JP2000260163A - Recorder and reproducer of information - Google Patents

Abstract

PROBLEM TO BE SOLVED: To record a picture considering CDA by constructing a CDA table based on the information on recording media, constructing a video manager VMG containing the information on this CDA table, and recording video information on a recording medium based on these constructed information. SOLUTION: In a processing at the time of starting picture-recording, a file system is checked, and if no file exists, a file system, DVD-RTR directory, is constructed, and CDA table is created by checking a space file extent. Moreover, it is checked whether or not VMG is contained in a DISK, and if it is not contained therein, a VMG table is constructed in work memory, and if it is contained therein, the VMG table is read from the DISK and developed in work RAM of a MPU. And this processing is ended with the CDA processing for starting picture-recording.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a video information recording apparatus.

[0002]

2. Description of the Related Art In recent years, an optical disk reproducing apparatus for a moving image, which reproduces an optical disk on which data such as video and audio data is recorded, has been developed, and is generally used for movie software, karaoke, and the like, such as LD and video CD. Widespread. Among them, MPEG2 (Movin
g Image Coding Expert Gro
Up), a DVD standard that uses the AC3 audio compression method has been proposed. This standard is MPEG2
According to the system layer, the video compression method is MPEG2,
It supports AC3 audio and MPEG audio as audio, and further includes sub-picture data obtained by run-length-compressing bitmap data for subtitles, and control data (navi pack) for special playback such as fast forward / rewind. . In addition, this standard specifies that ISO 9660 should be used so that data can be read by a computer.
And micro UDF are supported. Further, as a standard of the medium itself, following the DVD-ROM which is a medium used in DVD-Video, a DVD-RAM standard (2.6 GB) has been completed, and a DVD-RAM drive has also been used as a computer peripheral device. It is beginning to spread.

[0003] Therefore, RTR-DVD (Real Time Record), which is a DVD video standard capable of real-time recording and reproduction using the DVD-RAM.
er) standards are being completed and will be published in the spring of 1999. This standard is considered based on the DVD-Video standard currently on the market. further,
A standard for a file system compatible with the RTR-DVD is currently being created. Here, while recording in real time,
A minimum unit of continuous AV data is specified so that continuous playback is possible even when a defect or jump occurs. This unit is defined as CDA (Contiguous Data Are).
It is defined in units called a).

[0004]

The limitation of the CDA block is that the CDA length is a fixed length and is continuously arranged on the disk, and the length is an integral multiple of the ECC block. So, in RTR-DVD,
It is considered that the recording / reproducing process using the CDA is defined. However, in a conventional device capable of recording a video signal, no device has been developed which performs recording processing on a DISC-like medium by defining a unit such as CDA. For example, in the case of a DVD-RAM, if there is a free area, the data is recorded irrespective of the above-mentioned continuous unit of a fixed length. When recording a video signal on a medium compatible with a PC in real time, the processing taking into account the CDA is not specified, so that the conventional recording method cannot continuously reproduce the recorded video data. There was a problem. SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to propose a recording apparatus capable of performing a recording process in consideration of CDA.

[0005]

In order to achieve the above object, a video information recording apparatus according to the present invention comprises: a CDA table construction section for constructing a CDA table based on information about a recording medium at the start of recording; A VMG constructing unit for constructing a VMG having information relating to the table, and video information is recorded on a recording medium based on the information constructed by these constructing units.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In DVD-Video, data is stored in a normal file format. The title corresponds to, for example, one movie, and one disc includes a plurality of titles. A collection of the titles is called a title set, and the title set is composed of a plurality of files. In addition, in a recording / reproducing DVD, one moving image VOBS file exists on one disc,
The original PGC records the reproduction order used when reproducing in the recording order. In the case of DVD, a directory exists for each standard, and in the case of DVD-video, VI
AUDIO for DEO TS and DVD-Audio
The TS and the recording / reproducing DVD use the DVD RTR. Each recording data exists in this directory (see FIG. 2). In DVD-Video, one disc contains VMG as information for managing this disc.
There is a file called (VIDEO MANAGER). This management information exists in the management area of the recording medium. In addition, information for managing this VTS is included in a video title set (hereinafter referred to as VTS).
(Information) management information file, a video file composed of video data, and a VTSI backup file.

