WO2017061297A1 - Information processing device and information processing method - Google Patents

Abstract

The present disclosure relates to an information processing device and an information processing method that make it possible to appropriately display HDR content. HDR parameters comprising HDR content attributes and characteristic information of a display used at the time of content creation are described for each Adaptation Set, for example, of an MPD file. The HDR content attributes include, at least, the content EOTF, the maximum brightness included in the content, the average brightness of the content, and an identifier if the same EOTF but different application. The present disclosure can be applied to an information processing system that distributes video content, for example.

Description

Information processing apparatus and information processing method

The present disclosure relates to an information processing device and an information processing method, and more particularly, to an information processing device and an information processing method capable of appropriately displaying HDR content.

In recent years, the mainstream streaming service on the Internet has become OTT-V (Over The Top Video). MPEG-DASH (Moving / Picture / Experts / Group / phase / Dynamic / Adaptive / Streaming / over / HTTP) is beginning to spread as the basic technology (for example, see Non-Patent Document 1).

In MPEG-DASH, the distribution server prepares an encoded stream with a different bit rate for a single video content, and the playback terminal requests an encoded stream with an optimal bit rate, thereby realizing adaptive streaming distribution. Is done. In MPEG-DASH, the video and audio information to be distributed is described in an MPD (Media Presentation Description) file, and the terminal acquires the MPD file from the server and plays it by looking at the described information. It is possible to determine which is the most suitable encoded stream and obtain it.

On the other hand, HDR (High Dynamic Range) is an image display technology that has been attracting attention in recent years. Color gradation can be expressed more richly than conventional SDR (Standard Dynamic Range). Since the color gradation that can be displayed on the display unit of the playback terminal varies depending on the display unit, when trying to distribute the HDR content in MPEG-DASH, the distribution server prepares HDR content with a plurality of luminance levels. .

MPEG-DASH (Dynamic-Adaptive-Streaming-over-HTTP) (URL: http://mpeg.chiariglione.org/standards/mpeg-dash/media-presentation-description-and-segment-formats/text-isoiec-23009-12012-dam -1)

However, there is no description about HDR contents in the current MPD file, and it is difficult for the client to determine which HDR content has the optimal brightness.

This disclosure has been made in view of such a situation, and can appropriately display HDR content.

An information processing apparatus according to an aspect of the present technology describes an HDR parameter including at least information related to luminance of HDR (High Dynamic Range) content, and generates a management file that is a file for managing the encoded stream of the HDR content A file generation unit is provided.

The file generation unit can describe the HDR parameter in Representation or AdaptationSet of the management file.

The information relating to the brightness of the HDR content includes at least one of a table for converting light and electric signals, the maximum brightness included in the HDR content, and the average brightness of the HDR content.

The information regarding the brightness of the HDR content includes an identifier when the table is the same but the application is different.

The HDR parameter includes display characteristic information used when creating the HDR content.

The display characteristic information includes at least one of coordinates of a color space that can be displayed by the display, coordinates of a white point on the color space of the display, maximum luminance of the display, and minimum luminance of the display.

An information processing method according to an aspect of the present technology is a file in which an information processing device describes an HDR parameter including at least information on luminance of HDR (High Dynamic Range) content and manages an encoded stream of the HDR content Generate a management file.

An information processing apparatus according to another aspect of the present technology describes an HDR parameter including at least information related to brightness of HDR (High Dynamic Range) content, and obtains a management file that is a file for managing the encoded stream of the HDR content And a selection unit that selects the HDR content corresponding to the display unit using the HDR parameter of the management file acquired by the acquisition unit.

The HDR parameter is described in Representation or AdaptationSet of the management file.

The information relating to the brightness of the HDR content includes at least one of a table for converting light and electric signals, the maximum brightness included in the HDR content, and the average brightness of the HDR content.

The information regarding the brightness of the HDR content includes an identifier when the table is the same but the application is different.

The HDR parameter includes display characteristic information used when creating the HDR content.

The display characteristic information includes at least one of coordinates of a color space that can be displayed by the display, coordinates of a white point on the color space of the display, maximum luminance of the display, and minimum luminance of the display.

A luminance compression unit that compresses the luminance of the HDR content when the luminance of the HDR content exceeds the display range of the display unit can be further provided.

The display unit can be further provided.

The display unit is externally connected via a connection unit, and transmits a performance information acquisition unit that acquires performance information of the display unit and an HDR parameter corresponding to the HDR content selected by the selection unit And the selecting unit can select the HDR content corresponding to the display unit using the performance information acquired by the performance information acquiring unit.

An information processing method according to another aspect of the present technology is a file in which an information processing apparatus describes an HDR parameter including at least information on luminance of HDR (High Dynamic Range) content and manages an encoded stream of the HDR content. A certain management file is acquired, and the HDR content corresponding to the display unit is selected using the HDR parameter of the acquired management file.

In one aspect of the present technology, an HDR parameter including at least information regarding luminance of HDR (High Dynamic Range) content is described, and a management file that is a file for managing the encoded stream of the HDR content is generated.

In another aspect of the present technology, a management file, which is a file for managing an encoded stream of the HDR content, is described by describing an HDR parameter including at least information on brightness of HDR (High Dynamic Range) content. Then, the HDR content corresponding to the display unit is selected using the HDR parameter of the acquired management file.

According to this technology, HDR content can be displayed appropriately.

Note that the effects described in the present specification are merely examples, and the effects of the present technology are not limited to the effects described in the present specification, and may have additional effects.

