JP3383601B2 - Information recording medium, information recording / reproducing apparatus and method - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to data at the time of editing.
Information recording medium, information recording / playback that facilitates unit management
An apparatus and a method.

[0002]

2. Description of the Related Art As is well known, in recent years, not only audio data but also video data can be compressed and recorded on an optical disk having a diameter of 12 cm which is the same as an audio CD (Compact Disk). There is. An example of this type of optical disc is a CD-ROM (Read Only Memory)
Etc. are widespread in a wide range of fields from education to information.

Recently, on an optical disk having the same shape as a CD, an amount of main video data corresponding to a movie for about 2 hours,
DVD-ROM and the like have been developed in which 8 types of audio data and 32 types of sub-picture data representing subtitles and the like are recorded. At present, for video data, an international standardized MPEG (Moving Picture Image Coding Expe
The DVD standard has also been proposed, which uses the rts Group) 2 compression method and adopts the AC-3 compression method for audio data.

According to the MPEG2 system layer, this DVD standard uses MPEG2 as a video compression method, and AC-3 method and MPE as audio compression methods.
In addition to G format support, sub-picture data obtained by run-length compressing bitmap data for subtitles and control data (navigation pack) for special playback such as fast-forward and fast-reverse are added. ing.

Further, in the DVD standard, ISO (International Organization for Standar) is adopted so that data can be read by a personal computer or the like.
dization) 9660 and Micro UDF (Universal Di
sk Format) and.

On the other hand, at present, the above-mentioned DVD-ROM
As well as playback-only optical discs such as
Development of an optical disk such as a D-RAM (Random Access Memory) capable of writing and rewriting data, and development of a device for recording and reproducing data on this optical disk are active. Has been done to.

[0007]

By the way, this DVD
Even when the video data recorded / reproduced in the RAM is edited based on the DVD standard, it is necessary to perform the editing work using the authoring system like the conventional DVD-ROM. For this reason, there arises a problem that it takes a lot of time and labor for the user, and an economical burden is imposed to prepare the equipment of the authoring system.

Therefore, the present invention provides an information recording medium, an information recording / reproducing apparatus, and a method capable of easily performing a simple editing operation on recorded and reproduced video data.
The purpose is to serve.

[0009]

The present invention provides video data
And control information for controlling reproduction of the video data can be recorded
A method for recording information on a compatible optical disc,
The video data recorded on the disc consists of multiple groups.
Of the video data, including a picture of picture (GOP).
A cell that manages the live section is defined, and the control information is
In that case, the playback order of the video data in units of the cells
It includes multiple program chains that manage
The cell of the program chain is the same part of the video data
Of the video data specified by the cell.
The start and end of the reproduction prohibited section of the data
It is on the way, and the video data
The first step of designating the playback prohibited section and the first step
For the video data in the playback prohibited section specified in step
The second to set the attribute data of reproduction prohibition for the control information
Step and the image corresponding to the above-mentioned reproduction prohibited attribute data.
Third step of deleting image data from the optical disc
And, after the deletion, the end of the reproduction prohibited section.
A GOP with an end in the middle can be played from the beginning
It was designed to be left behind.

[0010]

[0011]

[0012]

[0013]

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 shows a recording / reproducing apparatus for recording / reproducing data on / from an optical disc 11 such as a DVD-RAM.

This recording / reproducing apparatus has a main MPU (Micr
Processing Unit) 12 controls the overall control. In this case, the main MPU 12 has the operation unit 13
The recording / reproducing apparatus is controlled by receiving a request from the user by the user and the control state is displayed on the display unit 14.

The optical disc 11 is a main MP.
It is controlled by the disk driver 15 which is driven based on the command from U12. The disk driver 15 has a function of rotating the optical disk 11 at a predetermined rotation speed by a disk motor and a rotation servo circuit thereof (not shown), and writing data to the optical disk 11 by an optical head and a servo circuit thereof (not shown). , And a function of reading data from the optical disk 11.

Here, the recording operation on the optical disk 11 will be described. First, when the main MPU 12 receives a recording command from the operation unit 13, the main MPU 12 drives the disk driver 1
Read the management data from the optical disk 11 via 5,
Determine the area to write the data.

After that, the main MPU 12 sets the write start address of the determined area to the disk driver 15
Set to and complete the preparation for recording data. Further, the main MPU 12 resets an STC (System Time Counter) 16 which is a timer for measuring a time serving as a reference when the recording / reproducing apparatus performs a recording operation or a reproducing operation.

