JP2003274339A - Device, method, and medium for information storage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve at the same time both problems of copyright, etc., when file information of a BS digital broadcast, etc., is stored and problems of an access time when the stored information is reproduced. <P>SOLUTION: A stored data file comprises a file identifier, time stamp information, link information, and entity information. The 'file identifier' is set to 'entity' when file data are stored as entity information and to 'link' when it is specified as a pointer on a stream. When the 'file identifier' is 'entity', the data of the file are stored in the 'entity information', but when the 'file identifier' is 'link', link information specifying the file information as the pointer in the stream is stored in 'link information'. When of them the 'file identifier' is set to depends upon whether the data are allowed to be stored as the entity information of the file. The file which is thus constituted is stored in a storage means. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information storage device, an information storage method, and a storage medium, and more particularly, video information and audio information such as digital broadcasting and sub-information such as weather forecast and competition progress are transmitted in a multiplexed manner. It is suitable for use in a system.

[0002]

2. Description of the Related Art Information transmitted by BS digital broadcasting includes, in addition to program information (video, audio), sub-information such as performers of the program, the progress of the competition, and weather forecasts unrelated to the program. ing. The sub information is multiplexed as a data file on the program information (AV file). That is, the TS packet stream is formed by inserting the data packet forming the data file between the video packet and the audio packet forming the AV file at a predetermined timing.

The receiving system receiving the TS packet stream receives the TS packet stream as a TS.
The video signal and the audio signal are generated by separating the video packet and the audio packet from the TS packet stream. In addition, a data packet is extracted from the TS packet stream to generate a video signal. The video signal is mixed with the video signal generated from the video packet. As a result, a composite image in which a sub-image such as a weather forecast is superimposed on the TV image of the program is displayed on the TV screen.

In such BS digital broadcasting, the file format and the like at the time of information transmission are defined by standards. This is because in order for the receiving system side to smoothly receive and reproduce the BS digital broadcast, it is necessary to make the format of the broadcast signal common. However, the file format and the like for storing the broadcast signal in the storage device after receiving the broadcast signal are not particularly specified. Therefore, at present, it is up to the design of the receiving system which file format to store the received information in the storage device.

[0005]

However, with the widespread use of BS digital broadcasting, some kind of regulation is required for information storage on the receiving system side. In particular, the data packet forming the sub-information may include information such as the profile of the performer and a still image. Therefore, this is TS
If it is taken out from the packet stream and stored as a separate file, it may cause a problem from the viewpoint of copyright.

On the other hand, if the method of accumulating the TS bucket stream as it is is adopted, the problem of the copyright and the like is
It can be avoided under certain conditions. In such a case, the data file can be constructed by pointing the data packet position in the TS packet stream with a pointer.

However, if such a method of pointing with a pointer is adopted, it is necessary to access the data packet when reproducing the data file, and the reproduction output of the file is delayed accordingly. On the other hand, all data packets are not uniformly prohibited from being stored as a file, and for example, data such as weather forecast may be allowed to be stored as a file.

Therefore, the present invention defines the file format at the time of storage on the receiving system side, and in particular, by adopting a file format that can be applied to both whether it can be stored as a file, the problem of the above copyright and the like. It is an object of the present invention to provide an information storage device, an information storage method, and a storage medium capable of simultaneously solving the problem of access time during reproduction.

[0009]

In view of the above problems, the present invention has the following features.

According to the invention of claim 1, there is provided an information storage device comprising a file forming means for forming a predetermined file from an information stream and a storing means for storing the file information formed by the file forming means. File configuration means includes file identification information for identifying the type of the file, time stamp information for defining start time and end time on the reproduction time axis, and link information for defining a pointer to the information stream. The file is configured such that the file can be stored separately from the entity information of the file extracted from the information stream.

According to a second aspect of the present invention, the information storage device according to the first aspect further has a discriminating means for discriminating whether or not the entity information can be extracted from the information stream and stored in the file. If the determining means determines that the entity information can be stored in the file, it stores the information for displaying that the file includes the entity information as the file identification information, and at the same time, from the information stream. Extract the entity information and store it in the file,
When the determination unit determines that the entity information cannot be stored in the file, the information for displaying that the file includes the link information is stored as the file identification information, and the pointer for the information stream is defined. The link information for doing so is stored in the file.

According to a third aspect of the present invention, in the information storage device according to the second aspect, when the determining means determines that the entity information can be stored in a file, the link information is stored in the file. The feature is that it is not performed.

