JP2001266496A - Unit and method for recording and reproducing information - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide technology for recovering managing information data for enabling random access or special reproducing by recovering animation and audio data, which are recorded on a recording medium until stop, even when power supply is unexpectedly interrupted and recording is stopped, for example, during real time recording. SOLUTION: This unit is provided with a video/audio/managing information multiplexing means for generating data, which are required for generating the managing information data for the random access or special reproducing of the recording medium, and multiplexing the data required for generating the managing information data, encoded video data outputted from a video encoding means and encoded audio data outputted from an audio encoding means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a technique for recording information on a recording medium or a technique for reproducing information from the recording medium.

[0002]

2. Description of the Related Art Technologies relating to a recording medium for recording images and sounds in real time, a recording device, a reproducing device, and an editing device are disclosed in, for example, Japanese Patent Application Laid-Open No.
No. 187354.

[0003]

The above publication discloses a technique for recording video and audio data in real time and recording management information data for enabling random access and special reproduction on a recording medium in real time. Have been. However, when recording in real time, for example, when power supply is unexpectedly cut off and recording is stopped, video and audio data recorded on the recording medium and its management information data satisfy a predetermined format. Instead, it is recorded on a recording medium.

[0004] It is an object of the present invention to provide a method for recording video and audio recorded on a recording medium until recording is stopped in real time, even if the power supply is unexpectedly cut off and the recording is stopped. It is an object of the present invention to provide a technique for restoring data and restoring management information data for enabling random access and trick play.

[0005] For example, when the battery is suddenly removed during shooting outdoors with a camera, the power supply is cut off, and then the power is turned on again, video / audio data and random access and special reproduction can be performed. Of the management information data is executed, and a lot of time is spent,
There is a case where the power of the battery is consumed by the restoration process, so that the photographing cannot be performed when photographing is desired.

Further, it is an object of the present invention to provide a method for recording a video signal when the power supply is unexpectedly cut off during recording in real time, the recording is stopped, and then the power is turned on again.
Omission of repair processing of audio data and management information data to enable random access and special playback,
It is an object of the present invention to provide a device that avoids wasting time and power, immediately starts recording in real time, and improves the usability of a user.

[0007]

According to the present invention, there is provided an information recording / reproducing apparatus for multiplexing at least video encoded data and audio encoded data, and output from the recorded data multiplexing means. Recording data storage means for storing data, and management for generating data necessary for generating management information for reproducing data recorded on the recording medium based on data obtained from the recording data multiplexing means Information generating data generating means, management information storing means for storing the management information, and generating the management information based on an output from the management information generating data generating means, and writing or reading the information in the management information storing means Management information generation means, at least information output from the recording data storage means, or output from the management information generation means Recording medium drive processing means for recording or reading information on or from a recording medium, recording state storage means for storing state information indicating the state of recording processing, the recording data multiplexing means, the recording data storage means, and the management information The management data generating means, the management information generating means, the management information storage means, the recording medium drive processing means, and the integrated management means for managing the recording state storage means, the integrated management means, The status information is written to or read from the recording status storage means.

Alternatively, an information recording / reproducing apparatus according to the present invention is an information recording / reproducing apparatus for recording video or audio on a recording medium, comprising: video encoding means for encoding an analog video signal; Audio encoding means for generating data necessary for generating management information data for random access and special reproduction of a recording medium, and data and video encoding means required for generating management information data For multiplexing video encoded data output from the audio encoding data output from the audio encoding means
/ Audio / management information multiplexing means (which may include the recording data multiplexing means and the management information generation data generating means), and multiplexed data output from the video / audio / management information multiplexing means. And a stream buffer for writing the multiplexed data on a recording medium as a bit stream file (may be the recording data storage means), and a volatile management information expansion memory (the management Information management means), management information data is generated from data necessary for generating the management information data, written to a volatile management information memory, and the management information data is written to a recording medium as a management information file. Information generating means, and management information for reading a management information file from a recording medium and developing the management information file in a volatile management information development memory Expansion means, recording medium drive means (which may be a recording medium drive processing means) for directly reading and writing data from the recording medium, and a non-volatile recording state which is a non-volatile memory for storing the progress of the recording process Memory (may be a recording state storage unit)
The video encoding unit, the audio encoding unit, the video / audio / management information multiplexing unit, the stream buffer, the management information generation unit, the management information development unit, the volatile management information development memory, There is provided an integrated management means for managing the recording medium drive means in an integrated manner, and writing and reading the processing state to and from the nonvolatile recording state memory. With this configuration, when the power supply is unexpectedly cut off during the real-time recording, the state in which the power supply is cut off during the real-time recording is stored in the nonvolatile memory.

The video / audio / management information multiplexing means does not necessarily multiplex the data necessary for generating the management information data with the video coded data and the audio coded data. Is also good. However, it is assumed that the video / audio / management information multiplexing means generates at least data necessary for generating management information data and outputs the data to the management information generation means.

Further, the data used by the video / audio / management information multiplexing means to generate data necessary for generating management information data is limited to video encoded data and audio encoded data. However, after the bit stream file is recorded on the recording medium, the management information data necessary for enabling the recorded bit stream file to be able to perform a reproduction process such as random access or special reproduction is generated. Any data that can be used to do so is acceptable.

Further, the information recording / reproducing apparatus according to the present invention is the information recording / reproducing apparatus, wherein the recording medium drive processing means for recording or reading information on or from a recording medium;
Recording data separating means for separating video encoded data and audio encoded data from information read from the recording medium, and recorded on the recording medium based on data obtained from the recording data separating means; The management information generation data generation means for generating data necessary for generating management information for reproducing data, the management information storage means for storing the management information, and the management information generation data generation means The management information is generated from the information read from the recording medium, and the management information is generated by writing the management information to the management information storage means based on the output from the storage medium. Management information reading means for outputting, the recording data separating means, the management information generating data generating means, the management information generating means, An integrated management unit for managing the management information storage unit, the recording medium drive processing unit, the management information reading unit, and the recording state storage unit, wherein the recording medium drive processing unit is output from the management information generation unit. Information is recorded on the recording medium, and the integrated management means writes or reads the state information to or from the recording state storage means.

Alternatively, an information recording / reproducing apparatus according to the present invention reads out the bit stream file recorded on a recording medium, and stores video encoded data, audio encoded data, and data necessary for generating management information data. Video / audio / management information separation means to separate
(It may include the recording data separation means and the management information generation data generation means), a volatile management information development memory for storing management information data, and a memory for generating management information data. Management information generating means for generating management information data from data, writing the management information data to a volatile management information memory, and writing the management information data to a recording medium as a management information file, reading the management information file from the recording medium, and developing the volatile management information Management information expanding means for expanding in a memory (may be the management information reading means);
A recording medium drive means for reading or writing data directly from a recording medium, a non-volatile recording state memory which is a non-volatile memory for storing the progress of a recording process, and the video / audio / management information separating means; The management information generation unit, the management information expansion unit, the volatile management information expansion memory, and the recording medium drive unit are integratedly managed, and the state of the processing is written to or read from data in a nonvolatile recording state memory. And integrated management means. With this configuration, when the power supply is unexpectedly cut off during real-time recording, and when the power is turned on again, the state in which the power supply was cut off during real-time recording is obtained from the non-volatile memory, and To restore data written in the recording medium.

The video / audio / management information separating means reads the bit stream file recorded on a recording medium and separates data necessary for generating management information data. In addition, there is no need to separate data necessary for generating management information data. However, it is assumed that the video / audio / management information separating means generates at least data necessary for generating management information data and outputs the data to the management information generation processing.

The data used by the video / audio / management information separating means to generate data necessary for generating management information data is limited to video encoded data and audio encoded data. However, if the bit stream file recorded on the recording medium can be used to generate management information data required for enabling random access and reproduction processing such as special reproduction, any data can be used. Good.

[0015] In the information recording / reproducing apparatus, the recording state storage means may be storage means for storing stored information even when power supply is cut off.

In the information recording / reproducing apparatus, the information recorded on the recording medium is processed to be reproducible information based on the status information read from the recording status storage means.

Further, in the information recording / reproducing apparatus,
Based on the status information read from the recording status storage unit, information read from the recording medium is checked, and data from a recording unit including unreproducible information to the end of a file is deleted.

Further, in the information recording / reproducing apparatus, a management unit group consisting of information read from the recording medium is checked based on the status information read from the recording state storage means, and a recording unit including information that cannot be reproduced is included. A management unit including a unit is deleted, and a management unit including a recording unit including the unreproducible information from a beginning of the management unit group is defined as a first management unit group, and a recording unit including the unreproducible information is defined as a first management unit group. The range from the included management unit to the end of the management unit group is set as a second management unit group.

It should be noted that the present invention relates to the DVD Video Recording standard.
When applied to a case where a stream conforming to (hereinafter simply referred to as VR standard) is handled, the recording unit corresponds to a pack, the management unit corresponds to a VOBU (VOB Unit), and the management unit group includes: VOB (Video Object)
It may be equivalent to t).

Further, in the apparatus according to the present invention, in the information recording / reproducing apparatus, the information outputted from the recording data storage means is used as a data file in the recording medium, and the information outputted from the management information generating means is stored in the recording medium. A set of management information files is recorded as first and second plural sets, and a file can be written in a predetermined file format on the recording medium.
Or file system management processing means for managing files so that they can be read or a new file can be generated from two files, and reads the first set of management information files from the file system management processing means First management information file reading processing means; first management information storage means for storing the first set of management information read from the first management information file reading processing means as first management information; Management information file writing processing means for reading out the first management information from the first management information storage means and writing the first management information as a first set of management information files into a file system management processing means; and Second management information file reading processing means for reading the second set of management information files from the management processing means; and Second management information storage means for storing the second set of management information read from the information file read processing means as second management information; and information stored in the first management information information storage means. And, from the information stored in the second management information storage means, to generate new management information, and a combination processing means to write to the first management information storage means, the data file and A plurality of sets of the management information files are combined into one set.

Alternatively, in the information recording / reproducing device, the information recording / reproducing device may be configured to store the data file and the management information file recorded on the recording medium based on the status information read from the recording status storage unit. Examine the set of 1 and if the information that cannot be reproduced is included,
Is changed to a second identifier, and a new data file and a new management information file to be recorded on the recording medium are recorded as a first set on the recording medium.

Therefore, for example, a case will be described in which the present invention is applied to a case where a stream conforming to the VR standard is handled. If the file in the DVD_RTAV directory is in a state that cannot be played back normally because the power supply was unexpectedly cut off during recording and the recording was stopped, unless the file is restored to a state in which it can be played back normally, In some cases, recording cannot be started.

When the present invention described above is applied, the name (first set of identifiers) of a DVD_RTAV directory including a file that cannot be normally reproduced is changed to, for example, DV.
By changing to the D_RTAV_BAK directory (the second set of identifiers), when recording is restarted, new information to be recorded is newly recorded as a file based on the VR standard in the new DVD_RTAV directory. Becomes possible. Therefore, recording can be started without repairing a file that cannot be normally reproduced.