The video signal and audio signal supplied from the external A / V (Audio / Video) input section 17 or the video signal and audio signal supplied from the TV (Television) tuner 18 are respectively encoded. It is supplied to an A / D (Analogue / Digital) conversion unit 20 which constitutes 19 and digitized, and then supplied to a video encoder 21 and an audio encoder 22. Also, TV tuner 1
A text signal such as a teletext and a closed caption signal obtained from 8 are supplied to the sub-picture encoder 23.

These encoders 21, 22, 23 are
Each input signal is compressed and packetized and output to the formatter unit 24. in this case,
Each packet is divided into packets so that each packet has 2048 bytes when packed. In addition, each encoder 21, 22, 23, STC1
Based on the measurement value of 6, PTS (Presenta of each packet)
tion Time Stamp) and DTS (Decoding Time Stamp)
Has been decided.

Then, the formatter section 24 packs each input packet data, and GOP (Group
After performing pack alignment processing for each picture, add a navigation pack at the beginning of the GOP,
It is output to the data processing unit 25. The buffer memory 26 is used for temporarily storing the packet data when the processing of the formatter unit 24 is performed.

Further, the data processing unit 25 collects the data output from the encoder 19 as described above into 16 ECC packs to form an ECC (Error Correcting Code) group, adds an ECC to each group, and adds the ECC. It is output to the disk driver 15.

However, when the disk driver 15 is not ready to record data, the data processing unit 25 saves the data in the temporary storage unit 27, and the disk driver 15 prepares to record the data. Wait until completion, and when preparation is complete, transfer to the disk driver 15 and record on the optical disk 11.

The temporary storage unit 27 is assumed to have a large storage capacity because it stores recorded data for several minutes or more by high speed access. Then, the data processing unit 25
Is an optical disk 11 on which data for fast forward and fast reverse in the navigation pack is recorded at the end of data recording.
In this area, the address data of each navigation pack is recorded, and necessary information is recorded in the management area of the optical disc 11, and the recording operation is completed.

Next, the reproducing operation for the optical disk 11 will be described. First, when the main MPU 12 receives a reproduction command from the operation unit 13, the main MPU 12 reads the data in the management area of the optical disk 11 via the disk driver 15 and the data processing unit 25, and determines the address for data reproduction.

After that, the main MPU 12 outputs the determined address and the read command to the disk driver 15. Then, the disk driver 15 reads the sector data from the optical disk 11 based on the input read command and outputs it to the data processing unit 25.

In this case, the data processing unit 25 performs error correction processing on the input sector data and outputs it in the form of pack data to the separation unit 29 which constitutes the decoder 28. The separating unit 29 separates the input pack data into video packet data, audio packet data, and sub-video packet data.

The video packet data, audio packet data and sub-video packet data are respectively
It is supplied to the video decoder 30, the audio decoder 31, and the sub-video decoder 32. In this case, since the navigation pack is processed by the main MPU 12, it is stored in the built-in memory 29a of the separation unit 29 so that the main MPU 12 can access it at any time.

Then, the respective packet data separated by the separating unit 29 correspond to the corresponding decoders 30, 3 respectively.
The PTS is loaded into the STC 16 when transferred to 1, 32. This loading process is performed by, for example, the main MPU1.
2 is realized by loading the PTS in the navigation pack into the STC 16, or the video decoder 30 automatically loads the PTS of the video data into the STC 16.

Therefore, each decoder 30, 31, 32
Are the PTS value and STC in the packet data, respectively.
It is possible to execute the packet data reproducing process while comparing with the 16 measured values, that is, in synchronization with the PTS value.

In this way, the video data and the sub-video data reproduced by the video decoder 30 and the sub-video decoder 32 are supplied to the video processing unit 33 and synthesized, and then D / A (Digital / Analogue) The conversion unit 34 converts the data into analog data. The audio data reproduced by the audio decoder 31 is converted into analog data by the D / A converter 35. The outputs of the D / A converters 34 and 35 are
It is taken out through the A / V output unit 36.

FIG. 2 shows the structure of data recorded on the optical disk 11. That is, the optical disc 11 shown in FIG. 2A has an inner peripheral side 11a to an outer peripheral side 1a.
As shown in FIG. 2B, the area 1b is divided into a lead-in area 101, a data area 102, and a lead-out area 103.

Of these, the lead-in area 101 is an embossed data zone (embo) in which the light-reflecting surface has an uneven shape.
ssed data zone), a mirror zone with a flat surface, and a rewritable data zone where data can be rewritten.
It is divided into

The data area 102 is composed of a rewritable data zone in which data can be recorded and rewritten by the user. Further, the lead-out area 103 is composed of a rewritable data zone in which data can be rewritten.