According to a fourth aspect of the present invention, in the information storage device according to the second aspect, when the determination means determines that the entity information cannot be stored in the file, the entity information is stored in the file. It is characterized by not being.

According to a fifth aspect of the present invention, there is provided an information storage method for storing a file, which constitutes a predetermined file from the information stream, and storing the file information in the storage means.
The structure of the file includes file identification information for identifying the type of the file, time stamp information for defining start time and end time on the reproduction time axis, and link information for defining a pointer to the information stream. And the entity information of the file extracted from the information stream are formatted so that they can be stored separately.

The invention according to claim 6 is the information storing method according to claim 5, which has a determining step of extracting the entity information from the information stream and determining whether or not it can be stored in the file. When the determining step determines that the entity information can be stored in the file, the information for displaying that the file includes the entity information is stored as the file identification information, and the entity is extracted from the information stream. Extract the information and store it in the file,
When the determination unit determines that the entity information cannot be stored in the file, the information for displaying that the file includes the link information is stored as the file identification information, and the pointer for the information stream is defined. The link information for doing so is stored in the file.

According to a seventh aspect of the present invention, in the information storage method according to the sixth aspect, when the determination means determines that the entity information can be stored in a file, the link information is stored in the file. The feature is that it is not performed.

According to an eighth aspect of the present invention, in the information storage method according to the sixth aspect, when the determination step determines that the entity information cannot be stored in the file, the entity information is stored in the file. It is characterized by not being.

According to the invention of claim 9, file identification information for identifying a file type, time stamp information for defining a start time and an end time on a reproduction time axis, and a pointer for the information stream are specified. The storage medium is characterized in that the file is stored in such a state that the link information and the entity information of the file extracted from the information stream can be stored separately.

According to a tenth aspect of the present invention, file identification information for identifying a file type, time stamp information for defining a start time and an end time on a reproduction time axis, and a pointer for the information stream are specified. Is a storage medium that stores a control program that controls so that the link information and the entity information of the file extracted from the information stream can be stored separately.

It is preferable that information for identifying whether the file can be stored in the file is added to the information stream, and the discriminating means stores the file in the file as substantive information based on the information. Determine if it is possible. It should be noted that adding information for identifying whether or not a file can be stored to an information stream in this manner newly defines the format of a transmission file in consideration of information storage, and is also inventive. . Also, preferably, the time stamp information is included in the information stream.

The features of the present invention will be more apparent from the following description of the embodiments.

The "file configuration means" and the "discrimination means" in the claims correspond to the system controller 20 in the embodiment. The “accumulation means” in the claims corresponds to the accumulation device 17 in the embodiment. Further, the "file configuration" and the "determination step" in the claims refer to the system controller 2 in the embodiment.
0 according to the control program in the program memory 21.

However, the following embodiment is merely one embodiment of the present invention, and the meanings of the terms of the present invention and each constituent element are limited to those described in the following embodiment. Not something.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

A receiver for digital satellite broadcasting having a storage function will be described with reference to FIG. Receiver 100
Is an antenna 1, a tuner 2, and a transmission line decoding circuit 3
A TS separation / selection circuit 4, a selector 5, an AV decoder 6, a video processing circuit 7, a mixer 8, a video output circuit 9, a CRT 10, an audio processing circuit 11, and an audio output circuit 12. Speaker 13 and remote control transmitter 14
, Remote control receiver 15, buffer memory 16, storage device 17, and boot ROM (Read Only Mey).
memory 18 and work RAM (Random Ac)
cess Memory) 19, a system controller 20, and a program memory 21.

The antenna 1 receives a digitally modulated signal. The tuner 2 selects a channel selected by the user according to an instruction from the system controller 20, and extracts the signal of the selected channel from the signal received by the antenna 1. The transmission path decoding circuit 3 uses the signals extracted by the tuner 2 as video data (video packets) and audio data (audio packets), and service data (data packets) broadcast as a data broadcasting service.
Then, the control data (control packet) for controlling these data is decoded and output to the TS separation / selection circuit 4.

As will be described later, the control packet includes a file storability flag indicating whether the data of each data file formed by the data packet can be stored in the file as substantive information, and each data on the reproduction time axis. It includes time stamp information that defines the reproduction start time and reproduction end time of the file.

When the TS separation / selection circuit 4 does not store the received information, it outputs the video packet and the audio packet to the selector 5 and outputs the data packet of the data broadcast to the system controller 20. Further, the TS separation / selection circuit 4 outputs a TS packet stream including video packets and audio packets, data packets, and control packets to the system controller 20 when accumulating received information.