It is a block diagram showing an example of composition of an embodiment of an information processing system to which this indication is applied. It is a figure which shows the example of the code value and display brightness | luminance in HDR and SDR. It is a figure which shows the example in the case of delivering HDR content by MPEG-DASH. It is a figure which shows the structural example of a HDR parameter. It is a figure which shows the color space which can be displayed in the color space which CIE defines. It is a figure which shows the example of white (reference value) in the color space which CIE defines. It is a figure which shows the example of XML description of the HDR parameter in MPD. It is a figure which shows the example of XML description of the HDR parameter in MPD. It is a figure which shows the example of XML description of the HDR parameter in MPD. It is a figure which shows the example of XML description of the HDR parameter in MPD. It is a figure which shows the example of description of the HDR parameter to MPD. It is a figure which shows the example of description of the HDR parameter to MPD. It is a figure which shows the example of description of the HDR parameter to MPD. It is a figure which shows the example of description of the HDR parameter to MPD. It is a block diagram which shows the structural example of the file generation apparatus of FIG. It is a flowchart explaining the content production | generation process of a file production | generation apparatus. It is a flowchart explaining the other example of the content production | generation process of a file production | generation apparatus. It is a block diagram which shows the structural example of a Web server in case the function of a file generation apparatus is included. It is a block diagram which shows the 1st structural example of a moving image reproduction terminal. FIG. 20 is a flowchart for describing playback processing of the video playback terminal of FIG. 19. FIG. It is a flowchart explaining the selection process of step S82 of FIG. It is a flowchart explaining the selection process of step S82 of FIG. It is a block diagram which shows the 2nd structural example of a moving image reproduction terminal. It is a flowchart explaining the reproduction | regeneration processing of the moving image reproduction terminal of FIG. It is a flowchart explaining the brightness | luminance compression process of step S147 of FIG. It is a block diagram which shows the 3rd structural example of a moving image reproduction terminal. 27 is a flowchart for explaining another example of the selection process in step S82 in FIG. 20 by the moving image reproduction terminal in FIG. 27 is a flowchart for explaining another example of the selection process in step S82 in FIG. 20 by the moving image reproduction terminal in FIG. And FIG. 16 is a block diagram illustrating a configuration example of a personal 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: Information processing system (FIGS. 1 to 28)
2. Second Embodiment: Computer (FIG. 29)

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

The information processing system 10 in FIG. 1 is configured by connecting a Web server 12 connected to a file generation device 11 and a moving image playback terminal 14 via the Internet 13.

In the information processing system 10, the Web server 12 distributes an encoded stream of HDR (High Dynamic Range) image moving image content (hereinafter also referred to as HDR content) to the moving image playback terminal 14 in a method in accordance with MPEG-DASH. .

The file generation device 11 of the information processing system 10 encodes an image at a plurality of encoding speeds (bit rates) to generate an encoded stream. The file generation device 11 generates an image file (for example, an MP4 file) by converting an encoded stream of each encoding speed into a file for each time unit of about several seconds to about 10 seconds called a segment.

The file generation device 11 encodes and encodes a plurality of different types of HDR images such as EOTF (Electro-Ortical Transfer Function), which is a table for converting light and electrical signals (that is, including luminance) and display luminance. Create a stream. The file generation device 11 converts each type of encoded stream into a file for each time unit of about several seconds to about 10 seconds called a segment, generates an image file, and records it on a recording medium. The file generation device 11 supplies the generated image file to the Web server 12 through a recorded recording medium or by uploading.

Further, the file generation device 11 (setting unit) generates an MPD file (management file) for managing image files and the like and records them on a recording medium. The file generation device 11 supplies the MPD file to the Web server 12 through a recorded recording medium or by uploading.

The Web server 12 stores the image file and the MPD file supplied from the file generation device 11. The web server 12 transmits the stored image file, MPD file, and the like to the video playback terminal 14 in response to a request from the video playback terminal 14.

The video playback terminal 14 includes streaming data control software (hereinafter referred to as control software) 21, video playback software 22, and client software (hereinafter referred to as access software) for HTTP (HyperText Transfer Protocol) access. 23) is executed.

The control software 21 is software that controls data streamed from the Web server 12. Specifically, the control software 21 causes the video playback terminal 14 to acquire an MPD file from the Web server 12.

Further, the control software 21 instructs the access software 23 to transmit a coded stream to be played, which is designated by the moving picture playing software 22, based on the MPD file.

The moving image reproduction software 22 is software for reproducing the encoded stream acquired from the Web server 12. Specifically, the moving image playback software 22 designates the encoded stream to be played back to the control software 21. Also, the moving image playback software 22 decodes the encoded stream received by the moving image playback terminal 14 when receiving a notification of reception start from the access software 23. The moving image reproduction software 22 synthesizes the image data obtained as a result of the decoding as necessary and outputs it.

The access software 23 is software that controls communication with the Web server 12 via the Internet 13 using HTTP. Specifically, the access software 23 causes the moving image playback terminal 14 to transmit a transmission request for the encoded stream to be played back included in the image file in response to a command from the control software 21. In response to the transmission request, the access software 23 causes the video playback terminal 14 to start receiving the encoded stream transmitted from the Web server 12 and supplies the video playback software 22 with a reception start notification. To do.

(Description of HDR content)
HDR is an image display technology that has attracted attention in recent years, and color gradation can be expressed richer than conventional SDR (Standard Dynamic Range).

The optical signal / electrical signal conversion table is called OETF (Ortical-Electron Transfer Function) or EOTF. In SDR, EOTF / OETF defined in ITU BT1886 was used. In HDR, for example, EOTF defined in SMPTE2084 is used.

FIG. 2 is a diagram showing examples of code values and display brightness in HDR and SDR.

Here, the value is expressed in RGB * bit regardless of whether it is HDR or SDR. For example, in the case of 10 bits, each pixel is R = 0 to 1023, G = 0 to 1023, B = 0 to 1023, and the meaning of each luminance is HDR and SDR as shown in FIG. Come different.

For example, SDR has a display brightness of 0 to 120 cd / m ² , HDR has a display brightness of 0 to 10000 cd / m ² , and the display brightness range is completely different.

Next, referring to FIG. 3, when distributing HDR contents by MPEG-DASH, the server 12 stores a plurality of types of HDR contents having different display luminances so that various clients can cope.

For example, the web server 12 in FIG. 3 includes SMPTE2084 with a maximum brightness of 400 nits, an average of 80 nits HDR content, BT1886 with a maximum brightness of 100 nits, an average of 30 nits HDR content, and SMPTE2084 with a maximum brightness of 1000 nits and an average of 400 nits HDR content is stored.

However, in the current MPD file, there is no description about the HDR content, and it is difficult for the client (video playback terminal 14) to determine which HDR content has the optimum brightness.

For example, the display unit of the video playback terminal 14-1 can display up to 500 nits with SMPTE2084. The display unit of the video playback terminal 14-2 can display a maximum of 300 nits using BT1886. The display unit of the video playback terminal 14-3 can display a maximum of 1000 nits using SMPTE2084. However, none of the moving image playback terminals 14-1 to 14-3 can determine which HDR content stored in the server 12 is optimal for itself or can be played back by itself.

Therefore, in this technology, the HDR parameter shown in FIG. 4 is added to the MPD file and used for determination. The HDR parameters are configured to include parameters for content attributes and parameters indicating what display was used to create the content.

