JP2016085769A - Information processing device, information processing method, program, and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the setting of the number of bits and the color gamut of an image to be reproduced.SOLUTION: A BD-J execution part sets the number of bits of a screen to be reproduced. A graphic processing part generates a graphic to be reproduced of the number of bits set by the BD-J execution part. The disclosure is applicable to a playback device or the like for playing back an optical disk with, for example, a stream file of AV streams of main video in a video format having difference in the number of bits and a color gamut, a BDJO file, a BD-J file, or the like recorded.SELECTED DRAWING: Figure 8

Description

  The present disclosure relates to an information processing device, an information processing method, a program, and a recording medium. The present invention relates to a program and a recording medium.

  BDA (Blu-ray Disc Association) has developed a standard for BD (Blu-ray (registered trademark) Disc). A main video, audio, a navigation program called BD-J (Blu-ray Disc Java), and the like can be recorded on the BD (see, for example, Patent Document 1). By executing BD-J, the playback device can control the playback of the main video and audio recorded on the BD, and can generate and display graphics such as menu buttons and games. it can.

  Currently, BDA is developing the UHD (Ultra High Definition) BD standard. In the UHD BD standard, it is considered that the following seven video formats are introduced.

(1) AVC 1920 × 1080 BT.709 SDR 8bit
(2) HEVC 1920 × 1080 BT.709 SDR 10bit
(3) HEVC 1920 × 1080 BT.2020 SDR 10bit
(4) HEVC 1920 × 1080 BT.2020 HDR 10bit
(5) HEVC 3840 × 2160 BT.709 SDR 10bit
(6) HEVC 3840 × 2160 BT.2020 SDR 10bit
(7) HEVC 3840 × 2160 BT.2020 HDR 10bit

  In the above (1) to (7), the encoding method, resolution, color gamut standard, dynamic range, and number of bits of each video format are described in order.

  That is, in the video formats (1) to (7), the AVC (Advanced Video Coding) method or the HEVC (High Efficiency Video Coding) method is adopted as the encoding method. Further, 1920 × 1080 pixels or 3840 × 2160 pixels are adopted as the resolution, and BT.709 or BT.2020 is adopted as the color gamut. Furthermore, SDR or HDR is adopted as the dynamic range, and 8 bits or 10 bits are adopted as the number of bits.

JP 2012-085206 JP

  As described above, in the video format handled in the UHD BD standard, when the resolution is 1920 × 1080 pixels, the color gamut is BT.709, and the dynamic range is SDR, the number of bits is 8 bits and 10 bits. Can take both bits. Also, the encoding method, resolution, dynamic range, and number of bits are the same, but only the color gamut may be different. Therefore, the playback apparatus needs to set the number of bits and the color gamut of the image to be played back.

  The present disclosure has been made in view of such a situation, and makes it possible to set the number of bits and the color gamut of an image to be reproduced.

An information processing apparatus according to the first aspect of the present disclosure includes a setting unit that sets the number of bits of an image to be reproduced,
And a generation unit that generates the reproduction target image having the number of bits set by the setting unit.

  The information processing method and program according to the first aspect of the present disclosure correspond to the information processing apparatus according to the first aspect of the present disclosure.

  In the first aspect of the present disclosure, the number of bits of an image to be reproduced is set, and the image to be reproduced having the set number of bits is generated.

  The recording medium according to the second aspect of the present disclosure is a recording medium on which information for instructing the setting of the number of bits of an image to be reproduced is recorded, mounted on an information processing apparatus, and reproduced. A recording medium that causes an information processing apparatus to set the number of bits of the reproduction target image and to generate the reproduction target image having the set number of bits.

  In the second aspect of the present disclosure, information instructing setting of the number of bits of an image to be reproduced is recorded.

  An information processing apparatus according to a third aspect of the present disclosure is an information processing apparatus including a generation unit that generates a file including information that instructs setting of the number of bits of an image to be reproduced.

  In the third aspect of the present disclosure, a file including information instructing setting of the number of bits of an image to be reproduced is generated.

  An information processing apparatus according to a fourth aspect of the present disclosure includes a setting unit that sets a color gamut of an image to be reproduced, and a generation unit that generates the image to be reproduced of the color gamut set by the setting unit. An information processing apparatus is provided.

  In the fourth aspect of the present disclosure, the color gamut of the reproduction target image is set, and the reproduction target image of the set color gamut is generated.

  According to the first aspect of the present disclosure, an image can be generated. Further, according to the first aspect of the present disclosure, the number of bits of an image to be reproduced can be set.

  Moreover, according to the second aspect of the present disclosure, an image can be generated. Further, according to the second aspect of the present disclosure, the number of bits of an image to be reproduced can be set.

  Furthermore, according to the third aspect of the present disclosure, a file can be generated. Further, according to the third aspect of the present disclosure, a file including information instructing setting of the number of bits of an image to be reproduced can be generated.

  Moreover, according to the fourth aspect of the present disclosure, an image can be generated. Further, according to the fourth aspect of the present disclosure, it is possible to set a color gamut of an image to be reproduced.

  Note that the effects described here are not necessarily limited, and may be any of the effects described in the present disclosure.

It is a block diagram which shows the structural example of one Embodiment of the recording / reproducing system to which this indication is applied. It is a figure which shows the example of the management structure of the file recorded on the optical disk of FIG. It is a figure which shows the example of the syntax of a BDJO file. It is a figure which shows the example of the syntax of TerminalInfo. It is a figure which shows the example of the value showing the initial value contained in TerminalInfo. It is a figure explaining the plane which comprises a screen. It is a figure explaining the extension of the class of API (Application Programming Interface) of BD-J. FIG. 2 is a block diagram illustrating a configuration example of a playback device in FIG. 1. It is a block diagram which shows the structural example of a bit number color gamut setting part. FIG. 9 is a flowchart for explaining a reproduction process of the reproduction apparatus in FIG. 8. FIG. It is a block diagram which shows the structural example of the hardware of a computer.

