JP3386763B2 - Information recording method, information reproducing method and apparatus, and information recording medium - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to, for example, an RTR.
(Real Time Recorder) -DVD (Digital Versatile)
And an information recording / reproducing apparatus such as an optical disk such as an optical disk.

[0002]

2. Description of the Related Art As is well known, in recent years, a moving picture compatible optical disk reproducing apparatus for reproducing an optical disk on which data such as video and audio is recorded has been developed.
k) and video CDs (Compact Disks), etc., are widely used for the purpose of movie software, karaoke, etc.

Among these, the MP which has been internationally standardized at present.
EG (Moving Picture Image Coding Experts Group)
A DVD standard has been proposed in which two systems are adopted and an AC (Audio Compression) -3 audio compression system is adopted.

According to the MPEG2 system layer, the DVD standard supports MPEG2 as a moving image compression method, AC-3 audio and MPEG audio as audio, and sub-picture data obtained by run-length compressing bitmap data for subtitles. It is configured by adding control data (navigation pack) for special playback such as fast forward playback and fast reverse playback.

Further, according to the DVD standard, ISO (Intern) is used so that a computer can read data.
ational Organization for Standardization) 9660
And micro UDF (Universal Disk Format) are supported.

As the standard of the medium itself, DV is
DVD-RO which is the medium used for D-video
Following M (Read Only Memory), DVD-RAM (Rand
om Access Memory) standard [2.6 GB (Giga Byte
s)] has also been completed, and DVD-RAM drives are beginning to spread as computer peripherals.

At present, by utilizing this DVD-RAM, a DVD capable of recording and reproducing in real time is realized.
The RTR-DVD standard, which is a video standard, has been completed and announced.

The RTR-DVD standard is considered based on the DVD-video standard that is currently on the market. Further, a file system compatible with this RTR-DVD is currently under standardization.

Here, a minimum data length unit of AV (Audio Video) data is defined so that continuous reproduction can be performed even when a defect or a jump occurs during real-time recording. The CDA
(Contiguous Data Area).

Regarding the temporary erasing process, Japanese Patent Application No. 10-
No. 9904 and Japanese Patent Application No. 10-192064 are proposed.

[0011]

However, in Japanese Patent Application No. 10-192064, for example, since the temporary erasing process is performed in cell units, the PGC for instructing the cell reproducing order is used.
There are multiple I (Program Chain Information), VO
When B (Video Object) is registered in a plurality of cells in an overlapping manner and erase prohibition is specified in the cell, the portion in which temporary erase is registered can be reproduced in another PGC during reproduction, and processing is performed. There is a contradiction.

Therefore, the present invention has been made in consideration of the above circumstances, and is an extremely good information recording medium which enables fine setting of a unit for performing temporary erasing processing, which in turn enables fine data management. Another object of the present invention is to provide an information recording / reproducing device.

[0013]

According to the present invention, in an information recording method for an information recording medium, regarding a data in a data area of the information recording medium, a set of a plurality of video packs and audio packs is a video object unit.
(VOBU) , a plurality of the video object units (VOBU) are aggregated to define a video object (VOB), and the management information of the management information area of the information recording medium is at least the video object. Program chain information (PGCI) for reproducing a part is defined. This program chain information includes a plurality of cell reproduction information (CI) , and each cell reproduction information specifies video object information. Search pointer number (M_VOBI_SRP
N) is included and the video object information (VOBI) designated by the search pointer number includes a video
Object information general information (M_VOBI_GI),
The time including the time map information (TMAPI)
Map information (TMAPI) includes time map entry
-Information (TM_ENT) in the video object
Video unit entry information (VOBU_ENT)
Is included, the entry information is
Playback time information of the relevant video object unit
(VOBU_PBTM), and the video object
General information (M_VOBI_GI) includes the video
Temporary erase flag indicating whether the object is temporary erase or normal
Type information (VOB_TY) including (TE), video
Includes information about the start time and end time of the object
It is, when adding the temporary erase flag for the video object, when the end of the addition range of the temporary erase flag is not the boundary of the video object is to divide the current video object and the divided intended to create a video object information for those leaves of a video object, a video object information for video objects temporary erase flag of the divided video object is added, the temporary erase flag
For the video object to which the
The time information (TM_EM
T), the video object Uni Tsu door number of the (VOBU)
It records information .

[0014]

[0015]

[0016]

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will now be described in detail with reference to the drawings. In DVD-Video, data is stored in a normal file format. In the RTR-DVD, one moving image VOBS (Video Object Set) file exists on one disc, and the playback order used when playing back in the recording order is recorded.
The original PGC.