It should be noted that there may be two or more sets of the data file and the management information file recorded on the recording medium, and the two or more sets may be one set.

Alternatively, an apparatus according to the present invention includes a recording medium having an area for recording a plurality of sets of encoded image data files and a management information file for managing the image data files; Recording medium drive processing means for writing and reading information from the recording medium; file system management processing means for writing and reading files in a predetermined file format on the recording medium and combining the two files; The management information file read processing means for instructing the management information file to be read from the file system management processing means, and the management information file read from the management information file read processing means are stored as management information development data. Management information expansion memory and management information expansion memory It reads the management information development data, as the management information file, commands to write to the file system management processing unit, a management information file write processing means, from the file system management processing unit, albeit at the management information file in the same format,
A backup management information file read processing unit that instructs to read a backup management information file, which is a different file, and a backup management information file read from the backup management information file read processing unit are stored as backup management information expansion data. A backup management information expansion memory for storing
Combining the information of the management information development memory and the information of the backup management information development memory into one, and writing the management information development memory, comprising a combination processing means, a plurality of sets of image data files and management information files, It is configured to be combined into one set.

Further, the apparatus according to the present invention comprises a moving image compression encoding processing means for compressing and encoding an analog moving image,
Audio compression encoding processing means for compressing and encoding analog audio, video compression encoded data output from the video compression encoding processing means, and audio compression encoding data output from the audio compression encoding processing means. Multiplexing, video and audio multiplexing processing means, from the video and audio compression and multiplexing processing means, to obtain information necessary to generate a management information file, to the management information expansion data expanded in the management information expansion memory,
Management information expansion data generation processing means for additionally writing as management information expansion data, a stream buffer for temporarily storing a multiplexed stream output from the moving picture audio compression and multiplexing processing means, and multiplexed data from the stream buffer to the file system management means, A stream buffer management unit that instructs writing as a multiplexed stream file, a state management non-volatile memory that is a non-volatile memory that stores the progress of the recording process, a management information file, or an error in the multiplexed stream file Recovery processing means for recovering to a normal format, monitoring the state management non-volatile memory at the time of startup, and instructing to expand the management information file in the management information expansion memory according to the state; Repair management information files and multiplexed stream files Or to combine multiple sets of image data files and management information files into one set, such as when shooting outdoors with a recording device such as a camera that records in real time, When the power supply is unexpectedly cut off and the recording is stopped, when the power is turned on again, it is determined whether or not the video data and audio data recorded on the recording medium and the management information data are to be restored to a predetermined format. Configure to select.

Further, in order to achieve the above object, according to the present invention, a memory for storing a state is provided, and a finer state determining flag is stored. The stream data is sequentially analyzed from various data positions, and the management information file and the audio / video bit stream file (hereinafter also referred to as AV data file) themselves are repaired. If a defective portion is found halfway, an appropriate coding unit including the corresponding portion is truncated to restore the AV data file. Alternatively, even if there is a defective part in the middle of the stream data, the relevant part is not truncated and the management information is corrected so as to have no defect. It is configured to perform repair.

Further, in the information recording / reproducing method of the present invention, a recording data multiplexing step of multiplexing at least video coded data and audio coded data, and data output from the recording data multiplexing step are A recording data storage step for storing; a management information generation data generation step for generating data necessary for generating management information for reproducing data recorded on a recording medium; and the management information generation data generation step A management information generation step of generating the management information based on an output from the storage device; a management information storage step of storing the management information; a step of reading the management information stored in the management information storage step; The information stored in the data storage step or the information stored in the management information storage step A recording medium drive processing step of recording or reading the recorded information on a recording medium, a recording state storage step of storing state information indicating a state of the recording processing, and the state information stored in the recording state storage step. Reading step.

Further, in the information recording / reproducing method according to the present invention, in the information recording / reproducing method, the recording medium drive processing step of recording or reading information on or from the recording medium; A recording data separating step of separating encoded data and audio encoded data; and generating management information for reproducing data recorded on the recording medium based on the data obtained from the recording data separating step. The management information generating data generating step for generating data necessary for the management information generating step; the management information generating step for generating the management information based on an output from the management information generating data generating step; and storing the management information. Output to the management information storage step and the management information storage step from the management information generation step Or reading the management information stored in the management information storage step, reading the management information from the information read from the recording medium, and outputting the management information to the management information storage step, Recording the information output from the management information generating step on the recording medium; a recording state storing step for storing state information indicating a state of a recording process; and the state information stored in the recording state storing step And the step of reading

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.

In the following description, the information recording / reproducing apparatus of the present invention will be described not only as an information recording / reproducing apparatus but also as a recording apparatus or a recorded information restoring apparatus.

FIG. 1 is a block diagram of a recording apparatus according to a first embodiment of the present invention.

The recording apparatus of the first embodiment shown in FIG. 1 has an input terminal 10 for analog video data, an input terminal 20 for analog audio data, a video encoding process 30, an audio encoding process 40, a video / audio / management. Information multiplexing processing 50, stream buffer 60, management information generation processing 70, recording medium drive processing 80, volatile management information expansion memory 90, management information expansion processing 100, integrated management processing 110, nonvolatile recording state memory 120, recording medium 1
30.

As a method for compressing video and audio data, for example, the MPEG method (Motion Pi
culture Experts Group). M
The PEG system is a format compatible with random access and special reproduction, but is not a system that can easily realize them. Therefore, when video and audio data are compressed by using the MPEG method and recorded on a recording medium, random access and special reproduction are realized by not only information of a compressed bit stream but also other information. In addition, it is necessary to create management information data for random access and trick play, and record it on a recording medium. For example, FIG. 2 shows a file configuration of data recorded on a recording medium when video or audio data is compressed by the MPEG method and recorded on a recording medium.

For example, when recording video or audio data with a video camera, when the recording start button of the recording device is pressed by the user, recording on the recording medium is started, and the recording end button of the recording device is pressed by the user. And the recording on the recording medium is terminated. The period from the start to the end of recording is called a recording unit. By repeating the recording start and recording end operations, an MPEG-format bit stream (hereinafter simply referred to as a bit stream) is additionally recorded on the recording medium. At this time, the format of the multiplexing of the video and the audio is the format of the program stream of the MPEG system, and is recorded on the recording medium in that format.

As shown in FIG. 2, the files configured on the recording medium are a management information file 200, a bit stream file 210, and a management information backup file 220. In the management information file 200, management information on a bit stream is recorded for each recording unit. In the bit stream file 210, bit stream data for each recording unit is continuously recorded on one file. The management information backup file 220 is
This is a file in which exactly the same information as the management information file 200 is recorded and the management information file 200 cannot be read.

Hereinafter, GOP, PTS, pack, pack header, system header, packet header, I picture,
Words such as P pictures, B pictures, frames, fields, elementary streams and the like used in the MPEG standard are used without any particular notice.

The management information file will be described. The management information file 200 has a format considering random access and trick play, and FIG. 3 shows an example of the data configuration. The management information file 200 records information on a bit stream for each recording unit. FIG.
As shown in the figure, the management information file 200 is composed of recording unit information # 1, recording unit information # 2, recording unit information #i, recording unit information #M.

In FIG. 3, information including recording unit information # 1, recording unit information # 2, recording unit information #i, recording unit information #M is shown as all recording information 300.

Recording unit information # in all recording information 300
i is further subdivided, and an example of its configuration is shown in FIG. As shown in FIG. 4, the recording unit information #I includes recording unit general information 400, time information # 1, and unit time information # 2.
... Unit time information #i ... Unit time information #N, GOP information #
1, GOP information # 2 ... GOP information #i ... GOP information #O
It consists of.

In FIG. 4, information including time information # 1, time information # 2,... Time information #i, time information #N is shown as time information 410. Also, in FIG.
Information including information # 1, GOP information # 2 ... GOP information #i ... GOP information #O is shown as GOP information 420.

The recording unit comprehensive information 400 is further subdivided, and an example of its structure is shown in FIG.

As shown in FIG. 5, the recording unit comprehensive information 40
0 is the recording start time 500, the PTS 510 of the first image,
PTS 520 of the end image, start data address 530,
Recording unit data size 540, total unit time information 55
0, the total number of GOPs is 560. Recording start time 5
00 is the time at which the recording unit started recording. The PTS 510 of the first image is the PTS of the display first frame of the recording unit
TS. The PTS 520 of the last image is a value obtained by adding one frame display period to the PTS of the display last frame of the recording unit. The head data address 530 is the recording unit #
The address of the head data of the bit stream of i in the bit stream file 210. One address is 2
This corresponds to one pack composed of 048 bytes. That is, this one address corresponds to a data length of 2048 bytes. The recording unit data size 540 is the data size of the recording unit #i. Like the address, one data size corresponds to one pack composed of 2048 bytes. The total unit time information 550 is the number of unit time information included in the recording unit #i. The total number of GOPs 560 is the number of GOPs included in the recording unit #i.

The unit time information #i is further subdivided, and an example of its configuration is shown in FIG. As shown in FIG. 6, the unit time information #i includes 600 GOPs and head address data 610. The unit time is a fixed time length, and is used to reduce the amount of calculation for calculating an address on a bit stream file when random access is performed in the middle of a certain recording unit. For example, 1
A value of 0 seconds is appropriate. The GOP number 600 is the number of GOPs from the head of the recording unit #i of the head GOP of the unit time information #i. The start address data 610 is
This is a relative address from the head data of the recording unit #i on the bit stream file.

The GOP information #i is further subdivided, and an example of its configuration is shown in FIG. As shown in FIG. 7, the GOP information #i includes an I picture size 710, GO picture
A P playback time 720 and a GOP size 730 are provided. The I picture size 710 is, as shown in FIG.
This is the size from the head of the OP to the pack including the last data of the I picture data. Like the address, one data size corresponds to one pack composed of 2048 bytes. The GOP playback time 720 is a value indicating the playback time of the GOP in field units. GOP size 730
Is the data size of the GOP, as shown in FIG.
Like the address, one data size corresponds to one pack composed of 2048 bytes.

The bit stream file 210 will be described. In the bit stream file 210, bit stream data for each recording unit is continuously recorded on one file. FIG. 8 shows an example of the configuration of a certain recording unit on the bit stream file 210. As shown in FIG. 8, a certain recording unit is composed of several GOPs. The GOP has a management information pack 8 in the first pack.
00 is arranged, information necessary for creating the management information file 200 is recorded, and an I picture or audio data is recorded from the next pack. After that, a P picture, a B picture, and audio data are recorded.

FIG. 9 shows an example of the configuration of the management information pack 800. Pack header 900, system header 91
0, packet header 920, management information identifier 930, G
OP recording start time 940, GOP number 950, GOP
The first image PTS960, the GOP last image PTS970,
It comprises a GOP size 980 and an I picture size 990. Pack header 900, system header 910,
The packet header 920 conforms to the MPEG program stream, and the packet header 920 records information indicating that the packet is neither a video pack nor an audio pack, and is a private pack for which user definition is permitted.

The recording unit management information identifier 930 is a unique identifier indicating that the recording has been performed by the recording apparatus of the present invention, and is, for example, 32 bits long and "18273645H" is appropriate.