According to the recording / reproducing standard, the VMGI and the VT
The VM is configured by combining the SIs, and a video data file is managed. As shown in FIG. 3, the video files are managed in a hierarchical structure, one video object set (VOBS) is composed of a plurality of VOBs, and one VOB is composed of a plurality of cells. One cell is composed of a plurality of video object units (hereinafter referred to as VOBUs). Also,
The VOBU is configured by a pack including 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, the pack is the minimum unit for performing the data transfer process. Further, the minimum unit for performing logical processing is a cell unit, and the logical processing is performed in this unit. The order in which data is reproduced is defined by a PGC (Program Chain). A plurality of PGs (Programs) are registered in the PGC, and cells are registered in the PGs. This PG
PGCI actually records the structure of C. The reproduction process is performed according to the PGCI, and the PGCI is created at the time of recording or editing.

In a recording / reproducing DVD, a special PGC for reproducing in the recording order is called an original PGC, and information of the original PGC is recorded in ORG_PGCI.
Embodiments of the present invention will be described below. As shown in FIG. 1, the recording / reproducing apparatus according to the present embodiment includes an MPU unit 1, a display unit 2, a decoder unit 3, an encoder unit 4, a TV tuner unit 5, an STC
Unit (System Time Clock) 6, D-PRO unit 7, temporary storage unit 8, drive unit 9, key input unit 10, V mixing unit 11, frame memory unit 12, D / A unit 13 for TV
It consists of. A / D in the encoder unit 4
Section, video encoding section, audio encoding section, S
The decoding unit 3 includes a P encoding unit, a formatter unit, and a buffer memory unit. The decoding unit 3 includes a separation unit, a video decoding unit, an SP (Sub-Picture) decoding unit, an audio decoding unit, a V-PRO unit, and an audio D / A.
Section. The flow of the video signal in the embodiment is as follows. First, the input AV signal is digitally converted by the A / D unit of the encoding unit 4. The digital signal is input to each encoder unit. That is, a video signal is sent to a video encoding unit, an audio signal is sent to an audio encoding unit, and character data such as teletext is sent to the SP.
The video signal is MPEG-compressed, the audio signal is subjected to AC3 compression or MPEG audio compression, and the character data is run-length compressed.

When each encoder section performs compression data pack formation, it packs the data into packs of 2048 bytes and inputs them to the formatter section. The formatter unit packs and multiplexes each packet, and
Each time the data is stored, the compressed data is sent to the D-PRO unit. At this time, for example, a VOBU is set for each GOP, the segmentation information at that time is stored in the buffer memory unit, and when the segmentation information has accumulated to a certain extent, it is transferred to the MPU unit. Based on the information, the MPU unit executes TIME MAP Info. Create (Sent at the time of a GOP head interrupt or the like.) Here, as the segmentation information (VOBU information), VO
BU size, playback time from beginning to end of VOBU,
The end address of the I picture from the head of the VOBU can be considered. It is also conceivable that the formatter unit directly creates Time Map Information based on the above-mentioned segmentation information and passes it to the MPU unit in the form of TMP. DVD-RAM
In the case of (1), it is stipulated that one ECC is composed of 16 sectors. In the D-PRO unit, an ECC block is formed for every 16 packs, error correction data is added to the compressed data and information, and the disk drive unit discs. Will be recorded.

When the drive unit is busy due to a seek or a track jump, it is temporarily stored in the storage unit and waits until the drive unit is ready. In addition, the video file is 1DI
One file is stored in the SK. Here, in a real-time recording / reproducing apparatus using a DVD, a point to be noted is that when accessing reproduction data for a moving image, at least the reproduction is continued without interruption during the access (seek). Limited continuous sectors are required. This unit is called CDA (Contiguous Data area). The CDA is a unit of ECC Block as a limiting condition. Therefore, as shown in FIG. 4, the file system has a table for managing the CDA. The CDA size of the CDA table is set to N times (N is a natural number) of 16 sectors, and C
The DA size is represented by the number of ECC Blocks. In the initial state, the start address of the effective data area in the zone is matched with the start address of the first CDA in the zone. In FIG. 4, as an example, the CDA size is set to 3564.
Sector: 7 MBytes. The CDA table is
The “CDA start address”, the “CDA size” at that time, and the “next CDA number” are recorded. In the last CDA used, “0xffff” (end code #) is recorded at the “next CDA number”. In the initial stage, all are "0x00". In addition, CD
At the end of the A table, 7-byte “0xff” is added as an end code.

