WO2016108268A1 - 送信装置、送信方法、受信装置および受信方法 - Google Patents
送信装置、送信方法、受信装置および受信方法 Download PDFInfo
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Definitions
- the present technology relates to a transmission device, a transmission method, a reception device, and a reception method, and more particularly, to a transmission device that transmits transmission video data obtained by applying high dynamic range photoelectric conversion to high dynamic range video data.
- Non-Patent Document 1 describes HDR photoelectric conversion characteristics (new gamma characteristics) including a compatible region with conventional photoelectric conversion characteristics (gamma characteristics) in consideration of reception by a conventional receiver.
- An object of the present technology is to make it possible to satisfactorily perform reception-side electro-optic conversion processing on transmission video data obtained using HDR photoelectric conversion characteristics.
- a photoelectric conversion unit that obtains transmission video data by performing high dynamic range photoelectric conversion on the high dynamic range video data
- An encoding unit that encodes the transmission video data to obtain a video stream
- a transmission unit for transmitting a container of a predetermined format including the video stream
- the transmission apparatus includes an information insertion unit that inserts meta information indicating an electro-optic conversion characteristic corresponding to the high dynamic range photoelectric conversion characteristic in the parameter set region of the video stream.
- high dynamic range photoelectric conversion is performed on the high dynamic range video data by the photoelectric conversion unit to obtain transmission video data.
- the encoding unit performs an encoding process on the transmission video data to obtain a video stream.
- a container having a predetermined format including the video stream is transmitted by the transmission unit.
- the meta information indicating the electro-optic conversion characteristic corresponding to the high dynamic range photoelectric conversion characteristic is inserted into the parameter set area of the video stream by the information insertion unit.
- the parameter set area may be an area of an SPS NAL unit.
- meta information indicating the electro-optic conversion characteristic corresponding to the high dynamic range photoelectric conversion characteristic is inserted into the parameter set area of the video stream. Therefore, it is possible to satisfactorily perform reception-side electro-optic conversion processing on transmission video data obtained using the HDR photoelectric conversion characteristics.
- the information insertion unit may further insert identification information indicating that the video stream corresponds to the high dynamic range into the container layer.
- identification information the receiving side can easily recognize that the video stream supports the high dynamic range, and meta information indicating the electro-optical conversion characteristics corresponding to the high dynamic range photoelectric conversion characteristics is extracted from the parameter set area of the video stream.
- meta information indicating the electro-optical conversion characteristics corresponding to the high dynamic range photoelectric conversion characteristics is extracted from the parameter set area of the video stream.
- information indicating whether the video stream has display compatibility with the normal dynamic range may be added to the identification information.
- information indicating whether or not display luminance adjustment of the video stream is prohibited may be added to the identification information.
- the container may be a transport stream, and the information insertion unit may insert the identification information under the program map table or the event information table.
- the container may be an MMT stream, and the information insertion unit may insert the identification information under the MMT package table.
- the information insertion unit may further insert meta information for display control in an area different from the parameter set area of the video stream.
- the meta information for display control may include peak luminance information.
- the meta information for display control may include area information indicating an area that allows display luminance adjustment. In this case, display control can be appropriately performed using meta information for display control.
- the meta information for display control may include information indicating whether or not display luminance adjustment of the video stream is prohibited. Thereby, the adjustment exceeding the intention of the production side with respect to the display luminance can be suppressed, or the viewer's eye fatigue can be suppressed.
- a decoding unit that performs decoding processing on the video stream to obtain the transmission video data;
- An electro-optic conversion unit that performs electro-optic conversion on the transmission video data obtained by the decoding unit to obtain display video data;
- the transmission video data is obtained by performing high dynamic range photoelectric conversion on high dynamic range data, Meta information indicating an electro-optic conversion characteristic corresponding to the characteristic of the high dynamic range photoelectric conversion is inserted in the parameter set region of the video stream,
- An information extraction unit for extracting the meta information from the video stream;
- the electro-optic conversion unit is in a receiving apparatus that uses electro-optic conversion characteristics indicated by the meta information extracted by the information extracting unit.
- a container having a predetermined format including a video stream obtained by encoding transmission video data is received by the receiving unit.
- the decoding unit performs decoding processing on the video stream to obtain transmission video data.
- the electro-optic conversion unit performs electro-optic conversion on the transmission video data to obtain display video data.
- Transmission video data is obtained by subjecting high dynamic range data to high dynamic range photoelectric conversion.
- Meta information indicating electro-optic conversion characteristics corresponding to the high dynamic range photoelectric conversion characteristics is inserted in the parameter set area of the video stream.
- Meta information is extracted from the video stream by the information extraction unit.
- electro-optic conversion unit electro-optic conversion is performed on the transmission video data using the electro-optic conversion characteristic indicated by the meta information.
- the parameter set area may be an area of an SPS NAL unit.
- the meta information indicating the electro-optic conversion characteristic corresponding to the high dynamic range photoelectric conversion characteristic is extracted from the parameter set area of the video stream, and the transmission video data is transmitted using the electro-optic conversion characteristic indicated by the meta information.
- the light-to-light conversion is performed. Therefore, it is possible to satisfactorily perform electro-optic conversion processing on transmission video data obtained using the high dynamic range photoelectric conversion characteristics.
- identification information indicating that the video stream corresponds to the high dynamic range is inserted in the container layer, and the information extraction unit performs parameter setting of the video stream based on the identification information.
- Meta information may be extracted from the area. In this case, the meta information is reliably extracted from the parameter set area of the video stream, and accordingly, appropriate optical conversion can be performed on the transmission video data.
- meta information for display control is included in an area different from the parameter set area of the video stream, and display luminance adjustment is performed on display video data based on the meta information for display control. It may be made to further be provided with the luminance adjustment part which performs.
- the meta information for display control includes area information indicating an area that allows display brightness adjustment, and the brightness adjustment unit performs display brightness adjustment in an area that allows display brightness adjustment. Also good. In this case, the display brightness can be adjusted appropriately.
- information indicating whether or not the display brightness adjustment of the video stream is prohibited is inserted in the container layer and / or the video stream layer, and the brightness adjustment unit displays the video stream.
- the display brightness adjustment may not be performed on the display video data. Thereby, the adjustment exceeding the intention of the production side with respect to the display luminance can be suppressed, or the viewer's eye fatigue can be suppressed.
- FIG. 1 shows a configuration example of a transmission / reception system 10 as an embodiment.
- the transmission / reception system 10 includes a transmission device 100 and a reception device 200.
- the transmission apparatus 100 generates an MPEG2 transport stream TS as a container, and transmits the transport stream TS on a broadcast wave or a net packet.