In addition, a directory exists for each standard in the DVD, and VIDEO_T in the DVD-video.
In S and DVD-audio, it is AUDIO_TS, and in the recording / reproducing DVD, it is DVD_RTR as shown in FIG. Each record data exists in this directory.

Further, in the RTR-DVD standard, the management information of video data is VMG (Video Manager).

Video files are managed in a hierarchical structure as shown in FIG. 2, and one VOBS is a plurality of VOs.
B, one VOB is multiple VOBUs
(Video Object Unit). Also, VO
BU is composed of a pack made up of a plurality of various types of data. One pack is composed of one or more packets and a pack header, and each video data,
Audio data is recorded in this packet.

Here, a pack is a minimum unit for performing data transfer processing.

The order of reproducing the data is PGC.
, A plurality of PGs (Programs) are registered in this PGC, a cell is registered in this PG, and a VOB number is registered in the cell. Among them, the reproduction start time in the VOB, the reproduction The end time is shown.

The PGC information PGCI actually records the structure of this PGC. This PGC is used for playback processing.
PGC when recording or editing
Will create I.

Here, PGCI is as shown in FIG.
Included in VMG. PGCI is PGC_G
I (number of PGs included in PGC, number of cells included), PGIT [PG type: protection / non-protection, number of cells in PG, primary text information, SRP (Search Pointe) to item text
r) number, thumbnail pointer], CI_SRPT (cell search pointer table), and CIT (cell information table).

Further, the CIT is composed of CI # 1 to #j, and CI is C_GI (cell type, VOB information VO
Search pointer to BI: VOB number of cell to be reproduced, cell reproduction start time, cell end time) and C_EPI #
1 to #k [EP (Entry Point) type (presence / absence of text information), EP reproduction time, text information).

In the RTR-DVD, a special PGC for reproducing in the order of recording is called an original PGC, and the information of this original PGC is recorded in ORG_PGCI.

Further, the minimum unit for logical processing is a cell, and logical processing is performed in this unit.

FIG. 4 shows a recording / reproducing apparatus for recording / reproducing data on / from the optical disk 11. This recording / reproducing apparatus mainly includes an A / V (Audio / Video) input unit 12, an MPU (Microprocessing Unit) unit 13, a display unit 14, a decoder unit 15, an encoder unit 16, a TV tuner unit 17, and an STC (System Time Clock). ) Part 18, D
(Data) -PRO (Processer) unit 19, temporary storage unit 2
0, disk drive unit 21, key input unit 22, V (Vi
deo) mixing unit 23, frame memory unit 24, TV
D / A (Digital / Analogue) converter 2 for receiver 25
6 and I / F (Inter / Face) section 2 for digital output
It has 7, 28.

The encoder section 16 has an A / D (Analogue /
Digital) converter 16a, video encoder 16b,
Audio encoding unit 16c, SP (Sub Picture)
The encoder 16d, the formatter 16e, and the buffer memory 16f are included.

The decoder unit 15 includes a separation unit 15b having a built-in memory 15a, a video decoding unit 15c, an SP decoding unit 15d, an audio decoding unit 15e, and V-PRO.
It is composed of a section 15f and a D / A conversion section 15g for the speaker 29.

Furthermore, there are two types of data processing: recording processing and reproduction processing.

Data processing during recording is as follows. First, when the MPU unit 13 receives a recording command from the key input unit 22, it reads the management data from the disk drive unit 21 and determines a write area. Next, the management area is set to write the determined area, and the write start address of the video data is set to the disk drive unit 2.
Set to 1 and prepare to record data.

Next, the MPU section 13 resets the time in the STC section 18. Here, the STC unit 18 is a system timer and performs recording and reproduction based on this value. Further, the MPU unit 13 makes other settings.

The actual video signal flow is as follows. First, the input A / V signal is input to the A / D converter 1
6a converts into digital data. This digital data is supplied to each encoding unit 16b, 16c, 16d.

That is, the video data is input to the video encoding section 16b and MPEG-compressed. The audio data is input to the audio encoding unit 16c and is AC-3 compressed or MPEG audio compressed.
Character data such as character broadcasting is input to the SP encoding unit 16d and is run-length compressed.

Further, each encoding unit 16b, 16c,
In 16d, when the compressed data is packed, it is packetized so that one pack is 2048 bytes and is output to the formatter unit 16e. Formatter section 16
In e, each packet is packed, further multiplexed, and D is added every time one CDA (Contiguous Data Area) is accumulated.
-It is output to the PRO unit 19.