The GOP recording start time 940 is the time at which GOP recording starts. The GOP number 950 is a value indicating the order of the GOP from the beginning of the recording unit of the immediately preceding GOP recorded in the management information pack 800. The GOP head image PTS 960 is the PTS of the head display frame of the immediately preceding GOP recorded in the management information pack 800. GOP end image PTS970
Is the previous G recorded in the management information pack 800
This is a PTS obtained by adding one frame period to the PTS of the display frame at the end of the OP. The GOP size 980 is the data size of the immediately preceding GOP recorded in the management information pack 800. The I picture size 990 is the I picture size of the immediately preceding GOP in which the management information pack is recorded. As described above, information on the immediately preceding GOP recorded in the management information pack 800 is recorded. Head management information pack 8 of the head GOP of a certain recording unit
00 GOP recording start time 940 and GOP number 9
50 records valid data, and the value of the GOP number is "
0 ". The values of the GOP start image PTS 960, the GOP end image PTS 970, the GOP size 980, and the I picture size 990 are not particularly defined and are treated as invalid data.

The recording device shown in FIG. 1 is a device for recording the management information file 200, stream data file 210, and management information backup file 220 on a recording medium.

Hereinafter, the recording apparatus of FIG. 1 will be described in detail.

The analog video data is input from the analog video data input terminal 10 and transferred to the video encoding processing 30. The video encoding processing 30 encodes analog video data according to a predetermined encoding format.
In this embodiment, the MPEG system is adopted as an example. M
The video data compressed and encoded by the PEG method is transferred to a video / audio / management information multiplexing process 50 as a video elementary stream. Analog audio data is input from the analog audio data input terminal 20 and transferred to the audio encoding processing 40.

The audio encoding repair 40 encodes analog audio data according to a predetermined encoding format.
In the present embodiment, the MPEG system is adopted as in the case of the video data. The audio data compressed and encoded by the MPEG system is transferred to the video / audio / management information multiplexing process 50 as an audio elementary stream. The video elementary stream and the audio elementary stream input to the video / audio / management information multiplexing processing 50 are converted to a video packetized elementary stream (video PES) packetized with 2048 bytes to generate an MPEG program stream. And an audio packetized elementary stream (audio PES).

Further, a management information pack 800 having the data configuration shown in FIG. 9 is generated. Video PES, audio PE
S, the management information pack 800 stores the stream buffer 60
Then, they are arranged according to the arrangement of the packs shown in FIG. In the data structure shown in FIG. 9, the GOP recording start time 940, the GOP number 950, the GOP top image P
The TS 960, the GOP end image PTS 970, the GOP size 980, and the I picture size 990 are transferred to the management information generation processing 70 every time a GOP is generated.

When a certain amount of the bit stream stored in the stream buffer 60 is accumulated, the recording medium drive processing 8
0 is written to the recording medium 130 through the medium. This bit stream is written to the recording medium 130 as the bit stream file 210 shown in FIG.

The management information expanding process 100 is performed in the recording medium 13
The management information file 20 shown in FIG.
0 is read out via the recording medium drive processing 80 and expanded in the volatile management information expansion memory 90. The volatile management information development memory 90 is a memory whose storage is initialized when the power is turned off. The processing of the management information data may be directly from the recording medium 130, but the processing speed in the volatile management information development memory 90 is faster.

When the power of the recording apparatus of this embodiment is turned on, first, the management information file 200 of the recording medium 130 is developed in the volatile management information development memory 90.
The management information generation processing 70 is based on the data transferred from the video / audio / management information multiplexing processing 50 and the data developed in the volatile management information development memory 90 from the start to the end of the recording, as shown in FIGS. , FIG. 5, FIG. 6, and FIG. 7 are updated, and the information in the volatile management information development memory 90 is rewritten. When the recording is completed, the data in the volatile management information development memory 90 is stored in the management information file 20.
As 0, it is overwritten on the recording medium 130 via the recording medium drive processing 80. Further, the management information backup file 220 is overwritten with a copy of the management information file.

The integrated management process 110 includes a video encoding process 30, an audio encoding process 40, a video / audio /
The state of the management information multiplexing process 50, the stream buffer 60, the management information generation process 70, the recording medium drive process 80, the volatile management information development memory 90, and the management information development process 100 are integratedly managed. The processing system of this embodiment is classified into the states shown in FIG. 10, and codes are assigned to the respective states. The state from the time when the management file of the recording medium 130 is expanded in the volatile management information expansion memory 90 to the time when recording is started is assigned as a management information expansion state 1000, and the code “1” is assigned. Thereafter, a code “2” is assigned to a state in which recording has not been started and a state from the start of recording to the end of recording until data in the volatile management information development memory 90 is completely updated, as a stream recording state 1010. Thereafter, the state from the time when the data in the volatile management information development memory 90 is completely updated to the time when the management file on the recording medium 130 is completely overwritten is referred to as a management information development memory update state 1020, and the code “3” is set. assign. afterwards,
The state from the time when the management file of the recording medium 130 is completely overwritten until it is copied to the management information backup file is referred to as a recording medium management information update state 1030.
Is assigned the code "4". After that, the state in which the file is completely copied to the management information backup file 220 is assigned the code “1” as the normal end state 1040. That is, it is in the management information deployment state 1000. When the state transitions, the integrated management processing 110 records the code in the nonvolatile recording state memory 120. The nonvolatile recording state memory 120 is a memory whose storage is not initialized even when the power is turned off.

The code is read from the non-volatile state memory 120, the state is checked, and processing is performed in accordance therewith, so that even if the power supply is unexpectedly cut off and the recording is stopped, it is possible to keep the recording until the recording is stopped. Data can be repaired. The repair method is shown in a second embodiment.

Hereinafter, a second embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 11 is a block diagram of a recorded information restoring device according to a second embodiment of the present invention.

The recording information restoring apparatus shown in FIG. 11 includes a management information generation process 70, a recording medium drive process 80, a volatile management information expansion memory 90, a management information expansion process 100, an integrated management process 110, and a nonvolatile recording state memory 120. , Recording medium 130, video / audio / management information separation processing 1
40.

In the first embodiment, the cases are classified as shown in FIG. 12 according to the codes stored in the nonvolatile recording state memory 120, and the process of restoring the information of the recording medium 130 is performed.

At step 1210, when the code is "1", the state is normal, and the state 128 is a state of waiting for normal recording processing.
It becomes 0.

In 1220 or 1230, the code is “2”
Alternatively, when the value is “3”, the recording has not been completed normally, and the process of restoring the information of the recording medium 130 is performed. The restoration process at this time will be described.

The management information file 2 corresponding to the recording unit before the recording unit where the recording was interrupted is stored in the recording medium 130.
00. The bit stream file 210 records the bit stream up to the time when the recording was interrupted. The recording medium drive processing 80
The management information file is read out and transferred to the management information development processing 100 via the process.

The management information expanding process 100 expands the management information file 200 in the volatile management information memory 90. The bit stream file 210 is read from the recording medium 130 via the recording medium drive processing 80 and transferred to the video / audio / management information separation processing 140. At this time, reading all the bit stream files is not preferable because it takes too much time. In order to shorten the reading time, only necessary packs are read. The header is searched from the end of the bit stream file, and the management information pack 800 is searched. The management information of the found management information pack 800 is stored in a management information generation process 7
Transfer to 0.

Next, the GOP of the management information pack shown in FIG.
From the value of the size 980, the bit stream file 21
On 0, the program jumps to the management information pack 800 immediately before this management information pack 800, and transfers the information to the management information generation processing 70. Thereafter, the management information pack 80 shown in FIG.
Repeat until the GOP number 950 of 0 becomes “0”.
The management information generation processing 70 is performed in the volatile management information development memory 9.
The data of 0 is updated.

Next, the data in the volatile management information memory 90 is written to the recording medium 130, and a copy thereof is written to the management information backup file 220.

Next, the integrated management processing 110 proceeds to 1270
Then, the code "1" is written in the nonvolatile recording state memory,
A state 1280 for waiting for normal recording processing is entered.

When the code is "4" in 1240, the management information file 200 has been normally written in the recording medium 130, but a copy thereof has not been written in the management information backup file. Therefore, at 1260, a copy of the management information file 200 of the recording medium 130 is written to the management information backup file 220. Next, the integrated management processing 110 stores a code “
State 1280 for writing 1 "and waiting for normal recording processing
become.

In the reference numerals 1210 to 1240, the codes are "1" and "1".
If it does not correspond to any of 2 "," 3 ", and" 4 ", the code is set to" 1 "in 1250 because the nonvolatile state recording memory 120 has not been initialized.
When using this device for the first time, of course,
Must be set to 1 ".

Hereinafter, a third embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 13 is a block diagram of an editing apparatus according to a third embodiment of the present invention.

The editing apparatus according to the third embodiment shown in FIG.
Recording medium 2010, recording medium drive processing unit 2020, file system management processing unit 2030, management information file read processing unit 2040, management information file write processing unit 2050, management information expansion memory 2060, combination processing unit 2070, backup management information read processing Part 208
0, a backup management information expansion memory 2090.

For example, the DVD Video Recording standard (hereinafter, referred to as the DVD Video Recording standard)
A case in which a stream conforming to the VR standard is simply described.

As shown in FIG. 14, according to the VR standard, there is a DVD_RTAV directory 2200 on a recording medium, and the VR_MANGR.IFO file 2210 and VR_MOVIE.VRO
File 2220, VR_STILL.VRO file 2230, VR
_AUDIO.VRO file 2240, VR_MANGR.BUP file 2
There are 250. The VR_MOVIE.VRO file 2220 adds a video stream data file, the VR_STILL.VRO file 2230 adds a still image stream data or a still image stream data file with audio, and the VR_AUDIO.VRO file 2240 adds an audio stream to the VR_STILL.VRO file 2230. Audio stream data file. VR_MANGR.IFO file 2210
The VR_MOVIE.VRO file 2220, the VR_STILL.VRO file 2230, and the VR_AUDIO.VRO file 2240 have a time code and file position association table necessary for performing special reproduction such as random access and fast forward rewind, and a user interface. And text information and time information to be displayed to the user through the. The VR_MANGR.BUP file 2250 is exactly the same as the data in the VR_MANGR.IFO file 2210.

The recording medium 2010 of this embodiment has a DVD_RT
In addition to the AV directory 2200, a DVD_RTAV_BAK directory 2300 exists as shown in FIG. DV
In the lower layer of the D_RTAV_BAK directory 2300, DVD_
Similarly to the RTAV directory 2200, the VR_MANGR.IFO file 2310, the VR_MOVIE.VRO file 2320, the VR_STI
LL.VRO file 2330, VR_AUDIO.VRO file 234
0, a VR_MANGR.BUP file 2350 exists. DVD_RT
The files in the lower hierarchy of the AV_BAK directory 2300 conform to the VR standard.

The VR_MANGR.IFO file 2210 of the DVD_RTAV directory 2200 recorded on the recording medium 2010
Is read by the recording medium drive processing unit 2020,
The file system management processing unit 2030 recognizes the file as a file.