- the transport stream TS includes a video stream obtained by encoding transmission video data obtained by performing HDR photoelectric conversion on HDR video data.
- Meta information indicating the electro-optic conversion characteristics corresponding to the HDR photoelectric conversion characteristics is inserted into the parameter set area of the video stream. Also, identification information indicating that the video stream supports HDR is inserted in the container layer. This identification information includes information indicating whether the video stream has display compatibility with the normal dynamic range, information indicating whether display luminance adjustment of the video stream is prohibited, or the like.
- the normal dynamic range is appropriately expressed as “LDR”.
- information for display control is inserted into an area different from the parameter set area of the video stream.
- the meta information for display control includes peak luminance information, region information indicating a region where display luminance adjustment is permitted, information indicating whether display luminance adjustment of a video stream is prohibited, or the like.
- the receiving apparatus 200 obtains transmission video data by performing a decoding process on the video stream included in the receiving container.
- the receiving apparatus 200 obtains display video data by performing photoelectric conversion on the transmission video data based on the transmission conversion characteristics indicated by the meta information inserted in the parameter set area of the video stream.
- the receiving apparatus 200 receives the meta information inserted in the parameter set area of the video stream based on the identification information indicating that the video stream inserted in the container layer corresponds to the high dynamic range. Extract.
- the receiving apparatus 200 performs display mapping processing, that is, display brightness adjustment, on the display video data based on the display control information inserted in the parameter set area of the video stream.
- display mapping processing that is, display brightness adjustment
- the display brightness adjustment is not performed.
- FIG. 2 shows a configuration example of the transmission device 100.
- the transmission apparatus 100 includes a control unit 101, an HDR camera 102, an HDR photoelectric conversion unit 103, a video encoder 104, a system encoder 105, and a transmission unit 106.
- the control unit 101 includes a CPU (Central Processing Unit), and controls the operation of each unit of the transmission device 100 based on a control program.
- CPU Central Processing Unit
- the HDR camera 102 images a subject and outputs HDR (High Dynamic Range) video data.
- This HDR video data has a contrast ratio of 0 to 100% * N (N is a number greater than 1) exceeding the brightness of the white peak of the conventional SDR image, for example, 0 to 1000%.
- the level of 100% corresponds to, for example, a white luminance value of 100 cd / m 2 .
- the master monitor 103a is a monitor for grading HDR video data obtained by the HDR camera 102.
- the master monitor 103a has a display luminance level corresponding to the HDR video data or suitable for grading the HDR video data.
- the HDR photoelectric conversion unit 103 applies the HDR photoelectric conversion characteristics to the HDR video data obtained by the HDR camera 102 to obtain transmission video data V1.
- a solid line “a” and a broken line “b” in FIG. 3 are examples of an HDR-OETF curve indicating the HDR photoelectric conversion characteristics.
- the broken line c in FIG. 3 is an SDR OETF curve indicating SDR photoelectric conversion characteristics.
- the horizontal axis indicates the input luminance level
- the vertical axis indicates the transmission code value.
- the HDR photoelectric conversion characteristic may include a compatible region with the SDR photoelectric conversion characteristic, like the HDR photoelectric conversion characteristic indicated by the solid line a and the broken line b in FIG. 3 described above. In other words, the curves of both characteristics match until the input luminance level reaches the compatibility limit value of both characteristics.
- the transmission code value becomes the compatibility level SP.
- the transmission code value is the peak level MP.
- the HDR display reference threshold value CL indicates a boundary between a region to be matched as luminance displayed on the receiver monitor (CE monitor) and a region dependent on the CE monitor.
- the transmission code value is the threshold level CP.
- the SDR photoelectric conversion characteristic when the input luminance level is the SDR characteristic expression limit luminance SL, the transmission code value becomes the peak level MP.
- SL is 100 cd / m 2 .
- the HDR display reference threshold value CL can be made to coincide with the compatibility limit value, and in this case, the threshold level CP can be substituted with the compatibility level SP.
- the video encoder 104 performs encoding such as MPEG4-AVC or HEVC on the transmission video data V1 to obtain encoded video data. Further, the video encoder 104 generates a video stream (video elementary stream) including the encoded video data by a stream formatter (not shown) provided in the subsequent stage.
- a video stream video elementary stream
- a stream formatter not shown
- the video encoder 104 inserts meta information indicating the HDR electro-optical conversion characteristic corresponding to the HDR photoelectric conversion characteristic into the parameter set area of the video stream.
- the video encoder 104 inserts the meta information “Transfer characteristics” in the VUI (video usability information) area of the SPS / NAL unit of the access unit (AU).
- Transfer characteristics designates HDR electro-optical conversion characteristics. That is, the “Transfer characteristics” indicates the type “New Type” of the HDR electro-optical conversion characteristics.
- the reference level “reference level” and the threshold level “threshold level” can be designated directly or indirectly.
- the reference level “reference level” is, for example, 100% corresponding to a white luminance value of 100 cd / m 2 .
- the threshold level “threshold level” indicates a boundary between an area to be matched as luminance displayed on the monitor (CE monitor) on the receiver side and an area that depends on the CE monitor.
- references level Lr (Lx>Lr> Lc)
- the video encoder 104 inserts meta information for display control in an area different from the parameter set area of the video stream.
- the video encoder 104 inserts a newly defined dynamic range / SEI message (Dynamic Range SEI message) in the “SEIs” portion of the access unit (AU).
- FIG. 5 shows the top access unit of GOP (Group Of Pictures) when the encoding method is HEVC.
- FIG. 6 shows access units other than the head of the GOP when the encoding method is HEVC.
- a decoding SEI message group “Prefix_SEIs” is arranged before a slice (slices) in which pixel data is encoded, and a display SEI message group “ “Suffix_SEIs” is arranged.
- the dynamic range / SEI message may be arranged as an SEI message group “Suffix_SEIs”.
- FIG. 7 shows a structural example (Syntax) of the dynamic range / SEI message.
- FIG. 8 shows the contents (Semantics) of main information in the structural example.
- the 8-bit field of “transfer_characteristics” designates the HDR electro-optical conversion characteristics. That is, this field indicates the type “New Type” of the HDR electro-optic conversion characteristic.
- An 8-bit field of “number_of_bits” indicates the number of encoded pixel bits.
- a 16-bit field of “minimum_brightness_value” indicates a minimum level of luminance (cd / m 2 ).
- a 16-bit field of “peak_level” indicates a relative value (%) of the maximum level.
- a 16-bit field of “peak_level_brightness” indicates the maximum level of luminance (cd / m 2 ), and corresponds to the peak luminance PL in FIG.
- a 16-bit field of “compliant_threshold_level” indicates a threshold value (%) for display level mapping.