The CDA is defined by the RTR-DVD standard, and is data that requires at least continuous A / V data so that continuous reproduction is possible even when a defect or jump occurs during real-time recording. It is a long unit.

At this time, for example, 1 GOP (Grou
VOBU for each p of pictures), the division information at that time is stored in the buffer memory unit 16f, and when the division information is accumulated to some extent, it is transferred to the MPU unit 13, and M
The PU unit 13 creates time map information based on the information (sent at the time of GOP head interrupt or the like).

Here, as the division information (VOBU information), the size of the VOBU, the reproduction time from the beginning of the VOBU to the end, the LBN from the beginning of the VOBU to the end of the I-picture, which is an intra-frame encoded image, and the like can be considered. .
In addition, the formatter unit 16e directly creates time map information based on the above-mentioned segmentation information, and M format in the form of TMAP.
It is also possible to pass it to the PU unit 13.

In the D-PRO unit 19, E every 16 packs
A CC block is formed, error correction data is added, and the disk drive unit 21 records the data on the optical disk 11. Here, when the disk drive unit 21 is in a busy state due to seek or track jump, etc., it is put into the temporary storage unit 20 and waits until the disk drive unit 21 is ready. Also, record / playback DVD
Then, there is one video file per disc.

However, in the MPU unit 13, in order to read and write the management area of the file, etc., the D-PRO unit 1
9 can be read and written via the microcomputer bus.

At the end of recording, the temporary erasure flag (erasure level Flag) is cleared to permit reproduction.

Further, in order to manage the video data, V
M_AVFITI (MovieAV File Informati
on Table Information) and PGCI for controlling the reproduction order, and a CDA table is recorded as an AV-dedicated file extent for managing data in CDA units in the file system.

Of these, M_A depends on the division information.
TMAPI (TimeMap Information) in VFITI
Creating PGCI and setting PGCI in the order recorded
In _PGCI, the contents recorded in CDA units are reflected in the CDA table.

Here, the recording processing operation will be described with reference to the flow charts shown in FIGS.

1. Read file system data,
It is checked whether or not there is a free space. If there is no free space, a message to that effect is displayed and the process ends.

2. If there is free space, pre-recording processing is performed to determine the write address.

3. Each encoding unit 16b, 16c, 16
Initialize recording for d. At this time, the PG, cell, and VOBU delimitation conditions are set in the formatter unit 16e so that the formatter unit 16e automatically delimits them. Also, when performing the aligning process, the setting is made in the formatter unit 16e.

4. A recording start command is set in the encoder unit 16.

5. When the first 1 CDA is stored in the buffer memory unit 16f, the write address, the write length, and the write command are issued to the disk drive unit 21.

6. It is checked whether or not the division information is accumulated, and if it is accumulated, the formatter unit 16
The division information is read from e.

It is checked whether or not 7.1 CDA worth of data has been stored in the buffer memory section 16f. If not, the process proceeds to the processing of 9.

8. When accumulated, the CDA process during recording is performed, and the recording address, the recording length, and the recording command are issued to the disc drive unit 21.

9. It is checked whether or not the recording end key has been pressed, and if there is no stop key input, the process moves to 6.

10. The VMG of the work RAM in the MPU unit 13 is updated based on the division information received from the formatter unit 16e. At this time, the VO in M_AVFIT
Clear the temporary erase flag of BI.

11. Perform other recording processing.

As the interrupt processing, there are an interrupt notifying that the formatter section 16e has accumulated the cut-off information, an interrupt notifying that the D-PRO section 19 has transferred one pack of data, and the like. To do.

Further, the data processing during reproduction is as follows. First, when the MPU unit 13 receives a playback command, the MPU unit 13 reads the management area from the disk drive unit 21 through the D-PRO unit 19, and reads the management area from the file system.
The MG file is read, the PG and cell to be reproduced are determined from the VMG data, the VOB to be reproduced is determined from the cell information, and the reproduction start address is determined from the VOBI data and the file system. Next, the MPU unit 13 sends to the disc drive unit 21 the address of the data to be reproduced, which has been determined previously, and the read command.

The disk drive section 21 reads the sector data from the optical disk 11 according to the sent command, corrects the error in the D-PRO section 19, and outputs it to the decoder section 15 in the form of pack data.

