JP2015167059A - Information processor, information recording device, information recording medium, information processing method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information processor capable of acquiring a piece of user operation inhibition information prescribed in a BDMV data and storing the information in an MP4 file.SOLUTION: In a conversion processing of a BDMV format data into an MP4 format data, the information processor acquires a piece of user operation inhibition information for a reproduction data from a play list file preset in the BDMV data and stores the user operation inhibition information in a user operation inhibition information storage box preset in the MP4 file. The storage position in the user operation inhibition information storage box is changed according to the application range of the user operation inhibition information so as to store the user operation inhibition information as a unit of entire data stored in the MP4 file, a fragment unit or a sample group.

Description

  The present disclosure relates to an information processing device, an information recording 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 apparatus, an information recording medium, an information processing method, and a program that execute data recording with format conversion, for example.

  DVD (Digital Versatile Disc) and BD (Blu-ray (registered trademark) Disc) are widely used as information recording media (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.
For example, a BDMV (Blu-ray (registered trademark) Disc Movie) format is used as a data recording format for a BD.
In order to reproduce the recorded data in the BDMV format, it is necessary to hold a program for reproducing the BDMV format data.

In recent years, an increasing number of users are viewing content such as movies on smartphones (smartphones) and mobile terminals such as tablet terminals.
Such a portable terminal does not always have a playback application compatible with the BDMV format. Therefore, when copying the recording data of the BD to the media of the mobile terminal, it is necessary to change the recording format to a format that can be played back by the playback application of the mobile terminal that is not in the BDMV format.
Note that data copy processing between media is described in, for example, Japanese Patent Application Laid-Open No. 2008-98765 and Japanese Patent Application Laid-Open No. 2011-2222078.

There is an MP4 file format (hereinafter referred to as MP4) as a data recording format standardized in consideration of use by a portable terminal or the like.
Many mobile terminals have a playback application that can play back MP4 data recorded in the MP4 file format, and when recording content on the media of the mobile terminal, it is required to record in MP4 format.

Therefore, for example, when copying data in the BDMV format to a medium such as an SD card used in the portable terminal, it is necessary to perform a copy process with format conversion from BDMV to MP4.
However, no specific proposal for this format conversion has been made at present. If format conversion is not performed reliably, content reproduction at the copy destination may not be possible.

JP 2008-98765 A JP 2011-2222078

  The present disclosure has been made in view of such problems. For example, an information processing apparatus and an information recording apparatus that enable normal data reproduction after format conversion in a configuration in which data recording processing involving format conversion is performed. It is an object to provide an information recording medium, an information processing method, and a program.

The first aspect of the present disclosure is:
A data conversion unit for performing format conversion from the first data format to the second data format;
A control unit that obtains information to be applied to the conversion process executed by the data conversion unit
The controller is
User operation prohibition information corresponding to reproduction data is acquired from a reproduction control file that is constituent data of the first data format,
The data converter is
In the information processing apparatus, the user operation prohibition information is recorded as configuration data of the second data format.

  Furthermore, in an embodiment of the information processing apparatus according to the present disclosure, the control unit includes, in addition to user operation prohibition information corresponding to reproduction data, application data information indicating an application range of the user operation prohibition information, the first data Obtained from the playback control file that is the format configuration data, the data conversion unit, along with the user operation prohibition information, applies the application data information indicating the application target of the user operation prohibition information to the configuration data of the second data format Record as.

  Furthermore, in one embodiment of the information processing apparatus according to the present disclosure, the data conversion unit executes a process of converting BDMV format data into MP4 format data, and the control unit is configured to play list files set in the BDMV format data. The user conversion prohibition information corresponding to the reproduction data is acquired from the data conversion unit, and the data conversion unit records the user operation prohibition information in the user operation prohibition information storage box set in the MP4 format data.

  Furthermore, in one embodiment of the information processing apparatus according to the present disclosure, the data conversion unit executes a process of converting BDMV format data into MP4 format data, and the control unit is configured to play list files set in the BDMV format data. The user operation prohibition information corresponding to the reproduction data and the application data information indicating the application range of the user operation prohibition information are acquired, and the data conversion unit determines the user operation prohibition information and the application range of the user operation prohibition information. The indicated application data information is recorded in the user operation prohibition information storage box set in the MP4 format data.

  Furthermore, in one embodiment of the information processing apparatus according to the present disclosure, the data conversion unit, when the application data information indicating the application range of the user operation prohibition information is the entire storage data of the MP4 file generated in the format conversion, A user operation prohibition information storage box is set in the moov box, which is a metadata storage box corresponding to the entire data of the MP4 file, and the user operation prohibition information acquired from the playlist file is recorded.

  Furthermore, in one embodiment of the information processing apparatus according to the present disclosure, the data conversion unit is configured such that the application data information indicating the application range of the user operation prohibition information corresponds to the divided data stored in the MP4 file generated in the format conversion. In the case of data, a user operation prohibition information storage box is set in a moof box, which is a metadata storage box corresponding to the fragment data of the MP4 file, and user operation prohibition information acquired from the playlist file is recorded.

  Furthermore, in one embodiment of the information processing apparatus according to the present disclosure, the data conversion unit is configured such that the application data information indicating the application range of the user operation prohibition information is in units of sample groups stored in the MP4 file generated in the format conversion. Sets a user operation prohibition information storage box in a sample group information box, which is a metadata storage box for each sample group of the MP4 file, and records user operation prohibition information acquired from the playlist file.

  Furthermore, in an embodiment of the information processing apparatus of the present disclosure, the control unit acquires the user operation prohibition information from an information recording medium on which conversion target data is recorded or from the outside via a communication unit.

  Furthermore, in one embodiment of the information processing apparatus according to the present disclosure, the control unit acquires a playlist file to be converted from an information recording medium on which BDMV format data is recorded, and acquires the identification information of the acquired playlist file on an external server And the user operation prohibition information corresponding to the playlist file is acquired from the external server.

  Furthermore, in an embodiment of the information processing apparatus according to the present disclosure, the data conversion unit converts the BDMV format data to generate a CFF file according to CFF (Common File Format).

  Furthermore, in an embodiment of the information processing apparatus according to the present disclosure, the information processing apparatus further includes a recording unit that records data after the data format conversion on the second information recording medium.

Furthermore, the second aspect of the present disclosure is:
A data conversion unit for performing format conversion from the first data format to the second data format;
A control unit that obtains information to be applied to the conversion process executed by the data conversion unit;
A recording unit that records the conversion data of the data conversion unit on an information recording medium;
The controller is
User operation prohibition information corresponding to reproduction data is acquired from a reproduction control file that is constituent data of the first data format,
The data converter is
Setting the user operation prohibition information as configuration data of the second data format;
The recording unit is
The information recording apparatus records the second format data generated by the data converter on an information recording medium.

  Furthermore, in one embodiment of the information recording apparatus of the present disclosure, the data conversion unit executes a process of converting BDMV format data into MP4 format data, and the user operation prohibition information recorded in the playlist file of the BDMV format data Is recorded in the user operation prohibition information storage box set in the MP4 format data.

Furthermore, the third aspect of the present disclosure is:
It has an MP4 file that stores MP4 format data as recording data,
The MP4 file is
Including user operation prohibition information and data range information to which the user operation prohibition information is applied,
An information processing apparatus that executes the reproduction process of the MP4 file,
The information recording medium enables reproduction control to stop execution of processing for a user operation with reference to the user operation prohibition information and the data range information.

Furthermore, 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 conversion unit for performing format conversion from the first data format to the second data format;
A control unit that obtains information to be applied to the conversion process executed by the data conversion unit;
The control unit is
User operation prohibition information corresponding to reproduction data is acquired from a reproduction control file that is constituent data of the first data format,
The data converter is
In the information processing method of recording the user operation prohibition information as configuration data of the second data format.

Furthermore, the fifth aspect of the present disclosure is:
A program for executing information processing in an information processing apparatus;
The information processing apparatus includes:
A data conversion unit for performing format conversion from the first data format to the second data format;
A control unit that obtains information to be applied to the conversion process executed by the data conversion unit;
The program is stored in the control unit.
User operation prohibition information corresponding to reproduction data is acquired from a reproduction control file that is constituent data of the first data format,
In the data converter,
A program for recording the user operation prohibition information as configuration data of the second data format.

  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.

  Other 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 an embodiment of the present disclosure, a configuration in which user operation prohibition information defined in BDMV data is acquired and recorded in an MP4 file is realized.
Specifically, in the process of converting the BDMV format data to the MP4 format data, the user operation prohibition information corresponding to the playback data is acquired from the playlist file set in the BDMV data, and the user operation prohibition information is set in the MP4 file. Record in the user operation prohibition information storage box. The recording position of the user operation prohibition information storage box is changed in accordance with the application range of the user operation prohibition information, and the user operation prohibition information can be recorded in the entire MP4 file storage data, fragment units, and sample group units.
With this configuration, a configuration is realized in which user operation prohibition information defined in the BDMV data is acquired and recorded in the MP4 file.
Note that the effects described in the present specification are merely examples and are not limited, and may have additional effects.