- a 16-bit field of “compliant_threshold_level_value” indicates luminance (cd / m 2 ) serving as a threshold for display level mapping, and corresponds to the HDR display reference threshold CL in FIG.
- the threshold information of “Compliant_threshold_level” and “Compliant_threshold_level_value” can also be sent as 100% indicating the reference luminance and the reference luminance.
- the flag “mapping_protection_flag” indicates whether display mapping (display luminance adjustment) after decoding is prohibited. “1” indicates that display mapping is prohibited. “0” indicates that display mapping is not prohibited.
- the system encoder 105 generates a transport stream TS including the video stream VS generated by the video encoder 104. Then, the transmission unit 106 transmits this transport stream TS to the reception device 200 by placing it on a broadcast wave or a network packet.
- the system encoder 105 inserts identification information indicating that the video stream corresponds to the high dynamic range into the layer of the transport stream (container).
- the system encoder 105 has a high dynamic range descriptor (High) under a program map table (PMT: Program Map Table) or an event information table (EIT: Event Information Table). Insert Dynamic (Range) descriptor).
- FIG. 9 shows a structural example (Syntax) of a high dynamic range descriptor.
- FIG. 10 shows the contents (Semantics) of main information in the structural example.
- An 8-bit field of “descriptor_tag” indicates a descriptor type, and here indicates a high dynamic range descriptor.
- the 8-bit field of “descriptor_length” indicates the length (size) of the descriptor, and indicates the number of subsequent bytes as the descriptor length.
- the “HDR_flag” flag indicates whether the service stream (video stream) is compatible with HDR. “1” indicates whether the video stream is HDR-compatible and the VUI has HDR characteristics, or whether the VUI is conventional and the SEI indicates HDR information, or whether the VUI has HDR characteristics and the SEI also has HDR information. Indicates either. “0” indicates that the video stream does not support HDR.
- the “SDR_compatible_flag” flag indicates whether or not display compatibility with the SDR is available when the service stream (video stream) is compatible with HDR. “1” indicates that there is display compatibility with the SDR. “0” indicates that there is no display compatibility with the SDR.
- the flag “mapping_protection flag” indicates whether the service stream (video stream) prohibits display mapping (display luminance adjustment). “1” indicates that display mapping is prohibited. “0” indicates that display mapping is not prohibited.
- HDR video data obtained by imaging with the HDR camera 102 is supplied to the HDR photoelectric conversion unit 103.
- the HDR video data obtained by the HDR camera 102 is graded using the master monitor 103a.
- the HDR photoelectric conversion unit 103 the HDR photoelectric conversion characteristic (HDR OETF curve) is applied to the HDR video data to perform photoelectric conversion, and transmission video data V1 is obtained.
- the transmission video data V1 is supplied to the video encoder 104.
- the transmission video data V1 is encoded by, for example, MPEG4-AVC or HEVC to obtain encoded video data.
- a video stream including the encoded video data is generated by a stream formatter provided in the subsequent stage.
- meta information indicating the HDR electro-optical conversion characteristic corresponding to the HDR photoelectric conversion characteristic is inserted into the layer of the video stream. That is, in the video encoder 104, meta information “Transfer characteristics” is inserted into the VUI (video usability information) area of the SPS NAL unit of the access unit (AU).
- meta information for display control is inserted into the layer of the video stream. That is, in the video encoder 104, a newly defined high dynamic range / SEI message is inserted in the “SEIs” portion of the access unit (AU).
- the video stream VS generated by the video encoder 104 is supplied to the system encoder 105.
- This system encoder 105 generates an MPEG2 transport stream TS including a video stream.
- the transport stream TS is transmitted to the receiving apparatus 200 by the transmitting unit 106 on a broadcast wave or a net packet.
- the system encoder 105 inserts identification information indicating that the video stream corresponds to the high dynamic range into the layer of the transport stream (container). That is, in the system encoder 105, a high dynamic range descriptor (High Dynamic Range descriptor) is subordinate to a program map table (PMT: Program Map Table) or an event information table (EIT: Event Information Table). Is inserted.
- PMT Program Map Table
- EIT Event Information Table
- FIG. 11 illustrates a configuration example of the transport stream TS.
- Meta information “Transfer characteristics” designating HDR electro-optic conversion characteristics is inserted into the SPS VUI area of the access unit.
- a dynamic range / SEI message in which a peak level “Peak level”, a threshold level “threshold level”, a mapping protection flag “mapping_protection_flag”, and the like are described is inserted in the access unit.
- the transport stream TS includes a PMT (Program Map Table) as PSI (Program Specific Information).
- PSI is information describing to which program each elementary stream included in the transport stream belongs.
- the PMT has a program loop (Program ⁇ ⁇ ⁇ loop) that describes information related to the entire program.
- the PMT there is an elementary stream loop having information related to each elementary stream.
- a video elementary stream loop (video ES loop) corresponding to the video stream.
- information such as a stream type and PID (packet identifier) is arranged corresponding to the video stream, and a descriptor describing information related to the video stream is also provided. Be placed.
- the value of “Stream_type” of this video stream is set to, for example, a value indicating the HEVC video stream, and the PID information indicates PID1 assigned to the PES packet “video PES” of the video stream.
- a high dynamic range descriptor in which an HDR flag “HDR_flag”, an SDR compatible flag “SDR_compatible_flag”, a mapping protection flag “mapping_protection_flag”, and the like are described is inserted.
- the transport stream TS includes an EIT (Event Information Table) as SI (Service Information) for managing events (programs). It is also conceivable to insert a high dynamic range descriptor under this EIT.
- EIT Event Information Table
- SI Service Information
- FIG. 12 shows a configuration example of the receiving device 200.
- the receiving apparatus 200 includes a control unit 201, a receiving unit 202, a system decoder 203, a video decoder 204, an HDR electro-optic conversion unit 205, an HDR display mapping unit 206, and a CE monitor 207.
- the control unit 201 includes a CPU (Central Processing Unit), and controls the operation of each unit of the reception device 200 based on a control program.
- CPU Central Processing Unit
- the receiving unit 202 receives the transport stream TS transmitted from the transmitting device 100 on broadcast waves or net packets.
- the system decoder 203 extracts a video stream (elementary stream) VS from the transport stream TS. Further, the system decoder 203 extracts various information inserted in the container (transport stream) layer and sends it to the control unit 201.
- this extracted information includes information on the high dynamic range descriptor (see FIG. 9). Since the “HDR flag” of the high dynamic range descriptor is “1”, the control unit 201 recognizes that the video stream corresponds to HDR, and also performs SEI (dynamic range / SEI) during HDR display. Recognize that you should refer to
- the video decoder 204 performs a decoding process on the video stream VS extracted by the system decoder 203 and outputs transmission video data V1. In addition, the video decoder 204 extracts a parameter set or SEI message inserted in each access unit constituting the video stream VS and sends it to the control unit 201.
