WO2015166817A1

WO2015166817A1 - Information processing device, information recording medium, and information processing method and program

Info

Publication number: WO2015166817A1
Application number: PCT/JP2015/061801
Authority: WO
Inventors: 山本　和夫
Original assignee: ソニー株式会社
Priority date: 2014-04-30
Filing date: 2015-04-17
Publication date: 2015-11-05

Abstract

This invention increases the speed of random-access playback processing from an information recording medium on which Common File Format (CFF) file configuration data is recorded. When CFF configuration data is recorded onto said information recording medium, random-access information such as an mfra box is recorded in a region adjacent to a region in which attribute information corresponding to CFF whole-file data, such as a moov box, is recorded. After reading out said attribute information (moov, etc.), a playback device reads out the random-access information in the adjacent region, making it such that processing for acquiring randomly accessible data can be performed expeditiously and allowing efficient random-access playback with reduced processing times, e.g. seek time.

Description

Information processing apparatus, information recording medium, information processing method, and program

The present disclosure relates to an information processing device, an information recording medium, an information processing method, and a program. More specifically, the present invention relates to an information processing apparatus, an information recording medium, an information processing method, and a program that enable efficient data reproduction by reducing a seek operation necessary for reproduction processing from a disc.

DVD (Digital Versatile Disc) and BD (Blu-ray (registered trademark) Disc) are widely used as information recording media for recording various contents such as movies and music.

Various data such as images, sounds, and reproduction control data are recorded on these discs in a data recording format defined in advance.
In BD (Blu-ray (registered trademark) Disc), several data recording formats dedicated to BD are defined. For example, a BDMV (Blu-ray (registered trademark) Disc Movie) format is defined and widely used in BD-ROM as a data recording format compatible with BD-ROM.

On the other hand, recently, DECE (Digital Entertainment Content Ecosystem), which is a standardization organization related to the MP4 format, has standardized CFF (Common File Format) as a new MP4-based file format.
As a patent document describing an example of recording an MP4 file on a medium, there is, for example, Patent Document 1 (Japanese Patent Laid-Open No. 2013-55511).

CFF (Common File Format) is a format suitable for recording and playback of content using, for example, a flash memory. Specifically, a division data [fragmented movie] is set by setting division data of data such as an image. ] Are stored in a storage area called a box and managed.

JP 2013-55511 A

When content according to the above-mentioned CFF file format is recorded in the flash memory and reproduced, smooth reproduction can be expected, but when recorded on a disc such as a BD, there may be a problem in content reproduction.
Specifically, random access point information is set at the end of the CFF file in the standard file setting order of the CFF file. Therefore, if a CFF file is recorded on a disk-type medium as it is in accordance with this standard file setting order, the seek distance for reading random access point information becomes long. When the seek distance is increased, the waiting time until the reproduction is started increases, and a reproduction delay occurs.

The present disclosure has been made in view of the above-described problems, for example. Specifically, for example, an information processing apparatus, an information recording medium, and an information processing method capable of reducing the seek time during random access playback and enabling quick playback in playback processing from a disc on which a CFF file is recorded, The purpose is to provide a program.

The first aspect of the present disclosure is:
A data processing unit for recording configuration data in a CFF (Common File Format) file format on an information recording medium;
The data processing unit
There is an information processing apparatus that records random access information, which is constituent data of a CFF file, in a region adjacent to a recording region of attribute information corresponding to the entire CFF file data.

The second aspect of the present disclosure is:
A data processing unit for reproducing data from an information recording medium in which configuration data in a CFF (Common File Format) file format is recorded;
The data processing unit, when executing a random access playback process,
Read attribute information corresponding to the entire CFF file data,
Following the attribute information reading process, the random access information recorded in the adjacent area of the attribute information recording area is read, the recording position of the randomly accessible data is acquired, and the acquired data is read and reproduced. It is in an information processing apparatus that executes processing.

The third aspect of the present disclosure is:
An information recording medium that records configuration data in a CFF (Common File Format) file format,
Random access information, which is CFF file configuration data, is recorded in an adjacent area of the attribute information recording area corresponding to the entire CFF file data,
A reproducing apparatus for reproducing data from the information recording medium reads random access information recorded in an adjacent area of the attribute information recording area following the attribute information reading process, and stores random access data. The present invention is an information recording medium that can acquire a recording position, read the acquired data, and perform a random access reproduction process.

The fourth aspect of the present disclosure is:
An information processing method executed in an information processing apparatus,
The information processing apparatus includes a data processing unit that records configuration data in a CFF (Common File Format) file format on an information recording medium,
The data processing unit is
There is an information processing method for recording random access information, which is constituent data of a CFF file, in a region adjacent to a recording region of attribute information corresponding to the entire CFF file data.

The fifth aspect of the present disclosure is:
An information processing method executed in an information processing apparatus,
The information processing apparatus includes a data processing unit that performs data reproduction from an information recording medium that records configuration data in a CFF (Common File Format) file format.
The data processing unit, when executing a random access playback process,
Read attribute information corresponding to the entire CFF file data,
Following the attribute information reading process, the random access information recorded in the adjacent area of the attribute information recording area is read, the recording position of the randomly accessible data is acquired, and the acquired data is read and reproduced. There is an information processing method for executing processing.

