摘要:
A data playback method according to one aspect of the present disclosure is a data playback method for displaying a video in a first luminance range with graphics being superimposed on the video. The method includes: determining whether a playback device has a function for converting first graphics in a second luminance range narrower than the first luminance range to second graphics in the first luminance range; when the playback device has the function, causing the playback device to convert the first graphics to the second graphics and to display the video with the second graphics being superimposed on the video; and when the playback device does not have the function, causing the playback device to display the video with third graphics different from the second graphics being superimposed on the video.
摘要:
A playback method according to one aspect of the present disclosure is performed by a Blu-ray device connected to a display device. The playback method includes a first obtaining step of obtaining a type of the display device connected to the Blu-ray device; a second obtaining step of obtaining a video signal recorded on a recording medium; and an outputting step of selecting each of a version of HDMI and a version of HDCP according to the obtained type of the display device, and encrypting the obtained video signal using the HDCP of the selected version and outputting the encrypted video signal to the display device using the HDMI of the selected version.
摘要:
A data output apparatus includes: a video decoder that decodes a video stream to generate a first video signal; an external metadata acquisition unit that acquires one or more pieces of metadata corresponding to one or more first conversion modes; an HDR metadata interpreter that interprets one of the one or more pieces of metadata to acquire characteristic data and conversion auxiliary data; a DR converter that supports one or more second conversion modes and performs conversion processing of a luminance range of the first video signal based on the conversion auxiliary data to generate a second video signal; and an HDMI output unit that outputs the second video signal to a display apparatus.
摘要:
A data output apparatus according to one aspect of the present disclosure includes: a video decoder that decodes a video stream to generate a first video signal with a first luminance range; an external metadata acquisition unit that acquires first metadata regarding a luminance range of the first video signal; an HDR metadata interpreter that interprets the first metadata to acquire characteristic data indicating the luminance range of the first video signal; an HDR control information generator that converts the characteristic data into HDR control information according to a predetermined transmission protocol; and an HDMI output unit that outputs the HDR control information in accordance with the predetermined transmission protocol.
摘要:
A transmission method in the present disclosure includes; obtaining an image for data broadcasting and image signal characteristics information indicating one of an opto-electrical transfer function (OETF) or an electro-optical transfer function (EOTF) as image signal characteristics of the image; and transmitting a data broadcast signal including the image for the data broadcasting and the image signal characteristics information through the data broadcasting. According to the transmission method in the present disclosure, a receiving device that received a high dynamic range (HDR) image and a standard dynamic range (SDR) image transmitted through broadcasting or the like can display these images appropriately.
摘要:
A decoding apparatus includes: a receiver that receives a transfer frame that stores a plurality of second transfer units that each contain one or more first transfer units obtained by multiplexing of content; and a decoder that acquires a plurality of first transfer units by decoding the transfer frame, the decoder outputting the plurality of first transfer units to a demultiplexing apparatus that acquires the content by demultiplexing the plurality of first transfer units. A first transfer unit positioned at a head within a second transfer unit positioned at a head within the transfer frame contains reference clock information. The decoder further generates information for identifying the first transfer unit positioned at a head, and outputs the information to the demultiplexing apparatus.
摘要:
A conversion method for converting luminance of a video, including a luminance value in a first luminance range, to be displayed on a display apparatus includes: acquiring a first luminance signal indicating a code value obtained by quantization of the luminance value of the video; and converting the code value indicated by the acquired first luminance signal into a second luminance value determined based on a luminance range of the display apparatus, the second luminance value being compatible with a second luminance range with a maximum value smaller than a maximum value of the first luminance range and larger than 100 nit. This provides the conversion method capable of achieving further improvement.
摘要:
A file producing method according to one aspect of the present disclosure for producing an MP4 file from an elementary stream includes the steps of: acquiring a play list including identification information indicating each of a plurality of elementary streams; selecting an elementary stream indicated by predetermined identification information from the acquired play list; and producing the MP4 file by converting data included in the elementary stream into an MP4 file format based on a manifest file corresponding to the selected elementary stream, the manifest file being necessary for the conversion of a file format based on a predetermined rule.
摘要:
In a reproduction method that reproduces a video stream, the video stream has a first dynamic range where a maximum value of a luminance dynamic range is more than 100 nits, a display apparatus displays video in a second dynamic range narrower than the first dynamic range, and it is determined whether the video stream is quantized based on a hybrid OETF. When it is determined that the video stream is quantized based on the hybrid OETF, the video stream is reproduced without performing luminance conversion on the video stream, the luminance conversion converting from the first dynamic range to the second dynamic range. When it is determined that the video stream is not quantized based on the hybrid OETF, the luminance conversion is performed on the video stream and the video stream is reproduced.
摘要:
A transmission method includes: generating a frame for transfer which stores one or more first internet protocol (IP) packets storing content, and one or more second IP packets, each including reference clock information which indicates a time for a playback of the content (S421); and transmitting the generated frame through broadcasting (S422). In the generating (S421), header compression is performed on the one or more first IP packets and the header compression is not performed on the one or more second IP packets.