- control unit 201 recognizes that the video stream corresponds to HDR, and recognizes that the SEI should be referred to during HDR display.
- the meta information “Transfer characteristic” and the dynamic range / SEI message (see FIG. 7) for specifying the HDR electro-optical conversion characteristic inserted in the VUI area are also reliably extracted.
- the control unit 201 sets the HDR electro-optical conversion characteristic corresponding to the HDR electro-optical conversion characteristic specified by the meta information “Transfer characteristics”, that is, the HDR photoelectric conversion characteristic used on the transmission side, in the HDR electro-optical conversion unit 205.
- the HDR electro-optic conversion unit 205 applies the set HDR electro-optic conversion characteristics to the transmission video data V1 output from the video decoder 204 to obtain display video data for displaying an HDR image.
- the solid line a in FIG. 13 is an HDR EOTF curve (Type A) showing the HDR electro-optic conversion characteristics.
- This HDR EOTF curve (Type A) corresponds to the HDR OETF curve shown by the solid line a in FIG.
- a broken line b in FIG. 13 is an HDRTEOTF curve (Type B) showing another HDR electro-optic conversion characteristic.
- the HDR EOTF curve (Type B) corresponds to the HDR OETF curve shown by the broken line b in FIG.
- a broken line c in FIG. 13 indicates an SDR / EOTF curve (Type / C) corresponding to the SDR / OETF curve shown in the broken line c in FIG.
- the display luminance level is PL.
- the transmission code value is the threshold level CP
- the output luminance level is the HDR display reference threshold CL.
- FIG. 13 in the case of the HDR-EOTF curve (Type A), the threshold level CP and the HDR display reference threshold CL are shown. If mapping protection is not performed, the two-dot chain line a 'up to the display luminance level EP on the display side.
- the compatibility level SP and the reference level defined for it are detected, and if the mapping is not protected, the display brightness level is displayed on the display side.
- Luminance mapping as indicated by the alternate long and short dash line b ′ is performed up to EP.
- the threshold value CL indicates the boundary between the region to be matched as the luminance displayed on the receiver monitor (CE monitor) and the region dependent on the CE monitor.
- the dynamic range / SEI message inserted in the layer of the video stream includes PL and CL luminance information as meta information for display control (see FIG. 7).
- the HDR display mapping unit 206 performs display luminance adjustment on the display video data obtained by the HDR electro-optic conversion unit 205 based on meta information for display control. That is, when the maximum luminance display capability of the CE monitor 207 is EP higher than PL, the HDR display mapping unit 206 sets the level exceeding the luminance CL among the output luminance levels of the HDR light-to-light conversion unit 205 as the display maximum luminance level. It is also possible to perform display mapping processing, that is, display luminance adjustment processing so as to be EP, as one method of the display function.
- An alternate long and two short dashes line a ′ in FIG. 13 shows an example of the display brightness adjustment process in that case.
- the HDR display mapping unit 206 when “mapping_protection_flag” of the high dynamic range descriptor or dynamic range / SEI message is “1”, indicating that display mapping is prohibited, Based on the control, display brightness adjustment processing is not performed. Thereby, the adjustment exceeding the intention of the production side with respect to the display luminance is suppressed, or the eye fatigue of the viewer is suppressed.
- the reception unit 202 receives the transport stream TS transmitted from the transmission device 100 on broadcast waves or net packets.
- This transport stream TS is supplied to the system decoder 203.
- the video stream VS is extracted from the transport stream TS.
- various information inserted in the container layer is extracted and sent to the control unit 201.
- This extracted information includes information on the high dynamic range descriptor (see FIG. 9).
- the control unit 201 recognizes that the video stream corresponds to HDR based on “HDR flag” of the high dynamic range descriptor being “1”, and should refer to SEI at the time of HDR display. It is recognized.
- the video stream VS extracted by the system decoder 203 is supplied to the video decoder 204.
- the video stream VS extracted by the system decoder 203 is subjected to decoding processing to obtain transmission video data V1.
- the video decoder 204 extracts the parameter set and SEI message inserted in each access unit constituting the video stream VS and sends it to the control unit 201.
- the control unit 201 recognizes that the video stream is compatible with HDR, and recognizes that SEI should be referred to during HDR display, so that the VPS area of the SPS NAL unit can be referred to.
- the meta information “Transfer characteristics” and the dynamic range / SEI message (see FIG. 7) for specifying the inserted HDR electro-optical conversion characteristics are also extracted.
- the HDR electro-optical conversion characteristic corresponding to the HDR electro-optical conversion characteristic specified by the meta information “Transfer characteristic”, that is, the HDR photoelectric conversion characteristic used on the transmission side, is set in the HDR electro-optical conversion unit 205.
- the set HDR light / light conversion characteristics are applied to the transmission video data V1 output from the video decoder 204, and display video data for displaying an HDR image is obtained.
- the display video data obtained by the HDR electro-optic conversion unit 205 is supplied to the HDR display mapping unit 206.
- the HDR display mapping unit 206 performs display brightness adjustment on the display video data based on meta information for display control. That is, in the HDR display mapping unit 206, when the maximum luminance display capability of the CE monitor 207 is EP higher than PL, the level exceeding the luminance CL among the output luminance levels of the HDR electro-optic conversion unit 205 is the display maximum luminance level. Is subjected to display mapping processing, that is, luminance conversion processing (see the two-dot chain line a ′ in FIG. 13). Alternatively, display mapping processing, that is, luminance conversion processing is performed for a level exceeding the reference luminance level so that the maximum display luminance level is EP (see the dashed line b ′ in FIG. 13).
- the HDR display mapping unit 206 performs display luminance adjustment processing when “mapping_protection_flag” of the high dynamic range descriptor or the dynamic range / SEI message is “1”, indicating that display mapping is prohibited.
- the display video data obtained by the HDR electro-optic conversion unit 205 is output as it is without being performed.
- the output video data of the display mapping unit 206 is supplied to the CE monitor 207.
- An HDR image is displayed on the CE monitor 207.
- meta information “Transfer characteristics” specifying the electro-optic conversion characteristics corresponding to the high dynamic range photoelectric conversion characteristics is inserted into the VUI area of the SPS NAL unit of the video stream. Is. Therefore, it is possible to satisfactorily perform the electro-optic conversion processing on the reception side for the transmission video data obtained using the HDR photoelectric conversion characteristics by using the HDR electro-optic conversion characteristics specified by the meta information “Transfer characteristic”. .