Content attributes are:
・ EOTF: EOTF of the content
・ MAX CLL ・ ・ ・ Maximum brightness included in content ・ MAX FALL ・ ・ ・ Average brightness of content ・ HDR Profile ・ ・ ・ It consists of identifiers for the same EOTF but different applications.

Of the content attributes, EOTF, MAX CLL, MAX FALL are metadata specified in SMPTE2086.

The display characteristic information used when creating the content is
・ For (i = 0; i <3; i ++) {
Display primaries [x] ... x value (coordinates) of CIE color space that can be displayed on the display when content is created
Display primaries [y] ... y value (coordinates) of the CIE color space that can be displayed on the display when content is created
}
・ White Point [x] ... White Point x value (coordinates) on the CIE color space of the display when creating the content
・ White Point [y] ... White Point y value (coordinates) on the CIE color space of the display at the time of content creation
・ Max display mastering luminance The maximum brightness of the display when creating content ・ Min display mastering luminance The minimum display brightness when creating content.

“Display primaries” indicates the color space that can be displayed by a certain display, and by describing this in the MPD file, it is possible to determine what kind of display the content is created by viewing. As shown in FIG. 5, it can be determined that the display can be expressed as long as the color is inside the triangle in the color space defined by the CIE.

White point indicates where a certain display is designed to be expressed as white (color reference value). As shown in FIG. 6, it can be determined that the display is designed considering white (reference value) in the color space defined by the CIE.

By providing the above HDR parameters, if the maximum and minimum values are known, if the display (display unit) itself can produce a higher luminance than the content, the luminance will not be compressed, or if the content is high, the highest luminance will be compressed. In addition, it is possible to improve by mapping and compressing the highest luminance of the content.

Also, color reproduction can be used to match the reference white at the time of content creation (production), or to determine whether the color gamut can be reproduced by yourself.

Next, with reference to FIG. 7 to FIG. 10, an XML description method for description in the MPD file of the HDR parameter will be described. In the example of FIGS. 7 to 10, an example described in AdaptationSet will be described, but it may be described in Representation.

FIG. 7 is a diagram illustrating an example in which HDR parameters are directly described in the AdaptationSet in XML, similar to the frame rate and resolution of Video. In the example of FIG. 7, for example, the following HDR parameters are described in <AdaptationSet>.

<AdaptationSet
EOTF = ”BT1886”
HDRProfile = ”HDR10”
displayPrimariesX1 = ”0.123”
displayPrimariesY1 = ”0.553”
...
displayPrimariesX3 = ”0.844”
displayPrimariesY3 = ”0.992”
whitePointX = ”0.45”
whitePointY = ”0.41”
maxDisplayMasteringLuminance = ”4000”
maxDisplayMasteringLuminance = ”50”
MAXCLL = ”1000”
MAXFLL = ”139”
>
...
</ AdaptationSet>

In the example of FIG. 7, although described as an XML element, as shown in FIG. 8, the format is not particularly limited even if described as an XML attribute.

<AdaptationSet>
<MasterimgDisplayColorVolume EOTE = ”BT1886” HDRProfile = ”HDR10”>
<DisplayPrimaries1 x = ”0.123” y = ”0.533” />
<DisplayPrimaries2 x = ”0.223” y = ”0.466” />
<DisplayPrimaries3 x = ”0.844” y = ”0.992” />
<WhitePoint x = ”0.45” y = ”0.41” />
<DisplayMasteringLumminance max = ”4000”, min = ”50” />
<ContentHDRProperty MAXCLL = ”1000”, MAXFLL = ”139” />
</ MasterimgDisplayColorVolume>
</ AdaptationSet>

FIG. 9 is a diagram illustrating an indirect description example in which a URL is referred to in Property Description.
<AdaptationSet>
<SupplementalProperty chemeIdUri = ”urn: mpeg: mpegB: cicp * TransferCharacteristics” value = ”16” />
<SupplementalProperty chemeIdUri = ”urn: mpeg: mpegB: cicp * HDRProfile” value = ”HDR10” />
<SupplementalProperty chemeIdUri = ”urn: mpeg: mpegB: cicp * displayPrimaries” value = ”0.123” />
...
<SupplementalProperty chemeIdUri = ”urn: mpeg: mpegB: cicp * whitPointX” value = ”0.45” />
<SupplementalProperty chemeIdUri = ”urn: mpeg: mpegB: cicp * whitPointY” value = ”0.41” />
<SupplementalProperty chemeIdUri = ”urn: mpeg: mpegB: cicp * DisplayMasteringLumminance” value = ”4000” />
...
</ AdaptationSet>

As shown in FIG. 10, an element may be created in SupplementalProperity.
<AdaptationSet>
<SupplementalProperty chemeIdUri = ”urn: mpeg: mpegB: cicp: HDRProperties” value = ”0” />
<MasteringDisplayColorVolume EOTF = “BT1886” HDRProfile = ”HDR10”>
<DisplayPrimaries1 x = ”0.123” y = ”0.533” />
<DisplayPrimaries2 x = ”0.223” y = ”0.466” />
<DisplayPrimaries3 x = ”0.844” y = ”0.992” />
<WhitePoint x = ”0.45” y = ”0.41” />
<DisplayMasteringLumminance max = ”4000”, min = ”50” />
<ContentHDRProperty MAXCLL = ”1000”, MAXFLL = ”139” />
</ MasterimgDisplayColorVolume>
</ SupplementalProperty>
</ AdaptationSet>

FIGS. 11 to 14 are diagrams showing an example of a method for describing the HDR parameters described in XML described above with reference to FIGS. 7 to 10 in the MPD file. As shown in FIG. 11, the HDR parameter may be described for each AdaptationSet in the XML description of FIG. Further, as shown in FIG. 12, the HDR parameter may be described in the representation in the XML description of FIG. Further, any position may be used as long as the representation can be finally identified.

Further, as shown in FIG. 13, the HDR parameter may be described in the XML description of FIG. 9 that is indirectly described by referring to the URL by Property Description in <AdaptationSet>. Furthermore, as shown in FIG. 14, the HDR parameter may be described in the XML description of FIG. 9 that is indirectly described by referring to the URL in Property Description in <Representation>.

Further, although not shown, the HDR parameter may be described in the XML description of FIGS. 8 and 10 for each AdaptationSet, or may be described in the Representation in the XML description of FIGS. 7 and 10. May be. That is, the HDR parameter may be described in the AdaptationSet or Representation in any of the XML descriptions in FIGS.

(Configuration example of file generator)
FIG. 15 is a block diagram illustrating a configuration example of the file generation device in FIG.