Management information file read processing unit 2040
DVD_RT from the file system management processing unit 2030
VR_MANGR.IFO in the lower hierarchy of the AV directory 2200
The file 2210 is read, the data described in the file is interpreted, and written as management information expansion data in the management information expansion memory 2060.

DVD_RTAV_B recorded on recording medium 2010
VR_MANGR.IFO under the AK directory 2300
The file 2310 is read by the recording medium drive processing unit 2020, and the file system management processing unit 2030
Is recognized as a file.

The backup management information file read processing unit 2080 is provided with a file system management processing unit 2030.
Then, the VR_MANGR.IFO file 2310 in the lower hierarchy of the DVD_RTAV_BAK directory 2300 is read, the data described in the file is interpreted, and the data is written to the backup management information development memory 2090 as backup management information development data.

The combining processing unit 2070 combines the management information expanded data stored in the management information expanded memory 2060 and the backup management information expanded data stored in the backup management information expanded memory 2090 to combine them. New management information development data is generated and written to the management information development memory 2060.

The VR_MOVIE.VRO file 2220, the VR_STILL.VRO file 2230, the VR_AUDIO.VRO file 2240, and the DV in the lower hierarchy of the DVD_RTAV directory 2200
VR_MOVI in the lower hierarchy of the D_RTAV_BAK directory 2300
E.VRO file 2320, VR_STILL.VRO file 233
0, the VR_AUDIO.VRO file 2340 is combined with a single file by changing only the file system information while keeping the physical arrangement of the data on the recording medium. As a result of combining the files, DV
VR_MOVI in the lower hierarchy of the D_RTAV_BAK directory 2300
E.VRO file 2320, VR_STILL.VRO file 233
0, VR_AUDIO.VRO file 2340 files, VR_MANG
R.IFO file 2310, VR_MANGR.BUP file 235
0 instructs the file system management processing unit 2030 to delete the entire DVD_RTAV_BAK directory 2300 and deletes it. Alternatively, the file system management processing unit 203
0, the files in the DVD_RTAV_BAK directory 2300 may be set as invalid.

Management information file write processing unit 2050
Reads the management information expansion data in the management information expansion memory 2060, and reads out the file system management processing unit 2030.
In the lower hierarchy of the DVD_RTAV directory 2200, VR_M
It instructs to write as an ANGR.IFO file 2210 and writes. Similarly, the VR_MANGR.BUP file 2250
Also write.

The file system management processing unit 2030 that has received the command to combine the files, delete the files, and write the files drives the recording medium drive processing unit 2020 to write the file information to the recording medium 2010.

As a result, the DVD_RTAV directory 220
0 and a DVD standard file recorded in the lower layer of DVD_RT.
VR recorded in the lower hierarchy of the AV_BAK directory 2300
Standards files can be combined and combined into one.

The DVD_RTAV_BAK directory 2300
Are not limited to the names in the present embodiment. Regardless of the name or the directory, it can be realized in this embodiment.

Hereinafter, a fourth embodiment of the present invention will be described in detail with reference to the drawings. The fourth embodiment is obtained by further adding processing to the third embodiment.

FIG. 16 is a block diagram of a recording apparatus according to a fourth embodiment of the present invention.

The recording apparatus according to the fourth embodiment shown in FIG.
Recording medium 2010, recording medium drive processing unit 2020, file system management processing unit 2030, management information file read processing unit 2040, management information file write processing unit 2050, management information expansion memory 2060, combination processing unit 2070, backup management information read processing Part 208
0, backup management information expansion memory 2090, video compression encoding processing section 2100, audio compression encoding processing section 21
10, video / audio multiplex processing unit 2120, management information expanded data generation processing unit 2130, stream buffer 214
0, a stream buffer management processing unit 2150, a startup processing unit 2160, a state management nonvolatile memory 2170, and a restoration processing unit 2180.

For example, the DVD Video Recording standard (hereinafter, referred to as the DVD Video Recording standard)
A case in which a stream conforming to the VR standard is simply described.

As shown in FIG. 14, according to the VR standard, there is a DVD_RTAV directory 2200 on a recording medium, and the VR_MANGR.IFO file 2210 and VR_MOVIE.VRO
File 2220, VR_STILL.VRO file 2230, VR
_AUDIO.VRO file 2240, VR_MANGR.BUP file 2
There are 250. The VR_MOVIE.VRO file 2220 is a moving image stream data file, the VR_STILL.VRO file 2230 is a still image stream data or a still image stream data file with audio, and the VR_AUDIO.VRO 224
The file 0 is an audio stream data file for adding an audio stream to the VR_STILL.VRO file 2230. VR_MANGR.IFO file 221
0 indicates an association table between the VR_MOVIE.VRO file 2220, the VR_STILL.VRO file 2230, and the VR_AUDIO.VRO file 2240, which is a time code and file position association table necessary for performing special playback such as random access and fast-forward rewind. Text information, time information, and the like to be displayed to the user through the interface are recorded. VR_MANGR.BUP file 2250 is VR_MANGR.IFO
It is exactly the same as the data in the file 2210.

First, the recording process will be described.

The moving image compression encoding unit 2100 compresses and encodes an analog moving image signal, and transfers the moving image stream data to the moving image audio multiplex processing unit 2120.

The audio compression / encoding processing unit 2110 compresses and encodes an analog audio signal, and
The audio stream data is transferred to 120.

The moving picture / audio multiplexing processing section 2120 multiplexes the coded moving picture stream data and the coded sound stream data, and transfers the multiplexed stream data to the stream buffer 2140 as multiplexed stream data. While transferring the multiplexed stream to the stream buffer 2140, information necessary to generate the VR_MANGR.IFO 2210 conforming to the VR standard is stored in the management information expanded data generation processing unit 21.
30 to generate a multiplexed stream and management information expanded data at the same time.

Stream buffer management processing unit 2150
Monitors the amount of data stored in the stream buffer 2140, and when a predetermined amount has been stored, the stream buffer 2140
Multiplexed stream data is extracted from the
An instruction is issued to the file system management processing unit 2030 so that the file system management processing unit 2030 is written as a file. The VR_MOVIE.VRO file 2220, VR_STILL.VRO file 2230, and VR_AUDIO.VRO file 2240 are selected according to the type of recording, and the multiplexed stream data is written.

Management information development data generation processing unit 2130
Generates management information expansion data in the management information expansion memory 2060 based on the information transferred from the video / audio multiplex processing unit 2120 during recording.

When the recording is completed, the management information file writing processing unit 2050 reads the management information development data from the management information development memory 2060 and sends it to the file system management processing unit 2030 in the lower hierarchy of the DVD_RTAV directory 2200 in the VR_MANGR.IFO. It instructs to write as file 2210 and writes. Also, VR_MANGR.BUP
The file 2250 is also written.

The state management nonvolatile memory 2170 defines states as shown in FIG. For example, the state in which the recording has been completed normally is denoted by code “0”, and the “normally completed state” 2
500 and the stream buffer management processing unit 215
0 is defined as a “stream write state” 2510 with a code “1” from the start of writing data in the stream buffer 2140 as a file to the end of recording, and the recording is completed and the VR_MANGR.IFO file 2210 is written. The state in which data is written is “2” and “IFO write state” 2
520, and the state in which the VR_MANGR.BUP file 2250 is written is denoted by code “3”, and the “BUP write state” 25
Defined as 30.

The stream buffer management processing unit 2150 executes the “stream write state” 2510 at a predetermined timing.
The management information write processing unit 2050 sends the “normal end state” 2500 and the “IFO write state” 2 at predetermined timing.
520, “BUP write state” 2530 is written to the state management nonvolatile memory 2170. File system management processing unit 2030 that has received a file write command
Drives the recording medium drive processing unit 2020 to write file information to the recording medium 2010.

Here, if the power supply of the recording apparatus of the present invention is unexpectedly shut down, the state in which the processing was being performed at the time of the shut down is written in the state management nonvolatile memory 2170. For example, if the power is shut off unexpectedly while in the “stream write state”, the state is written in the state management nonvolatile memory 2170 as “1” defined as “stream write state” 2510.

Therefore, when the power is turned on again, by referring to the information written in the state management non-volatile memory 2170, the state of the processing executed by the recording apparatus when the power is accidentally shut down can be changed. Understand. That is, if the information written in the state management nonvolatile memory 2170 is “1”, it can be understood that the power supply was unexpectedly shut off when the recording apparatus was in the “stream write state” 2510.

The startup processing unit 2160 monitors data in the state management nonvolatile memory 2170 at the time of startup, and operates according to the state as shown in the flowchart of FIG.

When the power of the recording apparatus is turned on, the activation processing section 21
60 starts the processing from 2600. In 2601, the state of the state management nonvolatile memory 2170 is changed to “normal end state”.
Is determined, and if "normal end state", 2602
If not, the DVD_RTAV directory 2200 is moved to the DVD_RTAV_BAK directory 230 in step 2603.
0, the state of the state management nonvolatile memory 2170 is recorded as state management data in an appropriate place of the recording medium 2010, and the state of the state management nonvolatile memory 2170 is set to a “normal end state” 2500. Transition is made to 2604.

In the above description, the state management nonvolatile memory 217
A process of recording the state of 0 as state management data in an appropriate place of the recording medium 2010 is performed. However,
When the recording apparatus performs processing, if the processing of recording the state of the state management nonvolatile memory 2170 in advance to the appropriate location of the recording medium 2010 as state management data is performed, when the power is turned on again, In an appropriate place of the recording medium 2010, the state management data is already recorded. Therefore, in this case, when the power is turned on again, it is not necessary to perform a process of recording the state of the state management nonvolatile memory 2170 in a suitable place of the recording medium 2010 as state management data.

In 2602, the DVD_
Check if there is an RTAV_BAK directory 2300,
If not, transition is made to 2611; if there is, transition is made to 2604. In other words, the transition to 2604 is a case where the DVD_RTAV directory 2200 has been changed to DVD_RTAV_BAK 2300 without normally finishing recording on the recording medium 2010. DVD_RT that did not end normally in 2604
The data in the lower hierarchy of the AV_BAK directory 2300 is restored to a normally ended state, and the user is asked whether to combine the data with the data in the existing DVD_RTAV directory 2200. If the restoration is selected, the process proceeds to 2605, If not selected, transition is made to 2611. 2
At 605, it is determined whether the state of the state management data in which the state of the state management nonvolatile memory 2170 is previously recorded as the state management data at an appropriate location on the recording medium 2010 is "stream write state" 2510, and "stream write state" is determined. If the status is "2510", DVD_RTA
VR_MOVIE. In the lower hierarchy of the V_BAK directory 2300.
VRO file 2320 or VR_STILL.VRO file 233
0 or finds a file in the VR_AUDIO.VRO file 2340 where the end of the file is interrupted, deletes unnecessary parts, shapes the end, and transitions to 2608. If 2605 "
If the stream writing state is not "2510", 260
Transition to 6. 2606 indicates that the status of the status management data is "I".
Judge whether the FO writing state is “2520”, and
If the write state is “2520”, the process transits to 2608. If the “IFO write state” is not 2520, 2
609, the VR_MANGR.BUP file 2350 in the lower hierarchy of the DVD_RTAV_BAK directory 2300 is copied to the VR_MAN.
Copy to GR.IFO file 2310 and transit to 2610. Reference numeral 2608 indicates whether the VR_MOVIE.VRO file 2310, the VR_STILL.VRO file 2320, or the VR_MOVIE.VRO file 2310 stores information necessary for a portion where information is not recorded in the VR_MANGR.IFO file 2310.
Extracted from VR_AUDIO.VRO file 2330, VR_MANG
An R.IFO file 2310 is generated. Reference numeral 2610 denotes a DVD_RTAV directory 2200 as shown in the first embodiment.
Merge the DVD_RTAV_BAK directory 2300 into one,
A new DVD_RTAV directory 2200 is created, and 261
1 to 261, DVD_RTAV directory 220
An instruction is issued to the management information read process 2040 so as to read the VR_MANGR.IFO 2210 in the lower hierarchy of
At 612, the activation process ends.