The selector 5 receives the video packets and audio packets input from the TS separation / selection circuit 4,
Alternatively, the TS packet stream supplied from the buffer memory 16 is output to the AV decoder 6.

The AV decoder 6 separates the input video packet and audio packet into video data and audio data, outputs the separated video data to the video processing circuit 7, and outputs the audio data to the audio processing circuit 11. To do. Also, video data and audio data are extracted and separated from the input TS packet stream, the extracted and separated video data is output to the video processing circuit 7, and the audio data is output to the audio processing circuit 11.

The video processing circuit 7 reproduces the video data and outputs it to the mixer 8. The mixer 8 is a video processing circuit 7
The video data reproduced by the above and the data packet of the data broadcast from the data display circuit 22 are combined and output to the video output circuit 9. The video output circuit 9 supplies screen information obtained by synthesizing the video data from the mixer 8 and the data packet of the data broadcast to the CRT 10. The CRT 10 displays such information on the screen and gives it to the user as visual information.

The audio processing circuit 11 reproduces the audio data from the AV decoder 6 and outputs it to the audio output circuit 12.
The audio output circuit 12 outputs the audio data reproduced by the audio processing circuit 11 to the speaker 13. Speaker 13
Outputs audio data to the outside.

The remote control transmitter 14 receives an instruction from the user and transmits the received instruction to the remote control receiver 15. The remote control receiver 15 receives an instruction from the remote control transmitter 14 and outputs the received instruction to the system controller 20.

The buffer memory 16 writes the TS packet stream supplied from the system controller 20 in the storage device 17. Further, the buffer memory 16 gives the TS packet stream read from the storage device 17 to the selector 5.

The storage device 17 records data at a high density and is a randomly accessible hard disk (HD
D). Then, the storage device 17 stores the TS packet stream from the buffer memory 16 as it is. In addition, the data file formatted by the system controller 20 is stored for each file. Incidentally, such a storage device is a DVD-
The data may be stored in a removable high-capacity recording medium such as a RAM.

The boot ROM 18 is composed of a flash memory and stores data for initializing each unit of the receiver 100. In FIG. 1, the boot ROM 18
Can interact with the system controller 20. Data for initializing each unit of the receiver 100 is received by the antenna 1, the tuner 2, the transmission path decoding circuit 3, and the TS. Separation / selection circuit 4
This is because the data can be rewritten by the data input to the system controller 20 via.

The work RAM 19 is a work memory when the system controller 20 operates. When the system controller 20 forms a data file from the TS packet stream and stores the data file in the storage device 17,
A data packet is extracted from the S packet stream and stored in the work RAM 19. Further, the link information (detailed later) generated at this time is stored in the work RAM 19.

The system controller 20 processes the packet from the TS separation / selection circuit according to the control program in the program memory 21. When information is not stored in the storage device 17, the system controller 20
/ Processes the data packet from the separation / selection circuit 4 and supplies it to the data display circuit 22.

When the information is stored in the storage device 17, the system controller 20 supplies the TS packet stream from the TS / separation / selection circuit 4 to the buffer memory 17 as it is, and the data file relating to the data packet has a format described later. And is supplied to the storage device 17.

The program memory 21 stores a control program for controlling the system controller 20. The data display circuit 22 is the system controller 20.
The data packet of the data broadcast input from the CRT1
The display position when displaying 0 is designated to the mixer 8, and the data of the data packet is output to the mixer 8.

Next, the control operation of the system controller 20 when storing the received information in the storage device 17 will be described with reference to FIG.

When storing the received information, first, the TS packet stream is supplied from the TS / separation / selection circuit 4 (step S101). In response to the supply, the system controller 102 extracts the control packet in the TS packet stream and acquires the file storage availability flag and the time stamp information included in the control packet (step S102). Then, by referring to the file storage availability flag, it is determined whether or not the data file can be stored in the file as entity information and stored (step S103).

When it is determined that the substantive information can be stored, the system controller 102 determines that the TS
The data packet of the data file is extracted from the packet stream (step S104). Further, if it is determined by this determination that the data packet cannot be stored as the entity information, link information for specifying the position of the data packet forming the data file on the TS packet stream as a pointer is generated (S105).