Then, in the embossed data zone of the lead-in area 101, the type, size, and
Information about the entire optical disc such as the recording density and the physical sector number indicating the recording start / recording end position, etc. Information about the reproduction / erasure characteristics and information about the manufacture of each optical disc such as the manufacturing number are recorded.

In the rewritable data zone of the lead-in area 101 and the lead-out area 103,
An area where a unique disk name can be recorded for each optical disk, a test recording area for confirming the data recording / erasing condition, and an area for recording management information regarding the defective area in the data area 102 are set. ing. Data can be recorded or erased by the recording / reproducing apparatus in each of these areas.

Further, in the data area 102, as shown in FIG. 2C, two computer data areas (computer data area) in which computer data are recorded.
ea) 104, 105 and an audio & video data area (audio & video da) where audio and video data are recorded.
ta area) 106 is set, and mixed recording of computer data and audio / video data is possible.
However, the recording order of the computer data and the audio and video data, the recording information size, and the like can be set arbitrarily.

As shown in FIG. 2D, the audio & video data area 106 has a volume & volume
File manager information (volume & fil
e manager information) 107 and control manager information (control manager informat
ion) 108 and a video object
109 and a picture object 1
10 and audio object 11
1 and the text & information object (te
xt & information object) 112.

Of these, the volume & file manager information 107 is information regarding files of audio and video data or the entire volume. The video object 109 is the content of video data (conten
ts) information. The picture object 110 is a thumbnail picture (thumbnail) for searching or editing a still image such as a still image or a slide, or a scene desired to be viewed in video data.
information such as ail picture). The audio object 111 is information on the contents of audio data. Text & Information Object 112
Is a text signal such as teletext and other information.

The control manager information 108 is control information necessary for performing various processes such as data recording, reproduction, editing and retrieval. As shown in FIG. (Playback control informatio
n) 113 and recording control information 114
And edit control information (edit
control information) 115 and thumbnail picture manager information (thumbnail picture ma
nager information) 116.

In this case, the playback control information 113 is control information necessary for reproduction. Recording control information 1
Reference numeral 14 is control information necessary for recording. The thumbnail picture manager information 116 is management information about a thumbnail picture for searching or editing a desired scene in the video data.

The edit control information 115 is control information necessary for editing and has a data structure such as a PGC (program chain) information table shown in FIG.
The playback order is determined by C and the cell. That is,
The PGC indicates a unit in which a reproduction order of a plurality of cells is specified and a series of reproductions are executed, and the cell indicates a reproduction section in which reproduction data is specified by a start address and an end address.

This PGC information table is used for the PGC information management information (information management informati
on) 117 and n search pointers of PGC informatio.
n) # 1 1181 to #n 118n and n PGCs
Information for du
st) # 1 1191 to #n 119n.

Of these, the PGC information management information 117 includes information indicating the number of PGCs (number of PGC information). Further, the search pointer of PGC information # 1 1181 to #n 118n are respectively PG
C Information Fordust # 1 1191- #
n 119n points to the start address, and PG
C Information Fordust # 1 1191- #
It facilitates the search for n 119n.

Each PGC information for dust # 1 1191 to #n 119n is shown in FIG.
As shown in (b), PGC general information (general information) 120 and m cell playback information (cell playbac)
k information) # 1 1211 to #m 121m.

In this case, the PGC general information 120 includes information indicating the PGC playback time and the number of cells (number of cell playback information). As shown in FIG. (Identify information) 122
Is included.

Cell playback information # 1 1211 to #m 121m are respectively shown in FIG.
Cell general information (cell
general information) 123, cell start address (cell start address) 124, cell end address (cell end address) 125, and cell type (cellty)
pe) 126 and.

Of these, the cell general information 123 includes general information such as the cell reproduction time. The cell start address 124 and the cell end address 125 indicate the start address and the end address of the section reproduced as a cell, respectively. The cell type 126 describes information (flag) for controlling whether or not reproduction is possible for the cell, which will be described in detail later.

Here, for the data recorded on the optical disk 11, as shown in FIG. 5A, A, B, C,
It is assumed that the playback sections D, E, and F are designated as cells. Then, for example, in the PGC Information Fordust # 1 1191, as shown in FIG. 5B, three cells A, B, which specify continuous reproduction sections,
If C is described, cells A, B and C are continuously reproduced in this order.

