JPH11312381A - Recording device and method, reproducing device and method, recording and reproducing device and method, recording medium, and providing medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To record a supplied compressed video signal in a recording medium without deteriorating picture quality, and further to enable random access to a recorded video signal. SOLUTION: A feature point detecting circuit 57 detects feature points from a video signal of a base band, and generates a feature point file. A compressed video signal received from digital satellite broadcasting is supplied to a multiplexing circuit 58 in a bit stream as it is. The multiplexing circuit 58 multiplexes this compressed video signal and a feature point file. A control circuit 63 obtains a feature point file from an optical disk 71 and controls reproduction of a compressed video signal at the time of reproduction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus and method, a reproducing apparatus and method, a recording and reproducing apparatus and method, a recording medium, and a providing medium, and particularly to a case where a video signal is recorded and the recorded video signal is reproduced. TECHNICAL FIELD The present invention relates to a recording apparatus and method, a reproducing apparatus and method, a recording and reproducing apparatus and method, a recording medium, and a providing medium which are suitable for use in a computer.

[0002]

2. Description of the Related Art In recent years, as a recordable optical disc, DV
D-RAM and the like have been proposed. Such recordable optical disks have been proposed as large-capacity media of several gigabytes, and are highly expected as media for recording AV (Audio Visual) signals such as video signals.

[0003] Currently, as a supply source of digital AV signals to be recorded on this recordable optical disk, VHS, 8
mm, video tape, digital satellite broadcasting, etc.
In the future, digital terrestrial television broadcasting and the like are conceivable.

Here, digital video signals supplied from these sources are usually MPEG (Moving Picture Exper
In general, the image is compressed by the ts Group 2 method. Therefore, when recording digital video signals supplied from these sources on a recordable optical disc,
The video signal compressed by MPEG2 is decoded once,
Furthermore, it is necessary to encode by the MPEG2 system and record it on the optical disk.

[0005] However, if the decoding and encoding are performed and then recorded on an optical disk, the quality of the recorded video signal is significantly degraded.

Therefore, in order to minimize the deterioration of the image quality, the compressed video signal supplied from the source is recorded on the optical disk as it is without encoding and decoding without changing the supplied bit stream. Is being considered. That is, the use of an optical disc as a data streamer is being studied.

[0007]

On the optical disk on which a video signal is recorded without encoding and decoding, there is no management data for random access to the recorded bit stream. That is, the optical disc on which the video signal is recorded does not record the management information indicating in which sector the start position of the provided program is recorded.
Therefore, it is not possible to randomly access the recorded video signal on the optical disc on which the bit stream from the source is recorded as it is,
The maximum merit of the disc-shaped recording medium is restricted.

[0008] When discriminating between an optical disk on which a bit stream analog-inputted and encoded in a recording device is recorded and an optical disk on which a bit stream from a source is recorded as it is, two types of optical discs are required. , Which leads to higher costs.

SUMMARY OF THE INVENTION The present invention has been made in view of such a situation, and it is an object of the present invention to record a supplied compressed video signal on a recording medium without deteriorating the image quality and to randomly access the recorded video signal. The purpose is to be able to.

[0010]

According to a first aspect of the present invention, there is provided a recording apparatus including: a file creating unit for creating a file including a video or audio signal; and a file included in each file created by the file creating unit. And a recording unit for recording a file and characteristic point information on a recording medium.

According to a fifth aspect of the present invention, there is provided a recording method for creating a file including a video or audio signal, and for each file created in the file creating step, a video or audio signal included in the file is created. The method includes a feature point information creating step of creating feature point information, and a recording step of recording a file and feature point information on a recording medium.

According to a sixth aspect of the present invention, there is provided a file providing step for creating a file including a video or audio signal, and for each file created in the file creating step, a video or audio signal included in the file is created. A computer-readable program for causing an information processing apparatus to execute a process including a feature point information creating step of creating feature point information and a recording step of recording a file and feature point information on a recording medium is provided. And

According to a seventh aspect of the present invention, there is provided a reproducing apparatus for reproducing a file containing a video or audio signal recorded on a recording medium, and for each file reproduced by the file reproducing means, Feature point information reproducing means for reproducing feature point information of a video or audio signal included in the recorded file, and reproduction for controlling reproduction of the file based on the feature point information reproduced by the characteristic point information reproducing means Control means.

[0014] According to another aspect of the present invention, there is provided a reproducing method for reproducing a file containing a video or audio signal recorded on a recording medium, and for each file reproduced in the file reproducing step, a file is recorded on the recording medium. A feature point information playback step of playing back feature point information of a video or audio signal included in the recorded file; and playback controlling file playback based on the feature point information played back in the feature point information playback step. And a control step.

According to a ninth aspect of the present invention, there is provided a recording medium comprising: a file reproducing step of reproducing a file containing a video or audio signal recorded on a recording medium; A feature point information playback step of playing back feature point information of a video or audio signal included in the recorded file; and playback controlling file playback based on the feature point information played back in the feature point information playback step. A computer-readable program for causing an information processing apparatus to execute a process including a control step is provided.

According to a tenth aspect of the present invention, there is provided a recording apparatus, comprising: an input unit to which at least an input signal including a video signal is input; and a feature point for detecting feature point information of a video signal based on a signal included in the input signal. Information detecting means, video signal recording means for recording at least a video signal among signals included in the input signal on a recording medium, and feature point information writing means for writing feature point information to a recording medium. .

According to another aspect of the present invention, there is provided a recording method comprising: an input step of inputting at least an input signal containing a video signal; and feature point information for detecting feature point information of a video signal based on the signal contained in the input signal. It is characterized by including a detection step, a video signal recording step of recording at least a video signal among signals included in the input signal on a recording medium, and a feature point information writing step of writing feature point information on a recording medium.

According to a twelfth aspect of the present invention, there is provided the providing medium, wherein an input step of inputting at least an input signal including a video signal, and feature point information for detecting feature point information of the video signal based on the signal included in the input signal A process including a detecting step, a video signal recording step of recording at least a video signal among signals included in the input signal on a recording medium, and a feature point information writing step of writing feature point information on a recording medium is performed by the information processing apparatus. A computer readable program is provided to be executed.

According to a thirteenth aspect of the present invention, there is provided a recording / reproducing apparatus for creating a file including a video or audio signal, and for each file created by the file creating means, a video or audio signal included in the file. Feature point information creating means for creating feature point information, recording means for recording a file and feature point information on a recording medium, and file reproducing means for reproducing a file containing a video or audio signal recorded on the recording medium For each file reproduced by the file reproducing means, characteristic point information reproducing means for reproducing characteristic point information of a video or audio signal included in the file recorded on the recording medium; and characteristic point information reproducing means. Reproduction control means for controlling reproduction of the file based on the reproduced feature point information. And wherein the Rukoto.

According to a fourteenth aspect of the present invention, there is provided a recording / reproducing method, wherein: a file creating step for creating a file including a video or audio signal; and for each file created in the file creating step, a video or audio signal included in the file. A feature point information creating step of creating feature point information, a recording step of recording a file and feature point information on a recording medium, and a file reproducing step of reproducing a file containing a video or audio signal recorded on the recording medium For each file reproduced in the file reproducing step, a characteristic point information reproducing step of reproducing characteristic point information of a video or audio signal included in the file recorded in the recording medium; and a characteristic point information reproducing step. Controls file playback based on the reproduced feature point information. Characterized in that it comprises a playback control step.

According to a fifteenth aspect of the present invention, there is provided a file providing step for creating a file including a video or audio signal, and for each file created in the file creating step, a video or audio signal included in the file is created. A feature point information creating step of creating feature point information, a recording step of recording a file and feature point information on a recording medium, and a file reproducing step of reproducing a file containing a video or audio signal recorded on the recording medium. For each file reproduced in the file reproducing step, a characteristic point information reproducing step of reproducing characteristic point information of a video or audio signal included in the file recorded in the recording medium, and a reproduction in the characteristic point information reproducing step File playback control based on the extracted feature point information. Computer to execute processing including a control step to the information processing apparatus is characterized by providing a program readable.

In the recording apparatus according to the first aspect, the recording method according to the fifth aspect, and the providing medium according to the sixth aspect, for each file, characteristic point information of a video or audio signal included in the file Is recorded on the recording medium.

In the reproducing apparatus according to the seventh aspect, the reproducing method according to the eighth aspect, and the providing medium according to the ninth aspect, for each file, based on feature point information recorded on the recording medium. , File playback is controlled.

[0024] A recording apparatus according to claim 10, and 11.
According to the recording method described in (1) and the providing medium described in (12), feature point information of the video signal is detected and recorded on the recording medium together with the video signal.

In the recording / reproducing apparatus according to the thirteenth aspect, the recording / reproducing method according to the fourteenth aspect, and the providing medium according to the fifteenth aspect, the file and the characteristic point information for each file are stored in the recording medium. Be recorded. Then, the reproduction of the file is controlled according to the reproduced feature point information.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below. In order to clarify the correspondence between each means of the invention described in the claims and the following embodiments, each means is described. When the features of the present invention are described by adding the corresponding embodiment (however, an example) in parentheses after the parentheses, the result is as follows. However, of course, this description does not mean that each means is limited to those described.

The recording apparatus according to the first aspect of the present invention has a file creating means (for example, step S6 in FIG. 37) for creating a file including a video or audio signal, and a file for each file created by the file creating means. A feature point information creating unit (eg, step S7 in FIG. 37) for creating feature point information of a video or audio signal included in a file, and a recording unit (eg, FIG. 37) for recording a file and feature point information on a recording medium. Step S13).

According to a seventh aspect of the present invention, there is provided a playback apparatus for playing back a file containing a video or audio signal recorded on a recording medium (for example, a playback circuit 60 shown in FIG. 36) and a file playback means. Feature point information reproducing means (for example, a reproduction circuit 60 in FIG. 36) for reproducing feature point information of a video or audio signal included in the file recorded on the recording medium for each of the recorded files; A reproduction control unit (for example, a control circuit 63 in FIG. 36) for controlling reproduction of a file based on the feature point information reproduced by the reproduction unit.

According to a tenth aspect of the present invention, there is provided a recording apparatus, comprising: an input means (for example, step S1 in FIG. 37) to which an input signal including at least a video signal is input; and a video signal based on a signal included in the input signal. Feature point information detecting means for detecting feature point information of (for example, step S7 in FIG. 37)
And video signal recording means for recording at least a video signal among signals included in the input signal on a recording medium (for example,
37, and feature point information writing means (for example, step S13 in FIG. 37) for writing feature point information to a recording medium.