- a high dynamic range descriptor (High Dynamic Range Descriptor) is inserted into a container (transport stream) layer.
- This descriptor includes “HDR_flag” indicating whether the service stream (video stream) is compatible with HDR. Therefore, the receiving side can easily recognize that the video stream corresponds to the high dynamic range, and meta information “Transfer characteristics” indicating the electro-optical conversion characteristic corresponding to the high dynamic range photoelectric conversion characteristic from the parameter set area of the video stream. Can be extracted with certainty, and appropriate electro-optic conversion can be performed on the transmission video data.
- a dynamic range / SEI message is inserted into the layer of the video stream.
- This SEI message includes meta information for display control. Therefore, display luminance control can be appropriately performed on the receiving side using the meta information for display control.
- the meta information for display control includes area information indicating an area for which display luminance adjustment is allowed. For example, luminance conversion corresponding to the display luminance capability of the CE monitor 207 is performed only in an area where luminance conversion is allowed. As a result, the luminance atmosphere intended by the production side can be reproduced well.
- the “mapping_protection flag” indicating whether the service stream (video stream) prohibits display mapping (display brightness adjustment) in the high dynamic range descriptor or dynamic range SEI message. A flag is included. Therefore, the adjustment exceeding the intention on the production side with respect to the display luminance can be suppressed, or the eyestrain of the viewer can be suppressed.
- the HDR light-to-light conversion unit 205 performs light-to-light conversion processing
- the HDR display mapping unit 206 performs luminance conversion processing according to the maximum luminance display capability of the CE monitor 207. Indicated.
- the electro-optical conversion process and the luminance conversion process can be performed simultaneously only by the HDR electro-optical conversion unit 205.
- the transmission / reception system 10 including the transmission device 100 and the reception device 200 has been described.
- the configuration of the transmission / reception system to which the present technology can be applied is not limited thereto.
- the receiving device 200 includes, for example, a set top box (STB) 200A and a monitor 200B connected by a digital interface such as (High-Definition Multimedia Interface).
- STB set top box
- monitor 200B connected by a digital interface such as (High-Definition Multimedia Interface).
- HDMI High-Definition Multimedia Interface
- the set-top box 200A up to the video decoder 204 is included in the set-top box 200A, and the electro-optic conversion unit 205 and the subsequent are included in the monitor 200B.
- the set-top box 200A sends meta information indicating HDR photoelectric conversion characteristics, meta information for display control, and the like to the monitor 200B using a packet of “Vender Specific InfoFrame”.
- FIG. 15 shows an example of the structure after the seventh byte of the “Vender Specific InfoFrame” packet sent from the set top box 200A to the monitor 200B.
- FIG. 16 shows the contents of main information in each structural example.
- 3 bits information of “Display_control_type” is arranged from the 7th bit to the 5th bit of the 7th byte. This 3-bit information indicates the type of display type. “001” indicates SD display control, and “010” indicates HDR display control. Here, it is “010”.
- the flag “mapping_protection_flag” is arranged in the fourth bit of the seventh byte. This flag indicates whether or not display mapping (display brightness adjustment) after decoding is prohibited. “1” indicates that display mapping is prohibited. “0” indicates that display mapping is not prohibited. 4-bit information of “Display_control_metadata_length” is arranged from the 3rd bit to the 0th bit of the 7th byte. This 4-bit information indicates the size of “Display_control_metadata” to be subsequently arranged in bytes. Here, “12” is set.
- the 8-bit information of “Transfer characteristics” is arranged in the 8th byte.
- This 8-bit information specifies the HDR electro-optic conversion characteristics. With this information, the electro-optic conversion characteristics for display are detected. Here, “0x10” is set.
- 8-bit information of “Number ⁇ ⁇ of bits” is arranged in the 8th + 1 byte. This 8-bit information indicates the number of encoded pixel bits.
- 16th bit information of “Minimum brightness value” is arranged from the 8 + 2 byte to the 8 + 3 byte. This 16-bit information indicates the minimum level of luminance (cd / m 2 ). 16th bit information of “Peak Level” is arranged from the 8th + 4th byte to the 8th + 5th byte. This 16-bit information indicates the relative value (%) of the maximum level.
- 16th bit information of “Peak Level Brightness” is arranged from the 8th + 6th byte to the 8th + 7th byte. This 16-bit information indicates the maximum level of luminance (cd / m 2 ).
- 16th bit information of “Compliant_threshold_level” is arranged from the 8th + 8th byte to the 8th + 9th byte. This 16-bit information indicates a threshold value (%) for display level mapping.
- 16th bit information of “Compliant_threshold_level_value” is arranged from the 8th + 10th byte to the 8th + 11th byte. This 16-bit information indicates the luminance (cd / m 2 ) that serves as a threshold for display level mapping.
- the threshold information of “Compliant_threshold_level” and “Compliant_threshold_level_value” can also be sent as 100% indicating the reference luminance and the reference luminance. Further, the information transmission described above sent from the set top box 200A to the monitor 200B is not limited to the “Vender Specific InfoFrame” packet, and the same transmission can be performed by defining another InfoFrame packet. Of course.
- the container is a transport stream (MPEG-2 TS)
- MPEG-2 TS transport stream
- the transport is not limited to the TS, and the video layer can be realized by the same method even in the case of other packets such as ISOBMFF and MMT.
- FIG. 17 shows the MMT structure.
- MMT packets of assets such as video and audio.
- MMT packet of a video asset identified by ID1.
- Meta information “Transfer characteristic” specifying HDR electro-optic conversion characteristics is inserted into the SPS VUI area of the access unit.
- a dynamic range / SEI message in which a peak level “Peak level”, a threshold level “threshold level”, a mapping protection flag “mapping_protection_flag”, and the like are described is inserted into the access unit.
- message packets such as PA (Packet Access) message packets exist in the MMT stream.
- the PA message packet includes a table such as an MP table (MMT Package Table).
- the MP table includes information for each asset.
- a high dynamic range descriptor in which an HDR flag “HDR_flag”, an SDR compatible flag “SDR_compatible_flag”, a mapping protection flag “mapping_protection_flag”, and the like are described is inserted in association with the video asset.
- this technique can also take the following structures.
- a photoelectric conversion unit that performs high dynamic range photoelectric conversion on high dynamic range video data to obtain transmission video data;
- An encoding unit that encodes the transmission video data to obtain a video stream;
- a transmission unit for transmitting a container of a predetermined format including the video stream;
- a transmission apparatus comprising: an information insertion unit that inserts meta information indicating an electro-optic conversion characteristic corresponding to the high dynamic range photoelectric conversion characteristic in the parameter set region of the video stream.