Hereinafter, modes for carrying out the present disclosure (hereinafter referred to as embodiments) will be described. The description will be given in the following order.
1. First Embodiment: Recording / Reproducing System (FIGS. 1 to 10)
2. Second Embodiment: Computer (FIG. 11)

<First embodiment>
(Configuration example of one embodiment of recording / reproducing system)
FIG. 1 is a block diagram illustrating a configuration example of an embodiment of a recording / reproducing system to which the present disclosure is applied.

  The recording / reproducing system of FIG. 1 includes a recording device 1, a reproducing device 2, and a display device 3, and can handle images of the seven types of video formats described above (hereinafter referred to as UHD format). The playback device 2 and the display device 3 are connected via an HDMI (registered trademark) (High Definition Multimedia Interface) cable 4. The playback device 2 and the display device 3 may be connected via a cable of another standard, or may be connected via wireless communication.

  The recording device (information processing device) 1 records content such as UHD format main video, audio, and BD-J, and the playback device 2 (information processing device) executes the BD-J, thereby Play audio, generate graphics and background images. Since the process related to the background image is the same as the process related to graphics, description thereof will be omitted as appropriate.

  The provision of content from the recording device 1 to the playback device 2 is performed using the optical disk 11 mounted on the recording device 1 and the playback device 2. The optical disc 11 is a disc on which content is recorded in a format conforming to, for example, a BD-ROM (Read Only Memory) format.

  Content recording on the optical disc 11 may be performed in a format that conforms to other formats such as BD-R and -RE. In addition, provision of content from the recording device 1 to the playback device 2 may be performed using a removable medium other than the optical disk, such as a memory card equipped with a flash memory.

  When the optical disc 11 is a BD-ROM disc, the recording device 1 is, for example, a device used by a content author. In the following description, it is assumed that the optical disc 11 on which content is recorded by the recording device 1 is provided to the playback device 2 as appropriate. However, in practice, the optical disc is copied based on the master disk on which the content is recorded by the recording device 1. Then, the optical disc 11 as one of them is provided to the playback device 2.

  Content such as UHD format main video, audio, and BD-J is input to the recording device 1. The recording device 1 encodes and multiplexes the main video and audio in the UHD format, and generates an AV stream that is one TS (Transport Stream). The recording device 1 records the generated AV stream, BD-J, etc. on the optical disc 11.

  The playback device 2 drives the drive and reads the AV stream recorded on the optical disc 11. The playback device 2 separates the AV stream into a main video AV stream and an audio AV stream and decodes them. The playback device 2 combines the main video obtained by decoding and the graphics generated by executing BD-J, and transmits the composite image to the display device 3. Further, the playback device 2 transmits the audio obtained by decoding to the display device 3.

  The display device 3 receives the composite image transmitted from the playback device 2 and displays it on a monitor (not shown). Further, the display device 3 receives the sound transmitted from the reproduction device 2 and outputs it from a speaker (not shown).

(Directory structure)
FIG. 2 is a diagram showing an example of the management structure of files recorded on the optical disc 11 of FIG.

  Each file recorded on the optical disc 11 is managed hierarchically by a directory structure. One root directory is created on the optical disc 11.

  Under the root directory, a BDMV directory, a CERTIFICATE directory, and the like are placed.

  Under the BDMV directory, an Index file that is a file with the name “Index.bdmv” and a Movie Object file that is a file with the name “MovieObject.bdmv” are stored.

  In the Index file, for example, a list of title numbers recorded on the optical disc 11 and the types and numbers of objects executed corresponding to the title numbers are described. There are two types of objects, a movie object (Movie Object) and a BD-J object (BD-J Object).

  The movie object is an object in which a navigation command, which is a command used for PlayList playback or the like, is described. The BD-J object is an object in which BD-J is described. A movie object is described in the Movie Object file.

  Under the BDMV directory, a PLAYLIST directory, a CLIPINF directory, a STREAM directory, a BDJO file, a JAR file, and the like are also provided.

  The PLAYLIST directory stores a PlayList file describing a PlayList used as playback management information for managing playback of AV streams. Each PlayList file has a name that is a combination of a 5-digit number and an extension “.mpls”. In one PlayList file shown in FIG. 2, a file name “00000.mpls” is set.

  In the CLIPINF directory, information related to a predetermined unit of AV stream is stored as a Clip Information file. Each Clip Information file is set with a name combining a five-digit number and the extension “.clpi”. In the three Clip Information files in FIG. 2, file names of “01000.clpi”, “02000.clpi”, and “03000.clpi” are set, respectively.

  The STREAM directory stores a predetermined unit of AV stream as a stream file. Each stream file has a name that is a combination of a 5-digit number and an extension “.m2ts”. In the three stream files in FIG. 2, file names “01000.m2ts”, “02000.m2ts”, and “03000.m2ts” are set, respectively.

  The Clip Information file and the stream file in which the same 5-digit number is set as the file name are files constituting one Clip. When a stream file having the file name “01000.m2ts” constituting one Clip is reproduced, the Clip Information file having the file name “01000.clpi” constituting the Clip is used.

  The BDJO file is a static database file that describes the BD-J class that is activated first with the corresponding title, information that identifies the JAR file with the corresponding title, and the like. A JAR file is a compressed file containing a plurality of BD-J files.

  The playback apparatus 2 refers to the Index file and identifies the title object to be played back. When the title object to be played is a BD-J object, the playback device 2 reads the BDJO file of the BD-J object, and reads the BD-J file embedded in the JAR file specified by the BDJO file. Run. Thereby, the playback device 2 performs graphics generation and display, playback of main video and audio according to the PlayList, network connection, storage access, and the like.

  Under the CERTIFICATE directory, a certificate that proves the authenticity of the signature attached to the Jar file is stored as a CERTIFICATE file (not shown).

(BDJO file syntax example)
FIG. 3 is a diagram illustrating an example of the syntax of a BDJO file.

  As shown in FIG. 3, in the BDJO file (xxxxx.bdjo), TerminalInfo including initial values of information related to the screen of the corresponding title is described.