Also, as shown in FIG. 5C, PGC Information Fordust # 2 1192 has three cells D, E, and F that specify intermittent playback sections. , E, F are successively reproduced in this order. Further, in PGC Information Fordust # 3 1193, as shown in FIG. 5D, five cells E, A, D, B and E in which a reproduction section is designated irrespective of the reproduction direction and the overlapping reproduction are described. Even if it is present, reproduction is continuously performed in the order of cells E, A, D, B and E.

Here, the cell type 126 will be described. The cell type 126 is composed of 1 byte (8 bits). For example, "00 (h: hexadecimal)" indicates reproducible and deletion prohibited (normal), and "01 (h)" indicates reproduction prohibited and deletion prohibited. (Recycle bin sequence)
“FF (h)” indicates that deletion is possible. Therefore, it becomes possible to control whether or not reproduction is possible in cell units.

Further, the PGC Identify Information 122 in the PGC General Information 120 contained in each of the PGC Information Fordust # 1 1191 to #n 119n includes the PGC Information Fordust # 1.
1191 to #n Information (flag) for controlling whether or not a series of continuous reproduction is possible for the cell designated by 119n
Is described.

That is, the PGC identify information 122 is composed of 1 byte, and is reproducible with "00 (h)" and is prohibited from deletion (normal).
"01 (h)" indicates that deletion is possible, and "11 (h)" indicates
(H) ”prohibits playback and deletion (recycle bin sequence)
Is shown. Therefore, it becomes possible to control the propriety of reproduction for each PGC.

Further, the PGC information management information 117 in the PGC information table shown in FIG.
In the GC information table, PGC identify information 122 and cell type 1
The flag of 26 includes a flag DUST_DAT Flag indicating whether or not unnecessary data, that is, reproduction-prohibited and deletion-prohibited or deletable data exists.
This flag DUST_DAT Flag is composed of 1 byte. For example, "00 (h)" indicates that there is no unnecessary data, and "01"
(H) ”indicates that there is unnecessary data.

The PGC information management information 117 contains PGs in the past.
Whether or not the flags of the C-identify information 122 and the cell type 126 have been changed,
That is, a flag DUST_EDIT Flag indicating the presence or absence of edit history is included.

The flag DUST_EDIT Flag is composed of 1 byte. For example, "00 (h)" indicates that there is no edit history, and "01 (h)" indicates that there is an edit history. Therefore, for example, for each title, which is a set of a plurality of PGCs,
It becomes possible to know the presence or absence of unnecessary data and the presence or absence of edit history.

Therefore, by appropriately setting the flags of the PGC information management information 117, the PGC identify information 122 and the cell type 126, it is possible to skip the unnecessary data portion and reproduce it, or restore the unnecessary data portion. It becomes possible to easily perform a simple editing work without using an authoring system as in the conventional case.

In addition, in order to realize such a simple editing operation and to realize a function capable of seamlessly reproducing the edited data, and to effectively delete unnecessary data. When recording data,
It is necessary to preliminarily divide each cell into GOP units.

Since the minimum editing unit of this simple editing function is a cell, the cell length is set to a short fixed length of, for example, about 0.5 seconds in order to make the editing range precise to some extent. It becomes necessary to record it.

Next, FIG. 6 shows a flowchart summarizing the data recording operation for the optical disk 11.
First, when a recording command is received by the main MPU 12 and started (step S1), the main MPU 12 reads the management data from the optical disk 11 in step S2, and writes it in the management area of the optical disk 11 in step S3. After creating the predetermined data to be recorded, the recording initial setting is executed in step S4.

As the initial setting for recording, the initial setting of each encoder 21, 22, 23, such as setting an average transfer rate in the video encoder 21, and ST
Formatter unit 24 for resetting C16, setting a write start address to the disk driver 15, and setting dummy pack insertion and cell delimiter time, for example.
There is an initial setting of.

After that, the main MPU 12 carries out step S.
At 5, the recording start command is set in each of the encoders 21, 22, 23, and the recording operation on the optical disc 11 is started. During this recording operation, the main MPU 12 determines in step S6 whether or not the recording end key of the operation unit 13 has been operated. If not (NO), in step S7, the remaining recording capacity of the optical disk 11 is reached. To calculate.

Then, the main MPU 12 carries out step S.
At 8, it is determined whether or not the remaining recording capacity has become equal to or less than a certain amount, and when it is determined that the remaining recording capacity has become less than or equal to (YES), at step S9, for example, it is displayed that the remaining recording capacity of the optical disk 11 has become small. Warning processing such as displaying on the unit 14 is executed.