- the parameter set area is an area of an SPS NAL unit.
- the transmission device according to (1) or (2), wherein the information insertion unit further inserts identification information indicating that the video stream corresponds to a high dynamic range into the layer of the container.
- the transmission device according to (3), wherein information indicating whether or not the video stream has display compatibility with a normal dynamic range is added to the identification information.
- the transmission device according to (3) or (4), wherein information indicating whether or not display luminance adjustment of the video stream is prohibited is added to the identification information.
- the container is a transport stream, The transmission device according to any one of (3) to (5), wherein the information insertion unit inserts the identification information under a program map table or an event information table.
- the container is an MMT stream
- the transmission device according to any one of (3) to (5), wherein the information insertion unit inserts the identification information under a MMT package table.
- the transmission device according to any one of (1) to (7), wherein the information insertion unit further inserts meta information for display control in an area different from the parameter set area of the video stream. .
- the transmission apparatus according to (8), wherein the meta information for display control includes peak luminance information.
- the meta information for display control includes area information indicating an area allowing display luminance adjustment.
- the meta information for display control includes information indicating whether or not display luminance adjustment of the video stream is prohibited.
- the transmission device according to any one of (8) to (11), wherein the different region is a region of an SEI NAL unit.
- (13) a photoelectric conversion step of performing high dynamic range photoelectric conversion on the high dynamic range video data to obtain transmission video data; An encoding step of encoding the transmission video data to obtain a video stream; A transmission step of transmitting a container of a predetermined format including the video stream by the transmission unit; An information insertion step of inserting meta information indicating electro-optic conversion characteristics corresponding to the high dynamic range photoelectric conversion characteristics into the parameter set region of the video stream.
- a receiving unit that receives a container of a predetermined format including a video stream obtained by encoding transmission video data;
- a decoding unit that performs decoding processing on the video stream to obtain the transmission video data;
- An electro-optic conversion unit that performs electro-optic conversion on the transmission video data obtained by the decoding unit to obtain display video data;
- the transmission video data is obtained by performing high dynamic range photoelectric conversion on high dynamic range data, Meta information indicating an electro-optic conversion characteristic corresponding to the characteristic of the high dynamic range photoelectric conversion is inserted in the parameter set region of the video stream,
- An information extraction unit for extracting the meta information from the video stream;
- the lightning conversion unit is a receiving device that uses lightning conversion characteristics indicated by the meta information extracted by the information extraction unit.
- the reception apparatus according to (14), wherein the parameter set area is an area of an SPS NAL unit.
- Identification information indicating that the video stream corresponds to a high dynamic range is inserted in the container layer, The receiving device according to (14) or (15), wherein the information extraction unit extracts the meta information from a parameter set region of the video stream based on the identification information.
- Meta information for display control is included in an area different from the parameter set area of the video stream, The receiving device according to any one of (14) to (16), further including: a luminance adjusting unit that adjusts display luminance of the display video data based on the meta information for display control.