(TerminalInfo syntax example)
FIG. 4 is a diagram illustrating an example of syntax of TerminalInfo, and FIG. 5 is a diagram illustrating an example of a value representing an initial value included in TerminalInfo.

  As shown in FIG. 4, TerminalInfo describes 4-bit initial_HAVi_configuration_id representing the initial resolution value of the screen of the corresponding title.

  As shown in FIG. 5A, initial_HAVi_configuration_id is 1 when representing 1920 × 1080 pixel FHD (Full High Definition) as an initial value, and 6 when representing 960 × 540 pixel QHD (Quarter High Definition) as an initial value. is there. In addition, when 4k resolution of 3840 × 2160 pixels is expressed as an initial value, initial_HAVi_configuration_id is 7.

  TerminalInfo describes 1-bit initial_dynamic_range representing the initial value of the dynamic range of the screen of the corresponding title. As illustrated in FIG. 5B, initial_dynamic_range is 0 when SDR is represented as an initial value, and is 1 when HDR is represented as an initial value.

  Further, TerminalInfo describes 1-bit initial_bitdepth representing the initial value of the number of bits of the screen of the corresponding title. As shown in FIG. 5C, initial_bitdepth is 0 when 8 bits are represented as an initial value, and 1 when 10 bits are represented as an initial value. Here, the value of initial_bitdepth is assigned to the possible number of bits, but initial_bitdepth may be defined as field, and the number of bits itself may be set to the value of initial_bitdepth.

  TerminalInfo describes 1-bit initial_color_space representing the initial value of the color gamut of the screen of the corresponding title. As shown in FIG. 5D, initial_color_space is 0 when BT.709 is expressed as an initial value, and 1 when BT.2020 is expressed as an initial value.

(Plain description)
FIG. 6 is a diagram for explaining planes constituting a screen generated by executing a BD-J file.

  A screen generated by executing a BD-J file is called an HScreen, and the HScreen includes a BDJ Graphics Plane, a Video Plane, and a Background Plane as shown in FIG.

  BDJ Graphics Plane consists of graphics for one screen, Video Plane consists of main video for one screen, and Background Plane consists of background images for one screen.

  In a recording and playback system that cannot handle UHD format images, BDJ Graphics Plane playback is performed using the org.blurayx.uhd.ui # HGraphicsDevice class, org.blurayx.uhd.ui # HGraphicsConfiguration class, and BD-J file It is controlled using org.blurayx.uhd.ui # HGraphicsConfigurationTemplate class.

  Specifically, the resolution of the BDJ Graphics Plane, information indicating whether the BDJ Graphics Plane is a 2D image or a 3D image, and the like are respectively BD-J using the org.blurayx.uhd.ui # HGraphicsConfigurationTemplate class. Is set by executing Then, the set information is collected as information related to playback of the BDJ Graphics Plane by executing BD-J using the org.blurayx.uhd.ui # HGraphicsConfiguration class. The collected information is set as information related to playback of the BDJ Graphics Plane by executing BD-J using the org.blurayx.uhd.ui # HGraphicsDevice class.

  Video Plane playback is the same as BDJ Graphics Plane playback: org.blurayx.uhd.ui # HVideoDevice class, org.blurayx.uhd.ui # HVideoConfiguration class, and org.blurayx.uhd. It is controlled by executing BD-J using ui # HVideoConfigurationTemplate class. In addition, playback of Background Plane is the same as playback of BDJ Graphics Plane, org.blurayx.uhd.ui # HBackgroundDevice class, org.blurayx.uhd.ui # HBackgroundConfiguration class, and org.blurayx.uhd.ui # HBackgroundConfigurationTemplate class It is controlled by executing BD-J using.

  On the other hand, in the recording / playback system of FIG. 1 capable of handling UHD format images, the playback device 2 changes the number of bits and color gamut of the screen to be played back, or the bits of the screen to be played back that are currently set. It is necessary to acquire the number and color gamut. However, in the above-described class, the playback device 2 cannot execute these processes. Accordingly, the BD-J class necessary for executing these processes is extended.

  In the recording / playback system in FIG. 1 that can handle UHD format images, the playback device 2 needs to change or acquire the dynamic range and resolution of the screen to be played back in the same way. Since the present technology is an invention related to the number of bits and the color gamut, in this specification, the change and acquisition of the dynamic range and resolution are ignored.

(BD-J class extension)
FIG. 7 is a diagram for explaining the extension of the BD-J API class in the recording / playback system of FIG.

  As shown in FIG. 7, the org.blurayx.uhd.ui # HGraphicsConfigurationUHD class is newly defined as the BD-J API class in the recording / playback system of FIG. This org.blurayx.uhd.ui # HGraphicsConfigurationUHD class is a class having a setBitDepth (int bitdepth) function and an int getBitDepth (void) function in addition to the functions of the org.blurayx.uhd.ui # HGraphicsConfigurationTemplate class.

  That is, the org.blurayx.uhd.ui # HGraphicsConfigurationUHD class has (inherits) the function of the org.blurayx.uhd.ui # HGraphicsConfiguration class. In the org.blurayx.uhd.ui # HGraphicsConfigurationUHD class, a setBitDepth (int bitdepth) function and an int getBitDepth (void) function can be newly described.

  “int bitdepth” in the setBitDepth (int bitdepth) function is a setting value of the number of bits of the corresponding playback target plane. “SetBitDepth” is a description for instructing to set the set value. The int getBitDepth (void) function is a description instructing to acquire the currently set number of bits of the corresponding playback target plane.

  Similarly, org.blurayx.uhd.ui # HVideoConfigurationUHD class having setBitDepth (int bitdepth) function and int getBitDepth (void) function of Video Plane as BD-J API classes in the recording / playback system of FIG. An org.blurayx.uhd.ui # HBackgroundConfigurationUHD class having a setBitDepth (int bitdepth) function and an int getBitDepth (void) function of Background Plane is newly defined.

