FIG. 7 shows the overall operation of the recording / reproducing apparatus.
Will be described with reference to. FIG. 7 is a flowchart showing the overall operation of the recording / reproducing apparatus of the present invention. When the optical disc 50 is inserted into the optical disc device 40, the optical disc device 40 determines whether or not the optical disc 50 is a new optical disc, and if it is a new optical disc, it is initialized.
The areas of the root directory 1 and the management file directory 2 shown in FIG. 1 are secured. If it is not a new optical disc, the title management file 11, the thumbnail file 12, and the last play file 14 are read out and stored in the memory section 46, and the main menu is displayed on the display unit 44.

On the main menu, if the optical disc 50 is not a new optical disc, the content titles already recorded and the thumbnails corresponding thereto are displayed.
Also, when the last end time read from the last play file 14 is reproduction, the reproduction end position is displayed, and when the last end time is recording, the recording start position is displayed. Further, information on the recordable time of the optical disc is also displayed.

As a result, the recording / reproducing apparatus is operated by the operation unit 47.
You will be ready to accept instructions from. Therefore, each operation is started according to each input of the reproduction instruction, the editing instruction, and the recording instruction from the operation unit 47. When an instruction to take out the optical disc 50 is input from the operation unit 47, the optical disc 50 is taken out.

Next, the recording operation will be described.

At the time of recording, the recording start date and time information is automatically recorded in the title management file 11 of the root directory 1 based on the information from the clock mechanism built in the apparatus, and the recording time length information is automatically recorded at the recording end. As the information recorded at this time, the recording date, recording time, recording time, and recording mode information are stored in the title management file 11. In addition, a title can be input as character information for each content so that the user can easily identify the content.
The title is an auxiliary information EPG (Ele
Decoded data of ctric Program Guide) can be described automatically. Also, the title management file 11
When a plurality of disc storage media are stored in one cartridge for management, the number of disc storage media in the cartridge and an identification ID for identifying each disc storage medium
Etc. are stored.

In addition, although the first image is automatically recorded as a thumbnail image in the thumbnail file 12 of the root directory 1 when the recording of the content is started, the user can replace it with an arbitrary image after recording the content. is there.

In the video file directory 3, when recording video contents, the image data is MPEG2.
The audio data is subjected to compression encoding, and MPEG audio encoding is applied to the MVF file 31 as a GOP unit stream.
Are recorded while being divided in units of ECC blocks. Here, the streams in the GOP are arranged in order of compressed image data and compressed audio data. In addition, the size of the ECC block is generally about 32 KB, but the effect does not change in other units.

At this time, the MAP file 32 for managing the MVF file 31 in GOP units is the MVF file 3
Based on 1, the ECC block address from the MVF file start position of the target GOP in units of GOP, the target GOP
ECC block number, E of I-Picture in the target GOP
The file management directory includes the number of CC blocks, the start frame position and the end frame position in the target GOP, the offset address from the ECC block address of the target GOP of the compressed audio data, and the ECC block number of the compressed audio data in the target GOP as audio information. It is recorded in 2.

Here, the ECC block offset address of the compressed audio data has the same function even at the address from the head position of the MVF file, but the memory amount required for storage becomes larger than that at the offset address.

When the recording operation is completed, the generated MAP
The PPC file 21 having the same content as the file 31 is generated in the management file directory 2. This is because the MAP file exists to manage the MVF file for editing and deleting, whereas the PPC file allows the user to create a table of contents at any position after recording the content by using the thumbnail. This is because it can be edited. The editing work will be described later.

FIG. 8 is a flow chart showing the recording operation. The recording operation is started according to the recording instruction input from the operation unit 47. First, a reduced image of the first image at the start of the content is generated as thumbnail data and stored in the memory unit 46. Then, MAP header data is generated in the MAP file 32 of the video file directory 3. The MAP header data records information under what conditions the MVF file was encoded. As the header data, the maximum coding rate, GO
The P structure and the horizontal / vertical resolution of the input image. The image data is generated by using the MPEG2 image encoder 41, and the audio data is generated by using the MPEG audio encoder 53. The multiplexer 48 sequentially compresses the compressed image data and the compressed audio data for each GOP in ECC block units. A stream is generated by and is recorded in the MVF file 31 as MPEG data. MA with recording MPEG data for each GOP
Update P data. If there is a free area on the optical disc 50, this operation is performed until a stop instruction is input from the operation unit 47. When the optical disk 50 runs out of free space or when a stop instruction is input from the operation unit 47, the MAP file 32 is saved, and the PPC file 21 having the same contents as the MAP file 32 is saved. Further, the thumbnail file 12 is updated / saved using the thumbnail data generated at the start of recording, the recorded content name and the recording start position are saved in the last play file 14, and finally, the title management file 1
1 is updated / saved.