As a result, when the power supply is unexpectedly interrupted during recording, the recording is stopped, and when the power is turned on thereafter, the recording process can be started without necessarily executing the restoration process. Become.

In the VR standard, as shown in FIG. 14, a DVD_RTAV directory 2200 is provided on a recording medium, and a VR_MANGR.IFO file 2210 and a VR_MOVIE.VRO
File 2220, VR_STILL.VRO file 2230, VR
_AUDIO.VRO file 2240, VR_MANGR.BUP file 2
There are 250. The VR standard does not allow a plurality of these files to exist in the DVD_RTAV directory 2200 on the recording medium. Therefore, the power supply was unexpectedly cut off during recording and the recording was stopped,
If these files in the DVD_RTAV directory 2200 are in a state in which they cannot be normally reproduced, recording may not be started unless the file is restored to a state in which the files can be reproduced normally.

In the embodiment described above, by changing the name of the DVD_RTAV directory including the file that cannot be normally reproduced to the DVD_RTAV_BAK directory, when the recording is started again, the information to be newly recorded is the new DVD_RTAV. V in the directory
It becomes possible to newly record as a file based on the R standard. Therefore, recording can be started without repairing a file that cannot be normally reproduced.

In the above-described embodiment, a file which cannot be normally reproduced in the renamed DVD_RTAV_BAK directory is subjected to a restoration process at the request of the user, based on the VR standard in the DVD_RTAV directory. Can be combined into a file.

As described above, in the embodiment described above,
When the power supply is unexpectedly interrupted during recording, the recording is stopped, and then when the power is turned on, you can select whether or not to perform the repair. You can start recording. Restoration can take time, so when shooting outdoors with a recording device such as a camera, the power supply is unexpectedly cut off, recording is stopped, and restoration is performed when the power is turned on again. Then, the next recording cannot be immediately performed on the same recording medium. However, according to the present embodiment, recording can be immediately started again even with the same recording medium.

Therefore, in the embodiment described above, when the power supply is unexpectedly cut off during recording and the recording is stopped,
When the power is subsequently turned on, the recording can be started immediately without performing the restoration process, and the power required for the restoration process does not have to be supplied. Electricity can also be achieved.

For example, when the power supply is unexpectedly interrupted during recording by the camera while receiving power supply from the battery outdoors, the recording is stopped, and when the power is turned on thereafter, the restoration processing is performed. The power can be used for the recording process without consuming the power from the battery. For a file that cannot be normally reproduced, the restoration process may be performed at the request of the user, for example, by receiving power supply from the indoor wiring, without receiving power supply from the battery.

In addition, for example, even in a stationary information recording / reproducing apparatus which operates by being supplied with power from the indoor wiring, when the power supply is unexpectedly cut off during recording and the recording is stopped, When the power is turned on, the recording process can be started immediately without performing the restoration process. Therefore, the above-described embodiment can be implemented in a stationary information recording / reproducing apparatus. Yes and useful.

In the first and second embodiments described above, when an unexpected power supply interruption occurs during the recording operation, the data is written to the nonvolatile memory in the return operation when the power supply is performed again. The technique has been described in which a state flag is read, and based on this, information necessary for restoration included in the stream data is extracted in advance to restore the file. Accordingly, a method for restoring the management information file and the AV data file from the stream data without adding information in advance in the return operation after the power supply is cut off during the recording operation will be described. Next, a description will be given of a method of restoring the management information file and the AV data file so that even if the stream data is partially damaged, no trouble occurs in the subsequent recording / reproducing operation.

FIG. 20 is a diagram for explaining the directory structure of the file generated on the disk by the above-described recording operation in more detail. A subdirectory 3201 for real-time recording is arranged under the root directory 3200, and all the generated management information files and AV data files are placed under the subdirectory 3201. The management information file 3202 describes management information of the recorded AV data, and includes address information and attribute information of the AV data, as well as encoding parameter information and play list information at the time of editing. The moving image file 3203 is a file in which stream data obtained by encoding and multiplexing moving image data or audio data recorded together with the moving image data is recorded as AV data, and when moving image data is newly recorded. Is not generated, but is added to this file sequentially. The still image file 3204 is a file in which still image data or stream data obtained by encoding and multiplexing audio data recorded together with still image data is recorded as AV data, and is a new file as in the case of moving image data. When still image data is recorded in the file, the still image data is sequentially added to this file. The management information backup file 3205 has the same contents as the management information file 3202, and is used for backup when the management information file 3202 is damaged.

The reproduction of AV data from the disc is performed on the basis of information obtained from the management information file 3202, such as a read position or an attribute of image data. That is, the content of the management information file 3202 is the moving image file 3203 or the still image file 3203.
204 must correspond exactly. However, as described above, if the recording is stopped due to an accidental power-off during the real-time recording operation, for example, the moving image file 3203 or the still image file 3204, or the management information file 3202 does not satisfy the predetermined format depending on the timing and the disc is not recorded. There is a possibility that they will be recorded on top of each other and discrepancies will occur in their contents. A method of repairing a mismatch between data in the management information file and the AV data file in such a state without adding special information to the AV data file itself will be described below with reference to the drawings.

FIG. 19 is a block diagram showing a fifth embodiment of the information recording / reproducing apparatus according to the present invention, where 3001 is an input section, 3002 is an encoding / decoding section (hereinafter referred to as a Codec section), and 3003 is a user. I / F, 3004, a control unit, 3005, a program memory, 3006, a management information development memory, 3007, a track buffer, 300
8 is a drive, 3009 is an optical disk, 3010 is an output unit, and 3011 is a state storage memory.

First, the operation at the time of recording will be described. Image data and audio data input at the input unit 3001 are encoded by a codec unit 3002 according to a predetermined encoding method, and the information amount is compressed and multiplexed sequentially. The multiplexed stream data is temporarily stored in the track buffer 3007 to absorb the difference between the encoding rate and the transfer rate of the drive 3008, and is sequentially recorded on the optical disk 3009 by the drive 3008.
As described above, the recording here is additionally performed as a moving image file 3203 for moving image data and as a still image file 3204 for still image data. The control unit 3004 performs the control operation of each unit based on the instruction input of the operator via the user I / F 3003, and the necessary contents are appropriately loaded by reading and writing the program memory 3005 for the control contents. Is done. The Codec unit 3002 is shown collectively,
In some cases, a complex configuration is used, in which a part of the encoding is performed by hardware, and the other steps up to multiplexing are performed by software controlled by the control unit 3004.

Since it is difficult to record the management information file generated at the time of recording on the optical disk 3009 together with the AV data file in real time, the management information file is once expanded and updated in the management information expansion memory 3006, and A
After the recording of the V data file is completed, it is overwritten and recorded on the optical disk 3009 as the management information file 3202 described above. When the AV data is recorded on the optical disc 3009 for the first time, the management information is newly generated and developed in the management information development memory 3006. However, when the AV data is recorded on the optical disc on which the AV data has been recorded in the past, the management information is After being read from the optical disk 3009, the data is expanded in the management information expanding memory 3006. Following the recording of the management information file 3202, the same contents are stored as the management information backup file 3205 on the optical disk 3009.
Is overwritten and recorded.

The state storage memory 3011 is a non-volatile memory, and information (referred to as a state flag) corresponding to each recording state is stored by the control unit 3004.

The operation at the time of reproduction will also be described. In FIG. 19, the moving image file 3203 or the still image file 320
4 is read from an arbitrary data position and is temporarily stored in the track buffer 3007 as stream data.
The difference between the transfer rate of the drive and the encoding rate of the video and audio data is absorbed, the stream data is read from the track buffer 3007, the video data and the audio data are separated and decoded by the Codec unit 3002, and the appropriate data is output by the output unit 3010. Output in signal format.

As in the case of recording, the control unit 3004 controls each of the above-described units by loading the contents of the program memory 3005. However, as a reproducing operation, before reading the stream data, the optical disk 3
From 009, the management information file 3202 is
8 and the contents are expanded in the management information expanding memory 3006. The operator's instruction input input via the user I / F 3003 is interpreted by the control unit 3004, and the above-described reproduction operation is performed according to the management information expanded in the management information expansion memory 3006.

Here, the status flags stored in the status storage memory 3011 will be described in more detail.

FIG. 21 shows an example of the contents of the status flag recorded in the status storage memory 3011. In the above-described recording operation, the moving image file 3
The flag '1' is assigned to the state from the start of recording of the 203 to the end of writing on the optical disk 3009. Similarly, after the recording of the moving image file 3203, the flag '2' is set in a state from the start to the end of the recording of the management information file 3202, and the flag '3' is set in a state from the start to the end of the recording of the still image file 3204. After the recording of the still image file 3204, the management information file 320
Flag '4' in the state from the start to the end of recording 2
To the state from the start to the end of editing, such as deleting a part of the moving image file 3203 or the still image file 3204, and the operation of AV data such as rewriting a part of the management information file 3202. A flag “6” is assigned to the state from the start to the end of the edit, a flag “7” is assigned to the state from the start of the recording of the management information backup file 3205 to the end, and a state where the flag is included including during reproduction. Flags “0” are assigned to all the remaining states.

The operation at the time of restoration will be described below in consideration of these state flags. When the power supply to the device is inadvertently shut down, the status flag should indicate any one of the values from '0' to '7', and this value is stored in the status storage memory 3011. Since the state storage memory 3011 is a nonvolatile memory, its contents will not be lost even if the power supply is stopped.
When the power is turned on again after the power is turned off, the control unit 3004
Checks the status flag stored in the status storage memory 3011 and executes the restoration process by determining the content of the status flag.

FIG. 22 shows an outline of a series of restoration processing starting from the state flag check by the control unit 3004. Step S3400 is the start of the restoration process, and steps S3401 to S3407 indicate that the state flag is determined. For example, when the status flag is “0”, all the determinations are “No” in steps S3401 to S3407, the recording / reproduction standby state is set in step S3408, and the restoration process ends in step S3409.