For the first CDA, a file system, a VMG data area, and the like are required.
It is necessary to be able to make a unit of 6 sectors. When the disc is not in the initial state, that is, when some data is recorded, the CDA is configured in an unused area.
In some cases, the start of the zone and the start CDA start address in the zone may not match.
The start address of DA is determined. After the end code added to the CDA table, the CDA number of the first recorded CDA and the number of data used by the last CDA are recorded. As a result, when recording next, recording can be performed from the area next to the sector used for the last CDA. FIGS. 5 and 6 show MAVFITI (Mo) of VMG for managing video data.
viewAV File Information Ta
3 shows an ORG PGCI file hierarchical structure for controlling a file hierarchical structure and a reproduction order of the ble information (ble information). In the file system (file management data), in order to manage data in CDA units,
The CDA table is recorded as a dedicated file extent.

Of these, M_AV
In the FITI area, TMAPI (Time Map I
nformation) and PGC
Set I. This setting is performed by ORG_PGCI, and the contents recorded in CDA units are reflected in the CDA table. When recording is performed in CDA units, the following two types of CDA alignment methods can be considered as processing at the end of recording. First of all, CDA at the end of recording
Ends in the middle of the process, and the end point at that time is ECC
This is the case in the middle of a block (FIG. 7). In this case, E
Record a dummy pack until the CC block ends and
Complete the CC block. (Dummy pack is MPE
It is a pack composed of dummy packets defined in the G system layer. The second is a case where data ends in the middle of CDA at the end of recording (FIG. 8). In this case, the dummy pack is recorded until the CDA is completed to complete the CDA block. In the second method, a method is also conceivable in which only the CDA length of intermediate data is changed and no dummy is inserted. Here, the recording (recording) processing will be described with reference to the flowcharts of FIGS. (1) The file system data on the disk is read, and it is checked whether or not there is free space. If there is no free space, the fact is displayed and the processing is terminated.

(2) In some cases, a pre-recording process described later is performed to determine a write address. (3) Initialize recording for each encoder.
At this time, PG, CELL, VO
A BU delimiter condition is set, and data is automatically delimited according to this setting. When performing the alignment processing, the setting is performed in the formatter unit. (4) Set a recording start command in the encoder section. (5) When the first 1 CDA is stored in the buffer memory unit, the write address and the write length are written to the drive unit.
Issue a write instruction. (6) It is checked whether or not the separation information has been stored. If the separation information has been stored, the separation information is read from the formatter unit. (7) Check whether data for 1 CDA has been stored in the buffer memory unit.
Move to (9). (8) If the data is stored, a CDA process during recording described below is performed, and a recording address, a recording length, and a recording command are sent to the drive unit. (9) Check whether the recording end key has been entered,
If there is a stop key input, the flow shifts to (12). (10) The remaining amount is checked, and if the remaining amount falls below a certain amount, the disc is organized, and if there is still no capacity, a message to that effect is displayed.

(11) It is checked whether or not there is no recordable capacity. If there is, the process proceeds to (6). (12) A recording end process described later is performed. Becomes Among them, the processing at the start of recording will be described according to the operation flow of FIG. (1) Check the file system. If there is no file system, construct a file system and a DVD-RTR directory and check a free file extent to create a CDA table (FIG. 4) (later).
Move to (4). Here, the constructed initial state CDA
The table may be stored in an area specified by a file system in the disk. If you do n’t save it here,
At the end of recording, the CDA table having updated contents may be stored in a form reflecting the recorded contents. (2) Check whether the RTR directory exists, and if not, create an RTR directory, create a CDA table, and proceed to (4). (3) The presence or absence of the CDA table is checked, and if not, the CDA table is constructed in the work memory in the MPU shown in FIG. (4) An error check is performed, and if an error occurs in the above steps (1) to (3), "Error has occurred in the file system" is displayed, and the process ends.

(5) It is checked whether the VMG is in the disk. If not, the VMG is stored in the work memory.
A G table is constructed, and in some cases, a VMG table is read from DISK and expanded in the work RAM of the MPU. Here, the constructed VMG in the initial state may be saved as a file in the area specified by the file system in the disk. Here, even if you do not save, at the end of recording,
What is necessary is just to save the VMG of the updated content reflecting the recorded content. (6) An error check is performed, and if an error occurs, a message “Creation of management data could not be created” is displayed and the process ends. (7) Perform CDA processing at the start of recording, and end this processing. When constructing a CDA table, it is necessary to change the CDA length depending on the recording rate, the average seek time of the drive, and the like. At least, a capacity that does not stop reproduction during the access time + α from the innermost circumference to the outermost circumference of the disk is required. However, the CDA length is ECC
In order to make a block unit, it is a multiple of 16 sectors.
As described above, the CDA table contains a CDA start address, a CDA length (which can be represented by the number of sectors or the number of ECC blocks or an end address), and the next CDA.
, The CDA number starting first is considered to be the minimum required. Further, in order to perform the FR process efficiently, the previous CDA number or the like may be recorded.