  Also, as the BD-J API class in the recording / playback system of FIG. 1, an org.blurayx.uhd.ui # ColorSpace class that newly expresses a color gamut is defined. This org.blurayx.uhd.ui # ColorSpace class represents whether the color gamut is BT.709 or BT.2020. org.blurayx.uhd.ui # ColorSpace # BT709 indicates that the color gamut is BT.709, and org.blurayx.uhd.ui # ColorSpace # BT2020 indicates that the color gamut is BT.2020.

  Further, org.blurayx.uhd.ui # HGraphicsConfigurationTemplateUHD class is newly defined as the BD-J API class in the recording / reproducing system of FIG. The org.blurayx.uhd.ui # HGraphicsConfigurationTemplateUHD class is a class having a function for setting and acquiring a color gamut of the BDJ Graphics Plane in addition to the function of the org.blurayx.uhd.ui # HGraphicsConfigurationTemplate class.

  That is, the org.blurayx.uhd.ui # HGraphicsConfigurationTemplateUHD class has (inherits) the function of the org.blurayx.uhd.ui # HGraphicsConfigurationTemplate class. And in org.blurayx.uhd.ui # HGraphicsConfigurationTemplateUHD class, org.blurayx.uhd.ui # HGraphicsConfigurationTemplateUHD # ColorSpace can be newly described as a property, and setPreference (ColorSpace, ColorSpace # BT709 / # BT2020, REQUIRED) function and The getPreference (ColorSpace) function can be described.

  "ColorSpace # BT709 / # BT2020" in the setPreference (ColorSpace, ColorSpace # BT709 / # BT2020, REQUIRED) function indicates that the setting value of the corresponding playback target plane is BT.709 or BT.2020 Yes. “SetPreference (ColorSpace,..., REQUIRED)” is a description instructing to set the color gamut of the plane to be reproduced as the set value.

  The getPreference (ColorSpace) function gets org.blurayx.uhd.ui # ColorSpace # BT709 or org.blurayx.uhd.ui # ColorSpace # BT2020 that represents the currently set color gamut of the corresponding playback target plane. It is a description to instruct.

  Similarly, the org.blurayx.uhd.ui # HVideoConfigurationTemplateUHD class, which has a function to set and acquire the Video Plane color gamut, and the Background Plane color gamut as the BD-J API class in the recording / playback system of FIG. A new org.blurayx.uhd.ui # HBackgroundConfigurationTemplateUHD class is defined which has the function to set and get the.

  The playback apparatus 2 in FIG. 1 uses an org.blurayx.uhd.ui # HGraphicsConfiguration class and an org.blurayx.uhd.ui # HGraphicsConfigurationTemplate class instead of an org.blurayx.uhd.ui # HGraphicsConfigurationUHD class, org.blurayx.uhd. The playback of the BDJ Graphics Plane is controlled by executing BD-J using the ui # HGraphicsConfigurationTemplateUHD class.

  Specifically, the playback device 2 represents the resolution of the BDJ Graphics Plane and whether the BDJ Graphics Plane is a 2D image or a 3D image according to the description using the org.blurayx.uhd.ui # HGraphicsConfigurationTemplateUHD class. Set information, BDJ Graphics Plane color gamut, etc. Then, the playback device 2 collects the set information as information related to playback of the playback target BDJ Graphics Plane according to the description using the org.blurayx.uhd.ui # HGraphicsConfigurationUHD class. Further, the playback device 2 sets the number of bits of the BDJ Graphics Plane in accordance with the description using the org.blurayx.uhd.ui # HGraphicsConfigurationUHD class, and includes it in the information related to playback of the BDJ Graphics Plane.

  Then, the playback device 2 sets information gathered as information related to playback of the playback target BDJ Graphics Plane according to the description using the org.blurayx.uhd.ui # HGraphicsDevice class. The playback device 2 controls playback of the BDJ Graphics Plane based on information related to playback of the playback target BDJ Graphics Plane.

  Similarly, the playback apparatus 2 includes the org.blurayx.uhd.ui # HVideoConfigurationUHD class, the org.blurayx.uhd.ui # HVideoConfigurationTemplateUHD class, the org.blurayx.uhd.ui # HBackgroundConfigurationUHD class, and the org.blurayx.uhd.ui # HBackgroundConfigurationTemplateUHD. Playback of Video Plane and Background Plane is controlled by executing BD-J using classes.

  In addition, since this technique is a technique regarding an image, description of the technique regarding an audio | voice is abbreviate | omitted below.

(Configuration example of playback device)
FIG. 8 is a block diagram illustrating a configuration example of the playback device 2 of FIG.

  The playback device 2 includes a controller 51, a disk drive 52, a memory 53, a local storage 54, a network interface 55, an operation input unit 56, a video decoder 58, a graphics processing unit 59, a synthesis unit 60, and an HDMI communication unit 61. The

  The controller 51 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The controller 51 executes a predetermined program and controls the overall operation of the playback device 2 in accordance with an operation signal from the operation input unit 56.

  The CPU of the controller 51 functions as a BD-J execution unit 51A that reads, for example, a BDJO file on the optical disc 11 and a JAR file specified by the BDJO file, and executes the BD-J file built in the JAR file.

  Based on TerminalInfo of the BDJO file, the BD-J execution unit 51A sets an initial value of information related to reproduction of each plane of the screen to be reproduced, and supplies the information to the memory 53 for storage. For example, the BD-J execution unit 51A sets the number of bits represented by initial_bitdepth included in TerminalInfo as an initial value of the number of bits of each plane of the screen to be played, and supplies the memory 53 with the stored value. In this way, the number of bits represented by initial_bitdepth is set as the initial value of the number of bits of each plane of the screen to be played back, so initial_bitdepth instructs the setting of the initial value of the number of bits of each plane of the screen to be played back It can be said that it is information to do.

  In addition, the BD-J execution unit 51A sets initial_color_space included in TerminalInfo as an initial value of the color gamut of each plane of the screen to be reproduced, and supplies the memory 53 with the memory. As described above, initial_color_space is set as an initial value of the color gamut of each plane of the screen to be reproduced, so initial_color_space is information instructing setting of the initial value of the color gamut of each plane of the screen to be reproduced. It can be said.