The sixth aspect of the present disclosure is:
A program for executing information processing in an information processing apparatus;
The information processing apparatus includes a data processing unit that records configuration data in a CFF (Common File Format) file format on an information recording medium,
The program is stored in the data processing unit.
There is a program for recording random access information, which is constituent data of a CFF file, in an area adjacent to a recording area of attribute information corresponding to the entire data of the CFF file.

The seventh aspect of the present disclosure is:
A program for executing information processing in an information processing apparatus;
The information processing apparatus includes a data processing unit that performs data reproduction from an information recording medium that records configuration data in a CFF (Common File Format) file format.
The program is stored in the data processing unit.
Read the attribute information corresponding to the entire CFF file data,
Following the attribute information read processing, the random access information recorded in the adjacent area of the attribute information recording area is read, the recording position of the randomly accessible data is acquired, and the acquired data is read. In the program for executing the random access playback process.

Note that the program of the present disclosure is a program that can be provided by, for example, a storage medium or a communication medium provided in a computer-readable format to an information processing apparatus or a computer system that can execute various program codes. By providing such a program in a computer-readable format, processing corresponding to the program is realized on the information processing apparatus or the computer system.

Further objects, features, and advantages of the present disclosure will become apparent from a more detailed description based on embodiments of the present disclosure described below and the accompanying drawings. In this specification, the system is a logical set configuration of a plurality of devices, and is not limited to one in which the devices of each configuration are in the same casing.

According to the configuration of the embodiment of the present disclosure, it is possible to increase the speed of the random access reproduction process from the information recording medium on which the CFF file configuration data is recorded.
Specifically, when recording configuration data in a CFF (Common File Format) file format on an information recording medium, an mfra box, which is random access information, is used as a moov box, which is attribute information corresponding to the entire CFF file data. Etc. are recorded in the adjacent area of the recording area. The playback device can quickly execute random-accessible data acquisition processing by reading out random access information in the adjacent area after reading out attribute information (moov, etc.) corresponding to the entire CFF file data, seek time, etc. This makes it possible to perform efficient random access reproduction with reduced processing time.
With this configuration, it is possible to increase the speed of the random access reproduction process from the information recording medium on which the CFF file configuration data is recorded.
Note that the effects described in the present specification are merely examples and are not limited, and may have additional effects.

It is a figure explaining a CFF file format. It is a figure explaining the data position accessible based on the storage information of the mfra box 15, and the data position accessible from the storage information of the mflo box 16. FIG. It is a figure explaining the data access procedure in the case of performing random access reproduction | regeneration using the random access information recorded on the CFF file, ie, the random access information recorded on the mfra box 15. FIG. It is a figure explaining the example of a disk structure at the time of recording a CFF file on a disk as it is according to a standard data setting order. It is a figure explaining the reproduction | regeneration sequence in the case of performing random access reproduction | regeneration processing of a content using the disk which recorded the CFF file according to the standard data setting order. It is a figure explaining the example of a disk structure at the time of recording a CFF file on a disk according to the improved data setting order. It is a figure explaining the reproduction | regeneration sequence in the case of performing the random access reproduction | regeneration processing of a content using the disk which recorded the CFF file in the improved data setting order. FIG. 25 is a diagram for describing a configuration example of an information processing device.

The details of the information processing apparatus, information recording medium, information processing method, and program of the present disclosure will be described below with reference to the drawings. The description will be made according to the following items.
1. 1. About CFF file format 2. Problems when CFF files are recorded on disk-type media 4. Regarding an improvement example of the recording configuration of a CFF file on a disc 4. Regarding an example configuration of an information processing device Summary of composition of this disclosure

[1. About CFF file format]
As described above, DECE (Digital Entertainment Content Ecosystem), which is a standardization organization related to the MP4 format, has standardized CFF (Common File Format) as a new MP4-based file format.

CFF (Common File Format) is a format suitable for recording and playback of content using, for example, flash memory. Each piece of divided data such as images [fragmented movie] is stored in a storage area called a box. Has a format to manage.

First, the CFF file format will be described with reference to FIG.
The CFF file is a standardized format based on the MP4 file format defined by ISO / IECC 14496-14.

FIG. 1 is a diagram showing an example of a standard CFF (Common File Format) file format.
The CFF file format has a data storage area in units of boxes, and data defined in units of boxes is stored in each box.
In each box, an area for recording data of box size (box-size), box type (box-type), and box data (box-data) is set.
The box data size (byte size) is recorded in the box size (box-size).
In the box type (box-type), the type of data stored in the box is recorded.
In the box data (box-data), data of the type indicated by the box type is recorded.

As shown in FIG. 1, the following types of boxes are set in the CFF.
FileType Box (ftype box) 11,
Movie Box (moov box) 12,
Movie Fragment Box (moof box) 13,
Movie Data Box (mdat box) 14,
Movie Fragment Random Access Box (mfra box) 15,
Movie Fragment Random Access Offset Box (mfro box) 16,
Each box above is set.