FIG. 25 is a diagram for describing a configuration example of an information processing device. It is a figure explaining the structure of the data conversion part of information processing apparatus. It is a figure explaining the example of a directory structure of the data recorded on a medium according to a BDMV format. It is a figure explaining the response | compatibility with the play list prescribed | regulated in a BDMV format, and reproduction | regeneration data. It is a figure explaining the structural example of MPEG2TS (transport stream) as a data structure of a clip AV stream (Clip AV Stream) file. It is a figure explaining an MP4 file format. It is a figure explaining the structure of CFF (Common File Format). It is a figure explaining the user operation prohibition information recorded on the playlist file of BDMV format data. It is a figure explaining the example of a recording of the sample group information box set to MP4 (CFF) file. It is a figure explaining the example which set the user operation prohibition information storage box (umask box) to the sample group information box. It is a figure explaining the example of the recording data with respect to a user operation prohibition information storage box (umask box). It is a figure explaining the example of a conversion process from BDMV format data to an MP4 (CFF) file. It is a figure explaining the example of a conversion process to the CFF file which set the user operation prohibition information storage box (umask box) of the sample unit. It is a figure explaining the example which set the user operation prohibition information storage box (umask box) which recorded the user operation prohibition information per MP4 (CFF) file. It is a figure explaining the example which set the user operation prohibition information storage box (umask box) which recorded the user operation prohibition information per fragment. It is a figure explaining the example of a format conversion process to the CFF file which set the user operation prohibition information storage box (umask box) which recorded the user operation prohibition information per MP4 (CFF) file. It is a figure explaining the example of a format conversion process to the CFF file which set the user operation prohibition information storage box (umask box) which recorded the user operation prohibition information per fragment. FIG. 10 is a diagram illustrating a flowchart for explaining a format conversion processing sequence executed by the information processing apparatus. It is a figure explaining the flow of data and a process in information processing apparatus at the time of format conversion process execution. It is a figure explaining the example of a process which acquires user operation prohibition information from an external server.

Hereinafter, details of the information processing apparatus, the information recording apparatus, the information recording medium, the information processing method, and the program of the present disclosure will be described with reference to the drawings. The description will be made according to the following items.
1. 1. Outline of configuration and processing of information processing apparatus 2. About the BDMV format About MP4 file format 4. Prescribed configuration of user operation prohibition information in BDMV format data Example of recording process of user operation prohibition information in MP4 (CFF) format 5-1. Example in which user operation can be prohibited in sample group units 5-2. 5. Embodiment in which user operation can be prohibited in MP4 file unit or fragment unit 6. Sequence of format conversion processing executed by information processing apparatus 7. Example of processing for acquiring and recording playback control information from an external server Summary of composition of this disclosure

[1. Overview of information processing device configuration and processing]
First, an outline of a configuration and processing of an information processing apparatus according to an embodiment of the present disclosure will be described.
FIG. 1 is a block diagram illustrating a configuration example of an information processing apparatus 100 according to an embodiment of the present disclosure. The information processing apparatus 100 reads out data recorded on a first medium 110 that is an information recording medium such as a BD (Blu-ray (registered trademark) Disc), for example, and a second medium 120 that is an information recording medium such as a flash memory. So-called copy processing is performed.
Alternatively, a process of recording data input via the communication unit 103 on the second medium 120 such as a rush memory is performed.

  Note that the data format of data input via the first medium 110 or the communication unit 103 is a first format, and the format of data recorded on the second medium 120 is a second format.

  The information processing apparatus converts the first format data into the second format data when recording the first format data input via the first medium 110 or the communication unit 103 in the second medium 120 such as a flash memory. The process to do is performed.

In the following embodiment, the format of data input from the first medium 110 or the communication unit 103 is described as a BDMV format, and the recording format of the second medium is described as an MP4 format.
The information processing apparatus 100 executes format conversion from the BDMV format to the MP4 format during data recording processing on the second medium 120.

  As shown in FIG. 1, the information processing apparatus 100 includes a control unit 101, an input unit 102, a communication unit 103, a storage unit 104, an output unit 105, a first media IF (interface) 106, a data buffer 107, and a data conversion unit 108. And a second media IF 109.

  The control unit 101 performs control of data processing executed in the information processing apparatus 100 such as data recording / playback using media and data copy processing between media. These controls are performed according to a program stored in the storage unit 104, for example. Done.

The input unit 102 is an input unit such as a switch, button, or touch panel that can be operated by the user, and is an input unit that inputs instructions for various processes such as reproduction, copying, and recording.
Further, the input unit 102 may have a configuration including an imaging unit that inputs an image or sound to be recorded on a medium, and a microphone.
The communication unit 103 communicates with, for example, an external server or an external device, and is used for various communication processes such as acquisition of recording data for media, control information related to the recording data, or permission information for copy processing.

The storage unit 104 is used as a storage area for a program executed by the control unit 101, a parameter area used for program execution, and a work area during program execution.
Specifically, it is also used as an area for temporarily storing data read from the first medium 110 when data is recorded on the second medium 120 or data input via the communication unit 103.
The storage unit 104 is configured by, for example, a RAM, a ROM, and the like.
The output unit 105 is used for output processing of reproduction data from the medium, and further used for displaying the progress of data recording processing on the second medium 120 and displaying messages to the user, and is configured by a display, a speaker, and the like.

  The first media interface (IF) 106 is a data recording / reproducing unit that accesses the first medium 110 such as a BD (Blu-ray (registered trademark) Disc) and performs data recording and data reading on the first medium 110. A functional interface.

The data buffer 107 is a buffer that temporarily stores read data from the first medium 110 and data input from the communication unit 103. For example, data to be recorded on the second medium 120 is temporarily stored.
The data conversion unit 108 records data recorded in the first medium 110 or data in the first format, which is the format of data input via the communication unit 103, on the second medium 120 that is the data recording destination. A format conversion process for converting to a second format which is a format is executed. The detailed configuration and processing of the data converter 108 will be described later.

  The second media interface (IF) 109 is an interface that functions as a data recording / reproducing unit that accesses the second medium 120 and performs data recording or reading processing on the second medium 120.

As described above, the information processing apparatus 100 performs processing for recording the first format data input via the first medium 110 or the communication unit 103 in the second medium 120 such as a flash memory. In this process, a process for converting the first format data into the second format data is performed.
The first format is BDMV format data, for example, and the second format is MP4 format data.

  Note that the information processing apparatus 100 acquires only data that cannot be acquired from the first medium 110 from an external server via the communication unit 103, and acquires data read from the first medium 110 and the communication unit 103. You may perform the process which records received data on the 2nd medium 120 collectively.

In the configuration shown in FIG. 1, the first medium 110 is, for example, a BD (Blu-ray (registered trademark) Disc). The second medium 120 is a flash memory such as an SD card, for example.
The first medium 110 and the second medium 120 are not limited to the above combinations, and various combinations are possible.

Next, the detailed configuration of the data conversion unit 108 will be described with reference to FIG.
As shown in FIG. 2, the data conversion unit 108 includes a data analysis unit 151, an image data conversion unit 152, an audio data conversion unit 153, a caption data conversion unit 154, and a multiplexing process execution unit 155.

The data analysis unit 151 is based on read data from the first medium 110 stored in the data buffer 107 or an identifier (PID: program ID) set in data (packet) input via the communication unit 103. Each data (packet)
image data,
Audio data,
Subtitle data,
Classify into these three types of data.

  The data analysis unit 151 outputs image data to the image data conversion unit 152, outputs audio data to the audio data conversion unit 153, and outputs caption data to the caption data conversion unit 154.

  The image data conversion unit 152, the audio data conversion unit 153, and the caption data conversion unit 154 are a first format that is a data format of input data, for example, a second format for recording BDMV format data on the second medium 120, specifically, For example, executes processing for conversion into format data in the MP4 format.

That is, the image data conversion unit 152 generates MP4 format image data, which is a data recording format for the second medium 120, and outputs the image data to the multiplexing processing execution unit 155.
The audio data conversion unit 153 generates MP4 format audio data and outputs the audio data to the multiplexing process execution unit 155.
The caption data conversion unit 154 generates MP4 format caption data and outputs it to the multiplexing process execution unit 155.

Note that each of the image data conversion unit 152, the audio data conversion unit 153, and the caption data conversion unit 154 performs necessary decryption processing, encoding processing, encryption processing, and the like in the format conversion processing of each data.
That is, each of the image data conversion unit 152, the audio data conversion unit 153, and the caption data conversion unit 154 performs a decoding process according to the encoding mode (for example, MPEG2) of the first format (for example, BDMV) that is the input data. The encoding process according to the encoding mode of the second format (for example, MP4) which is the recording format for the second medium 120 is executed.

When the input data is encrypted data, each of the image data conversion unit 152, the audio data conversion unit 153, and the caption data conversion unit 154 executes the decoding process and performs format conversion using the decoded data. .
Further, when it is necessary to use the recording data for the second medium 120 as encrypted data, each of the image data conversion unit 152, the audio data conversion unit 153, and the caption data conversion unit 154 follows a predetermined encryption algorithm. Perform encryption processing.

The multiplexing processing unit 155
(A) second format (MP4) format image format data generated by the image data generation unit 152;
(B) audio format data in the second format (MP4) generated by the audio data generator 153;
(C) Subtitle format data in the second format (MP4) generated by the subtitle data generation unit 154,
(D) data extracted from, for example, a reproduction control information file stored in the storage unit 104;
Multiplex processing of each of these data is executed to generate recording data in the second format (MP4) format.

  The data generated by the multiplexing process execution unit 155 is recorded on the second medium 120 via the second media interface 109.

  As described above, the information processing apparatus 100 uses the second format, which is the recording format of the second medium 120, of the recording data of the first medium 110 or the data of the first format (BDMV format) input via the communication unit 103. A process of converting to the format (MP4) and recording on the second medium 120 is executed.

  Hereinafter, the BDMV format, which is the format of the content that is the copy source, and MP4, which is the recording format for the copy destination medium, will be sequentially described.

[2. About BDMV format]
The BDMV format will be described with reference to FIG.
FIG. 3 is a diagram showing a directory of recording data according to the BDMV format recorded on a ROM-type BD (Blu-ray (registered trademark) Disc) which is the first medium 110, for example.