In the decoder unit 15, the read pack data is received by the separating unit 15b and packetized, and the video packet data (MPEG video data) is transferred to the video decoding unit 15c according to the purpose of the data, and the audio packet data is transferred. Is transferred to the audio decoding unit 15e, and the sub-picture packet is transferred to the SP decoding unit 15d.

Each packet data sent has a PTS (Presentation Time Stamp) at the start of transfer, and is transferred to the STC unit 1.
8 and then the decoding units 15c and 15
d and 15e can perform a reproduction process in synchronization with the value of PTS in the packet data (while comparing the values of PTS and STC) to reproduce a moving image with audio subtitles on the TV 25.

At this time, as shown in FIGS. 7A and 7B, the VOB registered in the cell before the cell reproduction processing is performed.
Check the temporary erase flag of, and if it is temporary erase,
Playback of the cell is skipped and the process moves to the next cell.

A specific data processing operation during reproduction will be described with reference to the flowchart shown in FIG.

1. Disc check, rewritable disc (DVD-R, DVD-RW, DVD + RW, D
VD-RAM) is checked, and if it is not a rewritable disc, that fact is returned and the process ends.

2. The file system of the optical disk 11 is read out, and it is checked whether or not there is a volume structure. If there is no volume structure, "no recording" is displayed and the process ends.

3. It is checked whether or not there is a DVD_RTR directory. If there is no DVD_RTR directory, “Not recorded” is displayed and the process ends.

4. It is checked whether or not there is a CDA table. If there is no CDA table, “Not recorded” is displayed and the process ends.

5. It is checked whether or not there is a VRO file. If there is no VRO file, “Not recorded” is displayed and the process ends.

6. A VMG file is read, a program to be reproduced and a cell are determined (selected by the user), and a file pointer (logical address) to start reproduction is determined.

7. CDA processing for starting reproduction is performed.

8. Each decoding unit 15c, 15d, 15e
Perform the initial setting of.

9. Performs cell playback processing to be described later and checks whether playback is finished. If it is finished, error check is performed. If there is an error, a message to that effect is displayed. If it is not an error, playback termination processing is performed. To end this operation.

10. The next cell is determined from the PGCI, and it is checked whether or not the settings of the decoding units 15c, 15d, and 15e have been changed. If the settings have been changed, the decoding unit 15 is set for the next sequence encoding (at the end of VOB).
Change attributes are set in the decoder unit 15 so that the settings of c, 15d, and 15e are changed.

11. It is checked whether the settings (resolution etc.) in the video decoding unit 15c have been changed, and if the settings have been changed, the settings are changed in the decoding units 15c, 15d, 15e after the last sequence encoding of the cell (VOB). The change attribute is set in the decoder unit 15 so that

12. It is checked whether the connection is seamless. If the connection is seamless, the video decoding unit 15
The operation mode of c is set to a free-run mode (a mode of decoding and displaying according to a video sync signal instead of decoding and displaying according to STC), a seamless connection flag is set, and processing of 9 is performed. Move to.

The cell reproduction processing operation will be described with reference to FIG.
This will be described with reference to the flowchart shown in

1. It is checked whether or not VOB_GI: TE (temporary erase flag) in VOBI is set. If active, this process is terminated and the process returns to the main routine. When TE = 1, VO that has been temporarily erased
B.

2. The start file pointer (logical block address) and end address file pointer (logical block address) of the cell are determined by PGCI and TMAPI, and the start FP of the cell is substituted as the read FP,
Set the remaining cell length to the value obtained by subtracting the start file pointer from the last file pointer.

3. The CDA process during reproduction is executed, and the read address and read size are determined from the start file pointer.

4. The CDA size to be read is compared with the remaining cell length, and if the remaining cell length is large, the remaining cell length is set to a value obtained by subtracting the CDA size to be read from the remaining cell length. If it is smaller, the read length is set to the remaining cell length, and the remaining cell length is set to 0.

5. Set the read length to the CDA length.

6. A read address, a read length, and a read command are set in the disk drive unit 21.

7. It is checked whether or not the transfer is completed, and if the transfer is not started, the process proceeds to step 6.

8. A value obtained by adding the read FP and the read length set in the process of 5 is substituted into the read FP, and it is checked whether or not the seamless connection is made. If the seamless connection is made, the decoder unit 15 is shifted to the normal mode,
Read SCR (System Clock Reference).

9. It is checked whether or not the transfer is completed. If it is completed, the remaining cell length is checked and "0" is set.
If it is not "0", the processing shifts to step 2, and if it is "00", this processing ends.