The recording / reproducing apparatus according to the thirteenth aspect is characterized in that a file creation means (eg, step S6 in FIG. 37) for creating a file containing a video or audio signal, and for each file created by the file creation means, 37. Feature point information creating means for creating feature point information of a video or audio signal included in the file (for example, FIG. 37)
Step S7), and a recording means for recording the file and the feature point information on the recording medium (for example, step S1 in FIG. 37).
3), a file reproducing unit (for example, a reproducing circuit 60 in FIG. 36) for reproducing a file containing a video or audio signal recorded on the recording medium, and a recording medium for each file reproduced by the file reproducing unit. Feature point information reproducing means (for example, a reproducing circuit 60 in FIG. 36) for reproducing feature point information of a video or audio signal contained in the file recorded in the file, and feature point information reproduced by the feature point information reproducing means. And a playback control unit (for example, the control circuit 63 in FIG. 36) for controlling the playback of the file based on.

First, the file arrangement on a recording medium on which information is recorded or reproduced in the present invention will be described. As shown in FIG. 1, the following seven types of files are recorded on the medium. VOLUME.TOC ALBUM.STR PROGRAM _ $$$. PGI TITLE _ ###. VDR CHUNKGROUP _ @@@. CGIT CHUNK _ %%%%. ABST CHUNK _ %%%%. MPEG2

The root directory contains VOLUME.TOC and
ALBUM.STR is placed. In a directory "PROGRAM" immediately below the root directory, "PROGRAM _ $$$. PGI" (where "$$$" represents a program number) is placed. Similarly, in the directory "TITLE" immediately below the root directory, "TITLE _ ###. VDR" (where "###" represents the title number), but in the directory "CHUNKGROUP", "CHUNKGROUP_
@@@. CGIT "(where" @@@ "represents the chunk group number), but the directory" CHUNK "contains" CHUNK _ %%%%. ABST "
(Where "%%%%" represents the chunk number), respectively.

In the MPEGAV directory immediately below the root directory, one or more subdirectories are further created, under which "CHUNK _ %%%%. MPEG2" (where %%%% represents a chunk number). Is placed.

[0034] The file of VOLUME.TOC is stored on the media as 1
There is usually one. However, there may be a plurality of media having a special structure such as a media having a hybrid structure of ROM and RAM. This file is used to indicate the overall nature of the media.

The structure of VOLUME.TOC is as shown in FIG. The file_type_id is placed at the head, which indicates that the file is VOLUME.TOC. Then volu
me_information () follows, followed by text_block ().

FIG. 3 shows the structure of volume_information (). This is volume_attribute (), resume (), vo
lume_rating (), write_protect (), play_protect (), re
Contains cording_timer ().

Volume_attribute () is an area for recording an attribute of a logical volume, and its detailed structure is shown in FIG. As shown in FIG.
playback_mode_flag, program_playback_mode_flag, etc. are included.

Resume () is executed when the media is reinserted.
This is an area for recording information for restoring the state immediately before t, and its detailed structure is shown in FIG.

Volume_rating () in FIG. 3 is an area for recording information for realizing the viewing age restriction on the entire volume according to the age and the category, and its detailed structure is as follows.
This is shown in FIG.

Write_protect () in FIG. 3 is an area for recording information for restricting changes to the title and program recorded in the volume and for erasing operations, and its detailed structure is shown in FIG. I have.

Play_protect () shown in FIG. 3 is an area for recording information for setting permission / non-permission of the title and program recorded in the volume or for limiting the number of times of reproduction, and has a detailed structure. , Shown in FIG.

Recording_timer () in FIG. 3 is an area for recording information for controlling the recording time, and its detailed structure is shown in FIG.

The detailed structure of text_block () of VOLUME.TOC in FIG. 2 is shown in FIG. In this text_block (),
language_set () and text_item are included, and their detailed structures are shown in FIGS. 11 and 12, respectively.

Normally, there is one ALBUM.STR file in FIG. 1 on a medium. However, there may be a plurality of media having a special structure such as a media having a hybrid structure of ROM and RAM. This file is used to combine a plurality of media into a configuration as if it were one media.

The structure of the ALBUM.STR is as shown in FIG. A file_type_id is placed at the beginning to indicate that the file is ALBUM.STR. Next is album (), followed by text_block ().

"Album ()" is an area for recording information for treating a plurality of volumes (a plurality of media) as one unit, and its detailed structure is shown in FIG.

The number of TITLE _ ###. VDR files in FIG. 1 is equal to the number of titles. The title is, for example, compact
One song on a disc or one program on a television broadcast. The structure of this information is as shown in FIG.
The file_type_id is placed at the head, which indicates that the file is TITLE _ ###. VDR. Then title_inf
o () follows, followed by text_block (). ### is a character string indicating the title number.

Title_info () is a chunkgroup
This is an area for recording the start point, end point of title, and other attributes related to title, and its detailed structure is shown in FIG.

There are as many PROGRAM _ $$$. PGI files in FIG. 1 as the number of programs. The program is composed of a plurality of cuts specifying a part (or all) of the title, and each cut is reproduced in a specified order. The structure of this information is shown in FIG. File_typ at the beginning
e_id is placed to indicate that the file is PROGRAM _ $$$. PGI. Next is program (), and finally text_bloc
k () follows. $$$ is a character string indicating the title number.

The program () is an area for recording information necessary for collecting and reproducing necessary parts of the title without irreversibly editing the material. The detailed structure is as shown in FIG. It is shown at 18.

The program () in FIG. 18 has one play_list. Details of this play_list () are shown in FIG.

The play_list includes a plurality of play_item (). The details of play_item () are shown in FIG.

The number of files of CHUNKGROUP _ @@@. CGIT in FIG. 1 is equal to the number of chunk groups. A chunk group is a data structure for arranging bit streams. This file is not recognized by the user as long as the user normally operates a device for recording and reproducing media, such as a VDR (Video Disc Recorder).

The structure of this information is as shown in FIG. File_type_id is placed at the beginning, and the file
Indicates that it is CHUNKGROUP _ @@@. CGIT. Then chunk
group_time_base_flags and chunkgroup_time_base_offset
, Then chunk_connection_info (), and finally text_bl
ock () follows.

Chunkgroup_time_base_flags is chunkgro
Indicates the flag related to the up counter, chunkgroup_tim
e_base_offset indicates the start time of the reference time axis in the chunkgroup. This is a value to be set in a counter that counts up at 90 kHz and has a size of 32 bits. chunk_connection_info () is used for switching points of video, vi
This is an area for storing information of a unique point such as synchronization of deo and audio, and its detailed structure is shown in FIG.

In chunk_connection_info (), chunk_arrangem is the number of chunks belonging to the chunk group.
A loop of ent_info () is placed. FIG. 23 shows this chunk_ar
The details of rangement_info () are shown.

The number of files of CHUNK _ %%%%. ABST in FIG. 1 is equal to the number of chunks. A chunk is an information file corresponding to one stream file. The structure of this information is as shown in FIG. File_type_id at the beginning
Is placed, and the file is changed to CHUNK _ %%%%. ABS
T is shown.

The file of CHUNK _ %%%%. MPEG2 in FIG. 1 is a stream file. This file stores an MPEG bit stream, which is different from other files that record only information.

FIG. 25 shows an example of the configuration of an optical disk apparatus for recording or reproducing information on or from an optical disk as a medium having the above-mentioned files. In this optical disk device, one system of optical head 2 is provided for one rewritable optical disk 1, and this optical head 2 is shared for both reading and writing of data.

The bit stream read from the optical disk 1 by the optical head 2 is demodulated by an RF and demodulation / modulation circuit 3, error-corrected by an ECC circuit 4, and read through a switch 5 to determine a read rate and It is sent to the read channel buffer 6 for absorbing the difference from the decoding processing rate. The output of the read channel buffer 6 is supplied to a decoder 7. The read channel buffer 6 is configured so that the system controller 13 can read and write.

The bit stream output from the read channel buffer 6 is decoded by the decoder 7,
The video signal and the audio signal are output therefrom. The video signal output from the decoder 7 is input to the synthesizing circuit 8 and synthesized with the video signal output from the 0SD (On Screen Display) control circuit 9, and then output from the output terminal P 1 to a display (not shown) to be displayed. Is done. The audio signal output from the decoder 7 is sent from an output terminal P2 to a speaker (not shown) and reproduced.

On the other hand, the video signal input from the input terminal P3 and the audio signal input from the input terminal P4 are encoded by the encoder 10 and then written to absorb the difference between the encoding processing rate and the writing rate. The data is sent to the channel buffer 11. This write channel buffer 11 is also used by the system controller 1.
3 can be read and written.

The data stored in the write channel buffer 11 is read out from the write channel buffer 11 and input to the ECC circuit 4 via the switch 5 to which an error correction code is added. The signal is modulated by the modulation circuit 3. A signal (RF signal) output from the RF and demodulation / modulation circuit 3 is written on the optical disk 1 by the optical head 2.

The address detection circuit 12 detects address information of a track to be recorded or reproduced on the optical disc 1. The system controller 13 controls the operation of each unit of the optical disk device, and performs various controls.
It has a CPU 21, a ROM 22 storing processing programs to be executed by the CPU 21, a RAM 23 for temporarily storing data and the like generated during the processing, and a RAM 24 for storing various information files to be recorded on or reproduced from the optical disc 1. doing. The CPU 21 finely adjusts the position of the optical head 2 based on the detection result of the address detection circuit 12. CPU
Reference numeral 21 also controls switching of the switch 5. The input unit 14 including various switches and buttons is operated by the user when inputting various commands.

Next, a basic information file reading operation will be described. For example, when reading the "VOLUME.TOC" information file, the system controller 13
The CPU 21 determines the physical address on the optical disk 1 where "VOLUME.TOC" is recorded and the length of the physical address by using a file system operation instruction previously incorporated in the processing program. Subsequently, the CPU 21 sets the "VOLUME.TOC"
The optical head 2 is moved to the reading position on the basis of the address information. Then, the CPU 21 sets the optical head 2, the RF and demodulation / modulation circuit 3, and the ECC circuit 4 to the read mode, switches the switch 5 to the read channel buffer 6, and further fine-tunes the position of the optical head 2. Thereafter, reading by the optical head 2 is started. As a result, the contents of “VOLUME.TOC” are read by the optical head 2, demodulated by the RF and demodulation / modulation circuit 3, error-corrected by the ECC circuit 4, and then stored in the read channel buffer 6. You.