As shown in FIG. 3, the directory is divided into a management information setting unit 171 (AACS directory) and a data unit 172 (BDMV directory).
The management information setting unit 171 (AACS directory) stores a CPS unit key file and a usage control information file that are data encryption keys.

On the other hand, under the BDMV directory of the data part 172,
Index files,
Playlist files,
Clip information file,
Clip AV stream file,
BDJO file,
For example, these files are recorded.

The index file stores title information as index information applied to the reproduction process.
The playlist file is a file that defines the playback order of contents in accordance with the program information of the playback program specified by the title, and has playback position information and designation information for clip information.
The clip information file is a file specified by the playlist file, and has reproduction position information of the clip AV stream file and the like.
The clip AV stream file is a file storing AV stream data to be reproduced.
The BDJO file is a file that stores execution control information of a file that stores JAVA (registered trademark) programs, commands, and the like.

The sequence in which the information processing apparatus reproduces the content recorded on the information recording medium is as follows.
(A) First, a specific title is designated from the index file by the reproduction application.
(B) A reproduction program associated with the designated title is selected.
(C) A playlist that defines the playback order of contents is selected according to the program information of the selected playback program.
(D) The AV stream or the command as the actual content data is read out by the clip information defined in the selected playlist, and the AV stream is reproduced and the command is executed.

FIG. 4 shows the following data recorded on the first medium 110:
Playlist files,
Clip information file,
Clip AV stream file,
It is a figure explaining the correspondence of these data.

  An AV stream composed of image and audio data as actual reproduction target data is recorded as a clip AV stream (Clip AV Stream) file, and a playlist (PlayList) is used as management information and reproduction control information file of these AV streams. A file and a clip information file are defined.

These multiple categories of files are shown in FIG.
A playlist layer including a playlist (PlayList) file,
A clip layer consisting of a clip AV stream (Clip AV Stream) file and a clip information (Clip Information) file,
It can be divided into these two layers.

Note that one clip AV stream (Clip AV Stream) file is associated with one clip information (Clip Information) file, these pairs are considered as one object, and these are collectively referred to as a clip (Clip). There is also.
Detailed information of data included in the clip AV stream file, for example, management information such as an EP map in which I picture position information of MPEG data is recorded is recorded in the clip information file.

  A clip AV stream (Clip AV Stream) file stores data in which MPEG2 TS (transport stream) is arranged in accordance with a BDMV format specified structure. Details of this configuration will be described later with reference to FIG.

  In addition, in the clip information (Clip Information) file, for example, the data position of the byte string data of the clip AV stream file and the playback time such as the playback start point when expanded on the time axis (entry point: EP), etc. The management information for acquiring the reproduction start position of the data stored in the clip AV stream file, such as the corresponding data such as the position, is stored.

  For example, when a time stamp indicating the playback time elapsed position from the start point of the content is given, the clip information file is referred to, and the data read position of the clip AV stream file, that is, the address as the playback start point is acquired. Is possible.

The playlist (PlayList) file has designation information of a playback section for playable data included in a clip (= clip information file + clip AV stream file) layer.
In the playlist (PlayList) file, one or more play items (PlayItem) are set, and each play item is a playback section for playable data included in a clip (= clip information file + clip AV stream file) layer. Specified information.

  A clip AV stream (Clip AV Stream) file storing actual image and audio data to be reproduced has a MPEG2 transport stream (TS) file structure as shown in FIG. 5, for example.

The MPEG2 transport stream file structure has the following settings.
1) An MPEG2 transport stream file is composed of an integer number of aligned units.
2) The size of the aligned unit is 6 kB (= 6144 bytes (2048 × 3 bytes)).
3) The aligned unit starts from the first byte of the source packet.
4) The source packet is 192 bytes long. One source packet includes a TP_extra_header and a transport packet (TS packet). The TP_extra_header is 4 bytes long, and the transport packet (TS packet) is 188 bytes long.
5) A transport packet (TS packet) has a header (TP header) and a payload portion. The payload of one TS packet stores encoded data of any one type of data such as an image and sound.
6) A PID (program ID) indicating the data type of the payload is recorded in the header (TP header) of the transport packet (TS packet).
7) The payload of a transport packet (TS packet) is composed of a packet (packeted elementary stream (PES)) that stores an elementary stream (ES) that is encoded data such as an image or sound, a PES header, and the like. The
8) In the PES header, a presentation time stamp (PTS) indicating playback time information of the elementary stream (ES) stored in the subsequent PES packet is recorded.

[3. About MP4 file format]
Next, an outline of the MP4 file format will be described with reference to FIG.
In FIG. 6, the following two examples are shown as examples of the MP4 file format defined by ISO / IECC 14496-14.
(A) Fragmented (split type) MP4 file (fragmented movie)
(B) Non-fragmented MP4 file (Non-fragmented movie)
These MP4 files shown in FIGS. 6A and 6B are files set as one processing unit in data recording or reproduction processing according to the MP4 format.

(A) A fragmented (divided type) MP4 file (fragmented movie) is a file format in which data such as images and sounds, which are reproduction target data, is divided and stored for each reproduction data within a predetermined time.
(B) A non-fragmented (non-segmented) MP4 file (Non-fragmented movie) is a file format in which data such as images and sounds that are reproduction target data is stored without being divided.

In the MP4 file, an area is set in units of boxes, and data defined in units of boxes is stored in each box.
Each box has areas of a box size (box-size), a box type (box-type), and box data (box-data).
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.

The following types of boxes are set in the fragmented (split type) MP4 file shown in FIG.
moov box,
trak box,
moof box,
traf box,
mdat box,
Each box above is set.

Actual data that is reproduction target data such as images, sounds, and captions is divided into mdat boxes and stored.
Further, each mdat box is associated with a moof box, and the moof box stores metadata such as attribute information and reproduction control information related to the divided actual data stored in the mdat box associated with the moof box. To do.

  The fragmented (divided type) MP4 file shown in FIG. 6 (a) has a large number of pieces of real data (mdat) that is divided data of reproduction target data and metadata corresponding to the divided real data (moof) as one set data. It has a configuration in which set data is stored, and metadata regarding all of the plurality of stored set data is stored in a moov box.

A traf box is set in the metadata (moof) corresponding to the divided actual data.
The traf box stores reproduction sequence information of associated real data (mdat) and the like.

The moov box is a box set as a storage area for metadata such as reproduction control information of data stored in the entire MP4 file.
One or more trak boxes are set in the moov box. The trak box can be set for each data type such as image, sound, subtitle, etc., and stores reproduction sequence information of each data.

If the playback data stored in the MP4 file includes a plurality of different image data, such as HD images, 4K images, etc., it is possible to set individual trak boxes according to these image types. .
Also, if the stored audio data of the MP4 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.

(B) A non-fragmented (non-segmented) MP4 file (Non-fragmented movie) is a file format in which data such as images and sounds that are reproduction target data is stored without being divided.
The following types of boxes are set in the non-fragmented (non-divided) MP4 file shown in FIG.
moov box,
trak box,
mdat box,
Each box above is set.

The mdat box stores actual data to be reproduced.
The moov box stores metadata set corresponding to the actual data (mdat) that is the reproduction target data, for example, metadata including the attributes of the reproduction target real data (mdat) and the reproduction control information.
The trak box set in the moov box stores reproduction sequence information of actual data (mdat).

  Similar to the above-described (a) fragmented (divided) MP4 file, one or more trak boxes are set in the moov box set in (b) non-fragmented (non-divided) MP4 file. Each trak box is set for each data type, such as image, audio, and caption.

FIG. 6 shows a basic configuration example of the MP4 file format.
DECE (Digital Entertainment Content Ecosystem), a standardization organization for the MP4 format, has standardized CFF (Common File Format) as a new MP4-based file format. This CFF will be described with reference to FIG.

  The CFF (Common File Format) shown in FIG. 7 basically has the same data configuration as that of the fragmented movie MP4 described with reference to FIG.

That is, in the CFF (Common File Format) file shown in FIG. 7, the following boxes are set as in the fragmented (split type) MP4 file shown in FIG.
moov box,
trak box,
moof box,
traf box,
mdat box,
Each box above is set.

The data stored in each box is almost the same as the fragmented (split type) MP4 file in FIG.
However, in CFF, each mdat box has a restriction that only one type of data is stored.
That is, in each mdat box,
(A) Image (b) Audio (c) Subtitle One kind of data is stored. There is a restriction that the above data (a) to (c) should not be mixed and stored.

When a plurality of different image data such as HD images, 4K images, etc. are included in the CFF file, these different images are stored in different mdat boxes.
Similarly, different audio data such as Japanese audio and English audio are stored in individual mdat boxes, and Japanese subtitles and English subtitles are also stored in different mdat boxes.

In the general fragmented (divided) MP4 file shown in FIG. 6A, different types of data such as images, audio, and subtitles are stored in the mdat box set as a storage box for one divided data (fragment). It was allowed to store a mixture.
However, in the CFF (Common File Format) shown in FIG. 7, there is a restriction that only one type of data can be stored in one mdat box.

That is, only one kind of data of image, sound, or subtitle is individually stored in each mdat box.
Accordingly, the moof box, which is a metadata storage area corresponding to the mdat box, is also set to store metadata set corresponding to one type of data of image, audio, and caption.

The data stored in the mdat box, which is the data part of the MP4 file format, is divided into samples as basic data units.
In CFF (Common File Format), a set of only image samples, a set of only audio samples, a set of only subtitle samples, or a set of data samples of the same type is stored in one mdat box. .