Next, the reproducing operation of the recorded contents will be described.

In this embodiment, since a plurality of video contents are recorded on one disc storage medium, they are stored on one disc as MVF file # 1 and MVF file # 2.

After the optical disk (or cartridge) is inserted into the reproducing apparatus, the user selects a content and gives a reproduction instruction, and the PPC file 21 corresponding to the specified content is stored in the management file directory 2 and the specified content is read. If there is a thumbnail file 22 corresponding to, the thumbnail file 22 is read from the management file directory 2 and stored in the memory unit 46. In addition, the MVF file 31 referred to by the PPC file 21
The MAP file 32 corresponding to is stored in the read memory unit 46, the GOP information is reconstructed in accordance with the GOP reproduction order specified by the PPC file 21, and the data of the MVF file 31 is read according to the GOP information.
The separator 49 separates the compressed image / audio data, the compressed image data is decoded using the MPEG2 image decoder 42, and the compressed audio data is decoded using the MPEG audio decoder 54 and output. Here, when the thumbnail file 22 created by the user by the editing operation exists, the reproduction start can be performed from an arbitrary GOP position by using the thumbnail data of the edited content and the GOP position specified by the thumbnail data. It is possible.

As a reproducing method equivalent to a sequential medium such as a video tape, a MAP file 32
Are arranged in order of recording date and time, GOP information is rearranged in the disc or in all the discs in the cartridge, and reproduction is performed in the order of oldest recording date and time. This allows the user to sequentially view all the contents on the disc without specifying the contents.

FIG. 9 is a flow chart showing the reproducing operation. The content to be reproduced is selected from the operation unit 47, and the reproducing operation is started according to the reproduction instruction input. When selecting the content to be played back, the information read from the last play file 14 may be used to inform the user of the previous playback end position, or to inform the information of the content which has been recorded but which has not been played back. it can.

When the reproducing operation is started, the PPC file 21 of the selected content is read from the management file directory 2 of the optical disc 50 and expanded in the memory section 46. In addition, the MAP referred to by the PPC file 21
The file 32 is read out, and according to the editing program of the PPC file 21, the reference MVF file name for each GOP, the ECC block address, the number of ECC blocks, GO
The above-mentioned information such as the number of ECC blocks of the I-Picture in P is expanded in the memory unit 46. According to the GOP information, the compressed data is read from the optical disc 50, the image / audio data is decoded, and the content is reproduced. Here, when a stop instruction is input from the operation unit 47, a manual stop process is executed and the last play file 14 is updated. Further, even when the stop instruction is not input from the operation unit 47, when the content ends, the program stop processing is executed and the last play file 14 is updated.

In the case of the reproduction process from the arbitrary GOP position using the thumbnail file 22 described above, after the MAP file is expanded, the EC specified by the specified GOP position is displayed.
A jump is made to the C block address, and the reading and reproducing process of the MVF file 31 is started.

Next, the operation of editing the recorded content will be described.

The GO of the PPC file 21 is used for the editing operation.
There are two types of editing methods, that is, a method of editing only the P information and a method of partially deleting the MVF file 31 and reconstructing the information of the MAP file 32.

First, a method of editing only the GOP information of the PPC file 21 will be described.

Of the recorded contents, a portion unnecessary for the user, for example, when a user wants to skip and reproduce the CM portion, the unnecessary frame portion is designated by changing the GOP information of the PPC file 21. Playback can be performed by skipping. That is, the reproduction start frame position and the reproduction stop frame position information in the GOP in the PPC file 21 are rewritten, and the MPEG image encoder decodes the compressed image data using these start / stop frame position information. At this time, the display 44 is instructed whether to output the decoded image data.

At this time, the editing operation is to reproduce the content to be edited. For example, when the image to be cut starts, the operation key for instructing the cut is operated, and when the image to be reproduced starts, the cut operation is performed. Instruct the end of. By this instruction input, unnecessary parts are deleted from the PPC file 21 and the GOP position information is changed.

In addition, when connecting, the MV to be connected
F file playback stop frame position and the other MV
By specifying the reproduction start frame position of the F file and reconstructing the GOP information in the PPC file, the image data can be continuously reproduced without actually combining the image data.