10. When the transfer is not completed, the key input is checked, and when special reproduction is performed, the direction is set, the read FP is calculated using TMAPI, and the CDA processing during special reproduction is performed. , This process ends. If not, the process moves to 8.

11. The target FP of special reproduction is obtained from TMAPI so as to skip a certain time. Further, at this time, a method of obtaining a FP by skipping a fixed number of VOBUs instead of a fixed time may be considered. At this time, when the end of the cell is reached, the next cell information is read by PGCI and the TMAP is read from the VOB number used by the cell.
I is selected (1 VAPI has 1 TM API), and the read FP is obtained in the same manner. If there are no cells left, the process ends there.

Here, the temporary erase flag is provided in M (Movie) _VOBI in VMG, as shown in FIG. That is, in this M_VOBI, M_VOB
I_GI (General Information) is included and this M_
A temporary erase flag is set in VOB_TY (Type) in VOBI_GI.

The temporary erase setting processing operation will be described with reference to the flowcharts shown in FIGS. 11 to 14. Also,
FIG. 15 shows screen transitions during the temporary erase setting process. Further, when it is necessary to divide the cells, the image is shown in FIGS. 7 (a) and 7 (b).

1. A time bar corresponding to the playback time of ORG_PGC is displayed, a cursor is displayed, and a reduced image corresponding to the cursor is displayed below the time bar.

2. The temporary erase range is set in VOBU units.

3. Check if the setting range is correct.

4. If the VOB division at the start point of the designated range is not necessary, the process moves to 11.

5. Select the VOB to be divided (VOB
#N).

6. In order to change the VOBI of VOB # n, first, there is a possibility of changing the VOB in the VOBI.
_S_PTM, VOB_E_PTM, TMAPI are saved in the work RAM.

7. The end PTM of VOBU # m-1 immediately before the VOBU of the specified range start PTM is the VO of VOB # n.
Set to B_E_PTM (specify END of VOB # n).

8. TM_EN after VOBU # m-1
T and VOBU_ENT are deleted, TMAP_GI TM
The number of _ENT and VOBU_ENT is set to T
Change the value by reducing the number of M_ENT and VOBU_ENT.

9. Leave a space for recording a new VOBI after VOB # n. 10. Record a new VOBI in the free space with the following contents.

VOB_TY, VOB_REC_TM,
VOB_REC_TM_CUB, M_VOB_STI
N: Same as VOB # n ・ VOB_V_S_PTM: Specified range start PTM ・ VOB_V_E_PTM: Original VO of divided VOB
B_V_E_PTM-Set TM_ENT and VOBU_ENT from VOBU including the specified range start PTM to the end to TMAPI-Updated to the number of TM_ENT and VOBU_ENT of TMAP_GI added 11. If the VOB division at the end point of the designated range is not necessary, the process proceeds to step 18.

12. Specify the VOB to be divided (VO
B # k).

13. In order to change the VOBI of VOB # k, first, there is a possibility of changing the VOB in the VOBI.
_S_PTM, VOB_E_PTM, TMAPI are saved in the work RAM.

14. The end PTM of the VOBU of the designated range start PTM is set to VOB_E_PTM of VOB # k (END of VOB # k is designated).

15. TM_ENT and VOBU_ENT after VOBU of the specified range start PTM are deleted, and TMAP is deleted.
The number of TM_ENT and VOBU_ENT of _GI is updated to a value obtained by reducing the number of TM_ENT and VOBU_ENT erased previously.

16. A new VOBI behind VOB # k
Free up space for recording. 17. Record a new VOBI in the free space with the following contents.

VOB_TY, VOB_REC_TM,
VOB_REC_TM_CUB, M_VOB_STI
N: Same as VOB # k ・ VOB_V_S_PTM: Start PTM of VOBU next to specified range end PTM ・ VOB_V_E_PTM: Original VO of divided VOB
B_V_E_PTM-Set TM_ENT and VOBU_ENT from VOBU including the specified range start PTM to the end to TMAPI-Updated to the number added TM_ENT and VOBU_ENT of TMAP_GI 18. M_AVFI_GI to update VOB number
Among them, SRP_Ns is increased by the VOBI increased by the division, and the shifted SRP value is updated by the VOB division.

19. VOBI of the VOB within the specified range: V
Set the PROTECT flag in OB_TY.

20. It is determined whether or not there is VOB division, and if there is no VOB division, the process proceeds to step 34.

21. It is determined whether or not there is VOB division at the start of the designated range, and if there is no VOB division, the process moves to 27.