After that, the system controller 102
Is the data of the data packet extracted in step S104 or the link information generated in step S105,
Store it in a file according to the format described later. At the same time, the time stamp information and the identifier of the file are stored in the file to generate an accumulated data file (step S106). The accumulated data file is sent from the system controller 102 to the accumulation device and accumulated in the HDD (step S10).
7). Further, when the generation of the accumulated data file and the accumulation in the accumulation device 17 are completed for all the data files, the system controller 102 supplies the TS packet stream to the buffer memory 16 (step S1).
08). The buffer memory 16 receives the supply,
The TS packet stream is stored in the storage device 17.

Incidentally, the above steps S103 to S107.
Is performed for all data files stored in the storage device 17. The accumulation process may be performed for all the data files existing in the TS packet stream, or may be performed only for the data file designated by the user by the remote control transmitter 14.

FIG. 3 shows the relationship between the TS packet stream and each information. In the figure, C is a control packet, V is a video packet, A is an audio packet, D1 is a data packet of data file 1, and D2 is a data packet of data file 2.

As shown in the figure, the control packet includes a file storage availability flag indicating whether or not it can be stored as a substantive information in another file, and a start time stamp defining the reproduction start time of the data file. Information and end time stamp information defining the reproduction end time of the data file are stored separately for each data file.

However, this is merely a conceptual representation of control information, and is not actually stored as a table in this way, but a field in various types of control packets, or , A combination of multiple fields. Further, the time stamp information may not exist in the field of the control packet. In this case, the system side calculates the time stamp information by calculating the start time of the data packet corresponding to the predetermined file and the end time when the data packet no longer exists (switched to another file).

The data of the data file 1 is constructed by collecting the data stored in the data packet D1. If the file storage availability flag allows storage as substantive data, the data in the data packet D1 is collected and stored in the storage file.
Further, if the storage as entity data is prohibited, the link information (head / final pointer) is generated for the data file as described above.

In the figure, since the file storage availability flag of the data file D1 prohibits storage as actual data, link information is generated. here,
As the link information, the stream section including the data packet D1 of the data file D1 is set to the head pointer (m1
1) and the final pointer (m12).

The specified stream section includes the video packet V and the audio packet A in addition to the data packet D1. Further, normally, the stream section including the data packet D1 is repeatedly present in the TS packet stream a plurality of times, but the stream section specified by the link information is the stream section that first appears on the TS packet stream.

FIG. 4 shows the relationship between the reproduction section of each file and the stream section of the data packet 1. In the figure, a video file composed of video packets and an audio file composed of audio packets are collectively shown as an AV file. D file 1 and D file 2 are data file 1
And the data file 2.

The AV file is reproduced from the timing T on the reproduction time axis. The data file 1 is played back from T + t1 defined by the start time stamp t1, and is played back at T + t5 defined by the end time stamp t5. Also, data file 2
Is T + t defined by the start timestamp t2
The reproduction is started from 2, and the reproduction is ended at T + t4 defined by the end time stamp t4.

On the TS packet stream, the stream section of the data packet D1 has a start time T + t.
It appears repeatedly (stream sections S1 to S5) from 1 to the end time T + t5. This is so that even when the user watches the channel in the middle of the period from T to Tt5, the video of the data file 1 can be always watched.

When the user starts accumulating the reception information of the channel from the beginning of the AV file, the link information specifies the first stream section S1 among the stream sections S1 to S5. Further, when the user starts to accumulate the reception information of the channel in the middle of the AV file, for example, from T + t3, the link information is
The first stream section S3 that appears thereafter is specified.

FIG. 5 shows the format of the accumulated data file formed by the system controller 20.

The accumulated data file is a file identifier,
It is composed of time stamp information, link information and entity information. Of these, the file identifier indicates the attribute of the file. When storing file data as entity information, the "identifier" is set to "entity." When specifying the file data as a link on the TS packet stream, the "identifier" is set to "link". The "time stamp information" stores the start time stamp and end time stamp of the file acquired in step S102 of FIG. The "link information" stores the link information of the data file generated in step S105 of FIG. The "entity information" stores the data of the data file extracted in step S104 of FIG.

Here, the "file identifier" is "link".
If no, no data is stored in the “entity information”.
If the “file identifier” is “entity”, no data is stored in the “link information”.

FIG. 6 shows an example of a case in which a storage data file is actually formed for the data file 1 and the data file 2 by the above format.

First, the data file 1 will be described with reference to FIG.

As shown in FIG. 3, the data file 1
The file storage availability flag of is “NG”. Therefore, data file 1 is prohibited from being stored as substantive information.
Will be specified by the link information as described above. As a result, the “file identifier” of the accumulated data file is set to “link”.