In the example of FIG. 15, the file generation device 11 includes an input unit 51, a control unit 52, a drive 53, a memory 54, a multiplexing unit 55, recording units 56-1 and 56-2, and recording units 57-1 and 57. -2 is included.

The input unit 51 receives information corresponding to a user operation and supplies it to the control unit 52. The control unit 52 is a program that performs an operation according to information from the input unit 51, and functions as a file generation unit when controlling each unit of the file generation device 11 and generating a file. The drive 53 is, for example, a port for connecting a hard disk or the like, and connects the recording units 56-1 and 56-2, the recording units 57-1 and 57-2, and the control unit 52. The memory 54 temporarily stores data.

The multiplexing unit 55 includes a subtitle reading unit 71, a video reading unit 72, an audio reading unit 73, and a MUX 74. The multiplexing unit 55 reads video, audio, and subtitles from the recording unit 56-1 or 56-2 and multiplexes them. Do. The multiplexed data is recorded in the recording unit 57-1 or 57-2 via the control unit 52.

The subtitle reading unit 71 reads subtitle data from the recording unit 56-1 or 56-2 and supplies it to the MUX 74. The video reading unit 72 reads the video data from the recording unit 56-1 or 56-2 and supplies the video data to the MUX 74. The audio reading unit 73 reads audio data from the recording unit 56-1 or 56-2 and supplies the audio data to the MUX 74.

The MUX 74 multiplexes subtitle data, video data, and audio data into, for example, an MP4 file.

The recording units 56-1 and 56-2 are, for example, recording media such as a hard disk, and record video, audio, and subtitle data before multiplexing. Note that the recording unit 56-1 is built in the file generation device 11, and the recording unit 56-2 is externally attached to the file generation device 11. The recording units 56-1 and 56-2 do not need to be two, and it is sufficient that at least one of them is present.

Recording units 57-1 and 57-2 are recording media such as hard disks, and record multiplexed data in which video data, audio data, and caption data are multiplexed. Note that the recording unit 57-1 is built in the file generation device 11, and the recording unit 57-2 is externally attached to the file generation device 11. The recording units 57-1 and 57-2 do not need to be two, and at least one of them is sufficient, and when there is no need to distinguish between them, they are referred to as the recording unit 57.

(Processing example of file generator)
Next, content generation processing of the file generation device 11 will be described with reference to the flowchart of FIG.

In step S11, the control unit 52 records pre-multiplexed data (video, audio, subtitles) in the recording unit 56 for content creation. If data is recorded in advance, step S11 is skipped.

In step S12, the control unit 52 controls the multiplexing unit 55, reads data (video, audio, subtitle) from the recording unit 56, performs multiplexing, and generates a multiplexed file (for example, an MP4 file). .

In step S13, the control unit 52 determines whether or not Mastering Display Color Color Volume SEI is present in the video stream. If it is determined in step S13 that Mastering Display Color Volume SEI exists, the process proceeds to step S14. This is because the same information as the HDR parameter described in the MPD is included in the Mastering Display Color Volume SEI.

In step S14, the control unit 52 stores, in the memory 54, information (EOTF, MAXFALL, MAXCLL and display information used at the time of content creation) necessary for HDR parameters in Mastering / Display / Color / Volume / SEI as HDR parameters. .

If it is determined in step S13 that Mastering Display Color Volume SEI does not exist, the process proceeds to step S15. In step S15, the control unit 52 reads the video data, determines EOTF, MAXFALL, MAXCLL, and stores them in the memory 54 as HDR parameters. EOTF is obtained from, for example, TransferCharacteristics of hevc video, MAXFALL and MAXCLL look at all pixel values, and store the average value and maximum brightness in memory 54.

After step S14 or S15, the process proceeds to step S16. In step S <b> 16, the control unit 52 determines whether there is an input from the input unit 51 based on a user operation. If there is insufficient information or there is an addition such as HDR Profile, it is determined in step S16 that there is an input, and the process proceeds to step S17.

In step S17, the control unit 52 records information corresponding to the input in the memory 54. Note that the HDR parameter of the memory 54 is overwritten and appended as necessary.

If it is determined in step S16 that there is no input, step S17 is skipped, and the process proceeds to step S18. In step S18, the control unit 52 describes the HDR parameter recorded in the memory 54 in the MPD (file) and records it in the recording unit 56.

In this content generation process, an example in which pre-multiplexed video, audio, and subtitles are prepared and multiplexed on the file generation device 11 to generate an MPD has been described, but a previously multiplexed file (for example, An example of preparing an MPD file and generating an MPD is described below.

Next, another example of content generation processing of the file generation device 11 will be described with reference to the flowchart of FIG.

In step S51, the control unit 52 reads the multiplexed MP4 file from the recording unit 57. In step S52, the control unit 52 determines whether an HDR parameter is present in the MP4 header. If it is determined in step S52 that the HDR parameter does not exist, the process proceeds to step S53.

In step S53, the control unit 52 determines whether or not Mastering Display Color Color Volume SEI is present in the video stream. If it is determined in step S53 that Mastering Display Color Volume SEI exists, the process proceeds to step S54.

In step S54, the control unit 52 stores, in the memory 54, information (EOTF, MAXFALL, MAXCLL and display information used at the time of content creation) necessary for HDR parameters in Mastering / Display / Color / Volume / SEI as HDR parameters. The process proceeds to step S56.

If it is determined in step S53 that Mastering Display Color Volume SEI does not exist, the process proceeds to step S55. In step S55, the control unit 52 reads the video data, determines EOTF, MAXFALL, MAXCLL, and stores them in the memory 54 as HDR parameters. EOTF is acquired from, for example, TransferCharacteristics of HEVC video, and MAXFALL and MAXCLL look at the pixel values and store the average value and the maximum brightness in the memory 54.

On the other hand, if it is determined in step S52 that the HDR parameter exists, the process proceeds to step S56. In step S56, the control unit 52 records the HDR parameter of the header in the memory 54.

After steps S54 to S56, the process proceeds to step S57. In step S <b> 57, the control unit 52 determines whether there is an input from the input unit 51 based on a user operation. If there is insufficient information or there is an addition such as HDR profile, it is determined in step S57 that there is an input, and the process proceeds to step S58.

In step S58, the control unit 52 stores information corresponding to the input in the memory 54. Note that the HDR parameter of the memory 54 is overwritten and appended as necessary.

If it is determined in step S57 that there is no input, step S58 is skipped, and the process proceeds to step S59. In step S59, the control unit 52 writes the HDR parameter stored in the memory 54 in the MPD (file) and records it in the recording unit 56.