Furthermore, the CFF defined by DECE also defines the coding mode (codec) and data format of images, audio, and subtitles that are allowed to be stored in the CFF file. Examples of data formats that are allowed to be stored in the CFF file include the following data formats.
Image (Video): AVC, HEVC
Audio (Audio): MPEG4-AAC, Dolby, AC-3
Subtitle: SMPTE Timed Text (SMPTE-TT)

[4. Regarding the prescribed configuration of user operation prohibition information in BDMV format data]
As one of the problems when BDMV format data is converted to MP4 format such as CFF and recorded on the second medium 120, user operation prohibition information (UO mask) which is one of reproduction control information recorded in the BDMV format. : User Operation mask).

A playlist file, which is a BDMV format configuration file, records playback control information for images and audio data stored in a clip AV stream file as described above.
One example of reproduction control information recorded in the playlist file is user operation prohibition information (UO mask).
This is information for prohibiting a specific user operation on reproduction data in a specific range.

A data example of the user operation prohibition information (UO mask) recorded in the playlist file will be described with reference to FIG.
FIG. 8 is a diagram illustrating an example of the syntax of the user operation prohibition information table (UO mask table) recorded in the playlist file.

The user operation prohibition information table (UO mask table) is a table that defines user operations that are prohibited in, for example, a playlist file unit or a play item unit set in the playlist file.
In this table, for example, the following reproduction processing prohibition information for the reproduction data by a specific play item is recorded.
Prohibit fast-forward playback,
Prohibit rewind playback,
Prohibit skip playback,
Prohibition of pause playback (pause playback)
These are examples of user operations to be prohibited, and various user operation information to be prohibited is recorded in addition to these.

The player (playback application) that plays back the BDMV format data does not accept the user operation prohibited in the table with reference to the user operation prohibition information table (UO mask table) shown in FIG. The control that does not execute is executed.
This user operation prohibition information is set for the purpose of, for example, reliably presenting the viewer with copyright information, warning messages, display scenes of prohibition items, and the like regarding playback content such as movies.

When playing back BDMV format data, playback control is performed according to the information defined in the user operation prohibition information table (UO mask table).
However, the MP4 format such as CFF does not clearly define an area in which user operation prohibition information recorded in the user operation prohibition information table (UO mask table) should be recorded.

  Therefore, when the BDMV format data is converted into an MP4 file such as CFF and recorded on the second medium 120, it becomes a problem how to reflect the user operation prohibition information recorded in the BDMV format data in the MP4 file. .

[5. Example of recording processing of user operation prohibition information in MP4 (CFF) format]
Hereinafter, the following two examples will be sequentially described as examples in which the user operation prohibition information recorded in the BDMV format data is reflected in the MP4 file.

1. 1. Example in which user operations can be prohibited in sample group units Example in which user operations can be prohibited in units of MP4 files or fragments

[5-1. Example in which user operations can be prohibited in sample group units]
First, an embodiment in which user operations can be prohibited in sample group units will be described.
As described above, sample unit data as a basic data unit is stored in the mdat box, which is a storage area for data to be reproduced in the MP4 format such as CFF. As described above with reference to FIG. 7, in CFF (Common File Format), one mdat box is either a set of only image samples, a set of only audio samples, or a set of only subtitle samples. A set of data samples of the same type is stored.

  For example, an image sample is a reproduced image for several seconds, that is, encoded image data corresponding to one to a plurality of reproduced image frames, an audio sample is encoded audio data corresponding to reproduced audio for several seconds, and a subtitle sample is equivalent to reproduced subtitles for several seconds Of the encoded subtitle data.

  As shown in FIG. 9, a sample table box (Sample Table Box) is recorded in the trak box of the moov box of the MP4 (CFF) file according to the MP4 format described with reference to FIGS.

The sample table box (Sample Table Box) is a box for recording information in units of samples, which are basic data units of reproduction data stored in an mdat box that is a reproduction target data storage box.
In the sample table box (Sample Table Box), for example, the following boxes are set.
(A) Sample Group Group Box (Sample To Group Box)
(B) Sample Group Description Box (Sample Group Description Box)

The sample group definition box (Sample To Group Box) is a box that stores definition information of the sample group to which each sample belongs, and is a box that records the number of samples included in the sample group and identification information of the sample group.
The sample group information box (Sample Group Description Box) is a box for recording attribute information (metadata) related to samples belonging to the sample group defined in the sample group definition box (Sample To Group Box).
For example, in the case of an image sample, attribute information such as image type (HD, 4K, etc.) resolution information is recorded.

As described above, in the MP4 format such as CFF, the sample group description box is defined as a box for recording attribute information (metadata) in units of sample groups.
In the present embodiment, a box for storing user operation prohibition information recorded in the BDMV format data as a new box in this sample group information box (Sample Group Description Box), that is,
User operation prohibition information storage box (umask box)
Set.

  FIG. 10 shows an example of a CFF file in which a user operation prohibition information storage box (umask Box) is set in the sample group information box (Sample Group Description Box).

  FIG. 10 is a diagram showing a detailed configuration of a sample table box (Sample Table Box) set in the trak box for each data type set in the moov box of the CFF file.

As described above, the sample table box is a box for recording information in units of samples, which are basic data units of reproduction data stored in the mdat box, which is a reproduction target data storage box.
Each of the following boxes is set in the sample table box (Sample Table Box).
(A) Sample Group Group Box (Sample To Group Box)
(B) Sample Group Description Box (Sample Group Description Box)

In the example shown in FIG. 10, in the sample group information box (Sample Group Description Box),
A user operation prohibition information storage box (umask box) is set.

In FIG.
User operation prohibition information storage box (umask box) 301,
User operation prohibition information storage box (umabox) 302,
These two umask boxes are shown.
These two umask boxes are user operation prohibition information storage boxes corresponding to different sample groups.

Specifically, for example, the following settings are made.
A user operation prohibition information storage box (umabox) 301 is a box in which user operation prohibition information for samples 0001 to 0020 included in the sample group A is recorded.
A user operation prohibition information storage box (umabox) 302 is a box in which user operation prohibition information for samples 0021 to 0050 included in the sample group B is recorded.
The sample group definition information of these sample groups A and B, that is, information on the sample group such as which sample belongs to which sample group is recorded in a sample group definition box (Sample To Group Box).

As shown in FIG. 10, the recorded data of the user operation prohibition information storage box (umask box) 301 is the following data.
forward_play_mask = 1b
backward_play_mask = 1b
These pieces of user operation prohibition information mean that fast-forward playback and rewind playback are prohibited during playback of samples belonging to the sample group A corresponding to the user operation prohibition information storage box (umabox) 301.
Note that 1b means that the value of the bit value is [1].

Also, as shown in FIG. 10, the recorded data of the user operation prohibition information storage box (umabox) 302 is the following data.
forward_play_mask = 0b
backward_play_mask = 0b
These means that fast-forward playback and rewind playback are permitted during playback of a sample belonging to the sample group B corresponding to the user operation prohibition information storage box (umabox) 301.
Note that 0b means that the bit value is [0].

That is, bit value = 1 means prohibition, and bit a = 0 means permission.
This bit setting is an example, and other bit settings may be used.
In this embodiment, if a bit value = 1 is set in various prohibition information recorded in the user operation prohibition information storage box (usbox), it means that the user operation is prohibited, and the bit value = If 0 is set, it means that the user operation is permitted.

FIG. 11 shows an example of user operation prohibition information recorded in the user operation prohibition information storage box (umabox Box). For example, the following user operation prohibition information is recorded in the umask box.
(1) chapter_search_mask
(2) time_search_mask
(3) skip_to_next_point_mask
(4) skip_back_to_previous_point_mask
(5) forward_play_mask
(6) backward_play_mask

(1) chapter_search_mask is a field for recording setting information indicating whether to prohibit or permit chapter search processing in the playback processing of samples belonging to the sample group associated with this umask box. = 1, set bit value = 0 to allow.
(2) time_search_mask is a field for recording setting information for prohibiting or permitting time search processing in the reproduction processing of samples belonging to the sample group associated with this umask box. = 1, set bit value = 0 to allow.

(3) skip_to_next_point_mask is a field for recording setting information indicating whether skip reproduction processing is prohibited or permitted in reproduction processing of samples belonging to the sample group associated with this umask box. = 1, set bit value = 0 to allow.
(4) skip_back_to_previous_point_mask is a field for recording setting information indicating whether or not skip back reproduction processing is prohibited in the reproduction processing of samples belonging to the sample group associated with this umask box. Value = 1, bit value = 0 is set to permit.

(5) The forward_play_mask is a field for recording setting information indicating whether or not fast-forward playback processing is prohibited in the playback processing of samples belonging to the sample group associated with this umask box. = 1, set bit value = 0 to allow.
(6) Backward_play_mask is a field for recording setting information for prohibiting or permitting rewind playback processing in the playback processing of samples belonging to the sample group associated with this umask box. Value = 1, bit value = 0 is set to permit.

Next, an example of data format conversion processing executed by the information processing apparatus 100 according to the present disclosure will be described.
The information processing apparatus according to the present disclosure executes a process of converting BDMV format data into MP4 format data, specifically, CFF (Common File Format) described with reference to FIGS.

An example of the format conversion process will be described with reference to FIG.
When the MP4 format data is generated by converting the BDMV format data, various settings can be made as to which data unit of the BDMV data generates one MP4 file.

  The MP4 file includes two types of MP4 files: a fragmented MP4 file described above with reference to FIG. 6 and a non-fragmented movie, and a CFF with constraints. Although there is a file, here, an example of processing when a CFF file is generated will be described.

Hereinafter, an example of processing for generating one CFF file in units of playlists defined as playback units in the BDMV format will be described.
In FIG.
(A) BDMV format data before format conversion (B) CFF file generated after format conversion The figure explaining these two correspondences is shown.