The start time stamp t1 and the end time stamp t5 shown in FIG. 3 are stored in the "time stamp information". Furthermore, the pointers m11 and m12 that specify the stream section of the data packet D1 are stored in the “link information”. As described above, since it is prohibited to store in the file as the entity information, no data is stored in the “entity information”.

Next, the data file 2 will be described with reference to FIG.

As shown in FIG. 3, the data file 1
The file storage availability flag of is “OK”. Therefore, the data file 2 is allowed to be stored as substantive information, and therefore the data of the data packet 2 is stored in the stored data file. As a result, the “file identifier” of the accumulated data file is set to “entity”.

The start time stamp t2 and the end time stamp t4 shown in FIG. 3 are stored in the "time stamp information". Further, the data of the data packet 2 is stored in "substantial information". As mentioned above, since it is allowed to store in the file as the entity information,
No data is stored in the "link information".

Finally, the operation of reproducing the received information stored in the storage device 17 as described above will be described with reference to FIG.

When an instruction to reproduce stored information is input from the remote control transmitter 14, the TS stored in the storage device 17 is input.
The packet stream is read to the buffer memory 16. Further, the accumulated data file corresponding to the TS packet stream is read from the accumulation device 17 and supplied to the system controller 20.

After storing the accumulated data file in the work RAM 19, the system controller 20 refers to the "file identifier" in the accumulated data file,
Identify the attributes of the file. If the attribute is "entity", the file data stored in "entity information" is supplied to the data display circuit 22 at the timing defined by the "time stamp information". If the attribute is “link”, the stream section of the data packet on the TS packet stream in the buffer memory 16 is specified according to the link information (pointer) stored in the “link information”, and the stream section of the stream section is identified. File data is generated by extracting only data packets from the packets. Then, this file data is supplied to the data display circuit 22 at the timing defined by the "time stamp information".

On the other hand, the TS packet stream read out to the buffer memory 16 is supplied to the coder 6 by AV through the selector 5. In response to this, AV coder 6
Extracts video packets and audio packets in the TS packet stream and supplies video data and audio data to the video processing circuit 7 and the audio processing circuit 11, respectively.

Video processing circuit 7 supplied with video data
Reproduces the video data and outputs it to the mixer 8. The mixer 8 combines the video data reproduced by the video processing circuit 7 and the file data from the data display circuit 22 and outputs the synthesized data to the video output circuit 9. The video output circuit 9 synthesizes the video data from the mixer 8 and the data packet of the data broadcast, and displays the reproduced video on the CRT 10.

The audio processing circuit 11 reproduces the audio data from the AV decoder 6 and outputs it to the audio output circuit 12.
The audio output circuit 12 outputs the audio data reproduced by the audio processing circuit 11 to the speaker 13. Speaker 13
Outputs audio data to the outside.

As a result, the information read from the storage device 17 is reproduced and output by the CRT 10 and the speaker 13 and provided to the user as audiovisual information.

Although the embodiments according to the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made.

For example, in the above embodiment, two types of “file identifier”, “link” and “entity”, are shown. In addition to this, as shown in FIG. 7, “link & entity” is added. May be. The "link &entity" indicates that, among the data packets forming the data file, only some of the packets are prohibited from being accumulated by the entity information. In such a case, the file accumulation permission flag of FIG. 3 prohibits accumulation of the entire file as data (all prohibited), permits accumulation of the entire file as data (all permitted), or accumulates as data. Specify a packet that is prohibited (Prohibit P specification:
It has three types of information, that is, a forbidden packet number).

Here, when the "file identifier" is "prohibited P specification", the system controller 20 generates the link information only for the data packet specified thereby. Such link information is stored in "link information" of the accumulated data file shown in FIG. As for the other data packets, the data is extracted from the data packet and stored in the "substantial information" of the accumulated data file, as described above. Therefore, in such a case, data is stored in both the "link information" and the "entity information" in the file format of FIG. 5 at the same time.

Further, in the above-mentioned embodiment, the final packet of the link information is designed to actually specify the final data packet position by the pointer, but instead of this, the number of packets from the start packet of the stream section. The final packet may be specified by.

Further, in the above embodiment, the TS packet stream is stored in the storage device 17 as it is, but instead of this, the video packet and the audio packet are extracted from the TS packet stream to generate the AV file. Alternatively, this may be stored in the storage device 17.

In addition, the embodiment of the present invention can be appropriately modified in various ways within the scope of the technical idea of the present invention.