(Server configuration example)
FIG. 18 is a block diagram illustrating a configuration example of the Web server 12 in the case where the function of the file generation device 11 of FIG. 15 is included. 18 includes an input unit 51, a control unit 52, a drive 53, a memory 54, a multiplexing unit 55, recording units 56-1 and 56-2, and recording units 57-1 and 57-2. The points including are common to the file generation device 11 of FIG.

18 is different from the file generation device 11 in FIG. 15 in that a network connection unit 91 is added. The network connection unit 91 is, for example, a network port, is connected to the Internet 13 via the control unit 52, and transmits / receives data (MPD file or HDR content) to / from the video playback terminal 14 via the Internet 13. Do.

That is, except for the network connection unit 91, the configuration is basically the same as that of the file generation device 11 of FIG. 15, and the content generation processing is basically the same as the processing described above with reference to FIGS. The description is omitted.

(Configuration example of video playback terminal)
FIG. 19 is a block diagram illustrating a first configuration example of the video playback terminal 14 of FIG.

In the example of FIG. 19, the moving image playback terminal 14 is configured to include an input unit 101, a control unit 102, a memory 103, a playback unit 104, a display unit 105, and a speaker 106. Note that the control unit 102 and the playback unit 104 are realized when the video playback terminal 14 in FIG. 1 executes the control software 21, the video playback software 22, and the access software 23.

The input unit 101 receives information corresponding to a user operation and supplies the information to the control unit 102. The control unit 102 is a program that performs an operation and control determination according to information from the input unit 101, and controls each unit of the video playback terminal 14. The memory 103 temporarily stores data.

The playback unit 104 is configured to include a data acquisition unit 121, a read buffer 122, a DeMUX 123, a caption generation unit 124, a video generation unit 125, an audio generation unit 126, and a display data generation unit 127.

The data acquisition unit 121 acquires data (MPD file or HDR content) from the Web server 12 via the Internet 13 and temporarily stores the acquired data in the read buffer 122. The read buffer 122 temporarily stores the data acquired by the data acquisition unit 121.

The DeMUX 123 decomposes and takes out video data, audio data, and caption data from a multiplexed file such as MP4. The DeMUX 123 outputs the extracted subtitle data to the subtitle generation unit 124, outputs the extracted video data to the video generation unit 125, and outputs the extracted audio data to the audio generation unit 126.

The subtitle generation unit 124 is a subtitle decoder, decodes subtitle data, and outputs the decoded subtitle data to the display data generation unit 127. The video generation unit 125 is a video decoder, decodes the video data, and outputs the decoded video data to the display data generation unit 127. The audio generation unit 126 is an audio decoder, and outputs the decoded audio data to the speaker 106.

The display data generation unit 127 generates display data by superimposing the subtitle corresponding to the subtitle data and the image corresponding to the video data, and outputs the generated display data to the display unit 105.

The display unit 105 outputs an image corresponding to the display data from the display data generation unit 127. The speaker 106 outputs sound corresponding to the audio data from the audio generation unit 126.

(Example of video playback terminal processing)
Next, the playback process of the video playback terminal 14 will be described with reference to the flowchart of FIG.

In step S81, in response to an input from the input unit 101, the control unit 102 causes the data acquisition unit 121 to acquire the MPD file from the Web server 12 via the Internet 13. The data acquisition unit 121 acquires an MPD file and stores the acquired MPD file in the memory 103 via the control unit 102.

In step S82, the control unit 102 performs representation selection processing described in the MPD. This selection process will be described later with reference to FIG. The HDR content corresponding to Representation is selected by the selection process in step S82.

In step S83, the data acquisition unit 121 acquires the HDR content selected in step S82, and temporarily stores the acquired data in the read buffer 122. The read buffer 122 temporarily stores the data acquired by the data acquisition unit 121.

In step S84, the DeMUX 123 decomposes and extracts video data, audio data, and caption data from the multiplexed file such as MP4 stored in the buffer 122. In step S85, the video generation unit 125, the audio generation unit 126, and the display data generation unit 127 decode (decode) each data.

That is, the caption generation unit 124 decodes the caption data and outputs the decoded caption data to the display data generation unit 127. The video generation unit 125 decodes the video data and outputs the decoded video data to the display data generation unit 127. The audio generation unit 126 is an audio decoder, and outputs the decoded audio data to the speaker 106.

In step S86, the display data generation unit 127 generates display data by superimposing the subtitle corresponding to the subtitle data and the image corresponding to the video data, and outputs the generated display data to the display unit 105.

In step S87, the display unit 105 outputs an image corresponding to the display data from the display data generation unit 127. The speaker 106 outputs sound corresponding to the audio data from the audio generation unit 126.

Next, the selection process in step S82 in FIG. 20 will be described with reference to the flowcharts in FIGS.

In step S101, the control unit 102 parses the MPD in the memory 103 and reads the HDR parameter.

In step S102, the control unit 102 determines whether or not all AdaptationSets have been checked. If it is determined that they have been checked, the control unit 102 proceeds to step S103. In step S103, the control unit 102 selects Representation of the recorded id, and the selection process ends.

On the other hand, if it is determined in step S102 that all AdaptationSets have not been checked yet, the process proceeds to step S104. In step S104, the control unit 102 checks the contents of the unchecked AdaptationSet.

In step S105, the control unit 102 determines whether or not all representations have been checked. If it is determined in step S105 that all representations have been checked, the process returns to step S102, and the subsequent processes are repeated.

If it is determined in step S105 that not all representations have been checked, the process proceeds to step S106. In step S106, the control unit 102 determines whether or not the EOTF can be displayed.

If it is determined in step S106 that EOTF can be displayed, the process proceeds to step S107. In step S107, the control unit 102 determines whether the HDRProfile can be displayed. If it is determined in step S107 that the HDRProfile can be displayed, the process proceeds to step S108.

If it is determined in step S106 that the EOTF is not displayable, or if it is determined in step S107 that the HDRProfile is not displayable, the process returns to step S105, and the subsequent processes are repeated.

In step S108, the control unit 102 determines whether or not the Representation id is already recorded in the memory 103. If it is determined in step S108 that Representation id is not recorded in the memory 103, the process proceeds to step S109. In step S <b> 109, the control unit 102 records Representation id in the memory 103. If it is determined in step S108 that Representation id is recorded in the memory 103, step S109 is skipped.