When the amount of data stored in the read channel buffer 6 becomes equal to or larger than the size of "VOLUME.TOC", the CPU 21 stops reading. Thereafter, the CPU 21 reads the corresponding data from the read channel buffer 6 and stores the data in the RAM 24.

Next, a basic information file writing operation will be described by taking as an example a case where a "VOLUME.TOC" information file is written. The CPU 21 uses a file system operation instruction incorporated in the processing program in advance,
In the file system (optical disc 1), a free area having a size equal to or larger than "VOLUME.TOC" to be written is searched for, and its address is determined.

Next, the CPU 21 transfers the “VOLUME.TOC” to be newly written prepared in the RAM 24 to the write channel buffer 11. Subsequently, the CPU 21
The optical head 2 is moved to the writing position based on the address information of the empty area. Then, the CPU 21 controls the optical head 2,
The RF and demodulation / modulation circuit 3 and the ECC circuit 4 are set to the write mode, the switch 5 is switched to the write channel buffer 11, and the position of the optical head 2 is finely adjusted. Let it.

As a result, the newly prepared “VOLUME.TOC” is read from the write channel buffer 11, input to the ECC circuit 4 via the switch 5, added with an error correction code, and And modulated by the demodulation / modulation circuit 3. The signal output from the RF and demodulation / modulation circuit 3 is recorded on the optical disk 1 by the optical head 2. The amount of data read from the write channel buffer 11 and recorded on the optical disc 1 is "VOLUME.TO
At the time when the size becomes equal to the size of C ", the CPU 21 stops the writing operation.

Finally, the CPU 21 uses a file system operation instruction incorporated in the processing program in advance, and reads “VOLUME.TO” in the file system (optical disc 1).
The pointer indicating "C" is rewritten so as to indicate the newly written position.

Next, the basic stream reproduction operation will be described by taking as an example the case where the stream CHUNK_0001.MPEG2 in FIG. 1 is reproduced. The CPU 21 determines the physical address on the optical disc 1 where “CHUNK_0001.MPEG2” is recorded and the length of the physical address by using a file system operation instruction incorporated in the processing program in advance. Subsequently, the CPU 21 moves the optical head 2 to the reading position based on the address information of “CHUNK_0001.MPEG2”.
Then, the optical head 2, the RF and demodulation / modulation circuit 3, and the ECC circuit 4 are set to the read mode, the switch 5 is switched to the read channel buffer 6, and the position of the optical head 2 is finely adjusted. 2 is started.

"CHUNK_000" read by the optical head 2
1. The content of MPEG2 is RF and demodulation / modulation circuit 3, ECC
The data is accumulated in the read channel buffer 6 via the circuit 4 and the switch 5. The data stored in the read channel buffer 6 is output to the decoder 7 and subjected to a decoding process to output a video signal and an audio signal. The audio signal is output from the output terminal P2, and the video signal is output from the output terminal P1 via the synthesizing circuit 8.

The data is read from the optical disc 1, decoded,
When the displayed data amount becomes equal to the size of “CHUNK_0001.MPEG2”, or when the stop of the reading operation is designated from the input unit 14, the CPU 21 stops the reading and decoding processing.

Next, the basic stream recording operation is described as “C
HUNK_0001.MPEG2 "An example of writing an information file will be described. The CPU 21 uses a file system operation instruction incorporated in the processing program in advance, and writes" CHUNK_0001.MPEG2 "in the file system (optical disc 1). A free area having a size equal to or larger than MPEG2 "is searched for, and its address is determined.

A video signal input from the input terminal P3,
And the audio signal input from the input terminal P4
After being encoded by the encoder 10, it is stored in the write channel buffer 11. Subsequently, the CPU 21
Moves the optical head 2 to the writing position based on the address information of the empty area. Then, the CPU 21 sets the optical head 2, the RF and demodulation / modulation circuit 3, and the ECC circuit 4 to the write mode, and switches the switch 5 to the write channel buffer 11 side.
After fine adjustment of the position, writing by the optical head 2 is started. With this, the newly prepared "CHUNK_0001.MPEG
2 "is read from the write channel buffer 11 and input to the optical head 2 via the switch 5, the ECC circuit 4, the RF and demodulation / modulation circuit 3, and the optical disk 1
Will be recorded.

When the amount of data read from the write channel buffer 11 and recorded on the optical disk 1 becomes equal to a preset value, or when the input unit 14 designates stop of the write operation, the CPU 21 Stop the write operation. Finally, the CPU 21 rewrites the pointer pointing to "CHUNK_0001.MPEG2" in the file system (optical disc 1) so as to point to the newly written position, using a file system operation instruction previously incorporated in the processing program. .

Now, it is assumed that an information file and a stream file as shown in FIG. 26 are recorded on the optical disc 1. In this example, a file of one program named “PROGRAM_001.PGI” is included. Also, this optical disc 1 includes “TITLE_001.VDR”, “TITLE_
002.VDR "and three title files named" TITLE_003.VDR ".

Further, this optical disc 1 has "CHUNKGR
OUP_001.CGIT ”and“ CHUNKGROUP_002.CGIT ”include files of two chunk groups, and this optical disc 1 includes“ CHUNK_0001.MPEG2 ”and“ CHUNK_0011.
In addition to three stream files named "MPEG2" and "CHUNK_0012.MPEG2", information corresponding to each of them is "CHUNK_0001.ABST" and "CHUNK_0012".
0011.ABST "and three information files" CHUNK_0012.ABST ".

The logical structure of the optical disc 1 having the information file and the stream file shown in FIG. 26 is as shown in FIG. In this example, the chunk information file "C
HUNK_0001.ABST "is the stream file" CHUNK_0001.M
PEG2 "and the chunk information file" CHUNK_0011.ABST "
Specifies the stream file "CHUNK_0011.MPEG2", and the chunk information file "CHUNK_0012.ABST" specifies the stream file "CHUNK_0012.MPEG2". Specifically, in FIG. 24, CHUNK _ %%%%.
The file ID of the stream is specified in a field called hunk_file_id.

Further, in this example, the chunk group information file "CHUNKGROUP_001.CGIT" is a chunk information file "CHUNK_0001.ABST", and the chunk group information file "CHUNKGROUP_002.CGIT" is a chunk information file "CHUNK_0011.ABST". And "CHUNK_0012.ABST" are specified respectively. Specifically, the chunk_arrang in FIG.
The file ID of chunk information is specified in a field called chunk_info_file_id in ement_info (). This chun
k_arrangement_info () exists in the chunk group information file and has a data structure in which the number of chunks belonging to the corresponding chunk group exists (chun in FIG. 23).
k_arrangement_info () corresponds to chunk_connection_i in FIG.
This chunk_connection_info () is described in nfo ()
Is described in CHUNKGROUP _ ###. CGIT in FIG. 21).

CHUNKGROUP_001 contains chunk_arrangement_
There is only one info (), and the chunk_info_file_id in it is
CHUNK_0001 is specified. CHUNKGROUP_002 contains chun
There are two k_arrangement_info (), in each of which
CHUNK_0011 and CHUNK_0012 are specified. For such a case, the chunk group can specify a reproduction order of a plurality of chunks.

Specifically, first, the CHUNKGROUP_ # in FIG.
The initial value of the clock in the corresponding chunk group is determined by chunkgroup_time_base_offset in ##. CGIT. Next, when registering each chunk, the chunk_arrangemen in FIG.
presentation_start_cg_count and presentationatio of t_info ()
n_end_cg_time_count is specified.

For example, as shown in FIG.
Is the length (time) of A and B is the length (time) of CHUNK_0012. The presentation_start_cg_count of CHUNK_0011 is chunk
equal to group_time_base_offset, presentation_end_c
g_count is equal to "chunk_group_time_base_offset + A". Also, the presentation_start_cg_count of CHUNK_0012 is c
hunkgroup_time_base_offset + A, presentation
_end_cg_count is "chunk_group_time_base_offset + A + B"
be equivalent to. With this setting, CHUNKGROUP_002
CHUNK_0011 and CHUNK_0012 are defined as being continuously reproduced.

When the reproduction times of CHUNK_0011 and CHUNK_0012 overlap, the time can be specified by shifting the times. Also, chunk_arrangement_in in FIG.
By describing the transition_info () in the fo (), a special effect (fade-in, fade-out, wipe, etc.) can be specified in the transition between two streams.

In the example of FIG. 26 (FIG. 27), the title information files “TITLE_001.VDR” and “TITLE_002.VDR” are the chunk group information file “CHUNKGROUP_001.CGIT”, and the title information file “TITLE_003.VDR” is Each chunk group information file "CHUNKGROUP_002.CGIT" is specified. Specifically, in the title_info () of FIG. 16, a file ID of the chunk group is specified in a field called cgit_file_id, and further, title_start_ch
unk_group_time_stamp and title_end_chunk_group_time_s
The tamp field specifies the time range within which the title is defined in the chunk group.

For example, in the example of FIG. 27, CHUNKGROUP_001
TITLE_001 indicates the first half, and TITLE_002 indicates the second half. Note that this division is performed at the request of the user, and the position is arbitrary for the user and cannot be determined in advance. Where TITLE_
It is assumed that the position of division by 001 and TITLE_002 is set to a position separated by A from the head of CHUNKGROUP_001.

TITLE_001 is CHUNK as a chunk group
Specify GROUP_001 and set CHUNK as the start time of the title.
Specify the start time of GROUP_001 and the time of the point specified by the user as the end time of the title.

That is, title_start_chunk_gro of TITLE_001
chunkgroup_ti of CHUNKGROUP_001 as up_time_stamp
me_base_offset (start position) is set and TITLE_001
CHUNKGRO as title_end_chunk_group_time_stamp
A value obtained by adding the length of A to chunkgroup_time_base_offset of UP_001 is set.

TITLE_002 designates CHUNKGROUP_001 as the chunk group, designates the time of the point designated by the user as the start time of the title, and designates the end time of CHUNKGROUP_001 as the end time of the title.