As an example, a CM cut example is shown in FIG.
0, FIG. 11, and FIG. 12 will be described. M shown in FIG.
An example of cutting the CM portion for the VF file 31 will be described. In the PPC file 21, as shown in FIG. 11, the ECC from the start position of the MVF file, respectively.
Block address, number of GOP ECC blocks, GOP
Number of I-Picture ECC blocks in GOP, start frame position in GOP, end frame position, and E of compressed audio data
The CC block address and the number of ECC blocks of compressed audio data are stored as GOP information.
0 GOP is 13 ECC from the 292 ECC block
I-Picture consists of 3EC blocks
It is composed of C blocks and reproduces the first to fifteenth frames. Also, since the offset address of the audio data is 12, the E on the actual MVF file is
CC block address is 292 + 12 = 304 ECC
It is composed of 1 ECC block from the block.

As shown in FIGS. 11 and 12, the tenth
When deleting the CMs from the 5th frame of the GOP to the 12th frame of the 35th GOP, change the end frame position of the 10th GOP of the PPC file 21 from 15 to 4,
The information from the 11th GOP to the 34th GOP is deleted, and the start frame position of the 35th GOP is changed from 1 to 13. By changing this PPC file 21, MPEG2
After starting the reproduction of the 10th GOP, the image decoder 42 outputs to the display unit 44 from the first frame to the fourth frame, and then from the 13th frame of the 35th frame to the display unit 4
The reproduced image is output to 4.

The erasing of the image portion in the editing of the image / sound data includes erasing in GOP units and erasing in frame units. When the GOP is composed of, for example, 15 frames, the image / audio data can be deleted in units of 15 frames, and the MVF file 31 is deleted in units of GOP. When erasing in frame units, since the MVF file 31 stores image data generated by the MPEG2 image coding method, simple image data cannot be erased in 1 frame units. By rewriting the position and end frame position information, a function equivalent to erasing is realized. FIG. 13 shows an example of the structure of a GOP. The I-Picture of the intra-frame coded image is I, the P-Picture of the forward prediction image is P, and the B-Picture of the bidirectional prediction image is B.
And the frame number in the GOP is represented by a subscript (for example, P4 means P-Picture of the fourth frame in the GOP). If you try to delete the 9th to 12th frames of this GOP, B7
And P12 needs P10 to play,
Since it cannot be deleted, when deleting a frame to be edited from MVF data, the target GOP must be reproduced and re-encoded, which complicates the process.
In the present embodiment, erasing in frame units does not actually delete data, but designates the reproduction start frame position and the end frame position on the MAP file, so that unnecessary frames are not displayed during reproduction in MPEG2. By operating the image decoder, the user can view the same content as the content deleted in frame units.

Next, the case of using the MVF correlation management file (LNK file) 13 will be described. The LNK file 13 is for managing the competition of the PPC file 21 that refers to the MVF file 31 to be deleted when performing an editing operation including the entire deletion and the partial deletion of the MVF file 31. As a structure of the LNK file 13, a PPC file name corresponding to a certain MVF file name and a GOP position referred to by the MVF are stored.
Here, in order to simplify the conflict management, it is possible to perform the conflict management only with the PPC file name corresponding to the MVF file name.

For example, when a certain MVF file 31 is referenced by two PPC files 21, one PP
When attempting to delete the MVF file 31 using the C file 21, by referring to the LNF file 13, it can be seen that the MVF file 31 is referenced by another PPC file 21. Therefore, MVF
If the file is deleted, another PPC file will be inconsistent. In order to avoid this, there are a method in which the user manually resolves the conflict of the MVF file and a method in which the recording / editing apparatus automatically resolves the conflict.

When the user manually resolves the conflict, M
By displaying to the user that the VF file 31 cannot be deleted and the user deletes the reference part of the MVF file from another PPC file,
The MVF file 31 to be edited can be deleted and combined.

PP in which the recording / editing apparatus refers to the MVF file to be edited from the LNF file
If the C file exists, the user is notified that another PPC file refers to the MVF file to be edited. When the user continues the editing operation and partially erases the MVF file, the PPC file that referred to the MVF file before editing refers to an image frame different from the content intended by the user. Therefore, if the referenced GOP data does not exist in the MVF file,
When the target GOP area is deleted from the PPC file and the referenced GOP data exists, but there is a change in the GOP number, that is, the G after the deleted GOP.
When referring to the OP address, the reference GOP address number is reassigned based on the edited information to avoid the conflict.