The BDMV format data before format conversion shown in (A) includes the following data.
(A1) One playlist # 1, which is subject to format conversion,
(A2) Clip information file (CI # 1) specified by playlist # 1;
(A3) Clip AV stream (ST # 1) designated as reproduction data by the clip information file (CI # 1),

  In the present embodiment, one playlist set in the BDMV format, and playback control information and playback data used by the playlist are used as format conversion processing units, and one MP4 file for each processing unit, that is, Then, the CFF file shown in FIG.

In this format conversion, the component data of the clip AV stream (ST # 1) as reproduction target data is divided and stored in a plurality of mdat boxes as reproduction target data storage units set in the MP4 file.
Note that when this data division storage process is performed, according to the CFF file specification, each mdat stores only one type of data of image audio and subtitles individually.

Each data of the playlist # 1 and the clip information file (CI # 1) is stored in the moov box and moof box which are metadata storage sections of the MP4 file (CFF).
Control information applied only to the data stored in each mdat box is stored in a moof box associated with each mdat box, and control information related to data stored in a plurality of mdat boxes is stored in a moov box.
By such processing, the BDMV format data is converted into MP4 format (CFF) data to generate one CFF file.

FIG. 13 shows an example in which a user operation prohibition information storage box (umask Box) is set as a configuration example of a CFF file generated by format conversion.
A sample table box (Sample Table Box) is recorded in the trak box for each data type set in the moov box of the CFF file.
Each of the following boxes is set in the sample table box (Sample Table Box).
(A) Sample Group Group Box (Sample To Group Box)
(B) Sample Group Description Box (Sample Group Description Box)
Furthermore, in the sample group information box (Sample Group Description Box),
A user operation prohibition information storage box (umabox) is recorded.

For example, as user operation prohibition information corresponding to one play item # 11 constituting a playlist file included in BDMV format data which is format conversion target data,
(A) Fast forward playback prohibited (forward_play_mask = 1b)
(B) Rewind playback prohibition (backward_play_mask = 1b)
It is assumed that such user operation prohibition information is recorded.
These pieces of information are recorded as the recording information of the playlist file described above with reference to FIG.

In this case, the information processing apparatus that performs MP4 (CFF) format conversion from the BDMV format analyzes the playlist file,
(A) Fast forward playback prohibited (forward_play_mask = 1b)
(B) Rewind playback prohibition (backward_play_mask = 1b)
The user operation prohibition information is acquired, and the prohibition information is recorded in the user operation prohibition information storage box (umask Box) of the CFF file that is the generated file after the format conversion.

Along with the recording process of the user operation prohibition information for the user operation prohibition information storage box (umask box), a set of samples to which the prohibition information is applied is defined as a new sample group, and the definition information of the sample group is Record in the Sample To Group Box.
Specifically, information indicating the range of samples to which the user operation prohibition information recorded in the user operation prohibition information storage box (umask Box) is applied is recorded in the sample group definition box (Sample To Group Box).
By executing these processes, a CFF file is generated and recorded on the second medium 120.

A player (playback application) that plays back the CFF format data performs playback processing with reference to the information recorded in the sample table box shown in FIG.
In this playback process, if user operation prohibition information is recorded in the user operation prohibition information storage box (umask Box) of the sample group description box, playback control is performed to prohibit the operation.

  In this process, the player (playback application) refers to a sample group definition box (Sample To Group Box) and a sample to which the user operation prohibition information recorded in the user operation prohibition information storage box (umask Box) is applied. The control for prohibiting the user operation is executed only for the sample range to be applied.

In this way, the user operation prohibition information storage box (umask Box) is set in the MP4 (CFF) file, and the user operation prohibition information recorded in the BDMV format data is recorded in this umask box.
With this setting, it is possible to similarly prohibit the user operation, which was prohibited when reproducing the BDMV format data, in the MP4 (CFF) reproduction process after the format conversion.

[5-2. Example in which user operation can be prohibited in MP4 file unit or fragment unit]
Next, as another embodiment for reflecting the user operation prohibition information recorded in the BDMV format data to the MP4 file, an embodiment in which user operation can be prohibited in units of MP4 (CFF) files or fragments. Will be described.

In the embodiment described above, user operation prohibition information is set in units of sample groups.
In the embodiment described below, it is possible to prohibit user operations not in units of sample groups but in whole reproduction data stored in MP4 (CFF) files or in units of fragments defined in MP4 (CFF) files. This is an example.
Note that a fragment is divided data of MP4 file storage data set in a fragmented (split type) MP4 file, as described above with reference to FIG.

The fragmented (divided) MP4 file described with reference to FIG. 6A is a set data of actual data (mdat) that is divided data of reproduction target data and metadata (moof) corresponding to the divided actual data. As described above, a large number of set data is stored, and further, metadata regarding all of the stored plurality of set data is stored in the moov box.
The “fragment” described in the present embodiment refers to one piece of divided actual data included in one set data including the divided actual data (mdat) and metadata corresponding to the divided actual data (moof) shown in FIG. Means (mdat).

First, an embodiment in which a specific user operation can be prohibited with respect to the entire reproduction target data stored in the CFF file will be described with reference to FIG.
The CFF file shown in FIG. 14 is the fragmented (split type) MP4 file described above with reference to FIGS. 6A and 7.
The following types of boxes are set in the fragmented MP4 file.
moov box,
trak box,
moof box,
traf box,
mdat box,
Each box above is set.

Actual data that is reproduction target data such as images, sounds, and captions is divided into mdat boxes and stored.
Further, each mdat box is associated with a moof box, and the moof box stores metadata such as attribute information and reproduction control information related to the divided actual data stored in the mdat box associated with the moof box. To do.

  The fragmented (split type) MP4 file stores a large number of set data with the actual data (mdat) that is the divided data of the reproduction target data and the metadata (moof) corresponding to the divided actual data as one set data, , Metadata regarding all of the plurality of stored set data is stored in the moov box.

The moov box is a box set as a storage area for metadata such as reproduction control information of data stored in the entire MP4 file.
In the present embodiment, a user operation prohibition information storage box (umask box) 311 is recorded in this moov box.
This user operation prohibition information storage box (umabox) 311 is a box in which user operation prohibition information applied to the entire reproduction target data stored in the CFF file is recorded.

  For example, when the user operation prohibition information recorded in the playlist file selected as the conversion target from the BDMV format data is prohibition information corresponding to the entire reproduction data by the playlist file, as shown in FIG. 14, in the moov box , A user operation prohibition information storage box (umabox) 311 is recorded.

  Note that a movie header box (Movie Header Box (mvhd)) is defined in the moov box defined in the MP4 format, and a user operation prohibition information storage box (umask Box) 311 is set in the moov box, for example. Record as a box in mvhd.

FIG. 14 shows an example in which the following information is recorded in the user operation prohibition information storage box (umask box) 311.
(A) Fast forward playback prohibited (forward_play_mask = 1b)
(B) Rewind playback prohibition (backward_play_mask = 1b)
The recorded data in the user operation prohibition information storage box (umask box) 311 means that fast forward playback and rewind playback are prohibited during the playback processing of all data stored in the CFF file.

Next, with reference to FIG. 15, an embodiment in which a specific user operation can be prohibited in fragment units that are divided data stored in the CFF file will be described.
The CFF file shown in FIG. 15 shows the fragmented MP4 file described above with reference to FIGS. 6A and 7 as in FIG.
The following types of boxes are set in the fragmented MP4 file.
moov box,
trak box,
moof box,
traf box,
mdat box,
Each box above is set.

Actual data that is reproduction target data such as images, sounds, and captions is divided into mdat boxes and stored.
Further, each mdat box is associated with a moof box, and the moof box stores metadata such as attribute information and reproduction control information related to the divided actual data stored in the mdat box associated with the moof box. To do.

  The fragmented (split type) MP4 file stores a large number of fragment set data with the actual data (mdat) that is the divided data of the reproduction target data and the metadata (moof) corresponding to the divided actual data as one set data, Furthermore, it has the structure which stored the metadata regarding the whole several fragment set data stored in the moov box.

In this embodiment, user operation prohibition information storage boxes (umask boxes) 331 and 332 are recorded in a moof box which is a metadata storage box set corresponding to actual data (mdat) which is divided data of reproduction target data. To do.
These user operation prohibition information storage boxes (umask boxes) 331 and 332 are boxes in which user operation prohibition information applied to reproduction target data (mdat) stored in each fragment is recorded.

  For example, when the user operation prohibition information recorded in the playlist file selected as the conversion target from the BDMV format data is prohibition information corresponding to the reproduction data by one play item included in the playlist file, FIG. As shown, a user operation prohibition information storage box (umask box) 321 is recorded in the moof box.

  That is, the playback data of one play item included in the playlist file is recorded in the mdat box in the fragment set, and user operation prohibition information for the playback data recorded in the mdat box is displayed in the moof box of the fragment set. A prohibition information storage box (umask Box) 321 is recorded.

  Note that the movie header box (Movie Header Box (mfhd)) is specified in the moof box specified in the MP4 format, and the user operation prohibition information storage boxes (umask boxes) 331 and 332 are set in the moof box, for example. Record as a box in mfhd.

FIG. 15 shows an example in which the following information is recorded in the user operation prohibition information storage box (umask box) 331 set in the moof box in the fragment set 321.
(A) Fast forward playback prohibited (forward_play_mask = 1b)
(B) Rewind playback prohibition (backward_play_mask = 1b)
The recorded data in the user operation prohibition information storage box (umabox) 331 means that fast-forward playback and rewind playback are prohibited during playback processing of data stored in this fragment set.