That is, title_start_chunk_gro of TITLE_002
chunkgroup_ti of CHUNKGROUP_001 as up_time_stamp
A value obtained by adding the length of A to me_base_offset (start position) is set, and title_end_chunk_group_time_ of TITLE_002 is set.
As stamp, chunkgroup_time_base_ of CHUNKGROUP_001
The value obtained by adding the length of CHUNKGROUP_001 to offset is set.

Further, TITLE_003 specifies CHUNKGROUP_002 as the chunk group, specifies the start time of CHUNKGROUP_002 as the start time of the title, and specifies the end time of CHUNKGROUP_002 as the end time of the title.

That is, title_start_chunk_gro of TITLE_003
chunkgroup_ti of CHUNKGROUP_002 as up_time_stamp
me_base_offset is set and title_end_chu of TITLE_003
chunkgr of CHUNKGROUP_002 as nk_group_time_stamp
oup_time_base_offset is added to the length of CHUNKGROUP_002.

Further, in this example, the program information file “PROGRAM_001.PGI” includes a part of TITLE_001 and TITLE_00
Part 3 is specified to be played in this order.
Specifically, one cut is extracted by specifying a title by title_number in play_item () in FIG. 20 and defining a start point and an end point at the time defined by each title. A program is constructed by collecting a plurality of such cuts.

Next, the operation for additionally recording (append recording) new information on the optical disk 1 will be described.
This recording is, for example, by timer recording,
Alternatively, the recording is performed by the user operating the input unit 14 to instruct the optical disc apparatus to perform recording in real time. In the latter case, the recording end time cannot be predicted when the recording button is pressed, but when the button of the one-touch recording function (a function that performs recording for a certain period of time after operation) is pressed. , The end time can be predicted.

Here, the timer recording will be described as an example. In this case, it is assumed that the user of the optical disk device has previously specified the recording start time, the recording end time, the bit rate of the bit stream, the channel on which recording is performed, and the like. It is also assumed that at the time when the recording is reserved, it is previously confirmed that the optical disc 1 has a free space corresponding to the bit rate and the recording time.

In the case where further recording is performed on the optical disk 1 between the time of recording reservation and the time of execution of the reserved recording, the currently reserved program is recorded at the designated bit rate. In some cases, it may not be possible to secure sufficient capacity. In such a case, the CPU 21 lowers the bit rate from the specified value and records the information for the reserved time, or records only the recordable time while keeping the bit rate as it is. To do it.
At this time, the CPU 21 performs further recording, and when a problem occurs in the reserved recording, it goes without saying that the CPU 21 issues a message notifying the user to that effect.

When the scheduled recording start time approaches, the CPU 21 uses a built-in timer or clock to execute
The mode is automatically returned from the sleep mode to the operation mode. Then, the CPU 21 uses a file system operation instruction incorporated in the processing program in advance,
The area on the optical disc 1 where only reserved programs can be recorded
Secure on top. That is, the value obtained by multiplying the result (recording time) obtained by subtracting the start time from the end time of the scheduled recording by the bit rate is the size of the area necessary for recording the reserved program, and the CPU 21 First, secure an area. In addition, when an information file needs to be recorded in addition to the stream file at the time of this recording, for example, when a title information file or the like is required to be registered as a new title, a capacity sufficient to record the information file is required. Must be secured on the optical disc 1. If a necessary area cannot be secured, the above-described method (method of changing a bit rate, recording only within a recordable time, etc.) is taken.

At this time, since a new title is recorded, the user gives the file name of the new stream file as a new stream file in a new stream directory. Here, this is \ MPEGAV \ STRE
MS_003 \ CHUNK_0031. That is, as shown in FIG. 29, the file is named CHUNK_0031.MPEG2 under the STREAM_003 directory under the MPEGAV directory under the root directory.

The CPU 21 instructs each unit to execute the recording mode. For example, a video signal input to the input terminal P3 from a tuner (not shown) and an audio signal input to the input terminal P4 are encoded by the encoder 10 and then stored in the write channel buffer 11. Subsequently, the CPU 21 moves the optical head 2 to the writing position based on the address information of the previously secured area. Then, the CPU 21 sets the optical head 2, the RF and demodulation / modulation circuit 3, and the ECC circuit 4 to the write mode, switches the switch 5 to the write channel buffer 11, and finely adjusts the position of the optical head 2. Then, writing by the optical head 2 is started. As a result, the content of the newly prepared "CHUNK_0031.MPEG2" is read from the write channel buffer 11, and is passed through the switch 5, the ECC circuit 4, the RF and demodulation / modulation circuit 3, and the optical head 2, and the optical disk 1 Will be recorded.

The CPU 21 stops the write operation when any of the following conditions occurs after continuing the above write operation. 1) When the end time of the reserved recording is reached 2) When recording on the optical disc 1 becomes impossible due to lack of capacity or other causes 3) When stop of the recording operation is instructed

Next, the CPU 21 rewrites the pointer indicating "CHUNK_0031.MPEG2" in the file system to a value indicating the newly written position, using a file system operation instruction previously incorporated in the processing program. Further, the CPU 21 prepares each file of the chunk information, the chunk group information, and the title information, and records them with an appropriate name. At the time of recording or reservation, it is necessary to secure enough free space on the optical disc 1 for recording these files.

In this way, a new information file is created as shown in FIG. 30, for example. In the figure,
The file name with an asterisk (*) on the right shoulder is
This is a newly created file.

FIG. 31 shows the relationship between newly created information files. TITLE_004 is CHUNKGROUP_
003, CHUNKGROUP_003 specifies CHUNK_0031, C
HUNK_0031 specifies STREAM_0031.

That is, the new stream is TITLE_004
Is registered in the information file. The user can confirm TITLE_00
4 can be known, and TITLE_004 can be reproduced.

Next, an operation for overwriting and recording on the optical disc 1 as illustrated in FIG. 26 (FIG. 27) will be described. Overwrite recording refers to an operation of recording a new program on a previously recorded program (erasing the program), as in the case of recording a signal on a video tape.

In the overwrite recording, the position where the overwrite recording starts is important. For example, suppose that the user specifies to start overwrite recording from the beginning of TITLE_001. At this time, the overwrite recording is performed while rewriting TITLE_001, TITLE_002, and TITLE_003 in order. If the recording operation is not completed even after rewriting to the end of TITLE_003, a new area is secured in a free area on the optical disc 1 and recording is continued. For example, when TITLE_002 is set as the recording start position, TITLE_001 is located before the recording start position, and is not rewritten by the current recording operation.

Now, it is assumed that timer recording is overwritten from the beginning of TITLE_003. In this case, it is assumed that the user of the optical disk device has previously specified the recording start time, the end time, the bit rate of the bit stream, the channel on which recording is performed, and the like. In the overwrite recording, it is assumed that an important recording start position is designated as the head of TITLE_003.
Also in this case, it is assumed that it is confirmed in advance that the capacity corresponding to the bit rate and the recording time exists on the optical disc 1 at the time of making the recording reservation. In the case of overwriting, the sum of the total capacity of a plurality of titles that can be overwritten from the designated position and the free capacity of the optical disc 1 is the recordable capacity. In other words, in this case, the stream STREAM_0011 managed by TITLE_003 is
The sum of the total capacity of STREAM_0012 and the free space on the optical disc 1 is the recordable capacity.

In overwrite recording, there are several options in which order actual recording should be performed for the recordable capacity. First, a method that can be considered first is a method of recording in the order of the stream specified by the title. In other words, in this case, first, STREAM
Start recording from the beginning of STREAM_0011, and continue recording from the beginning of STREAM_0012.
After recording until the end of TREAM_0012, this is a method of recording in an empty area. Another method is a method in which recording is first performed in an empty area, and when the empty area is exhausted, recording is performed on an existing stream.

The former method is superior in emulating a video tape. In other words, the operation is similar to that of a video tape, and has a feature that the user can easily understand the operation. The latter method has a feature that it is excellent in protection of recorded data because erasure of the already recorded data stream is postponed.

In the case where further recording is performed on the optical disc 1 between the recording reservation and the execution of the reserved recording, the program reserved this time is recorded at the designated bit rate. In some cases, it is not possible to secure enough capacity. In such a case, as in the case described above, the bit rate is automatically reduced at the time of executing the reservation, and all the recording is performed for the reserved time. Only recording is done.

When the reserved recording start time approaches, the optical disk device returns from the sleep mode to the operation mode. The CPU 21 secures all free space on the optical disc 1. Of course, there is a method of not securing the free space at this time but securing it when it becomes necessary. However, here, for the sake of explanation, it is assumed that a necessary area is secured before the start of recording.

Since the start time, end time, and bit rate are specified in timer recording or the like, if the size of the necessary area is known in advance, only the necessary area (or some The capacity may be ensured (by an amount corresponding to the addition of the margin). When an information file needs to be recorded at the time of this recording, for example, when a title information file or the like is required to be registered as a new title, it is necessary to leave a sufficient capacity for recording such an information file. is there.

Here, the file name of the new stream file is given as a new stream file in the new stream directory. In other words, here, the file name is \ MPEGAV \ STREMS_002 \ CHUNK_0031
And That is, as shown in FIG. 32, a file named CHUNK_0031.MPEG2 under the STREAM_002 directory under the MPEGAV directory under the root directory is created.

The video signal input to the input terminal P3 and the audio signal input to the input terminal P4 are encoded by the encoder 10 and then stored in the write channel buffer 11. Subsequently, the CPU 21
Based on the address information of the previously secured area, the optical head 2
Is moved to the writing position. Then, the CPU 21 sets the optical head 2, the RF and demodulation / modulation circuit 3, and the ECC circuit 4 to the write mode, switches the switch 5 to the write channel buffer 11, and finely adjusts the position of the optical head 2. Then, writing by the optical head 2 is started. As a result, "CHUNK_0031.
The contents of “MPEG2” are read from the write channel buffer 11 and recorded on the optical disk 1 via the switch 5, the ECC circuit 4, the RF and demodulation / modulation circuit 3, and the optical head 2.

At this time, first, the stream file "CHUNK
_0011.MPEG2 "is rewritten, and" CHUNK_0011.MP
After recording to the end of "EG2", then "CHUNK_0012.
The recording is advanced to "MPEG2", and further, "CHUNK_0031.MPEG2"
Recording is advanced to.

The above operation is continued and, as in the case described above, when any of the three conditions occurs, the CPU 21
Stops the write operation.

Next, the CPU 21 updates the stream file, the chunk information, the chunk group information, and the title information by using the file system operation instruction previously incorporated in the processing program.