Further, in the cartridge, since the PPC file 21 exists in each disk storage medium in the cartridge, it is necessary to perform the competition inspection of the PPC files 21 of all the disks in order to manage the competition during the editing operation. While high-speed editing operation becomes difficult, by using the LNK file 13, it is possible to manage the contention of a large number of contents recorded on the disc or the cartridge, so that the editing work can be performed at high speed and safely. it can.

FIG. 14 shows an example of erasing an MVF file in GOP units. Tenth of MVF file
It shows that the 24th GOP is deleted from the GOP and the image data portion indicated by A1 and the image data portion indicated by A2 are processed by the editing operation. At this time, PP
C file # 2 is the 55th MVF file before the editing operation
If the GOP refers to the 59th GOP, the area from the 10th GOP to the 24th GOP is deleted after the editing operation, so that the GOP position of the MVF file originally referred to by the PPC file # 2 is from the 40th GOP. become.

In the recording / editing device that automatically performs conflict avoidance, since the MVF file position referred to by the PPC file # 2 is behind the deleted area, the original reference address 55 and the deleted GOP are deleted. Since the area is 15 GOP, the reference start GOP address is 55 to 40.
become. Further, the reference end GOP is similarly changed from 59 to 44 GOP.

As described above, when performing an editing operation including area deletion, if there is a PPC file that refers to the MVF file to be edited, there is a problem that the referred GOP position is displaced, so the LNK file Can be used to manage so that a logical number shift does not occur.

FIG. 15 is a flow chart showing the editing operation. The editing operation is started according to the editing instruction input from the operation unit 47. When the content desired to be edited is selected, the corresponding PPC file 21 and MAP file 32 are read from the optical disc 50 into the memory unit 46 via the optical disc device 40, and the reproducing operation is started.

Here, at the position of the image data or audio data that the user wants to insert at the editing point, this is selected and cut-in is performed. Start G after cutting in
A thumbnail image after the OP position is extracted and the cut-in is performed is generated from the reproduced image. Furthermore, if there is image data and / or audio data that the user wants to delete from the editing point, this is selected and cutout is performed. End G after cutting in and cutting out in this way
Extract the OP position. Extracted start GOP and end GO
The PPC file 21 is newly created or updated according to the P position. If there are other editing points that you want to edit, perform the same editing. When saving the edited results, the MAP file 32 is updated, the PPC file 21 and the thumbnail file 22 are created or updated, and the edited results are saved in the optical disc 50.
1. Update the LNK file 13 and save it on the optical disc 50.

FIG. 18 is a diagram showing the structure of the GOP of the present invention. FIG. 18 is an example in which the I-Picture is arranged at the head of the GOP. The position of the I-Picture is not limited to the beginning, but the I-Pi is placed at the same position in each GOP.
By arranging the cture, the position information of the I-Picture within each GOP can be omitted as the information of the MAP file 32.

FIG. 19 is a diagram showing the format of the MAP file 32. As shown in FIG. 19, the GOP shown in FIG.
The configuration is recorded in the MAP file 32. First, a system header is provided, and the configurations of GOP1, GOP2, and GOP3 are recorded. Specifically, the ECC block address, the ECC block number, and the I-Picture block number are recorded. For example, in the case of GOP1 shown in FIG. 18, EC
C block address: 1, ECC block number: 10, I
-Picture block count: 2, ECC if GOP2
Block address: 11, ECC block number: 10, I
-Picture block count: 3, ECC if GOP3
Block address: 21, ECC block number: 11, I
-Picture blocks: Recorded as 2.

FIG. 20 is a diagram showing the order of extracting I-Pictures. By the operation input of the user, the control unit 45 follows each G according to the record of the MAP file 32 shown in FIG.
Extract only I-Picture from OP. This I-Pictur
The image data of e is decoded by the MPEG2 image decoder 42 and displayed on the display 44. Thereby, a fast-forward image can be created by a simple procedure. For example, the user can refer to the fast-forward image and efficiently perform the editing work.

That is, the I-Picture is the basis for obtaining the difference from other frames in the MPEG2 compression encoding, and since the I-Picture itself is not compressed as one frame image, only the I-Picture is consecutive. If extracted and reproduced, a fast-forward image can be reproduced that does not cause a viewer to lose an image.

[0114]

As described above, according to the present invention,
A fast-forward image can be easily played back to assist editing work or search for desired content.

[Brief description of drawings]

FIG. 1 is a diagram showing a relationship between a management file and data files of the present invention.