FIG. 23 shows an example of the state of the management information file 3202 and the moving image file 3203 when the state flag is “1”. Since the power was cut off during recording of the moving image data, the recording of the moving image file 3203 in the management information file 3202 is started (indicated by a point P3501).
Only the information up to is reflected, and the management information file 3
A mismatch has occurred between 202 and the moving image file 3203. Therefore, step S3401 is followed by step S
At 3410, the management information file 3202 is expanded in the management information expansion memory 3006, and the size of the moving image file 3203 is obtained from the information recorded therein.
The size obtained here is the moving image file 3203
Since the point P3501 of FIG.
At 411, the point P3 of the moving image file 3203
501 and subsequent data are read from the optical disk 3009, and the stream data is sequentially analyzed to repair the defective portion of the stream data itself and to repair the management information file 3202 by adding a shortage. When the restoration is completed, the restoration result is recorded on the optical disc 3009 in step S3420. In this case, not only the management information file 3202 and the moving image file 3203 but also the management information backup file 3205 records the same contents as the management information file 3202. The moving image file 3203 may be recorded on the optical disk 3009 at the same time as the restoration operation proceeds in step S3411, instead of step S3420.
In step S3421, the restoration has been completed.
The status flag of the status storage memory 3011 is reset to “0”. Thereafter, the recording and reproduction standby state is set in step S3408, and the restoration process ends in step S3409.

If the status flag is “2”, it means that the power is shut off while the management information file 3202 is being recorded, and it is unknown whether the contents are recorded correctly. Therefore, in step S3412 following step S3402, the contents of the management information backup file 3205 are assumed to be the management information file 3202, and are expanded in the management information expansion memory 3006. Subsequent steps are the same as in the case where the status flag is “1”.
Moving image file 320 from the management information developed in
In step S3411, the size of the moving image file 3203 is read from the optical disc 3009, and the stream data is analyzed to perform restoration.

When the status flag is “3”, the moving image file 3203 has been replaced with the still image file 3204 as compared with the case where the status flag is “1”.
Similarly, in step S3413 following step S3403, the management information file 3202 is expanded in the management information expansion memory 3006, and the size of the still image file 3204 is acquired from the information recorded therein. Subsequently, in step S3414, the size of the still image file 3204 and thereafter obtained by the
09, the stream data is sequentially analyzed to repair the defective portion of the stream data itself, and to repair the shortage of the management information file 3202 by adding it. When the restoration is completed, the restoration result is recorded on the optical disk 3009 in step S3420, the state flag of the state storage memory 3011 is reset to “0” in step S3421, the recording / reproduction standby state is set in step S3408, and the restoration processing is performed in step S3409. finish.

When the status flag is “4”, as in the case where the status flag is “2”, the power is turned off while the management information file 3202 is being recorded. is there. Therefore, step S340
In step S3415 following step S4, the contents of the management information backup file 3205 are stored in the management information file 3205.
202, the data is developed in the management information developing memory 3006. Subsequent steps are the same as when the status flag is “3”. The size of the still image file 3204 is acquired from the management information expanded in step S3413, and the size of the still image file 3204 is determined in step S3414.
The data is read from the optical disk 3009 after the acquisition size of 203, and the restoration is executed by analyzing the stream data.

FIG. 24 shows the states of the management information file 3202, the moving image file 3203 and the still image file 3204 when the state flag is “5”. As an example, a case is shown in which a power shutdown occurs while a part of the moving image file 3203 is being deleted. Although points P3601 to P3602 indicate the points to be deleted, it is unknown whether the data was correctly deleted, and the result is not reflected in the management information file 3202. Image file 3
A mismatch has occurred between 203. Although no inconsistency has occurred between the management information file 3202 and the still image file 3204, it is not possible to judge that the state is just by looking at the management information file 3202. Therefore, following step S3405, the management information file 3202 and the management information backup file 3205 are deleted from the optical disk 3009 in step S3416, and the moving image file 3203 is first read from the optical disk 3009 in step S3417, and the stream data is sequentially analyzed from the beginning to the end. By doing so, the defective portion of the stream data itself is repaired, and the repair is executed by newly generating the management information file 3202. Further, by reading the still image file 3204 from the optical disk 3009 and sequentially analyzing the stream data from the beginning to the end, the defective portion of the stream data itself is repaired, and the repaired management information file 320 is restored.
The restoration is performed in the form of appending to step 2. When the restoration is completed, the restoration result is stored in the optical disk 300 in step S3420.
Record in 9. In this case, all files including the management information backup file 3205 are recorded. Note that the moving image file 3203 and the still image file 3204 may be appropriately recorded on the optical disk 3009 simultaneously with the progress of the restoration operation in step S3417 instead of step S3420. In step S3421, the status flag of the status storage memory 3011 is reset to "0", and the recording / reproduction standby state is set in step S3408, and the restoration process ends in step S3409.

When the status flag is “6”, the power is cut off during editing only on the management information file 3202 without editing the AV data file, and the status of the management information file 3202 is determined. It is unknown, but no mismatch has occurred between the management information backup file 3205 and the moving image file 3202 or the still image file 3203. Therefore, in step S3418 following step S3406, the contents of the management information backup file 3205 on the optical disk 3009 are overwritten and recorded as the management information file 3202. Thereafter, the state flag of the state storage memory 3011 is reset to “0” in step S3421, the recording / reproduction standby state is set in step S3408, and the restoration processing ends in step S3409.

If the status flag is “7”, the power is shut off during recording of the management information backup file 3205, so that step S341 follows step S3407.
9, the management information file 3 on the optical disc 3009
202 to the management information backup file 3205
Overwrite recording. Thereafter, similarly to the above, the state flag of the state storage memory 3011 is reset to “0” in step S3421, the recording / reproduction standby state is set in step S3408, and the restoration processing ends in step S3409.

As described above, according to the fifth embodiment of the present invention, a state storage memory is provided, and the state flags of recording, reproduction, and editing operations are appropriately set in a fine manner. Even when the power is turned off, the management information and the AV data can be restored by referring to the status flag by turning on the power again. In addition, since the restoration is performed by directly analyzing the stream data, it is not necessary to include restoration data in the stream data in advance, and the restoration can be started from a necessary portion on the stream data according to the status flag. No extra time is wasted.

Although the present embodiment has been described with respect to a configuration in which the restoration operation is performed unconditionally in accordance with the status flag, a step for asking the operator for an instruction after determining the status flag is provided. It is also possible to perform the repair operation after the operation is performed. However, a mechanism for notifying the operator that there is a problem with the data on the disk, such as displaying a message output when an instruction input that does not perform restoration is performed in the instruction input, must be provided. There is.

In the above restoration processing, there is a case where a defective portion exists in the stream data of the AV data file because the power supply is interrupted during the recording operation. In the following embodiments, a specific repair method will be described by exemplifying the contents of a case where there is a defective portion in the stream data at the time of the above-described repair.

First, the recording format of the AV data file will be described with reference to FIG.

FIG. 25 shows an example of the management information file 32.
FIG. 3 is a diagram showing an outline of a data structure of a moving image file 3203 managed in 02. Moving image file 3203
Is a VOB (Video Object) indicated by reference numeral 3701.
ect) as a series of processing units.
One VOB is usually treated as one recording unit.
It is not particularly limited to this. VOB 3701 is a VOBU (VOB Unit) indicated by reference numeral 3702.
It is composed of multiple units called "units". VOBU
Reference numeral 3702 is a structural unit necessary for performing special reproduction such as fast forward reproduction and fast reverse reproduction, and is a predetermined encoding unit. As an encoding method for image data, as described above, the MPEG2 video method (ISO
/ IEC13818-2) is generally used,
The VOBU 3702 has a configuration including one or more I pictures, which are intra-coded images in the coding method. The VOBU 3702 is synchronized with an appropriate number of video packs (represented with “V”) denoted by reference numeral 3703 and audio packs (represented with “A”) denoted by reference numeral 3704. Multiplexed configuration.
Note that the VOBU 3702 may include a pack other than these two types as an element constituting the VOBU 3702, but is not particularly required for describing the following embodiment. Will be described. As the audio data encoding method, the MPEG2 audio method (ISO / IEC13818-3) may be used similarly to the image data, but the MPEG1 audio method (ISO / IEC111) is used.
72-3) and use of linear PCM sound are not particularly limited. However, as a multiplexing method of the video pack 3703 and the audio pack 3704, an MPEG2 system method (ISO / IEC13818-1) is generally used.

FIG. 26 is a diagram showing the structure of the video pack 3703 and the audio pack 3704. FIG.
FIG. 26A shows the structure of a pack arranged at the head position in the VOBU 3702, and FIG.
2 shows the structure of a pack arranged at a position other than the beginning of the pack. One pack has a fixed length of 2048 bytes. As shown in FIG. 26A, in the case of the beginning of the VOBU 3702, a pack header 3801 of 14 bytes, a system header 3802 of 24 bytes, and a packet header 3
803 and real data 3804 of image or sound. Packet header 3803 and actual data 3
Reference numeral 804 denotes a variable length depending on the data content. By checking the content of the packet data 3803, it is possible to determine whether the pack is a video pack or an audio pack. As shown in FIG. 26B, VOBU3702
In the packs other than the first pack, the structure is such that the system header 3802 is not included as compared with the first pack of the VOBU 3702. Processing units such as VOBs and VOBUs are for managing data in the management information file 3202 only,
When the file 3 or the still image file 3204 is simply viewed as data, they are recognized as a series of stream data multiplexed in accordance with the above-described MPEG2 system standard. For details of these multiplexing schemes themselves, see the aforementioned M
Since it is shown in the PEG2 system standard, a detailed description is omitted here.

FIG. 27 is a diagram for explaining the sixth embodiment of the present invention. In the above-mentioned restoration operation, the management information file 3202 is analyzed by analyzing the moving image file 3203 read from the optical disk 3009. And an example in which the moving image file 3203 itself is restored. Note that “P” in the figure represents a video pack or an audio pack, and m, n, and k are positive integers. As can be seen from the fifth embodiment described above, when the status flag is "5" at the start of the restoration operation and the analysis is performed from the head position of the stream data, the status flag is "1" or "2", and Also when the analysis is performed from the position (point P3501 in FIG. 23), the start position is the position of the pack break. For example, when the stream data analysis for restoration is started from the m-th VOB (represented by VOB # m, hereinafter the same) in FIG. 27, if all the subsequent stream data are normal, the pack header 3801 is detected. Then, by detecting the system header 3802, the break of the VOBU can be known.
The number of packs constituting the OB or VOBU, time information for each VOBU, and the like can be obtained. Also, by analyzing the pack header 3803 and the leading part of the actual data 3804, the number of packs constituting an I picture in the VOBU and time information for decoding can be obtained.
Information of stream data after #m can be reflected in the management information file 3202. In this case, since it is sufficient to perform the analysis continuously for each pack, the actual data 3
Not all 804 need be analyzed.