The following three types of timings can be considered as the timing for performing the above-described pre-recording processing. First, it is a method that is performed immediately when a disc is inserted.This method has the advantage that recording can be started immediately after pressing the recording key, but it takes a little time for preparation when the disc is inserted. Will be. Second, there is a method that is performed when the format button is pressed, but this method has a drawback that a format key must be used before recording. Third, there is a method in which recording is performed at the start of REC. In this method, a slight time lag occurs after the recording key is pressed until the start of recording, but data during that time needs to be stored in the temporary storage unit. It is becoming. In the above flow, if there is already a CDA table, that table is used to record the previously recorded data, but in the case of a refresh operation, all files are erased and the CDA table is deleted. Without checking the table, the initial C
It may be necessary to overwrite DA. (Creation of a refresh key or the like) Further, a process of creating a CDA table at the initial stage (when all files are not present and the CDA table is not present on the disc) will be described with reference to the operation follow in FIG. However, at this time, data of the data valid start address and the data valid zone size of each zone are required. This is determined for each type of medium.
DVD-RAM table is used.

Here, the zones will be described. DVD
In the disc of zone CLV (Constant Linear Ve
locity). In this method, a disk is divided into zones, and recording and reproduction are performed with a constant linear velocity in the zone. The drive unit needs to change the rotation speed of the disk each time it passes this zone. Therefore, if there is a zone break in the CDA, continuous reading may not be guaranteed. Therefore,
By cutting the CDA so as not to cross this zone, stable reading in the CDA is guaranteed. (1) The determined CDA size is loaded into the work of the MPU unit, and 0 is loaded into d (the number of CDAs). (2) Prepare for repeating the following process by the number of zones. (The loop from (2) to (6) is performed while i = 0 to 23.) (3) d is incremented, the zone start address is set as the start address of the d-th CDA, and the CDA size is taken into the work. And the next CDA number is set to 0. Further, the zone start address is taken into add. (4) Preparation is made to repeat the following processing by the number of times of the zone back number / CDA size-1. (K = number of zone backs / CDA size minus 1, from (5) to (6)
Loop until (5) Save add + CDA size in add.

(6) d is incremented, the value of add is set as the start address of the d-th CDA, the CDA size is set as the size taken into the work, and the next CDA number is set to 0. (7) The end code "-" is added to the d + 1-th of the CDA table.
0xff "is recorded in 7 bytes, followed by the start C
“0x0000” is stored as the DA number and the last recording address in the end CDA. The operation of the process at the end of recording will be described with reference to the operation flow of FIG. (1) Perform CDA processing at the end of recording. (2) Update the VMG in the work based on the separation information received from the formatter unit. (3) Check whether the VOBS file (VRO file) exists in the directory record information under the RTR_DVD directory in the file system, and if so, update the information of the VRO file (to the information of the recorded video file). If not, the directory record information of the VRO file is added to the directory (to the information of the recorded video file). (4) Check whether there is a CDA table, and
If there is no table, the CDA table in the work is recorded at the position specified by the file system. If there is a CDA table, the CDA table is updated to the CDA table constructed in the work.

(5) In the directory record information under the RTR_DVD directory, an IFO file (VM
G file), and if not, records the VMG constructed in the work in a free area and
The information of the IFO file is added to the directory record information under the DVD directory.
Update from the VMG in the work to the location of the file, RTR
Update the directory record information under the _DVD directory. Next, the operation of the CDA process at the start of recording will be described with reference to FIG.
This will be described by following the operation follow. (1) Read the starting CDA number from the CDA table. (2) If the start CDA number is "0000", it means that there is no recorded CDA, and the process proceeds to (6). (3) Read out the CDA number connected next to the CDA specified by cda-num, and take it into cda-num. (4) Check whether cda-num = "0xffff", and if not equal, shift to (3). (5) The sum of the start address of the CDA specified by cda-num and the value of End address in End CDA is used as the recording start address, and End is determined from the CDA size at that time.
The value obtained by subtracting the value of address in End CDA is set as the recording size, and the process ends.