After that, the main MPU 12 carries out step S.
At 10, it is determined whether or not the remaining recording capacity of the optical disk 11 is exhausted, and if not exhausted (NO), the process returns to step S6. Further, if it is determined in step S10 that the remaining recording capacity of the optical disk 11 is exhausted (YES), or if it is determined in step S6 that the recording end key has been operated (YES), the main MPU
A step 12 executes a recording end process in step S11.

As the recording end processing, processing for initializing the encoders 21, 22, 23 and the formatter unit 24, the data created in step S3 and the free space and P
There is a process of writing information about the GC and the like in the management area of the optical disc 11.

Then, the main MPU 12 carries out step S
At 12, the flags of the PGC information management information 117, the PGC identify information 122, and the cell type 126 described above are all set to "00 (h)" as initial values, and the process ends (step S13).

Next, FIG. 7 shows a flowchart summarizing the data reproducing operation for the optical disk 11.
First, when the reproduction command is received by the main MPU 12 and is started (step S14), the main MPU 12 determines in step S15 whether or not the correct optical disk 11 suitable for this recording / reproducing apparatus is loaded, and is correct. When it is determined that the optical disk 11 is not loaded (N
O), after performing error processing in step S16, the process ends (step S17).

When it is determined in step S15 that the correct optical disk 11 is loaded (YES), the main MPU 12 determines in step S18 the optical disk 11.
The management data is read from step S19.
Select and decide the title set to be played. After that, the main MPU 12 reads the video title set information from the optical disc 11 in step S20, and selects / determines the title to be reproduced in step S21.

Then, the main MPU 12 carries out step S
When the program number, cell number, etc. to be reproduced are determined in step 22, each decoder 30, 31, 32 is determined in step S23.
The initial setting is performed, the preprocessing command is executed in step S24, and then the cell reproduction processing described later is executed in step S25. During this cell reproduction process, the main MPU 12 determines in step S26 whether or not it is the last cell, and if it is not the last cell (NO), step S27.
Then, the cell number is incremented and the process returns to step S25.

When it is determined in step S26 that the cell is the last cell (YES), the main MPU 12 executes the PGC still process for displaying the still screen for the set time in step S28, and in step S29, After executing the post-processing command, in step S30, it is determined whether or not the reproduction is ended. When the reproduction is not completed (N
O), the main MPU 12 returns to the process of step S24, and when the reproduction is completed (YES), step S31.
Then, the process at the end of the reproduction is executed to end the process (step S3
2) Is done.

Next, FIG. 8 is a flow chart summarizing the cell reproduction processing operation of step S25.
First, when started (step S33), the main MPU
In step S34, 12 determines whether or not cell reproduction has been started. If not (NO), in step S35, it is determined whether or not the video object unit is continuous.

When it is determined that the video object units are not continuous (NO), or when it is determined that the cell reproduction is started in step S34 (YES), the main MPU 12 has step S36.
Then, the reproduction start address is determined based on the PGC information, and a data read command is set in the disk driver 15 in step S37.

After this step S37, or when it is determined in step S35 that the video object units are continuous (YES), the main MPU 12
In step S38, the navigation pack is loaded, and in step S39, synchronization information is set, and then, in step S40, packet processing of PGC information is executed.

Then, the main MPU 12 carries out step S
In 41, it is determined whether or not the still display of the video object unit is performed, and if it is determined (YES), in step S42, it waits until the reproduction of the target video object unit is completed, and in step S43, for example The still process of the video object unit is executed so that the still operation is continued until a key or the like is operated.

After this step S43, or when it is determined in step S41 that the still display of the video object unit is not performed (NO), the main MPU
12 determines in step S44 whether or not the cell is the last cell, and if not (NO), the process returns to step S38.

If it is the end of the cell (YES), the main MPU 12 waits until the reproduction of the target video object unit is completed in step S45,
In step S46, the cell still process for performing still display for the set time is executed, and the process is terminated (step S4).
7) Is done.

Next, FIG. 9 shows the PGC information management information 117, PGC.
The flowchart for demonstrating the edit mode in which the flag of the identify information 122 and the cell type 126 is set by the user is shown.

In this edit mode, first, normal reproduction is carried out, and the user selects a start image of an unnecessary portion in still reproduction or frame advance reproduction. The minimum editable range is per cell. Therefore, the recording / reproducing apparatus is in a mode in which the first still image of the cell is reproduced in still reproduction, frame advance reproduction, or the like, and after the user selects the image, the number of the selected cell is stored.