In the ftype box 11, file type information, for example, information on the file conforming to the CFF file format, the configuration of the entire file, and the like are recorded.
The moov box 12 is a box set as a storage area for metadata such as reproduction control information for storage data of the entire CFF file.
Although not shown, one or more trak boxes are set in the moov box 12. The trak box can be set for each data type such as image, sound, subtitle, etc., and stores reproduction sequence information of each data.

Actual data that is reproduction target data such as images, sounds, and subtitles is divided into mdat boxes 14 and stored.
Each of the mdat boxes 14 is associated with a moof box 13, and the moof box 13 includes meta information such as attribute information and reproduction control information related to the divided actual data stored in the mdat box 14 associated with the moof box 13. Store the data.

The CFF file shown in FIG. 1 stores a large number of set data using the actual data (mdat) that is the divided data of the reproduction target data and the metadata (moof) corresponding to each divided actual data as one set data, , Metadata about the stored plurality of set data is stored in the moov box 12.

Although not shown, a traf box is set inside the metadata (moof) corresponding to the divided real data. The traf box stores reproduction sequence information of actual data (mdat) associated with each moof.

Note that if the playback data stored in the CFF file includes a plurality of different image data, for example, HD images, 4K images, etc., it is possible to set individual trak boxes according to these image types. .
In addition, when the audio data stored in the CFF file includes a plurality of different audio data, for example, Japanese audio, English audio, etc., individual trak boxes can be set according to these audio types.
Similarly, when the stored subtitle data of the MP4 file includes a plurality of different subtitle data, for example, Japanese subtitles, English subtitles, etc., individual trak boxes can be set according to these subtitle types.

The mfra box 15 is a box that stores random access point information.
As described above, the CFF file format is a format standardized on the basis of the MP4 file format defined by ISO / IECC 14496-14, and can store, for example, MPEG4-based encoded image data as the image data. Has a configuration. MPEG image data is composed of an independently decodable I picture, a decodable P picture, a B picture, etc. with reference to either the preceding or following image data. There is a restriction that an image set at a random access position is an I picture.

The mfra box 15 recorded in the CFF file is, for example, the data position of an image having a condition for a random access image such as the above-mentioned I picture, that is, the recording position in the CFF file (for example, an offset from the reference position). Information etc.) is recorded.
By referring to the recording information in the mfra box 15, image data serving as a random access point can be acquired.
Information necessary for reading the mfra box 15 such as size information of the mfra box 15 is recorded in the mfr box 16.

For example, when the user instructs the playback apparatus equipped with the medium storing the CFF file to play back content such as a movie from an intermediate position, the playback application (program) first reads the mfro box 16.
In the mflo box 16, the recording position of the mfra box 15 is recorded.
The playback application confirms the reading position of the mfra box 15 based on the data stored in the mfr box 16, and then acquires the random access point information recorded in the mfra box 15.

Next, based on the random access point information acquired from the mfra box 15, the recording position in the medium of the randomly accessible image located near the user's random access reproduction designated position is specified and recorded at the specified position. The acquired image data is acquired and playback is started.
Through these processes, playback from the middle of the content, that is, random access playback is performed.

FIG. 2 is a diagram showing the data positions accessible based on the storage information in the mfra box 15 and the data positions accessible from the storage information in the mfr box 16 by dotted arrows.

As shown in FIG. 2, the mfra box 15 can be accessed based on the recording information in the mflo box 16.
Further, according to the random access point information stored in the mfra box 15, the head position of a pair of management data (moof) such as image data to be a random access position and actual data (mdat) such as an image to be reproduced is determined. And can be accessed.

[2. Problems when recording CFF files on disc-type media]
When content according to the above-mentioned CFF file format is recorded in the flash memory and reproduced, smooth reproduction can be expected, but when recorded on a disc such as a BD, there may be a problem in content reproduction.

This problem occurs in the random access reproduction process using the random access point information recorded in the mfra box 15 described with reference to FIG.
As shown in FIG. 1, in the standard file setting order of a CFF file, a box storing random access point information and data necessary for reading the file, that is, an mfra box 15 and an mfro box 16 are at the end of the CFF file. Is set.

When the CFF file is recorded on a disc such as a BD in accordance with the standard file setting order of the CFF file shown in FIG. A box storing the point information and data necessary for reading it, that is, the mfra box 15 and the mfro box 16 are recorded at the outermost peripheral position of the disc.

Therefore, in order to read the random access point information, a seek process for moving the read head to the outermost circumference of the disk is required, and a seek with a long seek distance must be performed.
As the seek distance increases, the waiting time until the start of playback increases, and smooth playback is hindered. That is, a large reproduction delay occurs.

FIG. 3 is a diagram for explaining a data access procedure when random access reproduction is performed using random access information recorded in the CFF file, that is, random access information recorded in the mfra box 15.

The playback application (program) executed in the data processing unit of the information processing apparatus that executes content playback executes random access playback processing according to the following data access procedure (steps S1 to S4).

(Step S1)
First, the ftype box 11 and the moov box 12 are read.
The ftype box 11 acquires configuration information and the like of the entire CFF file, and the moov box acquires data included in the CFF file, for example, codec information (encoding mode information) such as images and sounds.

(Step S2)
Next, the mflo box 16 is read, and the reading position of the mfra box 15 is acquired.