(6) The CDA start address of the first CDA number is used as the recording start address, and the CDA at that time is used.
Use the size as the recording size and enter "0x000" in the start CDA number.
1 "is set, and the processing is terminated. The operation of the CDA processing during recording will be described with reference to the operation follow in FIG. 15. (1) The last recorded CDA number is taken out and unused by the CDA after that number (Next CDA number = “0000”), and if the CDA table has not been found, and there is no CDA that can be recorded, that fact is returned to the main routine and the processing is terminated. If there is a CDA, the start address and CDA size of the found unused CDA are used as the recording address and recording size for the next recording, and the CDA number next to the last recorded CDA item in the CDA table And set the unused CDA number found in now_cda, and terminates the present process.
This will be described by following the operation follow. (1) The last recorded CDA number is taken out, an unused CDA is searched for in the CDAs after that number (next CDA number = “0000”), and if the CDA table has not been found, the CDA that can be recorded is Since there is no such information, the effect is returned to the main routine and the processing ends.

(2) If there is an unused CDA, the start address of the found unused CDA and the number of remaining unrecorded data to be recorded are used as the recording address and recording size for the next recording. , Set “0xffff” as an end code at the CDA number next to the CDA item recorded last in the CDA table,
inEnd Sets the number of remaining data to be recorded in CDA, and ends this processing. When the recording ends, the formatter unit receives the recording end command, performs ECC block alignment, and ends. At this time, if the ECC block has not been reached, a dummy pack is generated to complete the ECC block. At the end of VOB, if CDA
When performing alignment, a dummy pack is generated at this time to complete CDA. If the CDA length is changed without performing CDA alignment, the last CDA
Change the length. Further, data processing at the time of reproduction is as follows.
(Figs. 17 and 18) (1) Check the disc and rewritable Disc (R, R
W, RAM) and check if it is a rewritable Disc
If not, return that effect and end.

(2) The file system of the disc is read, and it is checked whether or not there is a volume structure. If there is no volume structure, "not recorded" is displayed and the process ends. (3) Check if there is a DVD_RTR directory, and if not, display "not recorded" and end. (4) Check if there is a CDA table,
If there is no record, "Not recorded" is displayed and the processing ends. (5) Check if there is a VRO file,
If there is no such file, no recording is displayed. "(6) The VMG file is read, the program and cell to be played are determined (the user is allowed to select), and the file pointer (logical address) to start playing is determined. (7) Perform CDA processing at the start of reproduction (8) Initialize each decoder (9) Perform cell reproduction processing (later), check if reproduction is completed, and end In the case of (1), an error check is performed, and in the case of an error, a message to that effect is displayed, and in the case of no error, reproduction end processing is performed, and the present operation is terminated. (10) The next cell is determined from the PGCI. It is checked whether the setting of the decoder is changed, and if it is changed, the decoder is changed so that the setting of the decoder is changed at the next sequence end code (at the end of the VOB). To set the gender.

(11) It is checked whether or not the setting (resolution, etc.) for the video decoder section has been changed. If the setting has been changed, the setting change to the decoder is performed after the last sequence end code of CELL (VOB). The changed attribute is set to the decoder so that the operation is performed. (12) It is checked whether the connection is seamless or not. If the connection is seamless, the operation mode of the video decoder is set to a free-run mode (a mode in which decoding and display are performed not according to STC but according to a video synchronization signal). Is set, the seamless connection flag is set, and the routine goes to (9). The cell reproduction process is as follows. (Figure 1
8) (1) The start file pointer (logical block address) and end address file pointer (logical block address) of the cell are determined by PGCI and TMAPI.
The start FP of the cell is substituted for the read FP, and the value obtained by subtracting the start file pointer from the last file pointer is set to the remaining cell length. (2) The CDA process during reproduction (later) is executed, and the read address and the read size are determined from the start file pointer. (3) The CDA size to be read is compared with the remaining cell length. If the remaining cell length is large, a value obtained by subtracting the CDA size to be read from the remaining cell length to the remaining cell length is set. If smaller, the read length is set to the remaining cell length, and the remaining cell length is set to zero.