After step S109, the process proceeds to step S110 in FIG. In step S <b> 110, the control unit 102 determines whether Max display mastaering luminance and Min display mastaering luminance are within the display range of the display unit 105. If it is determined in step S110 that Max display mastaering luminance and Min display mastaering luminance are within the display range of the display unit 105, the process proceeds to step S111.

In step S111, the control unit 102 determines whether or not MAX FALL (average) is within the display range of the display unit 105, and determines that MAX 場合 FALL (average) is within the display range of the display unit 105. The process proceeds to step S112. In step S <b> 112, the control unit 102 determines whether or not MAXLLCLL (maximum) is within the display range of the display unit 105, and determines that MAXLLCLL (maximum) is within the display range of the display unit 105. The process proceeds to step S113.

In step S113, the control unit 102 determines whether or not Display 否 primaries is within the display range of the display unit 105. If the control unit 102 determines that Display primaries is within the display range of the display unit 105, the process is as follows. Proceed to step S114.

In step S114, the control unit 102 determines whether White space is closer to the device itself than the currently recorded Representation, and determines that White space is closer to the device itself than the currently recorded Representation. Advances to step S115.

In step S115, the control unit 102 records the Representation ID determined to be close to the device itself in the memory 103, the process returns to step S105, and the subsequent processes are repeated.

On the other hand, if it is determined in step S110 that Max display mastaering luminance and Min display mastaering luminance are not within the display range of the display unit 105, the subsequent processing is skipped, and the processing returns to step S105 and thereafter. The process is repeated.

When it is determined in step S111 that MAX FALL (average) is not within the display range of display unit 105, or in step S112, it is determined that MAX CLL (maximum) is not within the display range of display unit 105. In this case, the subsequent processing is skipped, the processing returns to step S105, and the subsequent processing is repeated.

If it is determined in step S113 that Display primaries are not within the display range of display unit 105, or if it is determined in step S114 that White space is not closer to the device itself than the currently recorded representation. The subsequent processing is skipped, the processing returns to step S105, and the subsequent processing is repeated.

As described above, the optimum HDR content for the display range of the display unit 105 is selected.

Even if all the AdaptationSet checks are completed, if Representation id is not recorded in Step S103 (that is, there is no selectable content), the display unit 105 displays that there is no selectable content. You may be made to do.

(Configuration example of video playback terminal)
FIG. 23 is a block diagram illustrating a second configuration example of the video playback terminal 14 of FIG. 23 is common to the video playback terminal 14 in FIG. 19 in that the video playback terminal 14 in FIG. 23 includes an input unit 101, a control unit 102, a memory 103, a playback unit 104, a display unit 105, and a speaker 106. .

23 is different from the moving image reproduction terminal 14 of FIG. 19 in that a luminance compression unit 151 is added.

That is, the display data generation unit 127 generates display data by superimposing the subtitle corresponding to the subtitle data and the image corresponding to the video data, and outputs the generated display data to the luminance compression unit 151.

For the Representation selected by the selection process, the luminance compression unit 151 does not display Max display mastaering luminance and Min display mastaering luminance within the display range of the display unit 105, but MAX FALL (average) is the display range of the display unit 105. If MAX CLL (maximum) is not within the display range of the display unit 105, the possibility of exceeding the display capability of the display unit 105 appears. Therefore, the luminance is compressed.

As a compression method, for example, there is a method in which brightness that can be displayed on the display unit 105 is assigned to MAXCLL to compress luminance. Specifically, when a display with a maximum brightness of 500 nits displays content with MAXCLLnit1000 nits, the brightness of all pixels is compressed to half the brightness and the content is displayed.

For example, there is a method of compressing the brightness by assigning the maximum displayable brightness of the display unit 105 to MAXFALL. Specifically, for example, if the display having the maximum brightness of 200 nits displays content of MAXCLLnit1000 nits and MAXFALL 400 nits, the content is displayed with the brightness of all pixels compressed to half the brightness. For example, pixels that are brighter than the display unit 105 are displayed at their maximum value of 200 nits.

In addition, regarding the color space, even if the content is created in a wider color gamut than the terminal (client) can display, the color in any space is acceptable if Display で あ れ ば praimaries can be displayed by the client. No adjustment is made.

(Example of video playback terminal processing)
Next, with reference to the flowchart of FIG. 24, the playback process of the video playback terminal 14 will be described. Note that steps S141 to S146 in FIG. 24 perform basically the same processing as steps S81 to S86 in FIG. 20, and thus description thereof is omitted.

In step S146, the display data generation unit 127 generates display data by superimposing the subtitle corresponding to the subtitle data and the image corresponding to the video data, and outputs the generated display data to the luminance compression unit 151.

In step S147, the luminance compression unit 151 performs luminance compression processing on the representation selected by the selection processing in step S142. The details of the luminance compression processing in step S147 will be described later with reference to FIG. 25, but with this luminance compression processing, the luminance compression unit 151 outputs the display data subjected to the luminance compression processing to the display unit 105.

In step S148, the display unit 105 outputs an image corresponding to the display data from the display data generation unit 127. The speaker 106 outputs sound corresponding to the audio data from the audio generation unit 126.

Next, the luminance compression processing in step S147 in FIG. 24 will be described with reference to the flowchart in FIG.

In step S151, the control unit 102 parses the MPD. In step S152, the control unit 102 selects one representation, that is, the representation selected in step S142 in FIG.

In step S 153, the control unit 102 determines whether Max display mastaering luminance and Min display mastaering luminance are within the display range of the display unit 105. If it is determined in step S153 that Max display mastaering luminance and Min display mastaering luminance are not within the display range of the display unit 105, the process proceeds to step S154.

In step S154, the control unit 102 determines whether or not MAX FALL (average) is within the display range of the display unit 105, and determines that MAXALLFALL (average) is not within the display range of the display unit 105. The process proceeds to step S155. In step S155, the control unit 102 determines whether or not MAX 否 CLL (maximum) is within the display range of the display unit 105, and determines that MAX CLL (maximum) is not within the display range of the display unit 105. The process proceeds to step S156.

In step S156, the luminance compression unit 151 compresses the luminance of the display data generated by the display data generation unit 127 under the control of the control unit 102. The luminance compression unit 151 outputs the display data subjected to the luminance compression processing to the display unit 105.

On the other hand, when it is determined in step S153 that Max display mastaering luminance and Min display mastaering luminance are within the display range of the display unit 105, MAX FALL (average) is within the display range of the display unit 105 in step S154. If it is determined that there is, or if it is determined in step S155 that MAX CLL (maximum) is within the display range of the display unit 105, the subsequent processing is skipped, and the luminance compression processing in FIG. The

In the above description, the example in which the video playback terminal 14 includes a display device has been described. However, the present technology does not include a display device, that is, the video playback terminal 14 that includes an external display device. It can also be applied to.