(Step S3)
Thereafter, in step S3, the random access point information recorded in the mfra box 15 is acquired.

(Step S4)
Next, in step S4, based on the acquired random access point information, the recording position in the medium of the image data at the random access point position that is close to the user's random access reproduction designated position is specified, and recorded at the specified position. Image data (mdat22) and its meta information (moof21) are acquired and reproduction is started.

Through these processes, playback from the middle of the content, that is, random access playback is performed.

FIG. 4 is a diagram illustrating an example in which a CFF file is recorded as it is on a disc 50 such as a BD in accordance with the standard data setting order of the CFF file.
As shown in FIG. 4, when the disk 50 is divided into three areas of an inner area, an intermediate area, and an outer area, the correspondence between the following data included in the CFF file and the recording area of the disk is as follows. It becomes.

(A) Recording data in the inner peripheral area FileType Box (ftype box) 11,
Movie BOX (moov box) 12,
(B) Recording data in the intermediate area Movie Fragment Box (moof box) 13,
Movie Data Box (mdat box) 14,
(C) Recording data of outer peripheral area Movie Fragment Random Access Box (mfra box) 15,
Movie Fragment Random Access Offset Box (mfro box) 16,
Each data is recorded with the above settings.

Note that (b) the recording data of the intermediate area,
Movie Fragment Box (moof box) 13,
Movie Data Box (mdat box) 14,
A plurality of these data pairs are recorded in the intermediate area.

As described above, in the data recording configuration of FIG. 4, the mfra box 15 in which information necessary for the random access process is recorded and the mfro box 16 are recorded in the outer peripheral area of the disk 50.

When random access reproduction is performed using the disk 50 on which such data recording has been performed, an access procedure for the disk 50 will be described with reference to FIG.
A disc 50 shown in FIG. 5 schematically shows a cross section of the disc. The recording data area from the disk center 51 to the disk outer edge 52 is divided into an inner area, an intermediate area, and an outer area as in FIG.

An information processing apparatus that executes content playback executes playback of content recorded on the disc 50 by mounting the disc 50. The data processing unit of the information processing apparatus executes content reproduction according to a reproduction application (program).
When performing random access playback processing, the playback application executes processing according to the following data access procedure (steps S11 to S14).

(Step S11)
First, the ftype box 11 and the moov box 12 recorded in the inner peripheral area of the disc 50 are read.
The ftype box 11 acquires configuration information and the like of the entire CFF file, and the moov box acquires data included in the CFF file, for example, codec information (encoding mode information) such as images and sounds.

(Step S12)
Next, the mflo box 16 recorded in the outer peripheral area of the disk 50 is read, and the reading position of the mfra box 15 is acquired.
Here, the read head performs a seek process from the innermost circumference to the outermost circumference of the disk between step S11 and step S12. A large time loss occurs in this seek process.

(Step S13)
Thereafter, in step S13, the random access point information recorded in the mfra box 15 is acquired.

(Step S14)
Next, in step S14, based on the random access point information acquired from the mfra box 15, the recording position in the medium of the image data at the random access point position that is close to the user's random access reproduction designated position is specified, and the specified position The image data (mdat22) and its meta information (moof21) recorded in the above are acquired and reproduction is started.

As described above, when performing random access reproduction, it is necessary to read the mfra box 15 and the mfro box 16 recorded on the outer periphery of the disc after reading the ftype box 11 and the moov box 12 recorded on the inner peripheral region of the disc. In this case, a large seek process occurs, and the seek time becomes long, and the time until the start of reproduction is delayed.

[3. Example of improved recording configuration of CFF file on disc]
Next, a description will be given of an example of a recording configuration of a CFF file with respect to a disk that solves the above-described problem.

FIG. 6 is a diagram illustrating an example of recording a CFF file on the disc of the present disclosure.
FIG. 5 is a diagram showing an example in which a CFF file is recorded on a disc 50 such as a BD as in FIG. 4.
In this example, as shown in FIG. 6, when the disc 50 is divided into three areas of an inner area, an intermediate area, and an outer area, the correspondence between the following data included in the CFF file and the recording area of the disk is as follows. It becomes as follows.

(A) Recording data in the inner peripheral area FileType Box (ftype box) 11,
Movie BOX (moov box) 12,
(B) Recording data in the intermediate area Movie Fragment Random Access Box (mfra box) 15,
Movie Fragment Random Access Offset Box (mfro box) 16,
(C) Recording data of outer peripheral area Movie Fragment Box (moof box) 13,
Movie Data Box (mdat box) 14,
Each data is recorded with the above settings.

Incidentally, (c) is the recording data of the outer peripheral area,
Movie Fragment Box (moof box) 13,
Movie Data Box (mdat box) 14,
A plurality of these data pairs are recorded in the outer peripheral area.

The difference between the data recording example shown in FIG. 6 and the data recording example shown in FIG. 4 described above is that the recording data in the intermediate area and the recording data in the outer peripheral area are interchanged.
That is, the data recording configuration for the disk 50 shown in FIG.
The mfra box 15 and the mfrp box 16 that need to be read in the random access process are recorded in an intermediate area adjacent to the inner peripheral area of the disk 50.