22. It is determined whether or not the division point is a cell break. If the cell is a break, it is not necessary to divide the cell. Therefore, only the VOB number is changed, and the process proceeds to 27.

23. Select and decide the cell to be divided.

24. C_V_E_PTM of cell #n
Updated E_PTM of divided VOB and updated E_P
If there is an entry point (EP) after the TM, the EPI of that EP is saved, deleted from this cell information CI, and EPI_Ns is reduced by the number of deleted EPs and updated.

25. Move one CI behind the CI of cell #n.

26. Record a new CI in the open space.

C_TY: the same as cell N, M_C_
GI: M_VOBI_SRPN is updated (VOB generated in division) C_V_S_PTM, C_V_E_PTM: S_PTM and E_PTM of VOB generated in division are updated / stored, and the EPI number added to EPI_Ns is updated 27. It is determined whether or not there is VOB division at the end of the designated range, and if there is no VOB division, the process proceeds to step 33.

28. It is determined whether the dividing point is a cell break, and if it is a break, only the VOB number is changed,
The process moves to the process of 33.

29. Select and decide the cell to be divided.

30. C_V_E_PTM of cell #m,
Updated E_PTM of divided VOB and updated E_P
If there is an entry point (EP) after the TM, the EPI of that EP is saved, deleted from this cell information CI, and EPI_Ns is reduced by the number of deleted EPs and updated.

31. Move one CI behind the CI of cell #m.

32. Record a new CI in the open space.

C_TY: the same as cell N, M_C_
GI: M_VOBI_SRPN is updated (VOB generated in division) C_V_S_PTM, C_V_E_PTM: S_PTM and E_PTM of VOB generated in division are updated / stored, and the EPI number added to EPI_Ns is updated 33. VOB number (M_C_G) in CI other than the division point
I: M_VOBI_SRPN). Also, PG
Total number of cells in C_GI (CI_SRP_Ns), P
Information such as the number of cells (C_Ns) in the GI and CI_SRP is also updated to the changed information. In addition, UD (User Define
If d) _PGCI also exists, similar processing is required.

34. Let the user select and decide whether or not the temporary erase setting has been completed. If not, 2
When the process is completed, the process ends.

The erase recovery is performed in cell units. The processing operation at this time will be described with reference to the flowchart shown in FIG. Further, FIG. 17 shows the screen transition at the time of this recovery from erasure.

1. Click the trash can mark (choose to display the trash PGC).

2. A time bar corresponding to the playback time of the trash PGC and a cursor for designating a cell are displayed. Also, to show that it is a trash PGC,
Display "Contents of Recycle Bin".

3. The user specifies the erase cancel cell with the cursor and marker keys.

4. It is confirmed whether or not the specified cell can be erased. If it is not possible, the process proceeds to step 6.

5. T of the specified VOB of the specified cell
Reset E (set to 0) and trash PGC
The cell that has been restored is removed, and the process ends.

6. It is confirmed whether or not the specified cell can be erased, and if it cannot be erased, the process proceeds to step 2.

7. The VOB specified by the specified cell is V
Erase from RO file, remove erased cell from trash PGC, and update VOB number in all PGCI (V
Since the OB has been erased, the V after the erased VOB
When the OB number is carried up), this process ends.

When the trash PGC is not supported, the above processing does not perform the reproduction processing according to the trash PGC, but directly executes the TE in the VOBI.
Looking at the flags, the VOBI of the active VOB
Create a time bar and play it according to the time bar.
The active ones of the TE flags of VOBI are sequentially reproduced, the temporary erasure is canceled, and the main erasing process is performed.

Further, in the disk organizing mode, it may be possible to automatically erase the cells that have been temporarily erased. This disk organization mode is, for example, Japanese Patent Application No. 9-34.
As described in No. 3041, there is no free space during recording (when the remaining capacity is below a certain amount), or when the user specifies it is a mode that shifts. This is to automatically erase the temporarily erased cells inside.

FIG. 1 shows the disk organization processing operation.
This will be described with reference to the flowchart shown in FIG. Further, FIG. 19 shows screen transitions during the disk organizing process.

1. Display on the TV screen to start disc organizing.

2. The disk organization process is designated for the disk drive unit 21 (to the process 1 of the disk drive unit 21 described later).

3. The fact that the disc is being organized is displayed on the TV screen.

4. Wait for the return value (status) from the disk drive unit 21 (from processing 5 of the disk drive unit 21).

5. It is checked from the status whether or not there is a deleted VOB, and if there is a deleted VOB, the process proceeds to step 6 and if not, the process proceeds to step 7.