By the way, the structure of the file changes depending on the timing at which the writing is completed. For example, CHUNK_
After the overwriting of two streams of 0011.MPEG2 and CHUNK_0012.MPEG2 is completed, and further recording is performed on CHUNK_0031.MPEG2, the file configuration of the optical disc 1 is as shown in FIG.
It becomes as shown in. An asterisk on the right shoulder of the file name
The files with (*) are the newly created files.

FIG. 34 shows the relationship between the newly created files (the files in FIG. 33). As is apparent from comparison with FIG. 31, TITLE_003
As CHUNK included in CHUNKGROUP_002 specified by C
HUNK_0031 is increasing, and CHUNK_0031 specifies STREAM_0031.

On the other hand, if the overwrite recording ends in the middle of the overwriting of the existing stream, for example, if the overwriting recording ends in the middle of the recording of CHUNK_0011, the stream of CHUNK_0031 reserved for overwriting is opened because it was not overwritten. Is done. In this case, a special title process is performed. That is, overwrite recording is started from the beginning of TITLE_003, and when recording is completed halfway, the title is divided there. That is, as shown in FIG. 35, a portion from the overwrite recording start position to the end position is set as a new TITLE_003, and subsequent portions (the rest of the original TITLE_003) are TITLE_003.
_004.

Next, the operation of reproducing a title will be described. Now, it is assumed that the optical disk 1 having a file as shown in FIG. 26 is inserted into the optical disk device and the title is reproduced. First, when the optical disk 1 is inserted, the CPU 2
1 reads the information file from the optical disc 1 and stores
24. This operation is performed by repeating the above-described basic information file reading operation.

The CPU 21 first sets VOLUME.TOC and ALBUM.STR
Is read. Next, the CPU 21 checks how many files having the extension “.VDR” exist under the directory “TITLE”. A file having this extension is a file having title information, and the number of files is the number of titles. In the example of FIG. 26, the number of titles is three.
Next, the CPU 21 reads the three title information files and stores them in the RAM 24.

The CPU 21 controls the OSD control circuit 9 to generate character information indicating the information of the title recorded on the optical disk 1, and to combine the generated character information with the video signal by the combining circuit 8, and from the output terminal P1 to the display. Output and display. In this case, there are three titles, and the length and attributes (name, recorded date and time, etc.) of each of the three titles are displayed.

Here, it is assumed that the user has designated, for example, reproduction of TITLE_002. In the information file of TITLE_002 (in cgit_file_id in title_info () in FIG. 16), CHUN
File ID that specifies KGROUP_001 is recorded and CP
U21 memorizes this and stores CHUNKGROUP_001 in RAM.
24.

Next, the CPU 21 determines the start time and end time of TITLE_002 (title_start_chun in title_info () in FIG. 16).
k_group_time_stamp and title_end_chunk_group_time_sta
mp) to find out which CHUNK it corresponds to. This is CHU
From the information of NKGROUP, information in which each CHUNK is registered (pres in chunk_arrangement_info () in FIG. 23)
entation_start_cg_time_count and presentation_end_cg_
time_count). In this case, the start time of TITLE_002 is CHU as shown in FIG.
You can see that it is in the middle of NK_0001. In other words, TIT
To play LE_002 from the beginning, use stream file "C
HUNK_0001.MPEG2 "indicates that it is sufficient to start the reproduction.

Next, the CPU 21 checks where the head of TITLE_002 is in the stream. That is, TITLE_
The start time of 002 is calculated as the offset time (time stamp) in the stream.
Next, the reproduction start point immediately before the start time is specified using the feature point information in the CHUNK file. This allows
This means that the offset distance from the beginning of the file at the playback start point has been determined.

Next, the CPU 21 uses the file system operation instruction previously incorporated in the processing program, and uses the optical disk 1 on which “CHUNK_0001.MPEG2” is recorded.
Determine the above physical address and its length. Further, the offset address of the reproduction start point obtained earlier is added to this address, and the address of the reproduction start point of TITLE_002 is finally determined.

Subsequently, the CPU 21 executes the “CHUNK_0001.MPE
The CPU 21 moves the optical head 2 to the reading position based on the address information of “G2”.
In addition, the demodulation / modulation circuit 3 and the ECC circuit 4 are set to the read mode, the switch 5 is switched to the read channel buffer 6, and the position of the optical head 2 is finely adjusted. .
As a result, the content of “CHUNK_0001.MPEG2” is accumulated in the read channel buffer 6.

The data stored in the read channel buffer 6 is output to the decoder 7 and subjected to a decoding process to output a video signal and an audio signal. When the amount of data read, decoded, and displayed from the optical disc 1 becomes equal to the size of “CHUNK_0001.MPEG2”, the CPU 21 shifts to reproduction of TITLE_003. The playback operation of TITLE_003 is similar to the playback operation of TITLE_002.

When the reproduction of the registered title is completed, or when the stop of the reading operation is instructed,
The reading and decoding processing is stopped.

When a new disk is inserted into the optical disk device as the optical disk 1, or when a disk of a different format is inserted, the CPU 2
1, when the disc is inserted, VOLUME.TOC and ALBUM.
An attempt is made to read the STR, but no such file exists on these disks. In such a case, that is, when the VOLUME.TOC and ALBUM.STR cannot be read, the CPU 21 outputs a message and requests an instruction from the user. The user instructs the CPU 21 to eject the optical disc 1 (for example, when the disc is of a different format) or to initialize the optical disc 1 (for example, for a new disc of the same format).
Alternatively, the data is recovered by some method (for example, when the disks are of the same format but the data is destroyed).

An optical disk device 51 shown in FIG. 36 records a video signal (hereinafter, referred to as a compressed video signal) supplied from a digital satellite broadcast or the like and compressed according to the MPEG2 system on a recordable optical disk 71. To reproduce the video signal recorded in the.

The optical disk device 51 is compressed by the MPEG2 system from a first input terminal 52 to which an uncompressed baseband digital video signal (or analog video signal) is input, a receiving device 72 for digital satellite broadcasting or the like. A second input terminal 53 to which the compressed video signal
The digital video signal supplied via the first input terminal 52 as it is, or in the case of an analog signal, is subjected to A / D conversion and then an MPEG encoder 54 for compressing in an MPEG2 system and a second input terminal 53. Circuit for descrambling a digital satellite broadcast video signal supplied via the same, and MPEG for expanding a compressed video signal descrambled by the descrambling circuit 55
A decoder 56 is provided.

The optical disk device 51 is supplied with an uncompressed baseband digital video signal from the first input terminal 52 or the MPEG decoder 56, and detects a characteristic point of this digital video signal (input). If this is an analog video signal, the characteristic point is detected after A / D conversion.) The compressed video signal output from the characteristic point detection circuit 57, the MPEG encoder 54 or the descrambling circuit 55, and the characteristic check A multiplexing circuit 58 for multiplexing the feature point file output from the output circuit 57 and a recording circuit 59 for recording the compressed video signal multiplexed by the multiplexing circuit 58 on the optical disk 71 are provided.

Further, the optical disk device 51 includes a reproducing circuit 60 for reproducing the compressed video signal and the characteristic point file recorded on the optical disk 71, a separating circuit 61 for separating the reproduced video signal and the characteristic point file, and a separating circuit 61 for separating the separated video signal. An MPEG decoder 62 for decoding by the MPEG2 system, and a reproducing circuit 6 based on information of the separated feature point file.
A control circuit 63 for controlling the reproduction of 0 is provided.

[0136] The optical disc device 51 has an operation input section 64 to which an operation is input by the user, and a baseband digital video signal output from the first input terminal 52, the MPEG decoder 56, and the MPEG decoder 62. Is provided as a moving image.

A normal uncompressed digital video signal is supplied to the first input terminal 52 from, for example, a digital video tape recorder or the like. The uncompressed ordinary digital video signal supplied to the first input terminal 52 is image-compressed by the MPEG encoder 54 based on the MPEG2 system, and then supplied to the multiplexing circuit 58. The uncompressed ordinary digital video signal supplied to the first input terminal 52 is output from the feature point detection circuit 57.
Is also supplied.

The second input terminal 53 is supplied with a compressed video signal compressed by the MPEG2 system, for example, from a digital satellite broadcast receiving device 72 or the like. The compressed video signal supplied to the second input terminal 53 is descrambled by a descrambling circuit 55 using a key code or the like. Then, the descrambled compressed video signal is supplied to the multiplexing circuit 58. The descrambled digital video signal is also supplied to an MPEG decoder 56, where it is subjected to decompression processing, and then supplied to a feature point detection circuit 57.

When the uncompressed baseband video signal is supplied, the feature point detection circuit 57 detects feature points from the video signal and generates a feature point file.

Here, the characteristic points of the video signal are head points used when reproducing or editing the video signal, and the like.
For example, a frame at a scene change or a frame at a start or end point of a program. The feature points are
In addition to this, the first picture of a GOP in MPEG, an I picture, or above or below a certain volume (high volume or silence)
Frame. Note that when detecting a feature point using a GOP or audio in MPEG as described above,
Necessary information is supplied to the feature point detection circuit 57.

The feature point file contains information on the correspondence between the above-described feature point types and the recording positions of the feature points on the optical disk 71. The recording position of the characteristic point on the optical disk 71 is, for example, a sector address or the like.

Note that this feature point can be specified by the user. For example, the user may operate the operation input unit 64 to specify a feature point during real-time recording, and at this time, the feature point detection circuit 57 may detect an operation input and generate feature point information. Good.

The characteristic point detection circuit 57 supplies the generated characteristic point file to the multiplexing circuit 58.

The multiplexing circuit 58 includes a descrambling circuit 5
5 or a feature point file is multiplexed with the compressed video signal compressed by the MPEG2 system supplied from the MPEG encoder 54. The compressed video signal in which the feature point file is multiplexed is added to an error correction code by the recording circuit 59 or modulated by a predetermined modulation method, and then recorded on the optical disk 71.

The multiplexing circuit 58 multiplexes the feature point file with the compressed video signal, and simultaneously multiplexes the caption code, audio data, and the like. The multiplexing circuit 58 may multiplex the characteristic point file so as to be recorded in a management information area such as the TOC of the optical disc 71, or may multiplex the characteristic point file into a compressed video signal without using a memory card. Alternatively, the information may be recorded on another recording medium such as a memory built in the optical disk device 51 or the like.