The moof box 13 and the mdat box 14 recorded in the intermediate area in the example shown in FIG. 4 described above are moved to the outer peripheral area in the configuration shown in FIG.
As described above, in the configuration shown in FIG. 6, the mfra box 15 in which information necessary for the random access process is recorded and the mfro box 16 are recorded in an intermediate area adjacent to the inner peripheral area of the disc 50.
The inner peripheral area is a recording area such as a moov box in which attribute information and the like of the entire disc is recorded, and random access information such as an mfra box is recorded in an intermediate area adjacent to the inner peripheral area.

A procedure for accessing the disk 50 when the random access reproduction is executed using the disk 50 having the data recording shown in FIG. 6 will be described with reference to FIG.
The disc 50 shown in FIG. 7 schematically shows a cross section of the disc as in FIG. 5 described above. The recording data area from the disk center 51 to the disk outer edge 52 is divided into an inner area, an intermediate area, and an outer area as in FIG.

An ftype box 11 and a moov box 12 are recorded in the inner peripheral area, and an mfra box 15 and an mfro box 16 are recorded in the intermediate area.
The mdat box, which is a record box of actual data to be reproduced, and the moof box storing the metadata have a configuration recorded in the outer peripheral area.

An information processing apparatus that executes content playback executes playback of content recorded on the disc 50 by mounting the disc 50. The data processing unit of the information processing apparatus executes content reproduction according to a reproduction application (program).
When the random access playback process is performed, the playback application executes a process according to the following data access procedure (steps S21 to S24).

(Step S21)
First, the ftype box 11 and the moov box 12 recorded in the inner peripheral area of the disc 50 are read.
The ftype box 11 acquires configuration information and the like of the entire CFF file, and the moov box acquires data included in the CFF file, for example, codec information (encoding mode information) such as images and sounds.

(Step S22)
Next, the mflo box 16 recorded in the intermediate area of the disk 50 is read, and the reading position of the mfra box 15 is acquired.
Here, since the intermediate area is an area adjacent to the inner peripheral area, the read head performs a seek process from the inner peripheral area of the disk to the adjacent area (intermediate area) between step S21 and step S22. Become. This seek distance is short, and the time loss here is small.

That is, in the setting of FIG. 5 described above, a long seek from the disk inner peripheral area to the outer peripheral area occurred at the time of transition from step S11 to step S12. However, in the data recording configuration shown in FIG. Only the seek from the area to the adjacent intermediate area occurs, the seek distance is shortened, and the seek time is shortened.

(Step S23)
Thereafter, in step S23, the random access point information recorded in the mfra box 15 recorded in the intermediate area is acquired.

(Step S24)
Next, in step S24, based on the random access point information acquired from the mfra box 15, the recording position in the medium of the image data at the random access point position close to the user's random access reproduction designated position is specified, and the specified position The image data (mdat22) and its meta information (moof21) recorded in the above are acquired and reproduction is started.

As described above, in the data recording configuration described with reference to FIGS. 6 and 7, when random access reproduction is performed, the reading of the ftype box 11 and the moov box 12 recorded in the inner peripheral area of the disc in step S21. In step S22, the mfra box 15 and the mfro box 16 recorded in the intermediate area adjacent to the inner peripheral area are read.
Between the data reading in step S21 and the data reading in step S22, it is only necessary to perform a seek process with a small seek distance, and the seek time is shortened. As a result, it is possible to reduce the time delay until the start of reproduction.

Note that an information processing apparatus that executes playback processing of recorded content on a disc first reads file system information recorded separately from the CFF file on the disc, performs address conversion according to the file system information, and performs each conversion on the disc. The recording position of data can be grasped. When reading data from the disk, processing using file system information is performed.

The file system information records information for determining the actual recording position of each data on the disk from the address of each data, and the reproduction application (program) executed by the information processing apparatus stores the file system information, The data is developed in the memory of the information processing apparatus, and using this information, the actual recording position information on the disk is obtained from the address corresponding to each data, and the data reading is executed.

A data recording apparatus for recording data on a disc generates file system information in which each data recording position on the disc and each data address are associated with each other in the recording process of the CFF file on the disc, and combines them with the CFF file. To record on the disc.
The data recording apparatus has a data processing unit that records configuration data in a CFF (Common File Format) file format. The data processing unit stores random access information (mfra box or the like) that is configuration data of a CFF file. A process of recording the attribute information (moov box or the like) corresponding to the entire CFF file data in an area adjacent to the recording area is executed.

Specifically, the data processing unit of the information processing apparatus sets the recording position of each data as described above with reference to FIGS. That is, the following settings are used.
(A) Recording data in the inner peripheral area FileType Box (ftype box) 11,
Movie BOX (moov box) 12,
(B) Recording data in the intermediate area Movie Fragment Random Access Box (mfra box) 15,
Movie Fragment Random Access Offset Box (mfro box) 16,
(C) Recording data of outer peripheral area Movie Fragment Box (moof box) 13,
Movie Data Box (mdat box) 14,
Record each data with the above settings.