(4) The read length is set to the length of the CDA. (5) Read address, read length,
Set the read command. (6) It is checked whether or not the transfer is completed, and if the transfer is not started, the process proceeds to (6). (7) Substitute the readout FP with the readout FP plus the readout length set in (5), check whether the connection is seamless or not, and if the connection is seamless, shift the decoder to the normal mode. Read. (8) It is checked whether or not the transfer has been completed. If the transfer has been completed, the remaining cell length is checked. If it is not "00", the process proceeds to (2). To end. (9) If the transfer is not completed, check the key input, and if performing the special playback, set the direction,
The read FP is calculated using the TMAPI, the CDA process at the time of special reproduction is performed, and the process ends. If not, proceed to (8). The purpose FP for trick play is
FP is obtained from TMAPI so as to skip a certain time. At this time, a method is also conceivable in which the FP is obtained by skipping a certain number of VOBUs instead of a certain time. At this time,
When the operation is performed to the end of the cell, the next cell information is read by the PGCI, the TMAPI is selected from the VOB number used by the cell (1TMAPI is present in one VOB), and the read FP is similarly obtained. When there are no more cells, the process ends.

Here, the CDA processing at the start of reproduction is as follows. (FIG. 19) (1) The first recorded CDA number is read, and cda_
Read in num, read_pt (read pointer), old-pt
(Previous read pointer) is set to 0. (2) First, it is checked whether the recorded CDA number is "0x0000". If the CDA number is "0x0000", "No data to be reproduced" is displayed and the process is terminated. (3) CDA of CDA indicated by cda-num in read-pt
Insert the sum of the length and read-pt contents. (4) The value of read-fp (the file pointer (LBN) to be read) is compared with the value of read-pt. If the value of read-fp is larger, the old-pt is substituted into read-pt and old −
Substitute cda-num for cda, substitute the next CDA number for cda-num, and proceed to (3). (5) If read-pt and read-fp are equal, cda-nu
This processing is ended with the start address of the CDA indicated by m as the read address and the CDA length as the read size. (6) If read-fp is smaller than read-pt, old-fp
Let cda (the previous CDA) be the target CDA, read the start address of the CDA indicated by old-cda,
This processing is ended with the DA length as the read size.

Further, the CDA processing during reproduction is as follows. (FIG. 20) (1) Substitute the value of now-cda for cda-num and determine the next CDA number (cda-table [5: 6] [cda-num-
1]), and substitute read-pt for old-pt. (2) The read-pt is obtained by adding the CDA length of the CDA indicated by cda-num and the contents of the read-pt. (3) Compare the value of end-fp (file pointer (LBN) for reading end) with the value of read-pt. If read-fp is larger, proceed to (4); if smaller, read-pt Move to (5). (4) The start address of the CDA indicated by cda-num is the read address, and the CDA length is the read size.
Move to. (5) The read address is the start address of the CDA indicated by cda-num, the value obtained by subtracting the read pointer one end before end-pt from the CDA length is the read size, and FILE-END is the argument. This processing ends. (6) It is checked whether it is the last CDA, and in the case of the last CDA, the read size is set to End address in End C
This processing is terminated by setting DA as read size # and setting the argument as END-CDA.

(7) In other cases, the read size is set to the CDA size, and the process ends. The CDA processing during special reproduction is as follows (shown in FIG. 21). (1) Substitute the value of now-cda for cda-num and determine the next CDA number (cda-table [5: 6] [cda-num-
1]), and substitute read-pt for old-pt. (2) The read direction is checked, and in the case of FF, the process proceeds to (3), and in the case of FR, the process proceeds to (7). (3) Read-pt is compared with read-fp (reading FP). If read-fp is large, the CDA length of the next CDA is added to read-pt, and it is checked whether or not it is the last CDA. In this case, the process ends with END-VOB as an argument. Otherwise, the process proceeds to (3). (4) If read-fps are equal, the start address of the CDA at that time is set as the read address, and the CDA size is set as the read size. (5) Compare the read size with the end address of I,
If the read size is small, a read command is issued to the drive unit, and after the data read is completed, the read size is subtracted from the end address of I to be the end address of I, and the start address of the next CDA and the CDA size are read addresses. The process proceeds to (5) as the read size.

If the end address is small, the read size is set to the end address of I, a read command is output to the drive unit, and this processing ends. (6) Search for the previous CDA (the CDA whose current cda-num value matches the jump destination CDA number).
Read the value obtained by subtracting the CDA length of the CDA found from ad-pt
−pt, read-pt and read-fp are compared, and read
If -pt is large, substitute old-cda for cda-num,
Move to (7). (7) If they are equal, the process proceeds to (4). If they are smaller, the process proceeds to (6). CDA not found CDA
If the table has been searched once, the process ends with END-VOB as an argument. In this way, using the CDA table, the video data file (VRO file) can be converted into a physical address by the file pointer, and recording and reproduction are performed by the physical address. Here, in the system using the PC, the setting to the drive unit is performed by the logical address. Therefore, the CDA table is constituted by the logical address, the logical address is obtained by the CDA processing, and the drive unit is set by the logical address. It is also conceivable to specify.