As described above, in the optical disk device 51, for example, a compressed video signal supplied by digital satellite broadcasting or the like is converted into an
1 can be recorded. Also, the optical disk device 51
Then, the feature point of the video signal to be recorded is detected by the feature point detection circuit 57 and recorded as a feature point file together with the compressed video signal. Therefore, the optical disk device 51 can record a video signal without deteriorating the image quality, and can enable random access to the recorded video signal.

On the other hand, the reproducing circuit 60 reproduces the compressed video signal and the characteristic point file recorded on the optical disk 71 by performing demodulation, error correction processing and the like.

The reproduced compressed video signal and the feature point file are separated by the separation circuit 61, respectively. The separated compressed video signal is decoded by the MPEG decoder 62 and supplied to the monitor 65 and the like. The separated feature point file is supplied to the control circuit 63.

The control circuit 63 controls the reproduction circuit 60 based on the information of the acquired feature point file and the operation input information from the operation input section 64. For example, the control circuit 63
Performs random access to the optical disk 71 based on the information on the feature points indicated in the feature point file and the sector address where the feature points are recorded. And
The playback circuit 60 performs, for example, skip playback in which frames of feature points indicated in the feature point file are sequentially played back, head playback to a predetermined scene change frame, and the like.

If the feature point file is recorded in, for example, the TOC of the optical disc 71, the control circuit 63 displays the information indicated in the feature point file on the monitor 65, and the user displays this display content. After the confirmation, the program may be reproduced from the beginning of the predetermined program.

The above-described MPEG decoder 62 is shown as a separate circuit from the MPEG decoder 56 for the sake of convenience, but one circuit may be selectively used for recording and reproduction.

As described above, in the optical disk device 51, the compressed video signal recorded on the optical disk 71 can be reproduced without deteriorating the image quality, and the recorded video signal can be randomly accessed. Can be.

By the way, the optical disk device 51 can generate a new feature point file during reproduction. That is, in the optical disc device 51, the
The output of the MPEG decoder 62 is supplied to a feature point detection circuit 57, and a feature point file is generated from a baseband video signal obtained during the reproduction. The feature point detection circuit 57
The feature point file generated at the time of reproduction is supplied to the control circuit 63 and stored in a memory built therein. The control circuit 63 may control the reproduction of the optical disk 71 based on the feature point file stored separately in the memory.

When a feature point file is generated at the time of reproduction as described above, only a feature point of a reproduced portion of a recorded video signal can be detected. However, for example, if a high-speed MPEG decoder 62 whose processing speed is four times or eight times the reproduction speed is used, the feature point file can be generated before the video signal is pre-read and reproduced. .

The optical disk device 51 multiplexes the feature point file generated at the time of reproduction with a video signal at the end of reproduction or at the time of interruption, and records the multiplexed video signal on the optical disk 71. Further, it may be separately stored in a memory or the like provided in the control circuit 63 of the optical disk device 51.

FIG. 37 shows a process of storing and recording feature point information. First, in step S1, the control circuit 63
It is determined whether or not the input signal is an analog signal. If the input signal is an analog signal, the process proceeds to step S2, where 1 GOP worth of data is
The PEG encoder 54 encodes. The encoded bit stream is supplied to the multiplexing circuit 58 and the recording circuit 5.
9 and is recorded as a file on the optical disk 71. At this time, the control circuit 63 controls the feature point detection circuit 57 to detect the feature points of the video signal input from the terminal 52. Next, proceeding to step S3, the control circuit 63 stores the feature points detected by the feature point detection circuit 57 in step S2 in a built-in memory. Further, in step S4, the control circuit 63 determines whether or not the end of the recording has been instructed by the user. If the end of the recording has not been instructed, the control circuit 63 returns to step S2 and repeatedly executes the subsequent processing. If it is determined in step S4 that the recording operation has been completed, the process proceeds to step S13.

On the other hand, if it is determined in step S1 that the input signal is not an analog signal, step S5
The control circuit 63 determines whether or not the input signal is a video stream encoded by the MPEG2 method. If the video stream is encoded in the MPEG2 format, the process proceeds to step S6, and the control circuit 63
Parse 1 GOP worth of video data. That is, the control circuit 63 controls the MPEG decoder 56 to decode, from the header information included in the bit stream, information necessary as feature point information, such as the starting point, picture type, and length of the GOP of the bit stream. Feature point detection circuit 5
7 detects feature point information from the information decoded by the MPEG decoder 56. The input signal is recorded in a file.

Then, the process proceeds to a step S7, wherein the control circuit 63
Stores the feature point information detected by the feature point detection circuit 57 in a built-in memory. At this time, since the video data that has been input has already been encoded in the MPEG2 system, the MPEG encoder 54 supplies the input bit stream to the multiplexing circuit 58 as it is, and further supplies the data via the recording circuit 59. Then, it is recorded on the optical disc 71.

In step S8, the control circuit 63
It is determined whether or not the end of the recording operation has been instructed. If not, the process returns to step S6, and the subsequent processes are repeatedly executed. If it is determined in step S8 that the end of the recording operation has been instructed, the process proceeds to step S13.

On the other hand, in step S5, the input signal is
If it is determined that the video stream is not a video stream encoded in the MPEG2 format, the process proceeds to step S9, and the control circuit 6
3 determines whether the video signal can be parsed (the structure of the video signal can be detected). If parsing is possible, the process proceeds to step S10, and the control circuit 63 parses one access unit. That is, the control circuit 6
3 controls the MPEG decoder 56 to decode the input video stream (accordingly, the MPEG decoder 56
Has a function of decoding data encoded by a method other than the MPEG2 method), and supplies the header information to the feature point detection circuit 57 to detect feature points. At this time, the input video stream passes through the MPEG encoder 54 as it is, and is recorded as it is in a file on the optical disk 71 via the multiplexing circuit 58 and the recording circuit 59. Further, in step S11, feature point information is stored in a built-in memory. In step S12, the control circuit 63 determines whether or not the end of the recording operation has been instructed. If the end has not been instructed yet, the process returns to step S10 and repeats the subsequent processing. If it is determined in step S12 that the end of the recording operation has been instructed, step S13
Proceed to.

In step S13, the control circuit 63
Supplies the feature point information stored in the built-in memory to the feature point detection circuit 57 to generate a file,
8. Recording is made as a file on the optical disc 1 via the recording circuit 59.

If it is determined in step S9 that parsing cannot be performed, the control circuit 63 terminates the recording operation.

The feature point information will be described in more detail. The purpose of introducing the feature point file is the following two. -Reduce access time during variable-speed playback to achieve faster variable-speed playback.-By not embedding information in the stream, reduce the load during recording. This can be expected to have the following effects.・ Edit MPEG2 video stream with frame accuracy ・ Smoothly switch between two streams during playback (seamless playback)

The characteristic point information is obtained by extracting and arranging necessary information for each small unit of the bit stream. The small unit is determined according to the feature of the bit stream. For example, in the case of an MPEG video stream, one GOP is used, and in the case of audio, one audio frame corresponds. The feature point information in this case is
P, information such as the relative number of bytes from the beginning of the file at the start position of the audio frame and the playback time

The optical disk device 51 temporarily stores the extracted feature point information in a memory, and finally records it on the optical disk 71. The feature information parses the stream even if the file that recorded it is lost.
Can be reconstructed. When there is no feature point information file or when it cannot be created, reproduction is performed without using feature point information. In this case, there is a restriction on reproduction. For example, only normal reproduction from the beginning of a chunk (chunk) may be possible, or a connection may not be natural when switching the chunk (chunk).

The details of the feature point information are shown in FIG. 24 as described above. CHUNK _ %%%%. ABST is a file that records the feature points extracted from the bit stream that constitutes the chunk with the sub-file number %%%%. In this file, the start byte position, length, attributes, and the like are described for each unit constituting a bit stream such as a GOP and an audio frame. GOP information / audio frame information is one CHUNK _ %%%%. ABST for each chunk (sub-file).
It is summarized as.

The file_type_id is configured as shown in FIG. 38, and is an identifier indicating that the file is a file in which feature point information is recorded, and is represented by a character string of 16 characters according to ISO 646.

[0168] The info_type indicates the type of the following stream_info, and as shown in Fig. 39, the type of the stream is specified.

Cognizant_recording_indicator in FIG.
Indicates whether this chunk has been recorded by a recording device having the ability to understand and update CCI (Copy Control Information).

[0170] number_of_programs is TS (Transport St
Ream) represents the number of programs included in the program. To know this number, it is necessary to read PSI (Program Specific Information). For other than TS, this value is 1. numbe
r_of_streams represents the number of streams used in this program, and in the case of TS, a different PID (pack
et identification). TS
For MPEG streams other than, the number of streams with different stream ids is entered here. stream_identif
ier represents a stream id, and in the case of a TS, a PID is used as the stream id. Slot_unit_typ in Fig. 41
e indicates a method of dividing the stream at regular intervals. Each frame, field, etc.
If the index is time, a timestamp value is used.

The slot_time_length indicates a time corresponding to one slot, and is represented by a time stamp value using a 90 kHz counter. number_of_slots represents the number of slots described in the table. number_of_thinne
d_out_slots represents the number of slots to be thinned out, and 0
In the case of, all of the slots indicated by slot_unit_type are recorded in this file. The first slot created for each stream cannot be decimated. The text_block () is an area for storing various texts, and can describe only a text item that is permitted to be used in a file including the text_block ().

Bitstream_attribute () is an MPEG element
ary stream (elementary stream) or other attributes of each video and audio stream. The syntax is as shown in FIG.

The bitstream_attribute_id shown in FIG.
This is an identifier indicating that bitstream_attribute () starts here, and is represented by a character string of 16 characters according to ISO 646. bitstream_attribute_length is bitstream_attr
Indicates the length of the data byte included in ibute () and immediately following the bitstream_attribute_length field. attribute
As shown in FIG. 44, _type indicates the type of the attribute that follows.

[0174] video_attribute () is collected for each video stream. A chunk is a unit in which a stream is continuous, and an attribute can be defined for each unit.

The syntax of video_attribute () is as shown in FIG.

Input_video_source indicates the type of input source, as shown in FIG.

[0177] The video_compression_mode represents a video encoding method such as an MPEG1 video, an MPEG2 video, or a DV, as shown in FIG.

Picture_rate is 1 as shown in FIG.
It indicates how long the picture has been sampled, and indicates the shortest time cycle of the picture regardless of picture_scan_type.