(Configuration example of video playback terminal)
FIG. 26 is a block diagram showing a third configuration example of the video playback terminal 14 of FIG. 26 is the same as the video playback terminal 14 in FIG. 19 in that the video playback terminal 14 in FIG. 26 includes an input unit 101, a memory 103, and a playback unit 104.

26, the control unit 102 is replaced with the control unit 201, the display unit 105 is replaced with the external display unit 202, and the speaker 106 is replaced with the external speaker 203. This is different from the video playback terminal 14 in FIG.

That is, the video playback terminal 14 does not include a display unit and a speaker, and the display unit 202 and the speaker 203 are connected and externally connected according to the HDMI (registered trademark) 2.0a standard, for example, as indicated by a solid line. ing.

The control unit 201 acquires, for example, a data block called EDID defined in the CEA 861, and acquires the performance of the display unit 202, that is, information on what HDR parameters the display unit 202 can handle. The control unit 201 parses the MPD, compares the HDR parameter described in the MPD with the performance of the display unit 202, and selects an optimum representation for the display unit 202.

The control unit 201 extracts the HDR parameter of the representation selected by the MPD, and describes the HDR parameter in a packet specified in the CEA 861, for example, and transmits it to the display unit 202.

(Example of video playback terminal processing)
Note that the playback processing of the moving image playback terminal 14 in FIG. 26 differs only in the selection processing in step S82 in FIG. 20, and otherwise performs the same processing basically. Therefore, only the selection process which is a different part will be described next with reference to the flowcharts of FIGS. 27 and 28.

In step S201, the control unit 201 acquires, for example, a data block called EDID defined in the CEA 861, and acquires the performance of the display unit 202, that is, information on what HDR parameter the display unit 202 can handle.

In step S202, the control unit 201 parses the MPD in the memory 103 and reads the HDR parameter.

In step S203, the control unit 201 determines whether or not all AdaptationSets have been checked. If it is determined that they have been checked, the control unit 201 proceeds to step S204. In step S204, the control unit 102 selects Representation of the recorded id.

In step S205, the control unit 201 sends the representation HDR parameter selected in step S204 to the display unit 202, and the selection process ends.

On the other hand, if it is determined in step S203 that all AdaptationSets have not been checked yet, the process proceeds to step S206. The subsequent steps S206 to S217 in FIG. 27 and FIG. 28 perform basically the same processing as steps S104 to S115 in FIG. 21 and FIG.

As described above, according to the present technology, when HDR content is distributed by MPEG-DASH, the client can select content having the optimum brightness for himself and can display the HDR content appropriately.

That is, according to the present technology, the HDR content can be distributed by MPEG-DASH.

<Personal computer>
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 a computer incorporated in dedicated hardware, a general-purpose personal computer capable of executing various functions by installing various programs, and the like.

FIG. 29 is a block diagram showing a hardware configuration example of a personal computer that executes the above-described series of processing by a program.

In the personal computer 900, a CPU (Central Processing Unit) 901, a ROM (Read Only Memory) 902, and a RAM (Random Access Memory) 903 are connected to each other by a bus 904.

An input / output interface 905 is further connected to the bus 904. An input unit 906, an output unit 907, a storage unit 908, a communication unit 909, and a drive 910 are connected to the input / output interface 905.

The input unit 906 includes a keyboard, a mouse, a microphone, and the like. The output unit 907 includes a display, a speaker, and the like. The storage unit 908 includes a hard disk, a nonvolatile memory, and the like. The communication unit 909 includes a network interface or the like. The drive 910 drives a removable medium 911 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory.

In the personal computer 900 configured as described above, the CPU 901 loads, for example, a program stored in the storage unit 908 to the RAM 903 via the input / output interface 905 and the bus 904 and executes the program. Thereby, the series of processes described above are performed.

The program executed by the computer (CPU 901) can be provided by being recorded on the removable medium 911. The removable media 911 is a package made of, for example, a magnetic disk (including a flexible disk), an optical disk (CD-ROM (Compact Disc-Read Disc Only), DVD (Digital Versatile Disc), etc.), a magneto-optical disc, or a semiconductor memory. Media. Alternatively, 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, the program can be installed in the storage unit 908 via the input / output interface 905 by attaching the removable medium 911 to the drive 910. The program can be received by the communication unit 909 via a wired or wireless transmission medium and installed in the storage unit 908. In addition, the program can be installed in the ROM 902 or the storage unit 908 in advance.

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

Further, in the present specification, the step of describing the program recorded on the recording medium is not limited to the processing performed in chronological order according to the described order, but may be performed in parallel or It also includes processes that are executed individually.

In addition, in this specification, the system represents the entire apparatus composed of a plurality of devices (apparatuses).

Note that the embodiments in the present disclosure are not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present disclosure.

For example, the present disclosure can take a cloud computing configuration in which one function is shared by a plurality of devices via a network and is jointly processed.

Also, in the above, the configuration described as one device (or processing unit) may be divided and configured as a plurality of devices (or processing units). Conversely, the configurations described above as a plurality of devices (or processing units) may be combined into a single device (or processing unit). Of course, a configuration other than that described above may be added to the configuration of each device (or each processing unit). Furthermore, if the configuration and operation of the entire system are substantially the same, a part of the configuration of a certain device (or processing unit) may be included in the configuration of another device (or other processing unit). . That is, the present technology is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present technology.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the disclosure is not limited to such examples. It is obvious that various changes and modifications can be conceived within the scope of the technical idea described in the claims if the person has ordinary knowledge in the technical field to which the present disclosure belongs. Of course, it is understood that it belongs to the technical scope of the present disclosure.