  In this specification, it is assumed that the setting values of information related to playback of the BDJ Graphics Plane, Video Plane, and Background Plane constituting the screen to be played back are the same. Accordingly, the memory 53 stores the set value as the set value of the screen to be reproduced that is currently set, but may be stored for each plane.

  The BD-J execution unit 51A also executes the BD-J file to supply the bit number and color gamut setting value of the screen to be reproduced to the memory 53, and to store the stored bit number and color gamut. Change it. Further, the BD-J execution unit 51A executes playback of the BD-J file to control playback of the AV stream based on the PlayList and Clip Information supplied from the disc drive 52, and to play back the BDJ Graphics Plane. Generate graphics based on information.

  Furthermore, the BD-J execution unit 51A executes the BD-J file to access the local storage 54 or connect the network interface 55 to a network such as the Internet.

  The disc drive 52 reproduces and acquires a BD-J file from the optical disc 11 and outputs it to the BD-J execution unit 51A under the control of the BD-J execution unit 51A. Further, the disc drive 52 reads the PlayList and Clip Information from the optical disc 11 and outputs them to the BD-J execution unit 51A in accordance with the control of the BD-J execution unit 51A that executes the read BD-J file. Further, the disc drive 52 reads the AV stream of the main video to be reproduced from the optical disc 11 and outputs it to the video decoder 58 under the control of the BD-J execution unit 51A.

  The memory 53 includes data necessary for the controller 51 to execute various processes, such as the initial value of information related to reproduction such as the number of bits of the screen to be reproduced and the color gamut supplied from the BD-J execution unit 51A. Remember. Further, the memory 53 changes the stored bit number and color gamut to the bit number and color gamut setting values of the screen to be reproduced supplied from the BD-J execution unit 51A.

  The local storage 54 is configured by, for example, an HDD (Hard Disk Drive). The local storage 54 records, for example, data supplied from the BD-J execution unit 51A or reads the recorded data and supplies it to the BD-J execution unit 51A.

  The network interface 55 is connected to a network such as the Internet under the control of the BD-J execution unit 51A. The network interface 55 communicates with the server via the connected network, and supplies data downloaded from the server to the BD-J execution unit 51A. This data is supplied to the local storage 54 and recorded, for example.

  The video decoder 58 decodes the AV stream of the main video in the UHD format, which is supplied from the disk drive 52 and includes information related to playback of the currently set playback target screen. The video decoder 58 outputs the main video generated as a result of the decoding to the synthesizing unit 60.

  The graphics processing unit 59 (generation unit) generates graphics in the UHD video format including information related to playback of the currently set playback target screen according to the control of the BD-J execution unit 51A. The graphics processing unit 59 outputs the generated graphics to the synthesis unit 60.

  The synthesis unit 60 synthesizes the main video supplied from the video decoder 58 and the graphics supplied from the graphics processing unit 59. The combining unit 60 outputs the combined image obtained as a result of combining to the HDMI communication unit 61.

  The HDMI communication unit 61 communicates with the display device 3 via the HDMI cable 4. For example, the HDMI communication unit 61 outputs the combined image supplied from the combining unit 60 to the display device 3 in FIG.

(Configuration example of the bit number color gamut setting unit)
FIG. 9 is a block diagram illustrating a configuration example of a bit number color gamut setting unit that sets the number of bits and the color gamut of the BDJ Graphics Plane to be reproduced, which is realized by the BD-J execution unit 51A of FIG.

  As shown in FIG. 9, the bit number color gamut setting unit 80 includes an acquisition unit 81 and a setting unit 82.

  The acquisition unit 81 executes the int getBitDepth (void) function described using the org.blurayx.uhd.ui # HGraphicsConfigurationUHD class in the BD-J file, thereby reproducing the BDJ to be played back stored in the memory 53. Get the number of bits of Graphics Plane. The acquisition unit 81 supplies the acquired number of bits to the graphics processing unit 59.

  In addition, the acquisition unit 81 executes the getPreference (ColorSpace) function described using the org.blurayx.uhd.ui # HGraphicsConfigurationTemplateUHD class in the BD-J file, thereby reproducing the reproduction target stored in the memory 53. Get the BDJ Graphics Plane color gamut using the org.blurayx.uhd.ui # ColorSpace class representation. The acquiring unit 81 supplies the graphics processing unit 59 with the color gamut represented by the acquired org.blurayx.uhd.ui # ColorSpace # BT709 or org.blurayx.uhd.ui # ColorSpace # BT2020.

  The setting unit 82 acquires initial_bitdepth included in TerminalInfo of the BDJO file of the title to be played, and sets the initial value represented by the initial_bitdepth to the number of bits of the BDJ Graphics Plane to be played. Also, the setting unit 82 acquires the int bitdepth by executing the setBitDepth (int bitdepth) function described using the org.blurayx.uhd.ui # HGraphicsConfigurationUHD class in the BD-J file, and Set (change) the bit number of BDJ Graphics Plane.

  Also, the setting unit 82 acquires initial_color_space included in TerminalInfo of the BDJO file of the title to be played back, and sets the initial value represented by the initial_color_space to the color gamut of the BDJ Graphics Plane to be played back. Furthermore, the setting unit 82 executes the setPreference (ColorSpace, ColorSpace # BT709 / # BT2020, REQUIRED) function described using the org.blurayx.uhd.ui # HGraphicsConfigurationTemplateUHD class in the BD-J file, thereby The setting value represented by “ColorSpace # BT709 / # BT2020” is acquired and set (changed) to the color gamut of the BDJ Graphics Plane to be played back. The setting unit 82 supplies the memory 53 with the number of bits and the color gamut of the set BDJ Graphics Plane to be played back, and stores them.

(Description of processing of playback device)
FIG. 10 is a flowchart for explaining the playback process of the playback device 2 of FIG.

  In step S31 of FIG. 10, the disc drive 52 reads the BDJO file of the title to be played from the optical disc 11 and outputs it to the BD-J execution unit 51A under the control of the controller 51.