[0179] As shown in Fig. 49, picture_scan_type indicates whether one picture is recorded line-sequentially (progressively) or interlaced.
The display method is an implementation problem.

Vertical_lines is, as shown in FIG.
Indicates the number of scanning lines.

Horizontal_active_pixels represents the number of active pixels in the horizontal direction. Aspect_ratio represents an aspect ratio as shown in FIG.

The pixel_ratio represents the squareness of the pixel (1: 1 or 1: 1.125) as shown in FIG.

The CC_existence is, as shown in FIG.
osed Caption (closed caption).

The recording_mode is, as shown in FIG.
VDR recording mode (SP (Standard Play) or LP (Long Pl
ay)).

[0185] copyright_information represents copyright information.

[0186] audio_attribute () is an area for recording an attribute of an audio stream, in which a fixed attribute is arranged in a chunk for each stream ID (stream ID). If a plurality of audio streams with the same stream ID are recorded at different times, they must all have the same attribute. Each channel in one audio stream has the same coding mode, quantization bit, and sampling frequency.

The syntax of audio_attribute () is as shown in FIG.

[0188] number_of_audio_streams is the chunk
It represents the total number of streams that can be regarded as audio streams recorded in (chunk), and means the number of audio streams with different stream ids. chunk
It does not depend on where (chunk) starts (see the feature point file for where to start).
stream_id represents the stream id of the target audio stream. sub_stream_id represents an id that assists in determining a target audio stream.
language_code represents the language code of this stream and is written according to ISO639-2. input_source is shown in Figure 5
As shown in FIG. 6, the input source of this stream is represented.
If unknown, it is written as "0000b".

[0189] audio_coding_mode represents the coding mode of this audio stream, as shown in FIG.

Bitrate indicates whether it is a fixed or variable bitrate as shown in FIG.

As shown in FIG. 59, q_bit represents the number of quantization bits (24, 20, 16, 12, etc.).

Fs represents the sampling frequency of this audio stream, as shown in FIG.

As shown in FIG. 61, emphasis indicates an emphasis flag, and is valid when the stream is LPCM.

Number_of_channels is the number of channels (1
(mono) to 8). status_of_this_channel indicates the status of the channel and indicates whether there are any remaining channels to be used for post-recording, such as indicating a vacant channel. channel_assignment indicates which channel is assigned to which speaker (L, R, Center (center), Rear (rear) L, R
ear (rear) R ,,,), indicates whether the stream is valid for LPCM. Dynamic_range_control
Represents Dynamic range control. karaoke () represents karaoke-related data.

The slot_info () divides a stream into units specified by slot_type, and divides the stream into smaller units (slot).
The feature of the stream is extracted for each (slot). slot_info () is used depending on the type of stream.

The syntax of slot_info () is as shown in FIG.

As shown in FIG. 63, slot_info_id is an identifier indicating that slot_info () starts here.
Expressed as a 16-character string according to SO 646. slot_inf
o_length is included in slot_info () and slot_info_length
Represents the length of the data byte immediately following the field.

The syntax of slot_info_for_one_GOP () is as shown in FIG.

[0199] slot_info_for_one_GOP () is obtained by extracting features of an MPEG video stream, and the basic slot unit is 1 GOP. slot_info_for_one_GOP
() Is repeated by the number of GOPs present in the stream. The slot_start_point used below indicates the head position of the slot and is byte aligned. The first byte of every GOP header in the stream must be slot_start_point. In addition, the first byte of the picture header of the I-picture
It may be ot_start_point.

[0200] slot_length is the corresponding slot_start_poin.
Represents the value of the length from t to the next slot_start_point in bytes, and the first or last slot of the stream is represented by the length from the beginning and end of the file, respectively. (in case of "info_type == MPEG1_System_stream") sequence_header_start_offset is the target slot
Bit position before _start_point, slot_s
Points to the first byte of the Sequence header closest to tart_point. Its value is slot_start_p
Expressed as the absolute value of the number of bytes relative to oint.

The packet_start_offset is the sequence_header
Indicates the first byte of a packet header (packet header) of the packet including the byte position indicated by _start_offset. Its value is expressed as the absolute value of the number of bytes relative to slot_start_point. pack_start_offset is
Points to the first byte of the pack header of the pack including the byte position indicated by nce_header_start_offset. Its value is expressed as the absolute value of the number of bytes relative to slot_start_point. (in case of "info_type == MPEG2_System_PS") sequence_header_start_offset is the target slot
Bit position before _start_point, slot_s
Points to the first byte of the sequence header closest to tart_point. Its value is expressed as the absolute value of the number of bytes relative to slot_start_point.

PES_packet_start_offset is sequence_he
Points to the first byte of the packet header of the PES packet including the byte position indicated by ader_start_offset.
Its value is expressed as the absolute value of the number of bytes relative to slot_start_point. pack_start_offset is sequence_header
Points to the first byte of the pack header of the pack containing the byte position indicated by _start_offset. Its value is sl
Expressed as the absolute value of the number of bytes relative to ot_start_point. (in case of "info_type == MPEG2_System_TS") sequence_header_start_offset is the target slot
Bit position before _start_point, slot_s
Points to the first byte of the sequence header closest to tart_point. Its value is expressed as the absolute value of the number of bytes relative to slot_start_point.

[0203] TS_packet_start_offset is sequence_hea
Contains the byte position pointed to by der_start_offset
Indicates the first byte of the packet header of the TS packet. The value is the absolute value of the relative number of bytes from the first byte of the packet header of the TS packet containing slot_start_point to 18
Divided by 8. PES_packet_start_offset is TS
Points to the first byte of the PES packet containing the byte position indicated by _packet_start_offset. Its value is slot_
Expressed as the absolute value of the number of bytes relative to start_point. T
S_packet_start_offset2 is PES_packet_start_offset
Indicates the first byte of the TS packet containing the byte position indicated by. Its value includes slot_start_point
The absolute value of the relative number of bytes from the first byte of the packet header of the TS packet is divided by 188. (in case of "info_type == MPEG2_System_PES")

[0204] The sequence_header_start_offset is located before the target slot_start_point as a bit position, and indicates the first byte of the sequence header closest to the slot_start_point. Its value is expressed as the absolute value of the number of bytes relative to slot_start_point. PES_packet_start
_offset indicates the first byte of the packet header of the PES packet including the byte position indicated by sequence_header_start_offset. Its value is expressed as the absolute value of the number of bytes relative to slot_start_point. GOPH_existence
_flag is a flag indicating whether or not the header immediately before slot_start_point is a GOP header.
Valid only when rt_point is a picture header. fi
As shown in FIG. 65, rst_presented_picture_structure is a pictur of a picture to be displayed first in the corresponding slot.
e_structure.

Copy_closed_GOP represents a copy of the value of the closed (closed) GOP flag of the GOP header corresponding to the slot. copy_broken_link is the broken link of the GOP header corresponding to the slot
Represents a copy of the flag value. time_stamp_of_first_pict
ure represents a time stamp of a picture first displayed in the target slot, or something similar to time information for AV synchronization. GOP_status indicates the GOP status and is composed of a flag indicating whether or not an edit point is included. pict
ure_count_type represents a picture count type (frame or field) as shown in FIG. 3-2
Due to the problems of pull-down and top or bottom field first, errors may occur when pictures are counted in frame units, so that counting in field units is enabled.

[0206] number_of_pictures represents the number of pictures contained in the slot, and is a value counted in units defined by picture_count_type. encode_info () represents an area for recording information from an encoder that has encoded this stream. buffer_occupancy () represents information about the buffer occupancy. camera_info () represents shooting information (camera shake correction information, camera aperture, shutter speed, brightness, etc.) when the material is shot by a video camera. reserved indicates an extended area.

[0207] Synta of slot_info_for_one_audio_frame ()
x is as shown in FIG.

The information of the MPEG audio stream is AAU (Au
For each dio access unit (audio frame), write in the order in which they are arranged in the bit stream file. AAU_storage_
length indicates the difference between the start address of the PES packet that includes the start of the target AAU and the start of the PES packet that includes the start of the next AAU, and indicates the position of the packet where the start of the AAU is recorded. Adds this value. AAU_
start_byte_position is the PES that contains the beginning of the target AAU
Indicates the length from the beginning of the packet to the first byte of AAU. flags represents various flags. encode_info () represents an area for recording information from an encoder that has encoded this stream. camera_info () is the information at the time of shooting when the material was shot with a video camera (image stabilization information, camera aperture, shutter speed, brightness, whether or not time-lapse shooting was performed, AE MODE, WB MODE, PLANNI
NG SPEED, SHUTTER, etc.).

[0209] Syntax of slot_info_for_one_time_slot ()
Is as shown in FIG.

In the above, the case where the present invention is applied to an optical disk device has been described as an example. However, the present invention can also be applied to a case where information is recorded or reproduced on another recording medium.

[0211] Note that a providing medium for providing a user with a computer program for performing the above-described processing includes:
In addition to recording media such as magnetic disks, CD-ROMs, and solid-state memories, communication media such as networks and satellites can be used.

[0212]

According to the recording apparatus according to the first aspect, the recording method according to the fifth aspect, and the providing medium according to the sixth aspect, for each file, a video or audio signal included in the file is recorded. Since the feature point information is recorded on the recording medium, the reproduction of the video or audio signal can be controlled in file units.

According to the reproducing apparatus described in claim 7, the reproducing method described in claim 8, and the providing medium described in claim 9, for each file, based on the feature point information recorded in the recording medium. Since the reproduction of the file is controlled, the file can be easily managed.

[0214] The recording apparatus according to claim 10, wherein
According to the recording method described in (1) and the providing medium described in (12), the characteristic point information of the video signal is detected and recorded on the recording medium together with the video signal. Can be recorded without
Further, random access can be made to the recorded video signal. In addition, recording and reproduction can be performed in the same manner regardless of whether the video signal is compressed or not, so that the cost of the recording and reproduction apparatus can be suppressed.

According to the recording / reproducing apparatus of claim 13, the recording / reproducing method of claim 14, and the providing medium of claim 15, a file and characteristic point information of each file are recorded on a recording medium. , And the reproduction of the file is controlled in accordance with the feature point information reproduced therefrom, so that it is possible to realize a system that can easily manage the file.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating the structure of a directory.

FIG. 2 is a diagram illustrating VOLUME.TOC.

FIG. 3 is a diagram illustrating volume_information ().