6. Recalculate remaining time.

7. The fact that the disc organization has been completed is displayed on the TV screen, and the remaining time is displayed.

Further, the disk drive unit 21 at this time
The processing operation of will be described below.

1. It is searched whether there is a trash PGC, and if there is no trash PGC, the process proceeds to step 6.

2. Read PGCI of trash PGC.

3. Delete the VOB indicating all cells in the trash PGC from the VRO file, and delete the trash PG
Erase C.

4. The status with deleted VOB is set.

5. The status is output to the MPU unit 13,
This process ends and the process moves to another process.

6. There is no deleted file status,
The process moves to step 5.

As a result, the VRO data is organized, and if there is a temporary erase VOB, the recording space increases,
You will be able to record again.

Here, when the trash PGC is not supported, the above process does not perform the process according to the trash PGC, but directly looks at the TE flag in the VOBI, and processes by the VOBI of the active VOB. To do.

Further, as described above, the erasing level setting can be designated in a finer unit. That is, since the temporary erase setting is made in units of VOBU,
If the cell division is necessary and then the cell division is necessary, the cell division can be further performed, so that the data management can be performed finely.

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.

[0151]

As described above in detail, according to the present invention,
It is possible to provide an extremely good information recording medium and information recording / reproducing apparatus that can finely set the unit for performing the temporary erasing process and thus can perform fine data management.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of an information recording medium and an information recording / reproducing apparatus according to the present invention, and is a diagram for explaining an RTR-DVD directory structure.

FIG. 2 is a diagram shown for explaining a hierarchical structure of a VOBS in the same embodiment.

FIG. 3 is a diagram for explaining the content of CI in the same embodiment.

FIG. 4 is a block diagram showing a recording / reproducing apparatus according to the first embodiment.

FIG. 5 is a flowchart shown to explain a recording operation in the same embodiment.

FIG. 6 is a flowchart shown to explain an interrupt operation at the time of recording in the same embodiment.

FIG. 7 is a diagram for explaining an image of VOB division according to the first embodiment.

FIG. 8 is a flowchart shown to explain a reproducing operation in the same embodiment.

FIG. 9 is a flowchart shown to explain a processing operation during cell reproduction in the same embodiment;

FIG. 10 is a diagram shown for explaining the contents of M_VOBI_GI in the embodiment.

FIG. 11 is a flowchart shown to explain a temporary erase setting processing operation in the same embodiment;

FIG. 12 is a flowchart shown to explain a temporary erase setting processing operation in the same embodiment;

FIG. 13 is a flowchart shown to explain a temporary erase setting processing operation in the same embodiment;

FIG. 14 is a flowchart shown to explain a temporary erase setting processing operation in the same embodiment;

FIG. 15 is a diagram shown for explaining a screen transition at the time of temporary deletion setting processing in the embodiment.

FIG. 16 is a flowchart shown for explaining erase recovery and main erase processing operations in the same embodiment.

FIG. 17 is a diagram for explaining screen transitions during erase recovery and main erase processing in the same embodiment.

FIG. 18 is a flowchart shown to explain a disk rearrangement processing operation in the same embodiment;

FIG. 19 is a diagram for explaining screen transitions during the disk organizing process in the same embodiment.

[Explanation of symbols]

11 ... Optical disc, 12 ... A / V input section, 13 ... MPU section, 14 ... Display, 15 ... Decoder part, 16 ... Encoder part, 17 ... TV tuner section, 18 ... STC section, 19 ... D-PRO section, 20 ... Temporary storage section, 21 ... Disk drive section, 22 ... key input section, 23 ... V mixing section, 24 ... Frame memory section, 25 ... TV receiver, 26 ... D / A converter, 27, 28 ... I / F section, 29 ... speaker.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ identification code FI H04N 5/85 G11B 27/02 K (58) Fields investigated (Int.Cl. ⁷ , DB name) G11B 20/10 G11B 20 / 12 G11B 27/00 H04N 5/91 H04N 5/85

Claims (4)