Similarly, the end image of the unnecessary portion is selected. However, at this time, the recording / reproducing apparatus is in a mode in which the last still image of the cell is reproduced in still reproduction or frame-advance reproduction, and after the user selects an image, the number of the selected cell should be stored. become.

That is, this edit mode is started in the reproduction state of the optical disk 11 (step S48). Then, first, in step S49, the main MPU 12 is switched to the setting for reproducing the head of the cell at the time of still reproduction, and in step S50, the main MPU 12 enters a state of accepting a key input by the user.

After that, the main MPU 12 carries out step S.
In step 51, it is determined whether or not the still reproduction mode is in effect. If the still reproduction mode is not in effect (NO), step S52.
Then, it is determined whether or not the reproduction mode including other special reproduction is in progress. If it is in the special playback mode (YE
S), the main MPU 12 returns to the process of step S50, and if it is not in the special reproduction mode (NO), step S50.
In 53, the undetermined unnecessary range information (flag) is cleared, and the process ends (step S54).

If it is determined in step S51 that the still reproduction mode is in effect (YES), the main M
In step S55, the PU 12 determines whether or not an operation of setting the flags of the PGC identity information 122 and the cell type 126 to the reproduction prohibited state is performed, and if the operation is not performed (NO), the process of step S50. Return to.

When it is determined in step S55 that the operation has been performed (YES), the main MPU 12
In step S56, it is determined whether or not the same operation has been performed on the previous cell, and if the same operation has not been performed (N
O), in step S57, the flag contents of the PGC identification information 122 and the cell type 126 are fixed for the start cell of the unnecessary range, and in step S57
At 58, the setting is switched to the reproduction of the end of the cell at the time of still reproduction, and the process returns to step S50.

If it is determined in step S56 that the same operation has been performed on the previous cell (YES).
In step S59, the main MPU 12 determines whether the current cell number is equal to the previous cell number or is later in time, and if not (N
O), in step S60, the unnecessary range information (flag) for the previous cell and the current cell is cleared, and step S60
Returning to the processing of 49.

On the other hand, if the result is NO in step S59 (Y
ES), the main MPU 12 finalizes the flag contents of the PGC identification information 122 and the cell type 126 for the end cell of the unnecessary range in step S61, and records it on the optical disc 11 in step S62. Then, the main MPU 12 carries out step S63.
Then, a flag is created for the PGC information management information 117 and recorded on the optical disc 11, and the process returns to step S49.

Next, a description will be given of deleting a portion of the edited image that is determined to be unnecessary or restoring the original title. The user can recognize the list of titles on the screen by opening the title menu as shown in FIG. At this time, the recording / reproducing device
By referring to the flag DUST_DAT Flag of the PGC information management information 117, it is determined whether or not unnecessary data generated after editing remains in the title, and the information indicating whether or not unnecessary data exists for the title is also the title. Display on the menu.

When the user selects a specific title on the title menu and sets "open detailed title information", the recording / reproducing apparatus refers to the flags of the PGC identify information 122 and the cell type 126. As shown in FIG. 10B, detailed information of unnecessary parts regarding the selected title is displayed on the screen.

The user can set deletion or restoration for each unnecessary portion by looking at the screen of the detailed information for each title. When the deletion is selected, the recording / reproducing apparatus rewrites the cell type 126 existing in the target unnecessary range whose content is “01 (h)” into “FF (h)”, and Of the PGC identification information 122 existing in the unnecessary range, the contents of “11 (h)” are rewritten to “01 (h)”, and the deletion of the unnecessary portion is completed.

When the revival is selected, the recording / reproducing apparatus selects the cell type 126 existing in the target unnecessary range.
And the contents of the PGC Identify Information 122 are both rewritten to "00 (h)" to complete the restoration. In addition, when there is no unnecessary portion in the title due to deletion or restoration, the recording / reproducing apparatus sets the flag DUST_DAT Flag of the PGC information management information 117 to “00 (h)” and no unnecessary data exists. It can be processed as a title.

FIG. 11 shows a flowchart summarizing the operations of deleting and restoring such unnecessary parts. First, as described above, the title menu is opened and started (step S64), and the user starts step S65.
Then, when a predetermined title is selected from the title menu, detailed information about the selected title is opened in step S66. In this detailed information, a list of unnecessary parts is displayed as described above.

Then, in step S67, the user selects a predetermined unnecessary part from the displayed list, and in step S68, selects the attribute change of deletion or restoration. Here, when the deletion is selected, the main MPU 12 changes the data attribute of the cell to be deleted to be deletable, as shown in step S69a. That is, the flags of the PGC identify information 122 and the cell type 126 are rewritten as described above. At the same time, the range of the deleted portion is registered for the information that manages the recordable area.