By adopting such a data recording configuration, a playback device that performs content playback from a disc can shorten the required seek distance when performing random access playback processing. That is, the seek time is reduced, and the delay time until the start of reproduction can be reduced.
That is, when performing random access playback processing, a data processing unit of an information processing apparatus that performs data playback from an information recording medium that records configuration data in a CFF (Common File Format) file format first converts the data into the entire CFF file data. Read the corresponding attribute information (moov box etc.). Next, the random access information (mfra box etc.) recorded in the adjacent area of the attribute information recording area is read, the recording position of the randomly accessible data is acquired, the acquired data is read and the reproduction process is executed. To do.
Specifically, according to the reproduction sequence (steps S21 to S24) described above with reference to FIG. 7, each data is read and reproduction processing is executed.

[4, Configuration example of information processing device]
Next, a configuration example of an information processing apparatus that performs data recording on a disk or data reproduction from a disk will be described with reference to FIG.
The information processing apparatus 100 illustrated in FIG. 8 executes, for example, data reproduction processing or data recording processing from an information recording medium.
The information processing apparatus 100 has a configuration in which a medium 110 that is a disc-type information recording medium such as a BD can be mounted.
The media interface 103 is an interface applied to data reproduction processing using the medium 110 or data recording processing. In accordance with a request from the data processing unit 101, data reading processing from the medium 110, data recording processing to the medium 110, and the like are performed.

The medium 110 includes various media (information recording media) such as Blu-ray (registered trademark) Disc, DVD, and hard disk.

The information processing apparatus 100 further includes a data processing unit 101, a storage unit 102, an input unit 104, an output unit 105, a display device IF 106, and a communication unit 107, as shown in FIG.

The data processing unit 101 has a CPU or the like having a program execution function, and executes, for example, data recording processing for the media 110 or data playback processing from the media 110. Further, data communication control via the communication unit 107 is performed. Specifically, it controls the overall processing executed by the device, such as communication control when receiving data from an external device such as a server.

The data recording process for the medium 110 executed by the data processing unit 110 is executed as a CFF file recording process according to the data recording configuration shown in FIGS. 6 and 7 described above, for example.
In the data reproduction process, for example, a random access reproduction process according to the sequence of steps S21 to S24 described above with reference to FIG. 7 is executed.

The storage unit 102 includes a RAM, a ROM, and the like, and is used for a program executed in the data processing unit 101, various parameters, a storage area for received data, and the like.

The communication unit 107 is used, for example, for communication processing with an external device, a server, a broadcasting station, or the like. The input unit 104 is, for example, a user operation unit, and various inputs such as a data recording or reproduction instruction and a copy instruction are performed. Note that the input unit 104 includes a remote control 108, and remote control operation information can also be input. The output unit 105 includes a display unit that displays a message presented to the user, outputs a warning sound, and the like, a speaker, and the like.
The display device IF 106 outputs reproduction data to the display device 120 such as a television.

[5. Summary of composition of the present disclosure]
As described above, the embodiments of the present disclosure have been described in detail with reference to specific embodiments. However, it is obvious that those skilled in the art can make modifications and substitutions of the embodiments without departing from the gist of the present disclosure. In other words, the present invention has been disclosed in the form of exemplification, and should not be interpreted in a limited manner. In order to determine the gist of the present disclosure, the claims should be taken into consideration.

The technology disclosed in this specification can take the following configurations.
(1) A data processing unit that records configuration data in a CFF (Common File Format) file format on an information recording medium,
The data processing unit
An information processing apparatus that records random access information, which is constituent data of a CFF file, in a region adjacent to a recording region of attribute information corresponding to the entire CFF file data.

(2) The random access information is information recorded in an mfra box defined in a CFF file format, and the data processing unit uses the mfra box and an mfro box in which access information for the mfra box is recorded as CFF. The information processing apparatus according to (1), wherein the information is recorded in an area adjacent to a recording area of attribute information corresponding to the entire file data.

(3) The attribute information corresponding to the entire data of the CFF file is information recorded in an ftype box and a moov box specified in the CFF file format, and the data processing unit converts the random access information into the ftype The information processing apparatus according to (1) or (2), wherein the information is recorded in an area adjacent to a recording area of the box and the moov box.

(4) The data processing unit stores mfra in which random access information defined in the CFF file format is stored in an area adjacent to the recording area of the ftype box storing the attribute information corresponding to the entire data of the CFF file and the moov box. The information processing apparatus according to any one of (1) to (3), wherein data recording is performed by setting a box and a recording area of an mfro box in which access information for the mfra box is recorded.

(5) The information processing apparatus according to any one of (1) to (4), wherein the information recording medium is a disc-type information recording medium.

(6) having a data processing unit for reproducing data from an information recording medium in which configuration data in a CFF (Common File Format) file format is recorded;
The data processing unit, when executing a random access playback process,
Read attribute information corresponding to the entire CFF file data,
Following the attribute information reading process, the random access information recorded in the adjacent area of the attribute information recording area is read, the recording position of the randomly accessible data is acquired, and the acquired data is read and reproduced. An information processing apparatus that executes processing.

(7) The random access information is information recorded in an mfra box defined in a CFF file format, and the data processing unit stores the mfra box in which the mfra box and access information for the mfra box are recorded as CFF. The information processing apparatus according to (6), wherein a process of reading from an adjacent area of the attribute information recording area corresponding to the entire file data is executed.