- the meta information for display control includes area information indicating an area allowing display luminance adjustment, The receiving device according to (17), wherein the luminance adjustment unit performs the display luminance adjustment in an area where the display luminance adjustment is allowed.
- Information indicating whether display luminance adjustment of the video stream is prohibited is inserted into the container layer and / or the video stream layer, The brightness adjustment unit does not perform display brightness adjustment on the display video data when the information indicating whether display brightness adjustment of the video stream is prohibited is prohibited.
- the transmission video data is obtained by performing high dynamic range photoelectric conversion on high dynamic range data, Meta information indicating an electro-optic conversion characteristic corresponding to the characteristic of the high dynamic range photoelectric conversion is inserted in the parameter set region of the video stream, A receiving method using the electro-optic conversion characteristic indicated by the meta information in the electro-optic conversion step.
- the main feature of this technology was obtained using the high dynamic range photoelectric conversion characteristics by inserting meta information specifying the light conversion characteristics corresponding to the high dynamic range photoelectric conversion characteristics into the SPS NAL unit of the video stream. This is to make it possible to satisfactorily perform the electro-optic conversion processing on the receiving side for the transmission video data (see FIG. 11).
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Abstract
Description
ハイダイナミックレンジビデオデータにハイダイナミックレンジ光電変換を行って伝送ビデオデータを得る光電変換部と、
上記伝送ビデオデータにエンコード処理を施してビデオストリームを得るエンコード部と、
上記ビデオストリームを含む所定フォーマットのコンテナを送信する送信部と、
上記ビデオストリームのパラメータセット領域に上記ハイダイナミックレンジ光電変換特性に対応した電光変換特性を示すメタ情報を挿入する情報挿入部を備える
送信装置にある。
伝送ビデオデータが符号化されて得られたビデオストリームを含む所定フォーマットのコンテナを受信する受信部と、
上記ビデオストリームにデコード処理を施して上記伝送ビデオデータを得るデコード部と、
上記デコード部で得られた上記伝送ビデオデータに電光変換を行って表示用ビデオデータを得る電光変換部を備え、
上記伝送ビデオデータは、ハイダイナミックレンジデータにハイダイナミックレンジ光電変換が施されて得られたものであり、
上記ビデオストリームのパラメータセット領域に上記ハイダイナミックレンジ光電変換の特性に対応した電光変換特性を示すメタ情報が挿入されており、
上記ビデオストリームから上記メタ情報を抽出する情報抽出部をさらに備え、
上記電光変換部は、上記情報抽出部で抽出された上記メタ情報が示す電光変換特性を用いる
受信装置にある。
1.実施の形態
2.変形例
[送受信システムの構成例]
図1は、実施の形態としての送受信システム10の構成例を示している。この送受信システム10は、送信装置100および受信装置200により構成されている。
図2は、送信装置100の構成例を示している。この送信装置100は、制御部101と、HDRカメラ102と、HDR光電変換部103と、ビデオエンコーダ104と、システムエンコーダ105と、送信部106を有している。制御部101は、CPU(Central Processing Unit)を備えて構成され、制御プログラムに基づいて、送信装置100の各部の動作を制御する。
Reference level = Lr ( Lx > Lr > Lc )
Threshold level = Lt ( Ly > Lt > Lr )
が規定されていることを示す。なお、必ずしも「reference level」と「threshold level」とが別に規定されることはなく、「Reference level」=「Threshold level」で、どちらか一つのレベルが規定されることも可能である。
図11は、トランスポートストリームTSの構成例を示している。この構成例では、PID1で識別されるビデオストリームのPESパケット「video PES1」が存在する。アクセスユニットのSPSのVUIの領域に、HDR電光変換特性を指定するメタ情報「Transfer characteristics」が挿入される。また、アクセスユニットに、ピークレベル「Peak level」、閾値レベル「threshold level」、マッピング・プロテクション・フラグ「mapping_protection_flag」などが記述されたダイナミックレンジ・SEIメッセージが挿入される。
図12は、受信装置200の構成例を示している。この受信装置200は、制御部201と、受信部202と、システムデコーダ203と、ビデオデコーダ204と、HDR電光変換部205と、HDR表示マッピング部206と、CEモニタ207を有している。制御部201は、CPU(Central Processing Unit)を備えて構成され、制御プログラムに基づいて、受信装置200の各部の動作を制御する。
なお、上述実施の形態において、受信装置200では、HDR電光変換部205で電光変換処理を行うと共に、HDR表示マッピング部206でCEモニタ207の最大輝度表示能力に応じた輝度変換処理を行う例を示した。しかし、電光変換特性(EOTF)に輝度変換特性を反映させておくことで、HDR電光変換部205のみで電光変換処理と輝度変換処理とを同時に行わせることが可能である。
(1)ハイダイナミックレンジビデオデータにハイダイナミックレンジ光電変換を行って伝送ビデオデータを得る光電変換部と、
上記伝送ビデオデータにエンコード処理を施してビデオストリームを得るエンコード部と、
上記ビデオストリームを含む所定フォーマットのコンテナを送信する送信部と、
上記ビデオストリームのパラメータセット領域に上記ハイダイナミックレンジ光電変換特性に対応した電光変換特性を示すメタ情報を挿入する情報挿入部を備える
送信装置。
(2)上記パラメータセット領域は、SPS NALユニットの領域である
前記(1)に記載の送信装置。
(3)上記情報挿入部は、上記コンテナのレイヤに、上記ビデオストリームがハイダイナミックレンジに対応していることを示す識別情報をさらに挿入する
前記(1)または(2)に記載の送信装置。
(4)上記識別情報には、上記ビデオストリームが通常ダイナミックレンジとの表示互換性があるか否を示す情報が付加される
前記(3)に記載の送信装置。
(5)上記識別情報には、上記ビデオストリームの表示輝度調整が禁止されるか否かを示す情報が付加される
前記(3)または(4)に記載の送信装置。
(6)上記コンテナは、トランスポートストリームであり、
上記情報挿入部は、上記識別情報を、プログラム・マップ・テーブル、あるいはイベント・インフォメーション・テーブルの配下に挿入する
前記(3)から(5)のいずれかに記載の送信装置。
(7)上記コンテナは、MMTストリームであり、
上記情報挿入部は、上記識別情報を、MMT・パッケージ・テーブルの配下に挿入する
前記(3)から(5)のいずれかに記載の送信装置。
(8)上記情報挿入部は、上記ビデオストリームの上記パラメータセット領域とは異なる領域に、表示制御のためのメタ情報をさらに挿入する
前記(1)から(7)のいずれかに記載の送信装置。
(9)上記表示制御のためのメタ情報は、ピーク輝度情報を含む
前記(8)に記載の送信装置。
(10)上記表示制御のためのメタ情報は、表示輝度調整を許容する領域を示す領域情報を含む
前記(8)または(9)に記載の送信装置。
(11)上記表示制御のためのメタ情報は、上記ビデオストリームの表示輝度調整が禁止されるか否かを示す情報を含む