When the revival is selected, the main MPU
12, as shown in step S69b, changes the data attribute of the restored cell to reproducible. Then, in step S70, the main MPU 12 sets the flag DUST_DAT Flag of the PGC information management information 117 to "no unnecessary data".

Next, an example of reusing the deleted portion will be described. That is, the main MPU 12, when creating the title menu and the detailed information for each title, as shown in FIG. 12, the deleted portion reference table in which the title numbers are associated with the start physical addresses and end physical addresses of unnecessary portions thereof. To create.

Then, as shown in FIG. 13, when it is started (step S71) and the user selects a deletion point in step S72, the main MPU 12 executes the step S7.
In step 3, it is determined whether or not the deletion range is continuous with the contents of the deleted portion reference table in terms of physical address (YES), and in step S74, the table data linked by physical address is retrieved. Update, that is, rewrite the new range with respect to the existing data, and end (step S7).
5) is done.

If it is determined in step S73 that they are not continuous (NO), the main MPU 12 adds the range to be selected this time to the table as new data in step S76, and the process is terminated (step S75). It

On the other hand, FIG. 14 shows another example of reusing the deleted portion. That is, start (step S77)
Then, the main MPU 12 reads the deleted portion reference table in step S78, determines whether or not the contents of the deleted portion reference table were used during recording in step S79, and if not (NO), If it is finished (step S80) and is used (YES), step S
At 81, the contents of the deleted portion reference table are updated or deleted, and the process is terminated (step S80).

Here, in the above-described embodiment, the case where each cell is divided into GOP units in advance at the time of recording data on the optical disc 11, that is, the GOP is completed in each cell will be described. ing. However, the cells can be divided in the middle of the GOP.

For example, as shown in FIG.
For OP1 to GOP6, each cell A, B, C, D is
It is also possible to specify that the boundary between cells A and B is in the middle of GOP2, the boundary between cells B and C is in the middle of GOP4, and the boundary between cells C and D is in the middle of GOP5.

By the way, one GOP is usually shown in FIG.
As shown in, 15 screens corresponding to 0.5 seconds (pict
ure). Specifically, one intra-frame coded image [I (Intra) picture] obtained by intra-frame coding the entire one screen is placed at the beginning, and after that, the already coded temporally previous Four inter-frame coded images predicted from frames [P (Predictive) picture]
And 10 inter-frame coded images [B (Bidirectionally) predictiv] that are predicted from two frames that are temporally preceding and following.
e picture] are arranged in a predetermined order. Therefore, unless the I picture located at the beginning of the GOP is read, one screen of the GOP cannot be reproduced.

Here, in FIG. 15, consider a case where the cell type 126 of cell B has a reproduction inhibition flag set, and continuous reproduction is performed from cell A to cell C. In this case, the recording / reproducing apparatus, when the reproduction of the cell A is completed,
It operates to read the data at the beginning of cell C. However, since the head position of the cell C is in the middle of GOP4, only P picture or B picture can be read, and one screen of GOP4 cannot be reproduced.

Therefore, this recording / reproducing apparatus is controlled to automatically retrieve and reproduce the I picture at the head of the GOP when the head position of the cell to be reproduced is in the middle of the GOP.

FIG. 17 shows a flowchart summarizing this control operation. First, start (step S82)
Then, in step S83, the main MPU 12 searches the reproduction start position on the optical disk 11, that is, the head position of the cell C in the above example.

After that, the main MPU 12 carries out step S.
At 84, it is determined which position on the GOP the searched reproduction start position is. This search and discrimination processing is performed by the main M
The PU 12 is realized by referring to the information of the control manager information 108 described above, for example.

Next, the main MPU 12 carries out step S8.
In step 5, it is determined whether or not the reproduction start position coincides with the head position of the GOP. If they coincide (YES), in step S86, the reproduction operation of the optical disk 11 is started from the searched reproduction start position. Then, the process ends (step S87).

When it is determined in step S85 that the reproduction start position does not match the head position of the GOP (NO), the main MPU 12 determines in step S88 that the GOP including the searched reproduction start position is not included. The start position is searched, and in step S89, data is sequentially read from the searched start position of the GOP.

After that, the main MPU 12 carries out step S.
At 90, the video processing unit 33 creates frame information of the head position of the GOP, and at step S91, the frame information is displayed, and the process ends (step S87). As a result, the start position of the cell requested for reproduction is GO.
Even in the middle of P, the cell can be reproduced.