FIG. 2 is a diagram showing a configuration of a root directory.

FIG. 3 is a diagram showing a configuration of a management file directory.

FIG. 4 is a diagram showing the structure of a video file.

FIG. 5 is a diagram showing a relationship of files when a plurality of contents are continuously recorded on a plurality of disc storage media.

FIG. 6 is a diagram showing an example of the structure of a disc recording / reproducing apparatus.

FIG. 7 is a flowchart showing the overall operation of the recording / reproducing apparatus of the present invention.

FIG. 8 is a flowchart showing a recording operation.

FIG. 9 is a flowchart showing a reproducing operation.

FIG. 10 is a flowchart showing an editing operation.

FIG. 11 is a diagram showing an example of an editing operation without changing the MVF file.

FIG. 12 is a diagram showing an example of GOP information of a PPC file before an editing operation.

FIG. 13 is a diagram showing an example of GOP information of a PPC file after an editing operation.

FIG. 14 is a diagram showing an example of an editing operation for making changes to an MVF file.

FIG. 15 is a diagram showing an example of deleting a frame in a GOP.

FIG. 16 is a diagram showing an example of data arrangement of compressed data.

FIG. 17 is a diagram showing an example of data arrangement of compressed data of the present invention.

FIG. 18 is a diagram showing the structure of a GOP of the present invention.

FIG. 19 is a diagram showing a format of a MAP file.

FIG. 20 is a diagram showing an I-Picture extraction order.

[Explanation of symbols]

1 root directory 2 management file directory 3 Video file directory 11 Title management file 12, 22 thumbnail files 13 MVF correlation management file 14 Last Play File 21 Program management file 31 MVF file 32 MAP files 40 Optical disk device 41 MPEG2 Image Encoder 42 MPEG2 Image Decoder 43 Audio output device 44 indicator 45 control unit 46 memory 47 Operation part 48 multiplexer 49 separator 50 optical disks 51 Disk drive I / F 52 Analog input I / F 53 MPEG Audio Encoder 54 MPEG Audio Decoder 55 Analog output I / F

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI H04N 5/92 H04N 7/13 Z 7/24 (56) References Japanese Patent Laid-Open No. 10-66087 (JP, A) Japanese Patent Laid-Open No. 10 -126743 (JP, A) JP 10-336586 (JP, A) JP 10-327417 (JP, A) JP 10-290430 (JP, A) (58) Fields investigated (Int.Cl) . ⁷ , DB name) H04N 5/76-5/937

Claims (4)

(57) [Claims] 1. A code including image data and / or audio data.
Content is compressed and encoded and recorded, and
The file management information that manages the contents must be confirmed in advance.
It is recorded on a disc recording medium that is recorded in a fixed area.
In the method of editing the recorded content, a block of a certain specific size is used, and an image is created for each GOP.
The position of the GOP from the beginning of the image and sound data file
Indicated by the number of blocks and included in the GOP
The number of blocks of the intra-frame coded image
A program showing the start frame and end frame of a GOP.
The file management file as part of the file management information
The start frame included in the program management file is recorded in a certain area.
After editing if the end frame or the end frame is edited
Program tube containing the start or end frame of the
Of the generated edit file and the generated start frame or end frame
The program management file including the file management information
Is recorded in the fixed area as a part of the
Follows the program management file including the end frame
And playing the edited content.
How to edit the content. Wherein said compression coding is not only a MPEG2, editing how the content of claim 1, prior Symbol intraframe encoded image is characterized in that it is a I-Picture
Law. 3. A code including image data and / or audio data
Content is compressed and encoded and recorded, and
The file management information that manages the contents must be confirmed in advance.
It is recorded on a disc recording medium that is recorded in a fixed area.
In the editing device that edits the recorded contents
Then, using a block of a certain size, an image is displayed for each GOP.
The position of the GOP from the beginning of the image and sound data file
Indicated by the number of blocks and included in the GOP
The number of blocks of the intra-frame coded image
A program showing the start frame and end frame of a GOP.
The file management file as part of the file management information
The start frame included in the program management file is recorded in a certain area.
After editing if the end frame or the end frame is edited
Program tube containing the start or end frame of the
Of the generated edit file and the generated start frame or end frame
The program management file including the file management information
Is recorded in the fixed area as a part of the
Follows the program management file including the end frame
And playing the edited content.
Editing device. Wherein said compression encoding, together with a MPEG2, editing apparatus according to claim 3 before Symbol intraframe encoded image is characterized in that it is a I-Picture.