FIG. 4 is a diagram illustrating volume_attribute ().

FIG. 5 is a diagram illustrating resume ().

FIG. 6 is a diagram illustrating volume_rating ().

FIG. 7 is a diagram illustrating write_protect ().

FIG. 8 is a diagram for explaining play_protect ().

FIG. 9 is a diagram for explaining recording_timer ().

FIG. 10 is a diagram illustrating text_block ().

FIG. 11 is a diagram illustrating language_set ().

FIG. 12 is a diagram illustrating text_item ().

FIG. 13 is a diagram for explaining ALBUM.STR.

FIG. 14 is a diagram for explaining album ().

FIG. 15 is a diagram illustrating TITLE _ ###. VDR.

FIG. 16 is a diagram for explaining title_info ().

FIG. 17 is a view for explaining PROGRAM _ $$$. PGI.

FIG. 18 is a diagram illustrating program ().

FIG. 19 is a diagram illustrating play_list ().

FIG. 20 is a diagram for describing play_item ().

FIG. 21 is a diagram for explaining CHUNKGROUP _ ###. CGIT.

FIG. 22 is a diagram for describing chunk_connection_info ().

FIG. 23 is a view for explaining chunk_arrangement_info ().

FIG. 24 is a diagram for explaining CHUNK _ %%%%. ABST.

FIG. 25 is a block diagram illustrating a configuration example of an optical disc device to which the present invention has been applied.

FIG. 26 is a diagram illustrating the structure of a directory.

FIG. 27 is a diagram illustrating a logical structure of a directory.

FIG. 28 is a diagram illustrating offset.

FIG. 29 is a diagram illustrating the structure of a directory.

FIG. 30 is a diagram illustrating the structure of a directory.

FIG. 31 is a diagram illustrating a logical structure of a directory.

FIG. 32 is a diagram illustrating the structure of a directory.

FIG. 33 is a diagram illustrating the structure of a directory.

FIG. 34 is a diagram illustrating a logical structure of a directory.

FIG. 35 is a diagram illustrating a logical structure of a directory.

FIG. 36 is a block diagram illustrating another configuration example of the optical disc device of the present invention.

FIG. 37 is a flowchart illustrating a process of storing and recording feature point information.

FIG. 38 is a view for explaining field_type_id.

FIG. 39 is a view for explaining info_type.

FIG. 40 is a diagram for describing cognizant_recording_indicator.

FIG. 41 is a view for explaining slot_unit_type.

Fig. 42 is a diagram for describing bitstream_attribute ().

Fig. 43 is a diagram for describing bitstream_attribute_id.

FIG. 44 is a view for explaining attribute_type.

[Fig. 45] Fig. 45 is a diagram for describing video_attribute ().

FIG. 46 is a diagram for describing input_video_source.

FIG. 47 is a view for explaining video_compression_mode.

FIG. 48 is a view for explaining picture_rate.

Fig. 49 is a diagram for describing picture_scan_type.

FIG. 50 is a view for explaining vertical_lines.

FIG. 51 is a diagram illustrating aspect_ratio.

FIG. 52 is a diagram for describing pixel_ratio.

FIG. 53 is a view for explaining CC_existence.

Fig. 54 is a diagram for describing recording_mode.

[Fig. 55] Fig. 55 is a diagram illustrating the syntax of audio_attribute ().

FIG. 56 is a diagram for describing input_source.

Fig. 57 is a diagram for describing audio_coding_mode.

FIG. 58 is a diagram illustrating bitrate.

Fig. 59 is a diagram for describing q_bit.

FIG. 60 is a diagram illustrating fs.

FIG. 61 is a diagram for explaining emphasis.

Fig. 62 is a diagram for describing the syntax of slot_info ().

Fig. 63 is a diagram for describing slot_info_id.

Fig. 64 is a diagram for describing the syntax of slot_info_for_one_GOP ().

Fig. 65 is a diagram for describing first_presented_picture_structure.

Fig. 66 is a diagram for describing picture_count_type.

Fig. 67 is a diagram for describing the syntax of slot_info_for_one_audio_frame ().

Fig. 68 is a diagram for describing the syntax of slot_info_for_one_time_slot ().

[Explanation of symbols]

Reference Signs List 1 optical disk, 2 optical head, 3 RF and demodulation / modulation circuit, 4 ECC circuit, 6 buffer for read channel, 7 decoder, 8 synthesis circuit, 9
OSD control circuit, 10 encoder, 11 buffer for write channel, 12 address detection circuit, 1
3 system controller, 14 input units, 21 CP
U, 22 ROM, 23, 24 RAM, 51 optical disk device, 52 first input terminal, 53 second input terminal, 54 MPEG encoder, 55 descramble circuit, 56 MPEG decoder, 57 feature point detection circuit, 58 multiplexing Circuit, 59 recording circuit, 60
Playback circuit, 61 separation circuit, 62 MPEG decoder,
63 control circuit, 64 operation input section, 65 monitor

 ──────────────────────────────────────────────────続 き Continued on the front page (31) Priority claim number Japanese Patent Application No. 10-2639 (32) Priority date Hei 10 (1998) January 8 (33) Priority claim country Japan (JP) (31) Priority Claim number Japanese Patent Application No. 10-46861 (32) Priority Date Hei 10 (1998) February 27 (33) Priority claiming country Japan (JP) (31) Priority claim number Japanese Patent Application No. 10-46862 (32) Priority Japan, February 10, 1998 (33) Priority country Japan (JP)

Claims (15)

[Claims] 1. File creation means for creating a file containing a video or audio signal, and for each file created by the file creation means, feature point information of the video or audio signal contained in the file is created. A recording apparatus comprising: feature point information creating means; and recording means for recording the file and feature point information on a recording medium. 2. The recording apparatus according to claim 1, wherein the feature point information is cueing information, pointer information, slot_info (), or video_attribute. 3. The video_attribute has an aspect_rati
3. The method according to claim 2, further comprising: o or display_mode.
The recording device according to claim 1. 4. The recording apparatus according to claim 1, wherein the recording unit records the feature point information collectively on the recording medium. 5. A file creation step for creating a file including a video or audio signal, and for each file created in the file creation step, feature point information of the video or audio signal included in the file is created. A recording method comprising: a feature point information creating step; and a recording step of recording the file and the feature point information on a recording medium. 6. A file creating step for creating a file including a video or audio signal, and for each file created in the file creating step, feature point information of the video or audio signal included in the file is created. A providing medium for providing a computer-readable program that causes an information processing apparatus to execute a process including a feature point information creating step and a recording step of recording the file and the feature point information on a recording medium. 7. File reproducing means for reproducing a file containing a video or audio signal recorded on a recording medium, and for each file reproduced by the file reproducing means, the file recorded on the recording medium Characteristic point information reproducing means for reproducing characteristic point information of the video or audio signal included in the video signal; and reproduction control means for controlling reproduction of the file based on the characteristic point information reproduced by the characteristic point information reproducing means. A playback device comprising: 8. A file reproducing step of reproducing a file containing a video or audio signal recorded on a recording medium, and for each file reproduced in the file reproducing step, the file recorded on the recording medium A feature point information playback step of playing back the feature point information of the video or audio signal included in the video signal; and a playback control step of controlling playback of the file based on the feature point information played back in the feature point information playback step. And a reproducing method comprising: 9. A file reproducing step of reproducing a file including a video or audio signal recorded on a recording medium, and for each file reproduced in the file reproducing step, the file recorded on the recording medium A feature point information playback step of playing back the feature point information of the video or audio signal included in the video signal; and a playback control step of controlling playback of the file based on the feature point information played back in the feature point information playback step. And a computer-readable program for causing an information processing apparatus to execute a process including the following. 10. An input unit to which an input signal including at least a video signal is input; a feature point information detecting unit configured to detect feature point information of the video signal based on a signal included in the input signal; A recording apparatus comprising: a video signal recording unit that records at least a video signal of a signal included in an input signal on a recording medium; and a feature point information writing unit that writes the feature point information on a recording medium. 11. An input step of inputting at least an input signal including a video signal; a feature point information detecting step of detecting feature point information of the video signal based on a signal included in the input signal; A recording method, comprising: a video signal recording step of recording at least a video signal among signals included in a signal on a recording medium; and a feature point information writing step of writing the feature point information on a recording medium. 12. An input step of inputting an input signal including at least a video signal; a feature point information detecting step of detecting feature point information of the video signal based on a signal included in the input signal; A computer that causes an information processing apparatus to execute a process including a video signal recording step of recording at least a video signal on a recording medium among signals included in the signal, and a feature point information writing step of writing the feature point information on a recording medium A providing medium for providing a readable program. 13. A file creating means for creating a file containing a video or audio signal, and for each file created by the file creating means, feature point information of the video or audio signal contained in the file is created. Feature point information creating means; recording means for recording the file and the feature point information on a recording medium; file reproducing means for reproducing a file containing a video or audio signal recorded on the recording medium; For each file reproduced by the means, characteristic point information reproducing means for reproducing characteristic point information of the video or audio signal contained in the file recorded on the recording medium; and reproduction by the characteristic point information reproducing means. A playback system for controlling playback of the file based on the extracted feature point information. Recording and reproducing apparatus, characterized in that it comprises a means. 14. A file creation step for creating a file including a video or audio signal, and for each file created in the file creation step, feature point information of the video or audio signal included in the file is created. A feature point information creating step; a recording step of recording the file and the feature point information on a recording medium; a file reproducing step of reproducing a file including a video or audio signal recorded on the recording medium; For each file reproduced in the step, a characteristic point information reproducing step of reproducing characteristic point information of the video or audio signal included in the file recorded on the recording medium; and reproducing in the characteristic point information reproducing step. Based on the obtained feature point information, Reproducing method characterized by comprising a playback control step of controlling the raw. 15. A file creating step for creating a file including a video or audio signal, and for each file created in the file creating step, feature point information of the video or audio signal included in the file is created. A feature point information creating step; a recording step of recording the file and the feature point information on a recording medium; a file reproducing step of reproducing a file including a video or audio signal recorded on the recording medium; For each file reproduced in the step, a characteristic point information reproducing step of reproducing characteristic point information of the video or audio signal included in the file recorded on the recording medium; and reproducing in the characteristic point information reproducing step. Based on the obtained feature point information, Providing medium characterized by providing a reproduction control step and can read a computer to be executed by the information processing apparatus a process comprising a program for controlling the raw.