The CDA table according to the present invention can cope with a case where erasing or editing is performed and a case where the erasing or editing is performed in units of CDA. However, it is natural for users to edit over time (in video frames)
Probability is high. Therefore, the editing is not performed in units of CDA. Therefore, when the unit of erasing and editing is performed in VOBU units and in the case of frame units, the display start frame is shifted within the VOBU. Therefore, in the case of erasing or the like, the normal operation is performed in CDA units, and in the case of a unit smaller than that, the CDA length is reduced or the CDA start address is shifted to cope. However, if the change of the CDA table is repeated in this way, the efficiency becomes worse. Therefore, when the editing and erasing are repeated, it is necessary to arrange the CDA table at regular intervals (period), find an unused portion having a continuous CDA length, and set that portion as a new CDA. . The following two types of timings can be considered. First, the erase / edit is performed and the CDA table is rewritten a certain number of times as a trigger. Secondly, a certain time elapses and automatically performed at a vacant time.

As described above, the recording / reproducing operation in consideration of the CDA can be realized.

[0031]

As explained above, according to the present invention,
Since the CDA table and its related information are recorded, effective video data management can be performed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the overall configuration of an embodiment.

FIG. 2 is a diagram showing a directory structure of a DVD according to the embodiment.

FIG. 3 is a video object set of the present embodiment.
The figure which shows the hierarchical structure of (VOBS).

FIG. 4 is a view showing contents of a CDA table according to the embodiment.

FIG. 5 is a view showing the contents of C_PBI in the embodiment.

FIG. 6 is a view showing the contents of VOBU_ENT according to the embodiment.

FIG. 7 is a view showing how to end a final VOBU (an example of ECC block alignment processing) according to the embodiment;

FIG. 8 is a view showing how to end a final VOBU (an example of CDA block alignment processing) according to the embodiment;

FIG. 9 is a view showing a recording flow of the embodiment.

FIG. 10 is a diagram showing an interrupt flow at the time of recording according to the embodiment.

FIG. 11 is a diagram showing a pre-recording processing operation flow of the embodiment.

FIG. 12 is a diagram showing a CDA table creation processing operation flow at the initial stage of the embodiment.

FIG. 13 is a diagram showing a post-recording processing operation flow of the embodiment.

FIG. 14 is a view showing a CDA processing operation flow at the start of recording according to the embodiment.

FIG. 15 is a view showing an operation flow of a CDA processing operation during recording according to the embodiment.

FIG. 16 shows a CDA processing operation flow at the end of recording according to the present embodiment.

FIG. 17 is a diagram showing an overall reproduction operation flow of the embodiment.

FIG. 18 is a diagram showing a processing flow at the time of cell reproduction according to the present embodiment.

FIG. 19 is a view showing a CDA processing flow at the time of starting reproduction in the embodiment.

FIG. 20 is an exemplary flowchart showing a CDA processing operation flow during reproduction according to the embodiment;

FIG. 21 is a view showing a CDA processing flow at the time of special reproduction according to the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... MAIN MPU part 2 ... Display part 3 ... Decoder part 4 ... Encoder part 5 ... TV tuner part 6 ... STC 7 ... D-PRO part 8 ... Temporary storage part 9 ... Disk drive part 10 ... Key input part 11 ... Mixing part 12: Frame memory unit 13: D / A

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Shinichi Kikuchi 3-3-9, Shimbashi, Minato-ku, Tokyo Inside Toshiba ABU EE Co., Ltd. (72) Inventor Shuichi Hisatomi 3-chome, Shimbashi, Minato-ku, Tokyo No. 9 Toshiba Abu E Co., Ltd. (72) Inventor Kazuhiko Taira 3-3-9 Shimbashi, Minato-ku, Tokyo F-term in Toshiba Abu E Co., Ltd. 5D044 BC02 CC04 DE49 DE54 EF03 EF05 FG10 FG18 GK12 5D110 AA14 DA02 DA04 DA12 DA15 DB17 DC06 DC15 DC22 DE06 FA08

Claims (8)