(8) The attribute information corresponding to the entire data of the CFF file is information recorded in an ftype box and a moov box specified in the CFF file format, and the data processing unit converts the random access information into the ftype The information processing apparatus according to (6) or (7), wherein a process of reading from a box and an area adjacent to a recording area of the moov box is executed.

(9) The data processing unit reads the data from the recording area of the ftype box and the moov box storing attribute information corresponding to the entire data of the CFF file, and then stores the data in the recording area of the ftype box and the moov box. Read out the mfra box that stores the random access information defined in the CFF file format and the mfro box that records the access information for the mfra box from the adjacent area, and acquire the recording position of the randomly accessible data. The information processing apparatus according to any one of (6) to (8), wherein the read data is read and reproduction processing is executed.

(10) The information processing apparatus according to any one of (6) to (9), wherein the information recording medium is a disc-type information recording medium.

(11) An information recording medium in which configuration data in a CFF (Common File Format) file format is recorded.
Random access information, which is CFF file configuration data, is recorded in an adjacent area of the attribute information recording area corresponding to the entire CFF file data,
A reproducing apparatus for reproducing data from the information recording medium reads random access information recorded in an adjacent area of the attribute information recording area following the attribute information reading process, and stores random access data. An information recording medium capable of acquiring a recording position, reading the acquired data, and performing a random access reproduction process.

(12) The recording area of attribute information corresponding to the entire CFF file data is a recording area of an ftype box and a moov box defined in the CFF file format.
The information recording medium according to (11), wherein the recording area of the random access information is a recording area of an mfra box and an mfro box defined in a CFF file format.

(13) The information recording medium according to (11) or (12), wherein the information recording medium is a disk-type information recording medium.

(14) An information processing method executed in the information processing apparatus,
The information processing apparatus includes a data processing unit that records configuration data in a CFF (Common File Format) file format on an information recording medium,
The data processing unit is
An information processing method for recording random access information, which is constituent data of a CFF file, in a region adjacent to a recording region of attribute information corresponding to the entire CFF file data.

(15) An information processing method executed in the information processing apparatus,
The information processing apparatus includes a data processing unit that performs data reproduction from an information recording medium that records configuration data in a CFF (Common File Format) file format.
The data processing unit, when executing a random access playback process,
Read attribute information corresponding to the entire CFF file data,
Following the attribute information reading process, the random access information recorded in the adjacent area of the attribute information recording area is read, the recording position of the randomly accessible data is acquired, and the acquired data is read and reproduced. An information processing method for executing processing.

(16) A program for executing information processing in an information processing device,
The information processing apparatus includes a data processing unit that records configuration data in a CFF (Common File Format) file format on an information recording medium,
The program is stored in the data processing unit.
A program for recording random access information, which is configuration data of a CFF file, in an area adjacent to a recording area of attribute information corresponding to the entire CFF file data.

(17) A program for executing information processing in an information processing device,
The information processing apparatus includes a data processing unit that performs data reproduction from an information recording medium that records configuration data in a CFF (Common File Format) file format.
The program is stored in the data processing unit.
Read the attribute information corresponding to the entire CFF file data,
Following the attribute information read processing, the random access information recorded in the adjacent area of the attribute information recording area is read, the recording position of the randomly accessible data is acquired, and the acquired data is read. Program that executes random access playback processing.

Further, the series of processes described in the specification can be executed by hardware, software, or a combined configuration of both. When executing processing by software, the program recording the processing sequence is installed in a memory in a computer incorporated in dedicated hardware and executed, or the program is executed on a general-purpose computer capable of executing various processing. It can be installed and run. For example, the program can be recorded in advance on a recording medium. In addition to being installed on a computer from a recording medium, the program can be received via a network such as a LAN (Local Area Network) or the Internet and installed on a recording medium such as a built-in hard disk.

In addition, the various processes described in the specification are not only executed in time series according to the description, but may be executed in parallel or individually according to the processing capability of the apparatus that executes the processes or as necessary. Further, in this specification, the system is a logical set configuration of a plurality of devices, and the devices of each configuration are not limited to being in the same casing.

As described above, according to the configuration of the embodiment of the present disclosure, it is possible to increase the speed of the random access reproduction process from the information recording medium on which the CFF file configuration data is recorded.
Specifically, when recording configuration data in a CFF (Common File Format) file format on an information recording medium, an mfra box, which is random access information, is used as a moov box, which is attribute information corresponding to the entire CFF file data. Etc. are recorded in the adjacent area of the recording area. The playback device can quickly execute random-accessible data acquisition processing by reading out random access information in the adjacent area after reading out attribute information (moov, etc.) corresponding to the entire CFF file data, seek time, etc. This makes it possible to perform efficient random access reproduction with reduced processing time.
With this configuration, it is possible to increase the speed of the random access reproduction process from the information recording medium on which the CFF file configuration data is recorded.