In addition, an example is shown in which the following information is recorded in a user operation prohibition information storage box (umabox) 332 set in the moof box in the fragment set 322.
(A) Prohibit fast-forward playback (forward_play_mask = 0b)
(B) Rewind playback prohibition (backward_play_mask = 0b)
The recorded data in the user operation prohibition information storage box (umabox) 332 means that fast forward playback and rewind playback are permitted during the playback processing of the data stored in this fragment set.

  These two different pieces of information include, for example, two play items # 11 and # 12 in a playlist file in BDMV format data that is format conversion target data, and for data reproduced by each of these play items, This is information set in correspondence with a case where different user operation prohibition information is set.

For example, as user operation prohibition information corresponding to play item # 11,
(A) Fast forward playback prohibited (forward_play_mask = 1b)
(B) Rewind playback prohibition (backward_play_mask = 1b)
These pieces of user operation prohibition information are recorded.
On the other hand, as user operation prohibition information corresponding to play item # 12,
(A) Prohibit fast-forward playback (forward_play_mask = 0b)
(B) Rewind playback prohibition (backward_play_mask = 0b)
These pieces of user operation prohibition information are recorded.
These pieces of information are recorded as the recording information of the playlist file described above with reference to FIG.

In this case, the information processing apparatus that performs the MP4 (CFF) format conversion from the BDMV format analyzes the playlist file, and first stores the reproduction data corresponding to each play item into mdat of individual fragment sets.
Furthermore, the reproduction prohibition information corresponding to each play item is individually recorded in a user operation prohibition information storage box (umask Box) set in the moof box in each fragment set.

  Next, with reference to FIGS. 16 and 17, user operation prohibition information can be applied to the entire MP4 (CFF) file storage data as an example of data format conversion processing executed by the information processing apparatus 100 of the present disclosure. An example of CFF file generation and an example of CFF file generation in which user operation prohibition information can be applied in fragment units will be described.

First, an example of generating a CFF file in which user operation prohibition information can be applied to the entire MP4 (CFF) file storage data will be described with reference to FIG.
Hereinafter, an example of processing for generating one CFF file in units of playlists defined as playback units in the BDMV format will be described.
In FIG.
(A) Configuration of playlist of BDMV format data before format conversion (B) CFF file generated after format conversion FIG.

  In this example, one playlist set in the BDMV format, and playback control information and playback data used by the playlist are used as format conversion processing units, and one MP4 file, that is, CFF for each processing unit. Generate a file.

In this format conversion, the component data of the clip AV stream (ST # 1) as reproduction target data is divided and stored in a plurality of mdat boxes as reproduction target data storage units set in the MP4 file.
Note that when this data division storage process is performed, according to the CFF file specification, each mdat stores only one type of data of image audio and subtitles individually.

  Each data of the playlist file and the clip information file included in the BDMV format data is stored in the moov box and moof box which are metadata storage sections of the MP4 file (CFF).

  FIG. 16 shows an example in which a user operation prohibition information storage box (umask Box) is set in the moov box as a configuration example of a CFF file generated by format conversion.

  A movie header (mvhd) box is set in the moov box of the CFF file, and a user operation prohibition information storage box (umask Box) is recorded therein.

For example, as user operation prohibition information corresponding to playlist file # 1 included in BDMV format data which is format conversion target data,
(A) Fast forward playback prohibited (forward_play_mask = 1b)
(B) Rewind playback prohibition (backward_play_mask = 1b)
It is assumed that such user operation prohibition information is recorded.
These pieces of information are recorded as the recording information of the playlist file described above with reference to FIG.

In this case, the information processing apparatus that performs MP4 (CFF) format conversion from the BDMV format analyzes the playlist file,
(A) Fast forward playback prohibited (forward_play_mask = 1b)
(B) Rewind playback prohibition (backward_play_mask = 1b)
These user operation prohibition information is acquired, and the user operation prohibition information storage box (umask Box) is set in the movie header (mvhd) box in the moov box of the CFF file that is the generated file after format conversion. Record prohibited information.
By executing these processes, a CFF file is generated and recorded on the second medium 120.

A player (playback application) that plays back the CFF format data performs playback processing with reference to the information recorded in the moov box shown in FIG.
In this playback process, if user operation prohibition information is recorded in the user operation prohibition information storage box (umabox), playback control is performed to prohibit the operation.

  In other words, the player (playback application) refers to the user operation prohibition information recorded in the user operation prohibition information storage box (umask Box) in the movie header (mvhd) box in the moov box during the playback process, and prohibits the user operation. It is determined that the information application target is the entire data stored in the CFF file, and control for prohibiting the user operation recorded in the user operation prohibition information storage box (umask Box) for all data is executed.

In this way, the user operation prohibition information storage box (umask Box) is set in the mvhd box of the moov box of the MP4 (CFF) file, and the user operation prohibition information recorded in the BDMV format data is recorded in this massk box.
With this setting, it is possible to similarly prohibit user operations in units of playlists that have been prohibited during playback of BDMV format data, even in MP4 (CFF) playback processing after format conversion.

Next, an example of generating a CFF file in which user operation prohibition information can be applied in fragment units will be described with reference to FIG.
The following example is also an example of processing for generating one CFF file in a playlist unit defined as a playback unit in the BDMV format.
In FIG.
(A) Configuration of playlist of BDMV format data before format conversion (B) CFF file generated after format conversion FIG.

  FIG. 17 shows an example in which a user operation prohibition information storage box (umask Box) is recorded in a moof box in each fragment set as a configuration example of a CFF file generated by format conversion.

  A movie header (mfhd) box is set in the moof box of each flag cement set of the CFF file, and a user operation prohibition information storage box (umask Box) is recorded therein.

  In the example shown in FIG. 17, two play items # 11 and # 12 are included in the playlist file # 1 included in the BDMV format data that is the format conversion target data, and the data reproduced by each of these play items is displayed. In this example, different user operation prohibition information is set.

As user operation prohibition information corresponding to play item # 11,
(A) Fast forward playback prohibited (forward_play_mask = 1b)
(B) Rewind playback prohibition (backward_play_mask = 1b)
These pieces of user operation prohibition information are recorded.
On the other hand, as user operation prohibition information corresponding to play item # 12,
(A) Prohibit fast-forward playback (forward_play_mask = 0b)
(B) Rewind playback prohibition (backward_play_mask = 0b)
These pieces of user operation prohibition information are recorded.
These pieces of information are recorded as the recording information of the playlist file described above with reference to FIG.

In this case, the information processing apparatus that performs the MP4 (CFF) format conversion from the BDMV format analyzes the playlist file, and first stores the reproduction data corresponding to each play item into mdat of individual fragment sets.
Furthermore, the reproduction prohibition information corresponding to each play item is individually recorded in a user operation prohibition information storage box (umask Box) set in the moof box in each fragment set.

The information processing apparatus that executes format conversion sets the fragment set 361 shown in the figure as an area for storing reproduction data corresponding to play item # 11 and its attribute information (metadata).
Further, in the user operation prohibition information storage box (umabox) 371 set in the fragment set 361, user operation prohibition information is as follows:
(A) Fast forward playback prohibited (forward_play_mask = 1b)
(B) Rewind playback prohibition (backward_play_mask = 1b)
The user operation prohibition information is recorded.

Furthermore, the information processing apparatus that executes format conversion sets the fragment set 362 shown in the figure as an area for storing reproduction data corresponding to play item # 12 and its attribute information (metadata).
Further, in the user operation prohibition information storage box (umask box) 372 set in the fragment set 362, user operation prohibition information,
(A) Prohibit fast-forward playback (forward_play_mask = 0b)
(B) Rewind playback prohibition (backward_play_mask = 0b)
The user operation prohibition information is recorded.
By executing these processes, a CFF file is generated and recorded on the second medium 120.

A player (playback application) that plays back the CFF format data performs playback processing with reference to the information recorded in the moof box shown in FIG.
In this playback process, if user operation prohibition information is recorded in the user operation prohibition information storage box (umabox), playback control is performed to prohibit the operation.

  In other words, the player (playback application) refers to the user operation prohibition information recorded in the user operation prohibition information storage box (umask Box) in the movie header (mfhd) box in the moof box during the playback process, and prohibits the user operation. It is determined that the information application target is a fragment unit, and the user operation recorded in the user operation prohibition information storage box (umask Box) in the fragment set is prohibited for the data (mdat) in the fragment set. Execute control.

As described above, the user operation prohibition information storage box (umask Box) is set in the moof box in the fragment set of the MP4 (CFF) file, and the user operation prohibition information recorded in the BDMV format data is recorded in this umask box.
With this setting, it is possible to similarly prohibit user operations in units of play items that were prohibited during playback of BDMV format data in MP4 (CFF) playback processing after format conversion.

[6. About format conversion processing sequence executed by information processing apparatus]
Next, a format conversion processing sequence executed by the information processing apparatus 100 will be described with reference to a flowchart shown in FIG.

The flowchart shown in FIG. 18 is executed according to a program stored in, for example, a storage unit under the control of the control unit of the information processing apparatus.
Processing of each step shown in the flow will be described sequentially.

(Step S101)
First, the information processing apparatus inputs BDMV format data to be converted from a medium or an external server, and acquires a playlist file to be converted from the input data.

(Step S102)
Next, the playlist file selected as the conversion target is analyzed, and user operation prohibition information (User Operation mask (UOmask)) is extracted from the recording information of the playlist file.

(Step S103)
In step S103, application range information of user operation prohibition information (User Operation mask (UOmask)) is extracted from the record information of the playlist file selected as the conversion target.

(Step S104)
Next, in step S104, the clip information file specified by the playlist file selected as the conversion target and the clip AV stream file associated with the clip information file are acquired.