[Claims] An information recording / reproducing apparatus having a work memory and recording / reproducing video information in a data format of an RTR-DVD format on a recordable recording medium, comprising: A recording directory detecting unit that searches for file management data and detects whether there is a directory for the RTR-DVD format, and constructs the recording directory in the management area according to information of the recording directory detecting unit. An information recording / reproducing apparatus, comprising: 2. A storage medium according to claim 1, wherein when there is no file management data in a management area of said recording medium, a VMG (video manager) in an initial state is formed and said VMG is constructed in said work memory unit.
2. The information recording / reproducing apparatus according to claim 1, further comprising an MG construction unit. 3. An information recording / reproducing apparatus having a work memory and recording / reproducing video information in a data format of RTR-DVD format on a recordable recording medium, comprising: A recording directory detecting unit that searches for file management data and detects whether or not the directory for the RTR-DVD format exists; and, if the information of the recording directory detecting unit determines that the directory exists, VMG
VMG to search for (video manager)
A detecting unit; a VMG constructing unit configured to construct a VMG in an initial state in the work memory when it is determined that there is no VMG in the directory to be recorded based on information from the VMG detecting unit; If it is determined from the information from that that there is a VMG in the directory to be recorded,
An information recording / reproducing apparatus, comprising: a VMG reading unit that reads MG into the work memory. 4. An audio / video data VRO (Video Recorder) in a RTR-DVD format data format on a recordable recording medium having a work memory.
an information recording / reproducing apparatus for recording / reproducing (ding object) a VRO file registration unit for registering information on video / audio data VRO recorded on the recording medium in a management area of the recording medium at the end of recording; An information recording / reproducing apparatus, comprising: a VMG recording unit that records VMG information in a memory unit in a management area of the recording medium. 5. An audio / video data VRO (Video Recorder) in a RTR-DVD format data format on a recordable recording medium having a work memory.
a recording address determining unit for determining a recording start address and a size of continuous recording based on file management data recorded in a management area of the recording medium at the time of recording; According to the information of the recording address determination unit, the audio
A packet section for packetizing the video data VRO; a format section for generating segmentation data for segmentation of the data based on the packetized data; and a recording section in the work memory based on segmentation information of the format section. VMG that updates VMG information
An information recording / reproducing apparatus, comprising: an updating unit. 6. The audio-video VRO recorded on the recording medium at the end of recording, if the audio-video VRO ends in the middle of an ECC block, a dummy pack is additionally recorded thereafter and ECC alignment is performed. The information recording / reproducing apparatus according to claim 5, further comprising an ECC align unit. 7. An information recording / reproducing apparatus having a work memory and recording / reproducing video information in a data format of RTR-DVD format on a recordable recording medium, comprising: A recording directory detecting unit that searches for file management data and detects whether or not the directory for the RTR-DVD format exists; and, if the information of the recording directory detecting unit determines that the directory exists, VMG
VMG to search for (video manager)
A detecting unit; a VMG constructing unit configured to construct a VMG in an initial state in the work memory when it is determined that there is no VMG in the directory to be recorded based on information from the VMG detecting unit; If it is determined from the information from that that there is a VMG in the directory to be recorded,
A VMG reading unit that reads an MG into the work memory; and a reproduction FP that calculates a reproduction start file pointer (FP) of a video file to be reproduced based on the VMG management information recorded in the management area of the recording medium during reproduction. A calculation unit, and an address generation unit that generates a physical address by comparing the information with the information from the reproduction FP calculation unit, and converts the file pointer into the physical address and performs reproduction based on the physical address. Characteristic information recording / reproducing device. 8. An information recording / reproducing apparatus having a work memory and recording / reproducing video information in a data format of RTR-DVD format on a recordable recording medium, comprising: A recording directory detecting unit that searches for file management data and detects whether or not the directory for the RTR-DVD format exists; and, if the information of the recording directory detecting unit determines that the directory exists, VMG
VMG to search for (video manager)
A detecting unit; a VMG constructing unit configured to construct a VMG in an initial state in the work memory when it is determined that there is no VMG in the directory to be recorded based on information from the VMG detecting unit; If it is determined from the information from that that there is a VMG in the directory to be recorded,
A VMG reading unit that reads an MG into the work memory; and a reproduction FP that calculates a reproduction start file pointer (FP) of a video file to be reproduced based on the VMG management information recorded in the management area of the recording medium during reproduction. A calculation unit, and an address conversion unit that compares information from the reproduction FP calculation unit with information of the file management data and converts a start logical address into a physical address. An information recording / reproducing apparatus, which performs conversion and performs reproduction based on the converted information.