(57) [Claims] 1. A method for recording information on an information recording medium, wherein, for data in a data area of the information recording medium, a set of a plurality of video packs and audio packs is defined as a video object unit (VOBU) , A video object (VOB) is defined by aggregating the video object units (VOBU) , and regarding the management information of the management information area of the information recording medium, a program chain for reproducing at least a part of the video object. Information (PGCI) is defined, and a plurality of cell playback information is included in this program chain information.
(CI) is included, each cell playback information includes a search pointer number (M_VOBI_SRPN) that specifies video object information, and the video object information (VOBI) specified by the search pointer number includes , Video object information in general
Information (M_VOBI_GI) and time map information (T
MAPI) and the time map information (TMAPI) includes a time map.
Pre-entry information (TM_ENT), the video object
Information of the video unit in the project (VOBU
_ENT) is included, and the entry information is
Of the video object unit to be entered
Playback time information (VOBU_PBTM) is included, and the video object information general information (M_VOBI_ ) is included.
GI) indicates whether the video object is temporary erase or normal.
Type information (VOB) including a temporary erase flag (TE) indicating
_TY), video object start time, end
When the temporary deletion flag is added to the video object, the current video object is divided if the end of the addition range of the temporary deletion flag is not the boundary of the video object including the time information. which is to create a video object information for those who remain out of the divided video object, and a video object information for video objects temporary erase flag of the divided video object is added
The video object to which the temporary deletion flag is added
The video object information for the time entry
-(TM_EMT), video object unit (V
An information recording method characterized by recording information of the number of OBUs) . 2. A method for reproducing information to an information recording medium having a data area and a management area, wherein, regarding data in the data area of the information recording medium, a set of a plurality of video packs and audio packs is a video object unit (VOBU). ) , A plurality of video object units (VOBU) are aggregated to define a video object (VOB) , and management information in the management information area of the information recording medium is at least part of the video object. Program chain information (PGCI) for reproducing a plurality of cell reproduction information is defined in the program chain information.
(CI) is included, each cell playback information includes a search pointer number (M_VOBI_SRPN) that specifies video object information, and the video object information (VOBI) specified by the search pointer number includes , Video object information in general
Information (M_VOBI_GI) and time map information (T
MAPI) and the time map information (TMAPI) includes a time map.
Pre-entry information (TM_ENT), the video object
Information of the video unit in the project (VOBU
_ENT) is included, and the entry information is
Of the video object unit to be entered
Playback time information (VOBU_PBTM) is included, and the video object information general information (M_VOBI_ ) is included.
GI) indicates whether the video object is temporary erase or normal.
Type information (VOB ) including a temporary erase flag (TE) indicating
_TY), video object start time, end
When the temporary deletion flag is added to the video object, the current video object is divided if the end of the addition range of the temporary deletion flag is not the boundary of the video object including the time information. which is to create a video object information for those who remain out of the divided video object, and a video object information for video objects temporary erase flag of the divided video object is added
The video object to which the temporary deletion flag is added
The video object information for the time entry
-(TM_EMT), video object unit (V
OBU) number information is recorded, and when reproducing a plurality of the video objects based on the program chain information and the video object information, the reproduction of the video object to which the temporary erase flag is added is omitted. An information reproducing method characterized by the above. 3. In an information reproducing apparatus for an information recording medium having a data area and a management area, regarding the data of the data area of the information recording medium, a set of a plurality of video packs and audio packs is a video object unit (VOBU). ) , A plurality of video object units (VOBU) are aggregated to define a video object (VOB) , and management information in the management information area of the information recording medium is at least part of the video object. Program chain information (PGCI) for reproducing a plurality of cell reproduction information is defined in the program chain information.
(CI) is included, each cell playback information includes a search pointer number (M_VOBI_SRPN) that specifies video object information, and the video object information (VOBI) specified by the search pointer number includes , Video object information in general
Information (M_VOBI_GI) and time map information (T
MAPI) and the time map information (TMAPI) includes a time map.
Pre-entry information (TM_ENT), the video object
Information of the video unit in the project (VOBU
_ENT) is included, and the entry information is
Of the video object unit to be entered
Playback time information (VOBU_PBTM) is included, and the video object information general information (M_VOBI_ ) is included.
GI) indicates whether the video object is temporary erase or normal.
Type information (VOB) including a temporary erase flag (TE) indicating
_TY), video object start time, end
When the temporary deletion flag is added to the video object when the end of the addition range of the temporary deletion flag is not the boundary of the video object including the time information , the current video object is divided. which is to create a video object information for those who remain out of the divided video object, and a video object information for video objects temporary erase flag of the divided video object is added
The video object to which the temporary deletion flag is added
The video object information for the time entry
-(TM_EMT), video object unit (V
OBU) number information is recorded, and when a plurality of the video objects are reproduced based on the program chain information, the reproduction of the video object corresponding to the video object information to which the erasure flag is added is not executed. An information reproducing apparatus having means for shifting to reproduction of the video object. 4. An information recording medium recorded by the recording method according to claim 1.