  In step S <b> 32, the BD-J execution unit 51 </ b> A sets an initial value of information related to playback of each plane of the playback target screen based on the TerminalInfo of the BDJO file supplied from the disk drive 52 and supplies the information to the memory 53. To remember.

  For example, the setting unit 82 (FIG. 9) of the BD-J execution unit 51A sets the bit number represented by initial_bitdepth included in TerminalInfo to the bit number of the BD-J Graphics Plane to be played back, and supplies the bit number to the memory 53. Remember. In addition, the setting unit 82 sets the color gamut represented by initial_color_space included in TerminalInfo to the color gamut of the BD-J Graphics Plane to be played back, and supplies the memory 53 to the memory 53 for storage.

  In step S33, the disc drive 52 reads the JAR file of the title to be played back from the optical disc 11 according to the control based on the BDJO file of the BD-J execution unit 51A, and outputs it to the BD-J execution unit 51A.

  In step S34, the setting unit 82 of the BD-J execution unit 51A determines whether to change the number of bits of the BD-J Graphics Plane to be played back according to the BD-J file built in the JAR file. Specifically, the setting unit 82 determines whether the current execution target of the BD-J file is the setBitDepth (10) function or the setBitDepth (8) function. Note that in the first process of step S34, the current execution target of the BD-J file is the first description of the BD-J file.

  When the current execution target of the BD-J file is the setBitDepth (10) function or the setBitDepth (8) function, the setting unit 82 changes the bit number of the BD-J Graphics Plane to be played back in step S34. judge. Then, the process proceeds to step S35.

  In step S35, the setting unit 82 changes the bit number of the BD-J Graphics Plane to be reproduced by executing the current execution target of the BD-J file.

  Specifically, when the current execution target of the BD-J file is the setBitDepth (10) function, the setting unit 82 changes the number of bits stored in the memory 53 to 10 bits. On the other hand, when the current execution target of the BD-J file is the setBitDepth (8) function, the setting unit 82 changes the number of bits stored in the memory 53 to 8 bits. After changing the number of bits, the current execution target is moved to the next description, and the process proceeds to step S36.

  On the other hand, when the current execution target of the BD-J file is not the setBitDepth (10) function and the setBitDepth (8) function, in step S34, the setting unit 82 sets the bit number of the BD-J Graphics Plane to be played back. It is determined not to change. Then, the process proceeds to step S36.

  In step S36, the setting unit 82 determines whether to change the color gamut of the BD-J Graphics Plane to be reproduced according to the BD-J file. Specifically, the setting unit 82 determines whether the current execution target of the BD-J file is a setPreference (ColorSpace, ColorSpace # BT709, REQUIRED) function or a setPreference (ColorSpace, ColorSpace # BT2020, REQUIRED) function. judge.

  When the current execution target of the BD-J file is the setPreference (ColorSpace, ColorSpace # BT709, REQUIRED) function or the setPreference (ColorSpace, ColorSpace # BT2020, REQUIRED) function, the setting unit 82 is the playback target in step S36. It is determined that the color gamut of the BD-J Graphics Plane is changed. Then, the process proceeds to step S37.

  In step S37, the setting unit 82 changes the color gamut of the reproduction target BD-J Graphics Plane by executing the current execution target of the BD-J file.

  Specifically, the setting unit 82 sets the color gamut stored in the memory 53 to BT.709 when the current execution target of the BD-J file is a setPreference (ColorSpace, ColorSpace # BT709, REQUIRED) function. Change to On the other hand, when the current execution target of the BD-J file is the setPreference (ColorSpace, ColorSpace # BT2020, REQUIRED) function, the setting unit 82 changes the color gamut stored in the memory 53 to BT.2020. . After changing the color gamut, the current execution target is moved to the next description, and the process proceeds to step S38.

  On the other hand, if the current execution target of the BD-J file is not the setPreference (ColorSpace, ColorSpace # BT709, REQUIRED) function and the setPreference (ColorSpace, ColorSpace # BT2020, REQUIRED) function, in step S36, the setting unit 82 It is determined that the color gamut of the playback target BD-J Graphics Plane is not changed. Then, the process proceeds to step S38.

  In step S38, the disc drive 52 reads the PlayList and Clip Information to be played back from the optical disc 11 according to the control of the BD-J execution unit 51A that executes the current execution target, and outputs them to the BD-J execution unit 51A. The BD-J execution unit 51A controls the playback of the AV stream based on the PlayList and Clip Information supplied from the disc drive 52. The BD-J execution unit 51A moves the current execution target of the BD-J file to the next description.

  In step S39, the disc drive 52 reads the AV stream of the main video to be played back from the optical disc 11 and outputs it to the video decoder 58 according to the control of the BD-J execution unit 51A.

  In step S40, the BD-J execution unit 51A executes the current execution target of the BD-J file, thereby acquiring information related to playback of the playback target BD-J Graphics Plane, and sends the information to the graphics processing unit 59. Supply.

  For example, the acquisition unit 81 (FIG. 9) of the BD-J execution unit 51A executes the int getBitDepth (void) function that is the current execution target of the BD-J file, thereby reproducing the reproduction stored in the memory 53. Get the number of bits of the target BD-J Graphics Plane. Then, the acquisition unit 81 supplies the acquired graphics processing unit 59, and the current execution target of the BD-J file is moved to the next description.

  Further, the acquisition unit 81 represents the color gamut of the reproduction target BD-J Graphics Plane stored in the memory 53 by executing the getPreference (ColorSpace) function that is the current execution target of the BD-J file. Get org.blurayx.uhd.ui # ColorSpace # BT709 or org.blurayx.uhd.ui # ColorSpace # BT2020. Then, the acquisition unit 81 supplies the gamut represented by the acquired org.blurayx.uhd.ui # ColorSpace # BT709 or org.blurayx.uhd.ui # ColorSpace # BT2020 to the graphics processing unit 59, and the BD-J The current execution target of the file is moved to the next description.

  In step S41, the video decoder 58 decodes the AV stream of the main video in the UHD format, which is supplied from the disk drive 52 and includes information related to the video plane to be played back. The video decoder 58 outputs the main video generated as a result of the decoding to the synthesizing unit 60.