Here, VOB # m in FIG. 27 is k VOBs.
U and the n-th VOBU (VOBU # n
At the point P3901 (represented by, the same applies hereinafter), it is assumed that a stream data defect such as a missing pack header or system header, or inappropriate time information for decoding is detected. If the management information file 3202 is generated with the defective part left, there is a possibility that a clearly defective playback output may be displayed. Therefore, the VOBU including the point P3901 is deleted from the stream data. I do. The VOBU is V
When the OB is in the middle, the time information for each VOBU becomes discontinuous due to the deletion processing, and therefore, the VOBU is reflected in the management information file 3202 so as to divide the VOB at that location. As a result, VOB # m is composed of (n-1) VOBUs, and VOB # (m + 1) is composed of (kn) VOBUs. Thereafter, restoration is continued until the end of the stream data is reached, and when a defective portion is detected, the same deletion processing as described above is performed.

As described above, according to the sixth embodiment of the present invention, at the time of restoration, the stream data is analyzed in pack units, and when a data defect is detected, the data is deleted in VOBU units to delete the management information. , It is possible to correct the mismatch between the management information file and the AV data file.

FIG. 28 is a diagram for explaining the seventh embodiment of the present invention. As in FIG.
The example shows a case where the management information file 3202 and the moving image file 3203 themselves are restored by analyzing the moving image file 3203 read from the. Further, as in FIG. 27, VOB # m is composed of k VOBUs, and at point P3101 of VOBU # n, stream data such as a missing pack header or system header, or improper time information for decoding. Let us consider a case in which a defect is detected.

The management information file 3 with the defective part left
When the 202 is generated, there is a possibility that a clearly defective playback output may be displayed as in the sixth embodiment. However, in this embodiment, the VOBU including the point P3101 is displayed from the stream data. Instead of deleting them, they are made independent as VOBs, and the handling in the management information is changed from the normal case. That is, the VO in the management information
The attribute of B is set as the “temporary erase” attribute, and for the item determined to be defective, a value that falls within the regulation is recorded as a dummy. For example, when the time information is shifted between the beginning and end of the VOB, the value is corrected to an appropriate value in the management information so that the time information does not change.

When the VOBU is in the middle of the VOB,
Since the VOBU is independently managed as a VOB at the location, the VOBU is reflected in the management information file 3202 so that the location before and after the location is also a new VOB delimiter. As a result, VOB # m is composed of (n-1) VOBUs, VOB # (m + 1) is composed of one VOBU, and VOB # (m + 2) is (kn) VOBUs.
It will be composed of Thereafter, the restoration is continued until the end of the stream data is reached, and when a defective portion is detected, the same processing as described above is performed.

A moving image file 3203 is created based on the management information file 3202 updated by the above-described restoration processing.
Is performed, the VOB # (m + 1) is not reproduced in the normal reproduction because the attribute is set to the "temporary erase" attribute. However, the operator can recognize through the output unit 3010 and the user I / F 3003 in FIG. 19 that there is data of the “temporary deletion” attribute, and can delete the portion later. When the contents of the optical disk 3009 in this state are handled on a PC, for example, all the data can be analyzed because the moving image file 3203 has not been partially processed by the restoration operation.

As described above, according to the seventh embodiment of the present invention, at the time of restoration, stream data is analyzed in pack units, and when a data defect is detected, the VOBU is treated as a VOB in the management information. By managing as the "temporary erasure" attribute, the mismatch between the management information file and the AV data file can be corrected, and no trouble occurs in the reproduction output.

In the above embodiment, the case where eight kinds of values are used as the status flag has been described. However, this is not limited to this, and the value of the status flag is further subdivided or simplified in order to perform a fine restoration process. It is also possible. In the sixth and seventh embodiments, the case where the power is interrupted during recording of the moving image file 3203 is described as a case where the power supply is restored. However, when the status flag is “3” or “4”, the still image is File 320
In the case where the repair operation is performed based on No. 4, the same method as described above can be applied by deleting the VOBU including the defective portion or changing and managing the attribute. Further, in the above embodiments, the method of determining the defective portion on the stream data is not specifically described, but the recorded data amount is extremely small.
The state determined to be defective is not limited to the above-described state, and up to which level the defective state can be changed as appropriate.

In the above embodiment, a camera was described as an example. However, the present invention is not limited to this. For example, a stationary information recording / reproducing apparatus which operates by being supplied with power from an indoor wiring may be used. Since unexpected power interruption occurs, it is possible to carry out the present invention when the power is turned on again in that case.

In the above embodiment, the optical disk such as a DVD disk has been described as an example of the recording medium.
The present invention is not limited to this, and the present invention can be implemented in a device that records information in real time, such as a magnetic disk or a semiconductor memory.

Further, in the above embodiment, the description has been made using the volatile memory as the development memory of the management information. However, the present invention may be applied to a non-volatile memory. Good. In such a case, it is possible to further increase the reliability of the information recording and reproduction processing in response to accidental power-off.

[0155]

As described above, according to the present invention, even if the power supply is unexpectedly cut off and the recording is stopped,
It is possible to generate a bit stream file including information necessary for repairing the management information file written on the recording medium until the recording is stopped and a bit stream file.

Further, according to the present invention, even if the power supply is unexpectedly cut off and the recording is stopped, the management information file and the bit stream file written on the recording medium until the recording is stopped are restored. Can be.

Further, according to the present invention, when the power supply is unexpectedly cut off during recording, the recording is stopped, and when the power is turned on thereafter, it is possible to select whether or not to execute the restoration. If you choose not to do so, you can start the next recording. Restoration can take time, so when shooting outdoors with a recording device such as a camera, the power supply is unexpectedly cut off, recording is stopped, and restoration is performed when the power is turned on again. Then, the next recording cannot be immediately performed on the same recording medium, but even with the same recording medium, recording can be started again immediately, so that waste of time and power can be avoided and user convenience can be improved. .

Further, according to the present invention, a state storage memory is provided to store detailed discrimination information of an operation state.
Even when the power is unexpectedly shut down, the management information file and the AV data file can be restored by referring to the state determination information by turning on the power again. Since the restoration is performed by directly analyzing the stream data, it is not necessary to include the data for restoration in the stream data in advance, and the restoration can be started from a necessary portion on the stream data according to the state determination information. Therefore, no extra time is consumed, and extra power consumption can be omitted.

Further, according to the present invention, at the time of restoration, the stream data is analyzed in a predetermined unit, and when a data defect is detected, the data is deleted in an appropriate coding unit including the corresponding part, and the management information is deleted. , It is possible to correct the discrepancy between the management information file and the AV data file, so that subsequent recording, reproduction,
It does not cause any trouble in the editing operation.

Further, according to the present invention, the stream data is analyzed in a predetermined unit at the time of restoration, and when a data defect is detected, an appropriate coding unit including the relevant portion in the management information can be independently managed. It is possible to correct inconsistency between the management information file and the AV data file by treating it as a high-order encoding unit and managing it as an attribute that does not affect subsequent recording, reproduction, and editing operations, such as the “temporary deletion” attribute. . Since the stream data is not particularly processed, it is possible to refer to all the AV data files on the disk separately.

[Brief description of the drawings]

FIG. 1 is a block diagram of a management information recording system.

FIG. 2 is a configuration diagram of a file recorded on a recording medium.

FIG. 3 is a data configuration diagram of a management information file recorded on a recording medium.

FIG. 4 is a configuration diagram of recording unit information data in a management information file.

FIG. 5 is a configuration diagram of recording unit total information data in a management information file.

FIG. 6 is a configuration diagram of unit time information data in a management information file.

FIG. 7 is a configuration diagram of GOP information data in a management information file.

FIG. 8 is a configuration diagram of recording unit data in a bit stream file.

FIG. 9 is a configuration diagram of management information pack data in a bit stream file.

FIG. 10 is a data configuration diagram of a nonvolatile recording state memory;

FIG. 11 is a block diagram of a management information restoration system.

FIG. 12 is a flowchart illustrating processing of a management information restoration system;

FIG. 13 is a block diagram of an editing device.

FIG. 14 is a diagram showing a configuration of a file recorded on a recording medium.

FIG. 15 is a diagram showing a file configuration recorded on a recording medium.

FIG. 16 is a block diagram of a recording apparatus.

FIG. 17 is a data configuration diagram of a state management nonvolatile memory.

FIG. 18 is a flowchart of a startup process of the recording apparatus.

FIG. 19 is a block diagram showing a fifth embodiment of the information recording / reproducing apparatus according to the present invention.

FIG. 20 is a view showing a directory structure on a disk;

FIG. 21 is a diagram illustrating an example of a state flag stored in a state storage memory;

FIG. 22 is a diagram showing a schematic flow of a repair operation according to a state flag;

FIG. 23 is a diagram showing a data state on a disk when a power is turned off during recording of a moving image file.

FIG. 24 is a diagram showing a data state on a disk when power is turned off during actual data editing.

FIG. 25 is a diagram illustrating a management structure of a moving image file;

FIG. 26 is a diagram showing a pack structure of stream data.

FIG. 27 is a diagram for explaining a sixth embodiment of the information recording / reproducing method according to the present invention.

FIG. 28 is a diagram for explaining a seventh embodiment of the information recording / reproducing method according to the present invention.

[Explanation of symbols]

10: input terminal for analog video data, 20: input terminal for analog audio data, 30: video encoding process, 40: audio encoding process, 50: video / audio / management information multiplexing process, 60: stream buffer, 70 ... Management information generation processing, 80 ... Recording medium drive processing, 90 ... Volatile management information expansion memory, 100 ... Management information expansion processing, 110 ... Integrated management processing, 120 ... Non-volatile recording state memory, 130 ... Recording medium, 140 ... video
/ Audio / Management information separation processing.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tsutomu Imai 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside Digital Media Development Division, Hitachi, Ltd. (72) Inventor Toshihiro Kato 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Address F-term in Hitachi Digital Media Development Headquarters (Reference) EA34 5D110 AA13 AA14 AA27 AA29 DA01 DA08 DA11 DB05 DC05 DC15 DE02 DE04 DE06

Claims (22)