(Step S105)
Next, in step S105, the image, audio, and subtitle data stored in the clip AV stream file is separated for each data type. This process is a process executed by the data analysis unit 151 of the data conversion unit 108 shown in FIG.

(Step S106)
Next, in step S106, the format conversion of each data of image, sound, and caption is executed to generate data to be stored in each mdat box of the MP4 (CCF) file.
This process is a process executed by the image data converter 152, the audio data converter 153, and the caption data converter 154 of the data converter 108 shown in FIG.

(Step S107)
Next, in step S107, the contents of the playlist file and the clip information file are analyzed, and data to be stored in the metadata recording box (moov / trak / moof / traf / umask) of the MP4 (CFF) file is generated.
This process is executed by the control unit 101 shown in FIG. 1 and the multiplexing processing unit 155 of the data conversion unit 108 shown in FIG.

(Step S108)
Next, in step S108, data is stored in a box (moov / trak / moof / traf / mdat / umask) of the MP4 (CFF) file to generate an MP4 (CFF) file.
This process is executed by the control unit 101 shown in FIG. 1 and the multiplexing processing unit 155 of the data conversion unit 108 shown in FIG.
The generated MP4 (CFF) file is recorded on the second medium, and the process is completed.

Note that in the processing of steps S107 to S108, the umask box, which is a user operation prohibition information storage box, is set and recorded in any of the following modes.
(1) When recording user operation prohibition information to be applied to the entire CFF file storage data, a user operation prohibition information storage box (umask box) is recorded in the mvhd box of the moov box.
(2) When recording user operation prohibition information to be applied to fragment-unit data set in a CFF file, a user operation prohibition information storage box (umask box) is recorded in the mfhd box of the moof box.
(3) When recording user operation prohibition information to be applied to a sample belonging to a newly defined sample group in the CFF file, a user operation prohibition information storage box (in the sample group information box of the sample table box in the trak box of the moov box) umask box).
In this case, sample group definition information including sample range information to which the user operation prohibition information recorded in the sample group information box is applied is recorded in the sample group definition box.

FIG. 19 is a diagram for explaining the flow of data generated in the format conversion process.
The example shown in FIG. 19 shows the data flow when reading BDMV format data recorded on the first medium 110, converting it to MP4 format data, and recording it on the second medium 120.

The playlist file selected from the first medium 110 is
Playlist file [00001. mpls]
And
First, the control unit 101 uses the playlist file [00001. mpls] is read from the first medium 110 and stored in the storage unit 104.

  Next, the control unit 101 uses the playlist file [00001. mpls] is extracted to extract user operation prohibition information and user operation prohibition information application range information. These pieces of information are stored in a playlist file [00001. mpls] and stored in the storage unit 104.

Further, the control unit 101 selects the playlist file [00001.0000] selected as the conversion target. mpls] and the clip AV stream file associated with the clip information file are acquired.
The acquired file is the following file.
Clip information file [00011. clpi]
Clip information file [00012. clpi]
Clip AV stream file [00011. m2ts]
Clip AV stream file [00012. m2ts]

Acquired
Clip information file [00011. clpi]
Clip information file [00012. clpi]
These files are stored in the storage unit 104.
Also,
Clip AV stream file [00011. m2ts]
Clip AV stream file [00012. m2ts]
These files are input to the data conversion unit 108 via the data buffer 107.

  The data conversion unit 108 separates each data of image, audio, and subtitle based on the PID (program ID) set in each packet of the clip AV stream file by the data analysis unit 151 shown in FIG. Are output to the image data conversion unit 152, the audio data conversion unit 153, and the caption data conversion unit 154.

The image data conversion unit 152, the audio data conversion unit 153, and the caption data conversion unit 154 execute format conversion of input data. That is, a process of converting the BDMV format data into MP4 (CFF) format data to be recorded on the second medium 120 is executed.
Note that each of the image data conversion unit 152, the audio data conversion unit 153, and the caption data conversion unit 154 performs necessary decryption processing, encoding processing, encryption processing, and the like in the format conversion processing of each data.

  The image data conversion unit 152, the audio data conversion unit 153, and the caption data conversion unit 154 generate MP4 format data and output the data to the multiplexing process execution unit 155.

The multiplexing processing unit 155
(A) second format (MP4) format image format data generated by the image data generation unit 152;
(B) audio format data in the second format (MP4) generated by the audio data generator 153;
(C) Subtitle format data in the second format (MP4) generated by the subtitle data generation unit 154,
(D) reproduction control data acquired from a reproduction control information file such as a playlist file or clip information file and stored in the storage unit 104;
Multiplex processing of each of these data is executed to generate recording data in the second format (MP4) format.

The reproduction control information file stored in the storage unit 104 is
Playlist file [00001. mpls],
Clip information file [00011. clpi]
Clip information file [00012. clpi]
These files.
Further, in addition to each of these files, the user operation prohibition information extracted from the playlist file and its application range information are recorded in the storage unit 104.

  The multiplexing processing unit 155 of the data converting unit 108 performs multiplexing processing of the MP4 format image, audio, and subtitle data and the data extracted from the playback control information file, and records in the second format (MP4) format. Generate data.

The multiplexing processing unit 155 of the data conversion unit 108 sets and records the umask box, which is a user operation prohibition information storage box, in any of the following modes.
(1) When recording user operation prohibition information to be applied to the entire CFF file storage data, a user operation prohibition information storage box (umask box) is recorded in the mvhd box of the moov box.
(2) When recording user operation prohibition information to be applied to fragment-unit data set in a CFF file, a user operation prohibition information storage box (umask box) is recorded in the mfhd box of the moof box.
(3) When recording user operation prohibition information to be applied to a sample belonging to a newly defined sample group in the CFF file, a user operation prohibition information storage box (in the sample group information box of the sample table box in the trak box of the moov box) umask box).
In this case, sample group definition information including sample range information to which the user operation prohibition information recorded in the sample group information box is applied is recorded in the sample group definition box.

  The generated MP4 (CFF) file is recorded on the second medium 120 via the second media interface 109.

In the example shown in FIG. 19, BDMV format data is recorded on the first medium 110, and data read from the first medium 110 is converted to generate an MP4 (CFF) file to be stored on the second medium 120. It has been described as an example of processing to be recorded.
However, as described above, the data subject to format conversion processing may be data input externally via the communication unit 103. In this case, all read data from the first medium 110 shown in FIG. The setting is input via the unit 103.

[7. Example of processing for acquiring and recording playback control information from an external server]
As described with reference to FIG. 19, data to be subjected to format conversion can be input from the outside via the first medium 110 such as a BD or the communication unit 103.

Furthermore, as another embodiment, the user operation prohibition information may be acquired from an external server.
That is, as illustrated in FIG. 20, the information processing apparatus 100 that executes the data recording process attaches the first medium 110 and further connects to the server 400.
The information processing apparatus 100 acquires the playlist file to be converted from the first medium 110 in which the BDMV format data is recorded, and transmits the identification information of the acquired playlist file to the server 400.

Based on the identification information of the playlist file, the server 400 acquires user operation prohibition information set corresponding to the playlist file from the storage unit and transmits it to the information processing apparatus 100. The user operation prohibition information provided by the server includes data coverage information for which user operations are prohibited.
Note that the server 400 holds user operation prohibition information corresponding to various playlists in the storage unit.

  The information processing apparatus 100 records the user operation prohibition information received from the server 400 in a user operation prohibition information storage box (umask box) newly set in the MP4 (CCF) file.

  With such a processing configuration, the information processing apparatus does not need to extract user operation prohibition information from the playlist file recorded on the first medium 110, and efficient processing is possible.

[8. 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 conversion unit that performs format conversion from the first data format to the second data format;
A control unit that obtains information to be applied to the conversion process executed by the data conversion unit;
The controller is
User operation prohibition information corresponding to reproduction data is acquired from a reproduction control file that is constituent data of the first data format,
The data converter is
An information processing apparatus that records the user operation prohibition information as configuration data in the second data format.

  (2) The control unit obtains application data information indicating an application range of the user operation prohibition information from the reproduction control file which is the configuration data of the first data format, together with the user operation prohibition information corresponding to the reproduction data. The data conversion unit records application data information indicating an application target of the user operation prohibition information as configuration data of the second data format in addition to the user operation prohibition information. Processing equipment.

  (3) The data conversion unit executes processing for converting BDMV format data into MP4 format data, and the control unit obtains user operation prohibition information corresponding to reproduction data from a playlist file set in the BDMV format data. And the said data conversion part is an information processing apparatus as described in said (1) or (2) which records the said user operation prohibition information in the user operation prohibition information storage box set to MP4 format data.

  (4) The data conversion unit executes processing for converting BDMV format data into MP4 format data, and the control unit includes user operation prohibition information corresponding to reproduction data from a playlist file set in the BDMV format data, The application data information indicating the application range of the user operation prohibition information is acquired, and the data converter sets the user operation prohibition information and the application data information indicating the application range of the user operation prohibition information in MP4 format data. The information processing apparatus according to any one of (1) to (3), wherein the information is recorded in the user operation prohibition information storage box.

  (5) When the application data information indicating the application range of the user operation prohibition information is the entire storage data of the MP4 file generated in the format conversion, the data conversion unit stores metadata corresponding to the entire data of the MP4 file. The information processing apparatus according to (4), wherein a user operation prohibition information storage box is set in a moov box that is a box, and user operation prohibition information acquired from the playlist file is recorded.