  In step S42, the graphics processing unit 59 performs the playback target BD-J Graphics Plane supplied from the acquisition unit 81 in accordance with the control of the BD-J execution unit 51A that executes the current execution target of the BD-J file. Generate UHD format graphics that contain information about the playback of the video. The graphics processing unit 59 outputs the generated graphics to the synthesis unit 60.

  In step S43, the synthesizing unit 60 synthesizes the main video supplied from the video decoder 58 and the graphics supplied from the graphics processing unit 59 to generate a synthesized image. In step S <b> 44, the composition unit 60 outputs the composite image to the display device 3 via the HDMI communication unit 61.

  In step S45, the BD-J execution unit 51A determines whether or not the execution of the BD-J file has ended, that is, whether or not the last description of the BD-J file is the execution target. If it is determined in step S45 that the execution of the BD-J file has not ended, the current execution target of the BD-J file is moved to the next description, and the process returns to step S34. The processes in steps S34 to S45 are repeated until the execution of the BD-J file is completed.

  On the other hand, if it is determined in step S45 that the execution of the BD-J file has ended, the processing ends.

  In the playback process of FIG. 10, in the BD-J file, the description for instructing the change of the number of bits and the color gamut is performed before the description for instructing the reproduction according to the PlayList, and the acquisition of the number of bits and the color gamut is performed. Is described after the description instructing reproduction according to the PlayList.

  For example, when an AV stream of the main video in the UHD format (4) of the main part of the movie is played after playing the AV stream of the main video in the UHD format (1) of the trailer of the movie, the trailer is included in the BD-J file. After the description instructing reproduction according to the PlayList, int getBitDepth (void) and getPreference (ColorSpace) are described. After that, setBitDepth (10) and setPreference (ColorSpace, ColorSpace # BT2020, REQUIRED) are described, a description instructing playback according to the main PlayList is performed, and int getBitDepth (void) and getPreference (ColorSpace) are described .

  Further, when initial_bitdepth represents 10 bits, setBitDepth (8) is described in the BD-J file before the description instructing playback according to the PlayList of the trailer. Furthermore, when initial_color_space represents BT.2020, setPreference (ColorSpace, ColorSpace # BT709, REQUIRED) is described in the BD-J file before the description instructing playback according to the PlayList of the trailer.

  However, the position of the description instructing the change or acquisition of the number of bits and the color gamut of the screen to be reproduced is not limited to this, and can be a desired position of the author of the content.

  As described above, the playback device 2 can set the number of bits and the color gamut of the screen to be played back, and can generate graphics with the set number of bits and the color gamut. Thereby, the playback device 2 can switch the number of bits and the color gamut of the graphics to be played back. The same applies to the background image.

<Second Embodiment>
(Description of computer to which the present disclosure is applied)
The series of processes described above can be executed by hardware or can be executed by software. When a series of processing is executed by software, a program constituting the software is installed in the computer. Here, the computer includes, for example, a general-purpose personal computer capable of executing various functions by installing various programs by installing a computer incorporated in dedicated hardware.

  FIG. 11 is a block diagram illustrating a hardware configuration example of a computer that executes the above-described series of processing by a program.

  In the computer 200, a CPU (Central Processing Unit) 201, a ROM (Read Only Memory) 202, and a RAM (Random Access Memory) 203 are connected to each other via a bus 204.

  An input / output interface 205 is further connected to the bus 204. An input unit 206, an output unit 207, a storage unit 208, a communication unit 209, and a drive 210 are connected to the input / output interface 205.

  The input unit 206 includes a keyboard, a mouse, a microphone, and the like. The output unit 207 includes a display, a speaker, and the like. The storage unit 208 includes a hard disk, a nonvolatile memory, and the like. The communication unit 209 includes a network interface and the like. The drive 210 drives a removable medium 211 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory.

  In the computer 200 configured as described above, for example, the CPU 201 loads the program stored in the storage unit 208 to the RAM 203 via the input / output interface 205 and the bus 204 and executes the program. A series of processing is performed.

  The program executed by the computer 200 (CPU 201) can be provided by being recorded in the removable medium 211 as a package medium or the like, for example. The program can be provided via a wired or wireless transmission medium such as a local area network, the Internet, or digital satellite broadcasting.

  In the computer 200, the program can be installed in the storage unit 208 via the input / output interface 205 by attaching the removable medium 211 to the drive 210. The program can be received by the communication unit 209 via a wired or wireless transmission medium and installed in the storage unit 208. In addition, the program can be installed in the ROM 202 or the storage unit 208 in advance.

  Note that the program executed by the computer 200 may be a program that is processed in time series in the order described in this specification, or a necessary timing such as in parallel or when a call is made. It may be a program in which processing is performed.

  In this specification, the system means a set of a plurality of components (devices, modules (parts), etc.), and it does not matter whether all the components are in the same housing. Accordingly, a plurality of devices housed in separate housings and connected via a network and a single device housing a plurality of modules in one housing are all systems. .

  The effects described in this specification are merely examples and are not limited, and may have other effects.

  The embodiments of the present disclosure are not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present disclosure.

  For example, in the first and second embodiments, the number of bits is two types of 8 bits and 10 bits, but may be three or more types. Similarly, the color gamut types may be three or more instead of the two types BT.709 and BT.2020.

  Alternatively, only one of the number of bits and the color gamut may be set or acquired. In this case, the other is a predetermined fixed value. Furthermore, the number of bits and the initial value of the color gamut are not described in TerminalInfo but may be determined in advance.

  Content can also be provided via broadcast waves or a network. In this case, the present disclosure can be applied to a set-top box that receives broadcast waves, a television receiver, a personal computer that transmits and receives data via a network, and the like.

  In addition, this indication can also take the following structures.