DESCRIPTION OF SYMBOLS 11 ftype box 12 moov box 13 moof box 14 mdat box 15 mfra box 16 mflo box 21 moof box 22 mdat box 100 Information processing apparatus 101 Data processing part 102 Storage part 103 Media interface 104 Input part 105 Output part 106 Display apparatus interface 107 Part 108 remote control 110 media 120 display device

Claims

A data processing unit for recording configuration data in a CFF (Common File Format) file format on an information recording medium;
The data processing unit
An information processing apparatus that records random access information, which is constituent data of a CFF file, in a region adjacent to a recording region of attribute information corresponding to the entire CFF file data.
The random access information is information recorded in an mfra box defined in the CFF file format,
The data processing unit
The information processing apparatus according to claim 1, wherein the mfra box and an mfro box in which access information for the mfra box is recorded are recorded in an adjacent area of a recording area of attribute information corresponding to the entire CFF file data.
The attribute information corresponding to the entire CFF file data is information recorded in an ftype box and a moov box defined in the CFF file format,
The data processing unit
The information processing apparatus according to claim 1, wherein the random access information is recorded in an area adjacent to a recording area of the ftype box and the moov box.
The data processing unit
In an area adjacent to the ftype box storing attribute information corresponding to the entire CFF file data and the recording area of the moov box,
The information processing apparatus according to claim 1, wherein data recording is performed by setting a recording area of an mfra box storing random access information defined in the CFF file format and an mfra box recording access information for the mfra box.
The information processing apparatus according to claim 1, wherein the information recording medium is a disk-type information recording medium.
A data processing unit for reproducing data from an information recording medium in which configuration data in a CFF (Common File Format) file format is recorded;
The data processing unit, when executing a random access playback process,
Read attribute information corresponding to the entire CFF file data,
Following the attribute information reading process, the random access information recorded in the adjacent area of the attribute information recording area is read, the recording position of the randomly accessible data is acquired, and the acquired data is read and reproduced. An information processing apparatus that executes processing.
The random access information is information recorded in an mfra box defined in the CFF file format,
The data processing unit
The information processing apparatus according to claim 6, wherein the mfra box and the mfro box in which access information for the mfra box is recorded are read from an adjacent area of the attribute information recording area corresponding to the entire CFF file data.
The attribute information corresponding to the entire CFF file data is information recorded in an ftype box and a moov box defined in the CFF file format,
The data processing unit
The information processing apparatus according to claim 6, wherein the random access information is read from an area adjacent to a recording area of the ftype box and the moov box.
The data processing unit
Following the ftype box storing attribute information corresponding to the entire data of the CFF file and the data reading process from the recording area of the moov box,
From the area adjacent to the recording area of the ftype box and the moov box,
Read the mfra box storing the random access information defined in the CFF file format and the mfr box recording the access information for the mfra box, acquire the recording position of the randomly accessible data, and read the acquired data The information processing apparatus according to claim 6, wherein reproduction processing is executed.
The information processing apparatus according to claim 6, wherein the information recording medium is a disc-type information recording medium.
An information recording medium that records configuration data in a CFF (Common File Format) file format,
Random access information, which is CFF file configuration data, is recorded in an adjacent area of the attribute information recording area corresponding to the entire CFF file data,
A reproducing apparatus for reproducing data from the information recording medium reads random access information recorded in an adjacent area of the attribute information recording area following the attribute information reading process, and stores random access data. An information recording medium capable of acquiring a recording position, reading the acquired data, and performing a random access reproduction process.
The recording area of attribute information corresponding to the entire CFF file data is a recording area of an ftype box and a moov box defined in the CFF file format,
The information recording medium according to claim 11, wherein the recording area of the random access information is an mfra box defined in a CFF file format and a recording area of an mfro box.
12. The information recording medium according to claim 11, wherein the information recording medium is a disk-type information recording medium.
An information processing method executed in an information processing apparatus,
The information processing apparatus includes a data processing unit that records configuration data in a CFF (Common File Format) file format on an information recording medium,
The data processing unit is
An information processing method for recording random access information, which is constituent data of a CFF file, in a region adjacent to a recording region of attribute information corresponding to the entire CFF file data.
An information processing method executed in an information processing apparatus,
The information processing apparatus includes a data processing unit that performs data reproduction from an information recording medium that records configuration data in a CFF (Common File Format) file format.
The data processing unit, when executing a random access playback process,
Read attribute information corresponding to the entire CFF file data,
Following the attribute information reading process, the random access information recorded in the adjacent area of the attribute information recording area is read, the recording position of the randomly accessible data is acquired, and the acquired data is read and reproduced. An information processing method for executing processing.
A program for executing information processing in an information processing apparatus;
The information processing apparatus includes a data processing unit that records configuration data in a CFF (Common File Format) file format on an information recording medium,
The program is stored in the data processing unit.
A program for recording random access information, which is configuration data of a CFF file, in an area adjacent to a recording area of attribute information corresponding to the entire CFF file data.
A program for executing information processing in an information processing apparatus;
The information processing apparatus includes a data processing unit that performs data reproduction from an information recording medium that records configuration data in a CFF (Common File Format) file format.
The program is stored in the data processing unit.
Read the attribute information corresponding to the entire CFF file data,
Following the attribute information read processing, the random access information recorded in the adjacent area of the attribute information recording area is read, the recording position of the randomly accessible data is acquired, and the acquired data is read. Program that executes random access playback processing.