  (6) When the application data information indicating the application range of the user operation prohibition information is fragment data corresponding to the divided data stored in the MP4 file generated in the format conversion, the data conversion unit performs fragment data of the MP4 file. The information processing apparatus according to (4), wherein a user operation prohibition information storage box is set in a moof box, which is a metadata storage box corresponding to, and the user operation prohibition information acquired from the playlist file is recorded.

  (7) When the application data information indicating the application range of the user operation prohibition information is in units of sample groups to be stored in the MP4 file generated in the format conversion, the data conversion unit performs metadata in units of sample groups of the MP4 file. The information processing apparatus according to (4), wherein a user operation prohibition information storage box is set in a sample group information box that is a storage box, and user operation prohibition information acquired from the playlist file is recorded.

  (8) The information processing apparatus according to any one of (1) to (7), wherein the control unit acquires the user operation prohibition information from an information recording medium in which conversion target data is recorded or from outside via a communication unit. .

  (9) The control unit acquires a playlist file to be converted from an information recording medium in which BDMV format data is recorded, transmits identification information of the acquired playlist file to an external server, and receives the playlist from the external server. The information processing apparatus according to any one of (1) to (8), wherein user operation prohibition information corresponding to a file is acquired.

  (10) The information processing apparatus according to any one of (1) to (9), wherein the data conversion unit converts the BDMV format data to generate a CFF file according to a CFF (Common File Format).

  (11) The information processing apparatus according to any one of (1) to (10), further including a recording unit that records data after data format conversion on a second information recording medium.

(12) a data conversion unit that performs format conversion from the first data format to the second data format;
A control unit that obtains information to be applied to the conversion process executed by the data conversion unit;
A recording unit that records the conversion data of the data conversion unit on an information recording medium;
The controller is
User operation prohibition information corresponding to reproduction data is acquired from a reproduction control file that is constituent data of the first data format,
The data converter is
Setting the user operation prohibition information as configuration data of the second data format;
The recording unit is
An information recording apparatus for recording the second format data generated by the data converter on an information recording medium.

(13) The data converter is
Execute processing to convert BDMV format data to MP4 format data,
The information recording apparatus according to (12), wherein the user operation prohibition information recorded in the playlist file of the BDMV format data is recorded in the user operation prohibition information storage box set in the MP4 format data.

(14) It has an MP4 file storing MP4 format data as recording data,
The MP4 file is
Including user operation prohibition information and data range information to which the user operation prohibition information is applied,
An information processing apparatus that executes the reproduction process of the MP4 file,
An information recording medium that enables reproduction control to stop execution of processing for a user operation with reference to the user operation prohibition information and the data range information.

(15) An information processing method executed in the information processing apparatus,
The information processing apparatus includes:
A data conversion unit for performing format conversion from the first data format to the second data format;
A control unit that obtains information to be applied to the conversion process executed by the data conversion unit;
The control unit is
User operation prohibition information corresponding to reproduction data is acquired from a reproduction control file that is constituent data of the first data format,
The data converter is
An information processing method for recording the user operation prohibition information as configuration data in the second data format.

(16) A program for executing information processing in an information processing device,
The information processing apparatus includes:
A data conversion unit for performing format conversion from the first data format to the second data format;
A control unit that obtains information to be applied to the conversion process executed by the data conversion unit;
The program is stored in the control unit.
User operation prohibition information corresponding to reproduction data is acquired from a reproduction control file that is constituent data of the first data format,
In the data converter,
A program for recording the user operation prohibition information as configuration data of the second data format.

  The series of processing 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 can be installed on a recording medium such as a built-in hard disk.

  Note that 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, the configuration in which the user operation prohibition information defined in the BDMV data is acquired and recorded in the MP4 file is realized.
Specifically, in the process of converting the BDMV format data to the MP4 format data, the user operation prohibition information corresponding to the playback data is acquired from the playlist file set in the BDMV data, and the user operation prohibition information is set in the MP4 file. Record in the user operation prohibition information storage box. The recording position of the user operation prohibition information storage box is changed in accordance with the application range of the user operation prohibition information, and the user operation prohibition information can be recorded in the entire MP4 file storage data, fragment units, and sample group units.
With this configuration, a configuration is realized in which user operation prohibition information defined in the BDMV data is acquired and recorded in the MP4 file.

DESCRIPTION OF SYMBOLS 100 Information processing apparatus 101 Control part 102 Input part 103 Communication part 104 Storage part 105 Output part 106 1st media interface 107 Data buffer 108 Data conversion part 109 2nd media interface 110 1st medium 120 2nd medium 151 Data analysis part 152 Image Data conversion unit 153 Audio data conversion unit 154 Subtitle data conversion unit 155 Multiplexing processing unit 400 Server

Claims (16)

A data conversion unit for performing format conversion from the first data format to the second data format;
A control unit that obtains information to be applied to the conversion process executed by the data conversion unit;
The controller is
User operation prohibition information corresponding to reproduction data is acquired from a reproduction control file that is constituent data of the first data format,
The data converter is
An information processing apparatus that records the user operation prohibition information as configuration data in the second data format. The controller is
In addition to the user operation prohibition information corresponding to the reproduction data, the application data information indicating the application range of the user operation prohibition information is acquired from the reproduction control file that is the configuration data of the first data format,
The data converter is
The information processing apparatus according to claim 1, wherein application data information indicating an application target of the user operation prohibition information is recorded as configuration data of the second data format together with the user operation prohibition information. The data converter is
Execute processing to convert BDMV format data to MP4 format data,
The controller is
Obtaining user operation prohibition information corresponding to playback data from a playlist file set in BDMV format data,
The data converter is
The information processing apparatus according to claim 1, wherein the user operation prohibition information is recorded in a user operation prohibition information storage box set in MP4 format data. The data converter is
Execute processing to convert BDMV format data to MP4 format data,
The controller is
Obtaining user operation prohibition information corresponding to reproduction data and application data information indicating an application range of the user operation prohibition information from the playlist file set in the BDMV format data;
The data converter is
The information processing apparatus according to claim 1, wherein the user operation prohibition information and application data information indicating an application range of the user operation prohibition information are recorded in a user operation prohibition information storage box set in MP4 format data. The data converter is
When the application data information indicating the application range of the user operation prohibition information is the entire storage data of the MP4 file generated in the format conversion,
5. The information processing according to claim 4, wherein a user operation prohibition information storage box is set in a moov box, which is a metadata storage box corresponding to the entire data of the MP4 file, and user operation prohibition information acquired from the playlist file is recorded. apparatus. The data converter is
When the application data information indicating the application range of the user operation prohibition information is fragment data corresponding to the divided data stored in the MP4 file generated in the format conversion,
5. The information processing according to claim 4, wherein a user operation prohibition information storage box is set in a moof box that is a metadata storage box corresponding to fragment data of an MP4 file, and user operation prohibition information acquired from the playlist file is recorded. apparatus. The data converter is
When the application data information indicating the application range of the user operation prohibition information is a sample group unit stored in the MP4 file generated in the format conversion,
5. The information according to claim 4, wherein a user operation prohibition information storage box is set in a sample group information box that is a metadata storage box in units of sample groups of an MP4 file, and user operation prohibition information acquired from the playlist file is recorded. Processing equipment. The controller is
The information processing apparatus according to claim 1, wherein the user operation prohibition information is acquired from an information recording medium on which conversion target data is recorded or from the outside via a communication unit. The controller is
A playlist file to be converted is acquired from an information recording medium that records BDMV format data, identification information of the acquired playlist file is transmitted to an external server, and user operation prohibition information corresponding to the playlist file is received from the external server. The information processing apparatus according to claim 1 to be acquired. The data converter is
The information processing apparatus according to claim 1, wherein the BDMV format data is converted to generate a CFF file in accordance with CFF (Common File Format). The information processing apparatus further includes:
The information processing apparatus according to claim 1, further comprising: a recording unit that records data after data format conversion on the second information recording medium. A data conversion unit for performing format conversion from the first data format to the second data format;
A control unit that obtains information to be applied to the conversion process executed by the data conversion unit;
A recording unit that records the conversion data of the data conversion unit on an information recording medium;
The controller is
User operation prohibition information corresponding to reproduction data is acquired from a reproduction control file that is constituent data of the first data format,
The data converter is
Setting the user operation prohibition information as configuration data of the second data format;
The recording unit is
An information recording apparatus for recording the second format data generated by the data converter on an information recording medium. The data converter is
Execute processing to convert BDMV format data to MP4 format data,
13. The information recording apparatus according to claim 12, wherein the user operation prohibition information recorded in the playlist file of the BDMV format data is recorded in a user operation prohibition information storage box set in the MP4 format data. It has an MP4 file that stores MP4 format data as recording data,
The MP4 file is
Including user operation prohibition information and data range information to which the user operation prohibition information is applied,
An information processing apparatus that executes the reproduction process of the MP4 file,
An information recording medium that enables reproduction control to stop execution of processing for a user operation with reference to the user operation prohibition information and the data range information. An information processing method executed in an information processing apparatus,
The information processing apparatus includes:
A data conversion unit for performing format conversion from the first data format to the second data format;
A control unit that obtains information to be applied to the conversion process executed by the data conversion unit;
The control unit is
User operation prohibition information corresponding to reproduction data is acquired from a reproduction control file that is constituent data of the first data format,
The data converter is
An information processing method for recording the user operation prohibition information as configuration data in the second data format. A program for executing information processing in an information processing apparatus;
The information processing apparatus includes:
A data conversion unit for performing format conversion from the first data format to the second data format;
A control unit that obtains information to be applied to the conversion process executed by the data conversion unit;
The program is stored in the control unit.
User operation prohibition information corresponding to reproduction data is acquired from a reproduction control file that is constituent data of the first data format,
In the data converter,
A program for recording the user operation prohibition information as configuration data of the second data format.

Images