[Claims] 1. A recording data multiplexing means for multiplexing at least video encoded data and audio encoded data, a recording data storage means for storing data outputted from the recording data multiplexing means, and the recording data Management information generating data generating means for generating data necessary for generating management information for reproducing data recorded on the recording medium based on data obtained from the multiplexing means, and storing the management information Management information storage means for generating the management information based on an output from the management information generation data generation means, and writing or reading the management information to or from the management information storage means; A recording medium drive for recording or reading the output information or the information output from the management information generating means on a recording medium. Processing means, recording state storage means for storing state information indicating the state of recording processing, the recording data multiplexing means, the recording data storage means, the management information generation data generation means, the management information generation means, An integrated management unit that manages the management information storage unit, the recording medium drive processing unit, and the recording state storage unit, wherein the integrated management unit writes or reads the state information in the recording state storage unit. An information recording / reproducing apparatus characterized in that the information is output. 2. An information recording / reproducing apparatus according to claim 1, wherein said recording medium drive processing means records or reads information on or from a recording medium, and outputs video encoded data from the information read from said recording medium. Recording data separating means for separating audio encoded data from the recording data; and necessary information for generating management information for reproducing data recorded on the recording medium based on data obtained from the recording data separating means. The management information generation data generating means for generating data; the management information storage means for storing the management information; and the management information storage generating the management information based on an output from the management information generation data generating means. Means for writing or reading the management information, and reading the management information from the information read from the recording medium;
Management information reading means for outputting to the management information storage means, the recording data separation means, the management information generation data generation means, the management information generation means, the management information storage means, the recording medium drive processing means, An integrated management unit that manages the management information reading unit and the recording state storage unit, wherein the recording medium drive processing unit records information output from the management information generation unit on the recording medium; Is an information recording / reproducing apparatus for writing or reading the status information to or from the recording status storage means. 3. An information recording / reproducing apparatus according to claim 1, wherein said recording state storage means is a storage means for storing stored information even when power supply is cut off. Playback device. 4. The information recording / reproducing apparatus according to claim 2, wherein the information recorded on the recording medium is processed to be reproducible information based on the state information read from the recording state storage means. An information recording / reproducing apparatus characterized by the above-mentioned. 5. The information recording / reproducing apparatus according to claim 2, wherein the information read from the recording medium is checked based on the state information read from the recording state storage means, and the information is read from a recording unit including information that cannot be reproduced. An information recording / reproducing apparatus for deleting data up to the end of a file. 6. An information recording / reproducing apparatus according to claim 2, wherein a management unit group composed of information read from said recording medium is examined based on said status information read from said recording status storage means, and information of unreproducible information is checked. The management unit including the included recording unit is deleted, and a range from the beginning of the management unit group to the management unit including the recording unit including the unreproducible information is defined as a first management unit group, and the unreproducible information is included. An information recording / reproducing apparatus, wherein a second management unit group includes a portion from a management unit including a recording unit to an end of the management unit group. 7. The information recording / reproducing apparatus according to claim 2, wherein the information output from the recording data storage means is a data file, and the information output from the management information generating means is the management information. A file as a set is recorded as a first and a second plurality of sets, and a file can be written or read in a predetermined file format on the recording medium, or two files can be read. File system management processing means for managing a file so that a new file can be generated from the first file; first management information file reading processing means for reading the first set of management information files from the file system management processing means; The first set of management information read from the first management information file read processing means as first management information. A first management information storage unit for reading and storing the first management information, and writing the first management information from the first management information storage unit to the file system management processing unit as the first set of management information files Management information file writing processing means, second management information file reading processing means for reading the second set of management information files from the file system management processing means, and second management information file reading processing means. The said read out
The second set of management information of two sets is stored as second management information.
Management information storage means, information stored in the first management information information storage means, and information stored in the second management information storage means, to generate new management information, And a combination processing unit for writing into the management information storage unit, wherein a plurality of sets of the data file and the management information file are combined into one set. 8. The information recording / reproducing apparatus according to claim 7, wherein a plurality of sets of the data file and the management information file recorded on the recording medium are two or more, and the two or more sets are combined into one set. An editing device, characterized in that: 9. The information recording / reproducing apparatus according to claim 7, wherein the first data file and the first management information file recorded on the recording medium are stored on the basis of the status information read from the recording status storage means. The set is checked, and if information that cannot be reproduced is included, the identifier of the first set is changed to a second identifier, and a new data file and a new management information file to be recorded on the recording medium are set as the first set. ,
An information recording / reproducing apparatus for recording on the recording medium. 10. A recording device for recording video and audio on a recording medium, comprising: video encoding means for encoding an analog video signal; audio encoding means for encoding an analog audio signal; Data necessary for generating management information data for random access or special reproduction, data necessary for generating the management information data, and video encoded data output from the video encoding means Video / audio / management information multiplexing means for multiplexing the audio coded data output from the audio coding means, and multiplexed data output from the video / audio / management information multiplexing means, A stream for storing the multiplexed data as a bit stream file on the recording medium by storing the same in an amount. A buffer, a volatile management information expansion memory that stores the management information data, and generates management information data from data necessary for generating the management information data, and writes the management information data in the volatile management information memory.
Management information generating means for writing the management information data to the recording medium as a management information file; management information development means for reading the management information file from the recording medium and developing the management information file in the volatile management information development memory; Recording medium drive means for reading and writing data directly from a medium, nonvolatile recording state memory which is a nonvolatile memory for storing a progress state of a recording process, the video encoding means and the audio encoding means, The video / audio / management information multiplexing means, the stream buffer, the management information generation means, the management information development means, the volatile management information development memory, and the recording medium drive processing are integrally managed, and the processing is performed. Integrated management means for writing and reading the state of the data to and from the nonvolatile recording state memory. Recording apparatus characterized. 11. A video / audio / management information separator for reading the bit stream file recorded on a recording medium and separating video encoded data, audio encoded data, and data necessary for generating management information data. Converting means, a volatile management information expansion memory for storing the management information data, and generating management information data from data necessary for generating the management information data, writing the management information data in the volatile management information memory, and Management information generating means for writing information data to the recording medium as a management information file, management information development means for reading the management information file from the recording medium, and developing the management information file in the volatile management information development memory; Recording medium drive means for directly reading and writing data, and storing the progress of the recording process A non-volatile recording-state memory is a nonvolatile memory, the video / audio /
The management information separating unit, the management information generation unit, the management information expansion unit, the volatile management information expansion memory, and the recording medium drive process are integratedly managed, and the status of the process is stored in the nonvolatile recording state memory. A recording information restoring device, comprising: integrated management means for writing and reading data. 12. A recording medium having an area for recording a plurality of sets of encoded image data files and a management information file for managing the image data files; and writing information to the recording medium, A recording medium drive processing unit that reads information from a recording medium; a file system management processing unit that writes or reads a file in a predetermined file format on the recording medium, or combines two files; A management information file read processing means for instructing the management system to read the management information file from a file system management processing means, and the management information file read from the management information file read processing means are stored as management information development data. Management information expansion memory for storing the management information expansion memo From the management information file writing processing means and the file system management processing means which instructs to write the management information development data to the file system management processing means as the management information file. A backup management information file read processing means for instructing to read a backup management information file, which is a format but different file, and a backup management information file read from the backup management information file read processing means. Backup management information expansion memory for storing as management information expansion data, information of the management information expansion memory, and information of the backup management information expansion memory,
An editing apparatus, comprising: a combination processing unit that combines the image data file and the management information file into one set and writes the management data into the management information development memory. 13. An editing apparatus according to claim 3, wherein said moving image compression encoding means compresses and encodes an analog moving image; audio compression encoding processing means which compresses and encodes analog audio; Multiplexing the moving image compression encoded data output from the image compression encoding processing means and the audio compression encoded data output from the audio compression encoding processing means,
Video and audio multiplexing processing means, and information necessary for generating a management information file are obtained from the video and audio compression and multiplexing processing means, and management information is stored in management information expanded data expanded in the management information expansion memory. Management information expansion data generation processing means for additionally writing as expansion data, a stream buffer for temporarily storing a multiplexed stream output from the moving picture audio compression and multiplexing processing means, and the file system management means for storing the multiplexed data from the stream buffer A stream buffer management means for instructing writing as a multiplexed stream file, a state management nonvolatile memory which is a nonvolatile memory for storing the progress of the recording process, and whether the management information file or the multiplexed Repair to recover to normal format when stream file is abnormal Management means, at startup, monitors the state management nonvolatile memory, instructs to expand the management information file in the management information expansion memory according to the state, management information file to the restoration processing means, It instructs to repair the multiplexed stream file, changes the name of the management information file or the multiplexed stream file to the repair processing means, and replaces a plurality of sets of the image data file and the management information file with one another. A recording apparatus comprising: a start-up processing unit coupled to a set. 14. An information recording / reproducing method for recording management information of the video / audio data together with the video / audio data on a disk and reproducing the video / audio data based on the management information. A control unit for controlling the overall operation is provided, and a storage unit for state storage is provided. The control unit is configured to sequentially store state determination information indicating an operation state such as recording, reproduction, editing, etc. in the storage unit. Sometimes, the control unit reads the state determination information from the storage unit and analyzes the image / audio data according to the state determination information, thereby correcting the management information and the image / audio data themselves to an appropriate format. An information recording / reproducing method characterized in that: 15. The information recording / reproducing method according to claim 14, wherein, based on the state determination information read from the storage means, information after a specific portion of the video / audio data is not reflected in the management information. An information recording / reproducing method, characterized in that when it is determined, the information is obtained from the management information, so that the analysis is performed from a position not reflected in the management information on the video / audio data. 16. The information recording / reproducing method according to claim 14, wherein, based on the state determination information read from the storage means, it is determined that part of the information of the image / audio data is not reflected in the management information. An information recording / reproducing method, wherein analysis is performed from the start position of the image / audio data when the information is reproduced. 17. An information recording / reproducing apparatus using the information recording / reproducing method according to claim 14. 18. The information recording / reproducing method according to claim 14, wherein in the image / audio data analyzing operation performed in accordance with the state determination information, an inappropriate portion is determined in the middle of the image / audio data. An information recording / reproducing method, wherein when detected, a management small unit on the image / audio data including the inappropriate part is deleted. 19. An information recording / reproducing method according to claim 14, wherein in the image / audio data analyzing operation performed in accordance with the state determination information, an inappropriate part is located in the middle of the image / audio data. If detected, the management information is updated so that the management small unit on the image / audio data including the inappropriate portion is handled independently as a higher management unit, and the management information is handled independently. An information recording / reproducing method, wherein the management unit is configured to be treated as a non-reproducing output attribute for management. 20. An information recording / reproducing apparatus using the information recording / reproducing method according to claim 18. 21. A recording data multiplexing step of multiplexing at least video encoded data and audio encoded data, a recording data storing step of storing data output from the recording data multiplexing step, and a recording medium. A management information generation data generation step for generating data necessary for generating management information for reproducing data recorded in the storage device, and generating the management information based on an output from the management information generation data generation step Management information generating step, a management information storage step of storing the management information, a step of reading the management information stored in the management information storage step, and at least information stored in the recording data storage step, Alternatively, the information stored in the management information storage step is recorded on or read from a recording medium. A recording medium drive processing steps,
An information recording / reproducing method, comprising: a recording state storing step of storing state information indicating a state of a recording process; and a step of reading out the state information stored in the recording state storing step. 22. The information recording / reproducing method according to claim 21, wherein said recording medium drive processing step of recording or reading information on or from said recording medium, and video encoded data from the information read from said recording medium. A recording data separating step of separating audio encoded data from the recording data; and a recording data separation step for generating management information for reproducing data recorded on the recording medium based on the data obtained from the recording data separation step. The management information generation data generation step of generating data, the management information generation step of generating the management information based on an output from the management information generation data generation step, and the management information storage storing the management information And outputting to the management information storage step from the management information generation step, or the management information Reading the management information stored in the storage step, reading the management information from the information read from the recording medium, and outputting the management information to the management information storage step; and generating the management information. Recording the information output from the storage medium on the recording medium, a recording state storage step of storing state information indicating a state of a recording process, and a step of reading the state information stored in the recording state storage step. And an information recording / reproducing method.