In addition, this technique can also take the following structures.
(1) An information processing apparatus comprising: a file generation unit that describes an HDR parameter that includes at least information about luminance of HDR (High Dynamic Range) content and generates a management file that is a file for managing an encoded stream of the HDR content .
(2) The information processing apparatus according to (1), wherein the file generation unit describes the HDR parameter in Representation or AdaptationSet of the management file.
(3) The information regarding the luminance of the HDR content includes at least one of a table for converting light and an electrical signal, the maximum luminance included in the HDR content, and the average luminance of the HDR content. (1) or (2 ).
(4) The information regarding the brightness of the HDR content includes an identifier when the table is the same but is a different application. The information processing apparatus according to any one of (1) to (3) .
(5) The information processing apparatus according to any one of (1) to (4), wherein the HDR parameter includes display characteristic information used when creating the HDR content.
(6) The display characteristic information includes at least one of coordinates of a color space that can be displayed by the display, coordinates of a white point on the color space of the display, maximum luminance of the display, and minimum luminance of the display. The information processing apparatus according to (5).
(7) Information processing device
An information processing method for generating a management file, which is a file for managing an encoded stream of an HDR content, by describing an HDR parameter including at least information on brightness of HDR (High Dynamic Range) content.
(8) An acquisition unit that describes an HDR parameter including at least information on luminance of HDR (High Dynamic Range) content, and acquires a management file that is a file for managing the encoded stream of the HDR content;
An information processing apparatus comprising: a selection unit that selects HDR content corresponding to the display unit using the HDR parameter of the management file acquired by the acquisition unit.
(9) The information processing apparatus according to (8), wherein the HDR parameter is described in Representation or AdaptationSet of the management file.
(10) The information regarding the brightness of the HDR content includes at least one of a table for converting light and an electrical signal, a maximum brightness included in the HDR content, and an average brightness of the HDR content. (8) or (9 ).
(11) The information regarding the brightness of the HDR content includes an identifier when the table is the same but is a different application. The information processing apparatus according to any one of (8) to (10) .
(12) The information processing apparatus according to any one of (8) to (11), wherein the HDR parameter includes display characteristic information used when the HDR content is created.
(13) The display characteristic information includes at least one of coordinates of a color space that can be displayed by the display, coordinates of a white point on the color space of the display, maximum luminance of the display, and minimum luminance of the display. The information processing apparatus according to (12).
(14) The information processing according to any one of (8) to (13), further including a luminance compression unit that compresses the luminance of the HDR content when the luminance of the HDR content exceeds a display range of the display unit. apparatus.
(15) The information processing apparatus according to any one of (8) to (13), further including the display unit.
(16) The display unit is externally attached via a connection unit,
A performance information acquisition unit for acquiring performance information of the display unit;
A transmission unit that transmits an HDR parameter corresponding to the HDR content selected by the selection unit, and
The selection unit includes:
The information processing apparatus according to any one of (8) to (13), wherein the HDR content corresponding to the display unit is selected using the performance information acquired by the performance information acquisition unit.
(17) The information processing apparatus is
An HDR parameter including at least information related to brightness of HDR (High Dynamic Range) content is described, and a management file that is a file for managing the encoded stream of the HDR content is acquired,
An information processing method for selecting an HDR content corresponding to a display unit using an HDR parameter of an acquired management file.

10 Information processing system, 11 File generation device, 12 Web server, 13 Internet, 14, 14-1 to 14-3 Video playback terminal, 21 Control software, 22 Video playback software, 23 Access software, 51 Input Unit, 52 control unit, 53 drive, 54 memory, 55 multiplexing unit, 56-1, 56-2 recording unit, 57-1, 57-2 recording unit, 71 subtitle reading unit, 72 video reading unit, 73 audio reading Part, 74 MUX, 91 network connection part, 101 input part, 102 control part, 103 memory, 104 playback part, 105 display part, 106 speaker, 121 data acquisition part, 122 read buffer, 123 DeMU X, 124 caption generation unit, 125 video generation unit, 126 audio generation unit, 127 display data generation unit, 151 luminance compression unit, 201 control unit, 202 display unit, 203 speaker

Claims (17)

An information processing apparatus comprising: a file generation unit that generates a management file that is a file for managing an encoded stream of an HDR content by describing an HDR parameter including at least information related to brightness of HDR (High Dynamic Range) content. The information processing apparatus according to claim 1, wherein the file generation unit describes the HDR parameter in Representation or AdaptationSet of the management file. The information processing apparatus according to claim 1, wherein the information related to the luminance of the HDR content includes at least one of a table for converting light and an electrical signal, a maximum luminance included in the HDR content, and an average luminance of the HDR content. The information processing apparatus according to claim 3, wherein the information regarding the brightness of the HDR content includes an identifier when the table is the same but the application is different. The information processing apparatus according to claim 1, wherein the HDR parameter includes display characteristic information used when creating the HDR content. The characteristic information of the display includes at least one of coordinates of a color space that can be displayed by the display, coordinates of a white point on the color space of the display, maximum luminance of the display, and minimum luminance of the display. The information processing apparatus described. Information processing device
An information processing method for generating a management file, which is a file for managing an encoded stream of an HDR content, by describing an HDR parameter including at least information on brightness of HDR (High Dynamic Range) content. An acquisition unit that acquires an HDR parameter that includes at least information about brightness of HDR (High Dynamic Range) content, and acquires a management file that is a file for managing the encoded stream of the HDR content;
An information processing apparatus comprising: a selection unit that selects HDR content corresponding to the display unit using the HDR parameter of the management file acquired by the acquisition unit. The information processing apparatus according to claim 8, wherein the HDR parameter is described in Representation or AdaptationSet of the management file. The information processing apparatus according to claim 8, wherein the information regarding the brightness of the HDR content includes at least one of a table for converting light and an electrical signal, a maximum brightness included in the HDR content, and an average brightness of the HDR content. The information processing apparatus according to claim 10, wherein the information regarding the brightness of the HDR content includes an identifier when the table is the same but the application is different. The information processing apparatus according to claim 8, wherein the HDR parameter includes display characteristic information used when creating the HDR content. The characteristic information of the display includes at least one of coordinates of a color space that can be displayed by the display, coordinates of a white point on the color space of the display, maximum luminance of the display, and minimum luminance of the display. The information processing apparatus described. The information processing apparatus according to claim 8, further comprising a luminance compression unit that compresses the luminance of the HDR content when the luminance of the HDR content exceeds a display range of the display unit. The information processing apparatus according to claim 8, further comprising the display unit. The display unit is externally connected via a connection unit,
A performance information acquisition unit for acquiring performance information of the display unit;
A transmission unit that transmits an HDR parameter corresponding to the HDR content selected by the selection unit, and
The selection unit includes:
The information processing apparatus according to claim 8, wherein the HDR content corresponding to the display unit is selected using the performance information acquired by the performance information acquisition unit. Information processing device
An HDR parameter including at least information related to brightness of HDR (High Dynamic Range) content is described, and a management file that is a file for managing the encoded stream of the HDR content is acquired,
An information processing method for selecting an HDR content corresponding to a display unit using an HDR parameter of an acquired management file.

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