前記(8)から(10)のいずれかに記載の送信装置。
(12)上記異なる領域は、SEI NALユニットの領域である
前記(8)から(11)のいずれかに記載の送信装置。
(13)ハイダイナミックレンジビデオデータにハイダイナミックレンジ光電変換を行って伝送ビデオデータを得る光電変換ステップと、
上記伝送ビデオデータにエンコード処理を施してビデオストリームを得るエンコードステップと、
送信部により、上記ビデオストリームを含む所定フォーマットのコンテナを送信する送信ステップと、
上記ビデオストリームのパラメータセット領域に上記ハイダイナミックレンジ光電変換特性に対応した電光変換特性を示すメタ情報を挿入する情報挿入ステップを有する
送信方法。
(14)伝送ビデオデータが符号化されて得られたビデオストリームを含む所定フォーマットのコンテナを受信する受信部と、
上記ビデオストリームにデコード処理を施して上記伝送ビデオデータを得るデコード部と、
上記デコード部で得られた上記伝送ビデオデータに電光変換を行って表示用ビデオデータを得る電光変換部を備え、
上記伝送ビデオデータは、ハイダイナミックレンジデータにハイダイナミックレンジ光電変換が施されて得られたものであり、
上記ビデオストリームのパラメータセット領域に上記ハイダイナミックレンジ光電変換の特性に対応した電光変換特性を示すメタ情報が挿入されており、
上記ビデオストリームから上記メタ情報を抽出する情報抽出部をさらに備え、
上記電光変換部は、上記情報抽出部で抽出された上記メタ情報が示す電光変換特性を用いる
受信装置。
(15)上記パラメータセット領域は、SPS NALユニットの領域である
前記(14)に記載の受信装置。
(16)上記コンテナのレイヤに、上記ビデオストリームがハイダイナミックレンジに対応していることを示す識別情報が挿入されており、
上記情報抽出部は、上記識別情報に基づいて上記ビデオストリームのパラメータセット領域から上記メタ情報を抽出する
前記(14)または(15)に記載の受信装置。
(17)上記ビデオストリームの上記パラメータセット領域とは異なる領域に表示制御のためのメタ情報が含まれており、
上記表示制御のためのメタ情報に基づいて上記表示用ビデオデータに表示輝度調整を行う輝度調整部をさらに備える
前記(14)から(16)のいずれかに記載の受信装置。
(18)上記表示制御のためのメタ情報は表示輝度調整を許容する領域を示す領域情報を含み、
上記輝度調整部は、上記表示輝度調整を許容する領域で上記表示輝度調整を行う
前記(17)に記載の受信装置。
(19)上記コンテナのレイヤおよび/または上記ビデオストリームのレイヤに、上記ビデオストリームの表示輝度調整が禁止されるか否かを示す情報が挿入されており、
上記輝度調整部は、上記ビデオストリームの表示輝度調整が禁止されるか否かを示す情報が禁止されることを示すとき、上記表示用ビデオデータに表示輝度調整を行わない
前記(17)または(18)に記載の受信装置。
(20)受信部により、伝送ビデオデータが符号化されて得られたビデオストリームを含む所定フォーマットのコンテナを受信する受信ステップと、
上記ビデオストリームにデコード処理を施して上記伝送ビデオデータを得るデコードステップと、
上記デコードステップで得られた上記伝送ビデオデータに電光変換を行って表示用ビデオデータを得る電光変換ステップを有し、
上記伝送ビデオデータは、ハイダイナミックレンジデータにハイダイナミックレンジ光電変換が施されて得られたものであり、
上記ビデオストリームのパラメータセット領域に上記ハイダイナミックレンジ光電変換の特性に対応した電光変換特性を示すメタ情報が挿入されており、
上記電光変換ステップでは上記メタ情報が示す電光変換特性を用いる
受信方法。
100・・・送信装置
101・・・制御部
102・・・HDRカメラ
103・・・HDR光電変換部
103a・・・マスターモニタ
104・・・ビデオエンコーダ
105・・・システムエンコーダ
106・・・送信部
200・・・受信装置
200A・・・セットトップボックス
200B・・・モニタ
201・・・制御部
202・・・受信部
203・・・システムデコーダ
204・・・ビデオデコーダ
205・・・HDR電光変換部
206・・・HDR表示マッピング部
207・・・CEモニタ
Claims (20)
- ハイダイナミックレンジビデオデータにハイダイナミックレンジ光電変換を行って伝送ビデオデータを得る光電変換部と、
上記伝送ビデオデータにエンコード処理を施してビデオストリームを得るエンコード部と、
上記ビデオストリームを含む所定フォーマットのコンテナを送信する送信部と、
上記ビデオストリームのパラメータセット領域に上記ハイダイナミックレンジ光電変換特性に対応した電光変換特性を示すメタ情報を挿入する情報挿入部を備える
送信装置。 - 上記パラメータセット領域は、SPS NALユニットの領域である
請求項1に記載の送信装置。 - 上記情報挿入部は、上記コンテナのレイヤに、上記ビデオストリームがハイダイナミックレンジに対応していることを示す識別情報をさらに挿入する
請求項1に記載の送信装置。 - 上記識別情報には、上記ビデオストリームが通常ダイナミックレンジとの表示互換性があるか否を示す情報が付加される
請求項3に記載の送信装置。 - 上記識別情報には、上記ビデオストリームの表示輝度調整が禁止されるか否かを示す情報が付加される
請求項3に記載の送信装置。 - 上記コンテナは、トランスポートストリームであり、
上記情報挿入部は、上記識別情報を、プログラム・マップ・テーブル、あるいはイベント・インフォメーション・テーブルの配下に挿入する
請求項3に記載の送信装置。 - 上記コンテナは、MMTストリームであり、
上記情報挿入部は、上記識別情報を、MMT・パッケージ・テーブルの配下に挿入する
請求項3に記載の送信装置。 - 上記情報挿入部は、上記ビデオストリームの上記パラメータセット領域とは異なる領域に、表示制御のためのメタ情報をさらに挿入する
請求項1に記載の送信装置。 - 上記表示制御のためのメタ情報は、ピーク輝度情報を含む
請求項8に記載の送信装置。 - 上記表示制御のためのメタ情報は、表示輝度調整を許容する領域を示す領域情報を含む
請求項8に記載の送信装置。 - 上記表示制御のためのメタ情報は、上記ビデオストリームの表示輝度調整が禁止されるか否かを示す情報を含む
請求項8に記載の送信装置。 - 上記異なる領域は、SEI NALユニットの領域である
請求項8に記載の送信装置。 - ハイダイナミックレンジビデオデータにハイダイナミックレンジ光電変換を行って伝送ビデオデータを得る光電変換ステップと、
上記伝送ビデオデータにエンコード処理を施してビデオストリームを得るエンコードステップと、
送信部により、上記ビデオストリームを含む所定フォーマットのコンテナを送信する送信ステップと、
上記ビデオストリームのパラメータセット領域に上記ハイダイナミックレンジ光電変換特性に対応した電光変換特性を示すメタ情報を挿入する情報挿入ステップを有する
送信方法。 - 伝送ビデオデータが符号化されて得られたビデオストリームを含む所定フォーマットのコンテナを受信する受信部と、
上記ビデオストリームにデコード処理を施して上記伝送ビデオデータを得るデコード部と、
上記デコード部で得られた上記伝送ビデオデータに電光変換を行って表示用ビデオデータを得る電光変換部を備え、
上記伝送ビデオデータは、ハイダイナミックレンジデータにハイダイナミックレンジ光電変換が施されて得られたものであり、
上記ビデオストリームのパラメータセット領域に上記ハイダイナミックレンジ光電変換の特性に対応した電光変換特性を示すメタ情報が挿入されており、
上記ビデオストリームから上記メタ情報を抽出する情報抽出部をさらに備え、
上記電光変換部は、上記情報抽出部で抽出された上記メタ情報が示す電光変換特性を用いる
受信装置。 - 上記パラメータセット領域は、SPS NALユニットの領域である
請求項14に記載の受信装置。 - 上記コンテナのレイヤに、上記ビデオストリームがハイダイナミックレンジに対応していることを示す識別情報が挿入されており、
上記情報抽出部は、上記識別情報に基づいて上記ビデオストリームのパラメータセット領域から上記メタ情報を抽出する
請求項14に記載の受信装置。 - 上記ビデオストリームの上記パラメータセット領域とは異なる領域に表示制御のためのメタ情報が含まれており、
上記表示制御のためのメタ情報に基づいて上記表示用ビデオデータに表示輝度調整を行う輝度調整部をさらに備える
請求項14に記載の受信装置。 - 上記表示制御のためのメタ情報は表示輝度調整を許容する領域を示す領域情報を含み、
上記輝度調整部は、上記表示輝度調整を許容する領域で上記表示輝度調整を行う
請求項17に記載の受信装置。 - 上記コンテナのレイヤおよび/または上記ビデオストリームのレイヤに、上記ビデオストリームの表示輝度調整が禁止されるか否かを示す情報が挿入されており、
上記輝度調整部は、上記ビデオストリームの表示輝度調整が禁止されるか否かを示す情報が禁止されることを示すとき、上記表示用ビデオデータに表示輝度調整を行わない
請求項17に記載の受信装置。 - 受信部により、伝送ビデオデータが符号化されて得られたビデオストリームを含む所定フォーマットのコンテナを受信する受信ステップと、
上記ビデオストリームにデコード処理を施して上記伝送ビデオデータを得るデコードステップと、
上記デコードステップで得られた上記伝送ビデオデータに電光変換を行って表示用ビデオデータを得る電光変換ステップを有し、
上記伝送ビデオデータは、ハイダイナミックレンジデータにハイダイナミックレンジ光電変換が施されて得られたものであり、
上記ビデオストリームのパラメータセット領域に上記ハイダイナミックレンジ光電変換の特性に対応した電光変換特性を示すメタ情報が挿入されており、
上記電光変換ステップでは、上記メタ情報が示す電光変換特性を用いる
受信方法。
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