[0079]

As described above, according to the present invention, the file format at the time of storage on the receiving system side is defined, and in particular, data is stored according to the file format while determining whether or not it can be stored as substantive information. Since the information is stored, it is possible to simultaneously solve the problem of copyright and the like and the problem of access time during reproduction, which are shown in the above-mentioned conventional technique.

Further, since the files are stored for each file according to the file format, for example, even if some files are deleted from the storage means or new files are stored in the storage means, they are stored in other files. It has no effect, and thus any file can be easily stored and deleted. That is, when the attributes and the like of all files are separately managed by the management information, the management information must be re-edited according to the accumulation and deletion of a predetermined file. Since attributes and the like are managed independently, even if a predetermined file is newly accumulated or deleted, it is not necessary to re-edit other files. Therefore, it is only necessary to store and delete a file for that file.

As described above, according to the present invention, the file information can be accumulated by a simple accumulation process while simultaneously solving the above-mentioned problems such as copyright and the problem of access time during reproduction. In particular, when applied to a storage device such as a BS digital broadcast, an excellent effect can be obtained.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a digital satellite broadcast receiver according to an embodiment.

FIG. 2 is a flowchart showing a received information storage operation according to the embodiment.

FIG. 3 is a diagram showing a relationship between a TS packet stream and various kinds of information according to the embodiment.

FIG. 4 is a diagram explaining a data packet stream section according to the embodiment.

FIG. 5 is a diagram showing a format of a data file according to the embodiment.

FIG. 6 is an example in which a file is actually constructed by the format.

FIG. 7 is a diagram showing a data file format according to another embodiment.

[Explanation of symbols]

16 buffer memory 17 Storage device 19 Work RAM 20 system controller 21 Program memory

Claims (10)

[Claims] 1. An information storage device, comprising: a file structuring means for structuring a predetermined file from an information stream; and an accumulating means for accumulating file information constituted by the file structuring means, wherein the file structuring means comprises: From the information stream, file identification information for identifying the type of the file, time stamp information for defining start time and end time on the reproduction time axis, link information for defining a pointer to the information stream, An information storage device, wherein the file is configured such that the extracted entity information of the file can be stored separately. 2. The information storage device according to claim 1, further comprising: a determination unit that extracts the entity information from the information stream and determines whether or not it can be stored in the file, and the determination unit is an entity. When it is determined that the information can be stored in the file, the information for displaying that the file includes the entity information is stored as the file identification information, and the entity information is extracted from the information stream. When the file is stored in the file and the determining unit determines that the entity information cannot be stored in the file, the information for displaying that the file includes link information is stored as the file identification information, and An information storage device, characterized in that link information for defining a pointer to an information stream is stored in the file. 3. The method according to claim 2, wherein the determination means determines that the entity information can be stored in the file.
An information storage device, wherein the link information is not stored in the file. 4. The method according to claim 2, wherein the determination means determines that the entity information cannot be stored in the file,
An information storage device, characterized in that the entity information is not stored in the file. 5. An information storage method for storing a file constituting a predetermined file from an information stream and storing the file information in a storage means, wherein the file configuration is for identifying the type of the file. File identification information, time stamp information defining the start time and end time on the reproduction time axis, link information for defining a pointer to the information stream, and entity information of the file extracted from the information stream. An information storage method characterized in that it is formatted and stored so that it can be stored separately. 6. The information storage method according to claim 5, further comprising: a determination step of determining whether or not the entity information can be stored in the file by extracting the entity information from the information stream. When it is determined that the information can be stored in the file, the information for displaying that the file includes the entity information is stored as the file identification information, and the entity information is extracted from the information stream. When the file is stored in the file, and the determination unit determines that the entity information cannot be stored in the file, the information for displaying that the file includes link information is stored as the file identification information, and Information storage characterized by storing link information for defining a pointer to an information stream in the relevant file Method. 7. The method according to claim 6, wherein the determination means determines that the entity information can be stored in a file,
The information storage method is characterized in that the link information is not stored in the file. 8. The information storage method according to claim 6, wherein when the determination step determines that the entity information cannot be stored in the file, the entity information is not stored in the file. 9. File identification information for identifying a file type, time stamp information for defining a start time and an end time on a reproduction time axis, and link information for defining a pointer to the information stream. A storage medium, wherein the file is stored in a format that can be stored separately from the entity information of the file extracted from the information stream. 10. File identification information for identifying a file type, time stamp information for defining a start time and an end time on a playback time axis, and link information for defining a pointer to the information stream, A storage medium that stores a control program that controls so that the entity information of the file extracted from the information stream can be stored separately.