The present invention is not limited to the above-described embodiments, but can be variously modified and implemented without departing from the scope of the invention.

[0108]

As described above in detail, according to the present invention,
It is possible to provide a very good video data recording medium, a video data recording device, and a video data reproducing device in which a simple editing operation can be easily performed on video data to be recorded and reproduced.

[Brief description of drawings]

FIG. 1 is a block diagram illustrating a recording / reproducing apparatus that uses an optical disc as a recording medium, according to an embodiment of the present invention.

FIG. 2 is a diagram shown for explaining a hierarchical structure of data recorded on an optical disc.

FIG. 3 is a diagram shown for explaining a detailed structure of edit control information.

FIG. 4 is a diagram shown for explaining details of cell playback information.

FIG. 5 is a diagram for explaining a cell designation and a cell reproduction operation based on PGC information.

FIG. 6 is a flowchart shown to explain a data recording operation on an optical disc.

FIG. 7 is a flowchart shown to explain a data reproducing operation for an optical disc.

FIG. 8 is a flowchart shown for explaining a detailed operation of cell reproduction processing in the data reproduction operation.

FIG. 9 is a flowchart shown to explain the operation of an edit mode for setting a flag for simple editing.

FIG. 10 is a diagram shown for explaining a title menu screen and a title detailed information screen.

FIG. 11 is a flowchart shown to explain an operation of deleting and restoring unnecessary portions.

FIG. 12 is a diagram shown for explaining a deleted portion reference table used when reusing a deleted portion.

FIG. 13 is a flowchart shown to explain the operation when reusing a deleted portion.

FIG. 14 is a flowchart shown to explain another example of the operation when reusing a deleted portion.

FIG. 15 is a diagram shown for explaining an example in which the boundary of consecutive cells is designated to be in the middle of a GOP.

FIG. 16 is a diagram shown for explaining an example of a frame structure of one GOP in the MPEG standard.

FIG. 17 is a flowchart shown to explain a reproducing operation when the beginning of a cell to be reproduced is in the middle of a GOP.

[Explanation of symbols]

11 ... Optical disc, 12 ... Main MPU, 13 ... operation part, 14 ... Display, 15 ... Disk driver, 16 ... STC, 17 ... A / V input section, 18 ... TV tuner, 19 ... Encoder, 20 ... A / D converter, 21 ... video encoder, 22 ... voice encoder, 23 ... Sub-picture encoder, 24 ... Formatter part, 25 ... Data processing unit, 26 ... buffer memory, 27 ... Temporary storage unit, 28 ... Decoder, 29 ... Separation part, 30 ... video decoder, 31 ... audio decoder, 32 ... Sub-picture decoder, 33 ... video processing unit, 34, 35 ... D / A converter, 36 ... A / V output section.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI H04N 5/91 H04N 5/91 N (56) Reference JP-A-6-139704 (JP, A) JP-A-4-125882 ( JP, A) JP 10-3778 (JP, A) JP 11-187354 (JP, A) JP 7-85605 (JP, A) JP 11-341438 (JP, A) (58 ) Fields surveyed (Int.Cl. ⁷ , DB name) G11B 27/00 G11B 20/12 G11B 27/10 H04N 5/85 H04N 5/91

Claims (4)

(57) [Claims] 1. Video data and reproduction control of the video data
Control information to be recorded on the optical disc
The video data recorded on the optical disc is
A cell including a group of pictures (GOP) and managing a reproduction section of the video data is defined.
In the control information, the reproduction order of the video data is managed in units of the cells.
Multiple program chains are included, and cells of different program chains are
The same part can be duplicated and can be played in the cell that can play the previous term video data.
Playback of the video data is prohibited by defining the cell
The start and end of the section are in the middle of the GOP unit, and the reproduction prohibition section of the video data with respect to the video data
And the video data of the playback prohibited section specified in the first step.
Attribute data that prohibits playback for control information for data
The second step of setting and the video data corresponding to the play-restricted attribute data
A third step of deleting from the optical disc , and after the deletion, the end of the reproduction prohibited section is located at an intermediate position.
The GOP held in is left so that it can be played from the beginning.
A method for recording video data, characterized in that 2. The video data recording method according to claim 1.
Control for controlling video data and reproduction of the video data
An optical disc on which information and information is recorded. 3. The image data of the optical disk according to claim 2.
And a reproducing method for reproducing the video data . 4. The image data of the optical disc according to claim 2.
Data and control information for controlling the reproduction of the video data.
Playback device that grows.