(1)
A setting section for setting the number of bits of the image to be reproduced;
An information processing apparatus comprising: a generation unit configured to generate the reproduction target image having the number of bits set by the setting unit.
(2)
The information processing apparatus according to (1), wherein the setting unit is configured to acquire and set an initial value of the number of bits of the reproduction target image.
(3)
The information processing apparatus according to (1) or (2), wherein the setting unit is configured to acquire and set a setting value of the number of bits of the reproduction target image.
(4)
The setting unit sets the setting value by executing BD-J using a BD-J (Blu-ray Disc Java) API (Application Programming Interface) class that instructs setting of the setting value. The information processing apparatus according to (3).
(5)
The information processing apparatus according to (4), wherein the class is configured to have a function of an HGraphicsConfiguration class.
(6)
By executing BD-J using a BD-J (Blu-ray Disc Java) API (Application Programming Interface) class that instructs acquisition of the number of bits set by the setting unit, the setting unit The information processing apparatus according to any one of (1) to (5), further including an acquisition unit that acquires the set number of bits.
(7)
Information processing device
A setting step for setting the number of bits of the image to be reproduced;
A generation step of generating the reproduction target image having the number of bits set by the setting step.
(8)
Computer
A setting section for setting the number of bits of the image to be reproduced;
A program for functioning as a generation unit that generates the reproduction target image having the number of bits set by the setting unit.
(9)
A recording medium on which information for instructing the setting of the number of bits of an image to be reproduced is recorded, attached to an information processing apparatus, and reproduced.
A recording medium that causes the information processing apparatus that has acquired the information to set the number of bits of the reproduction target image and to generate the reproduction target image having the set number of bits.
(10)
An information processing apparatus comprising: a generation unit that generates a file including information that instructs setting of the number of bits of an image to be reproduced.
(11)
A setting section for setting the color gamut of the image to be played,
An information processing apparatus comprising: a generation unit that generates the reproduction target image of the color gamut set by the setting unit.
(12)
The information processing apparatus according to (11), wherein the setting unit is configured to acquire and set an initial value of the color gamut of the reproduction target image.
(13)
The information processing apparatus according to (11) or (12), wherein the setting unit is configured to acquire and set a setting value of the color gamut of the reproduction target image.
(14)
The setting unit sets the setting value by executing BD-J using a BD-J (Blu-ray Disc Java) API (Application Programming Interface) class that instructs setting of the setting value. The information processing apparatus according to (13).
(15)
The information processing apparatus according to (14), wherein the class is configured to have a function of an HGraphicsConfigurationTemplate class.
(16)
By executing BD-J using a BD-J (Blu-ray Disc Java) API (Application Programming Interface) class that instructs acquisition of the color gamut set by the setting unit, the setting unit The information processing apparatus according to any one of (11) to (15), further including an acquisition unit that acquires the set color gamut.
(17)
The acquisition unit is configured to acquire the color gamut by using an API (Application Programming Interface) class representation of a BD-J (Blu-ray Disc Java) expressing the plurality of the color gamuts. ).
(18)
The information processing apparatus according to (17), wherein the plurality of color gamuts are configured to be BT.709 and BT.2020.

  DESCRIPTION OF SYMBOLS 1 Recording device, 2 Playback apparatus, 11 Optical disk, 59 Graphics processing part, 81 Acquisition part, 82 Setting part

Claims (18)

A setting section for setting the number of bits of the image to be reproduced;
An information processing apparatus comprising: a generation unit configured to generate the reproduction target image having the number of bits set by the setting unit. The information processing apparatus according to claim 1, wherein the setting unit is configured to acquire and set an initial value of the number of bits of the image to be reproduced. The information processing apparatus according to claim 1, wherein the setting unit is configured to acquire and set a setting value of the number of bits of the reproduction target image. The setting unit sets the setting value by executing BD-J using a BD-J (Blu-ray Disc Java) API (Application Programming Interface) class that instructs setting of the setting value. The information processing apparatus according to claim 3. The information processing apparatus according to claim 4, wherein the class is configured to have a function of an HGraphicsConfiguration class. By executing BD-J using a BD-J (Blu-ray Disc Java) API (Application Programming Interface) class that instructs acquisition of the number of bits set by the setting unit, the setting unit The information processing apparatus according to claim 1, further comprising: an acquisition unit that acquires the set number of bits. Information processing device
A setting step for setting the number of bits of the image to be reproduced;
A generation step of generating the reproduction target image having the number of bits set by the setting step. Computer
A setting section for setting the number of bits of the image to be reproduced;
A program for functioning as a generation unit that generates the reproduction target image having the number of bits set by the setting unit. A recording medium on which information for instructing the setting of the number of bits of an image to be reproduced is recorded, attached to an information processing apparatus, and reproduced.
A recording medium that causes the information processing apparatus that has acquired the information to set the number of bits of the reproduction target image and to generate the reproduction target image having the set number of bits. An information processing apparatus comprising: a generation unit that generates a file including information that instructs setting of the number of bits of an image to be reproduced. A setting section for setting the color gamut of the image to be played,
An information processing apparatus comprising: a generation unit that generates the reproduction target image of the color gamut set by the setting unit. The information processing apparatus according to claim 11, wherein the setting unit is configured to acquire and set an initial value of the color gamut of the reproduction target image. The information processing apparatus according to claim 11, wherein the setting unit is configured to acquire and set a setting value of the color gamut of the reproduction target image. The setting unit sets the setting value by executing BD-J using a BD-J (Blu-ray Disc Java) API (Application Programming Interface) class that instructs setting of the setting value. The information processing apparatus according to claim 13. The information processing apparatus according to claim 14, wherein the class is configured to have a function of an HGraphicsConfigurationTemplate class. By executing BD-J using a BD-J (Blu-ray Disc Java) API (Application Programming Interface) class that instructs acquisition of the color gamut set by the setting unit, the setting unit The information processing apparatus according to claim 11, further comprising: an acquisition unit that acquires the set color gamut. 17. The acquisition unit is configured to acquire the color gamut by expressing an API (Application Programming Interface) class of BD-J (Blu-ray Disc Java) expressing the plurality of the color gamuts. The information processing apparatus described in 1. The information processing apparatus according to claim 17, wherein the plurality of color gamuts are configured to be BT.709 and BT.2020.

Images