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公开(公告)号：US20200236334A1
公开(公告)日：2020-07-23
申请号：US16842250
申请日：2020-04-07
Inventor： Takeshi HIROTA , Susumu MIYAJIMA , Akira YONEDA , Yoshiichiro KASHIWAGI , Toshiroh NISHIO , Masayuki KOZUKA
Abstract: A video display device includes: a video receiver that receives video data including a video and dynamic luminance characteristics indicating a time-dependent change in luminance characteristics of the video; a tone mapping processor that, in the case where a luminance region having a luminance less than or equal to a first luminance is defined as a low luminance region, and a luminance region having a luminance exceeding the first luminance is defined as a high luminance region, (i) performs first tone mapping using first conversion characteristics when first luminance characteristics exceed a predetermined threshold value, and (ii) performs second tone mapping using second conversion characteristics when the first luminance characteristics are less than or equal to the predetermined threshold value.
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公开(公告)号：US20190342603A1
公开(公告)日：2019-11-07
申请号：US16349931
申请日：2018-02-26
Inventor： Takeshi HIROTA , Susumu MIYAJIMA , Akira YONEDA , Yoshiichiro KASHIWAGI , Toshiroh NISHIO , Masayuki KOZUKA
IPC: H04N21/431 , H04N5/20 , H04N5/66 , H04N5/92
Abstract: A luminance characteristics generation method includes: determining, for each of frames included in a video, a value as first luminance characteristics, the value being obtained by dividing the number of pixels having luminances less than or equal to a first luminance among all pixels included in the frame by the number of all the pixels included in the frame; and outputting the first luminance characteristics determined in the determining of the value.
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公开(公告)号：US20190335149A1
公开(公告)日：2019-10-31
申请号：US16349923
申请日：2018-02-26
Inventor： Takeshi HIROTA , Susumu MIYAJIMA , Akira YONEDA , Yoshiichiro KASHIWAGI , Toshiroh NISHIO , Masayuki KOZUKA
Abstract: A video display device includes: a video receiver that obtains video data including a video and dynamic luminance characteristics indicating a time-dependent change in luminance characteristics of the video; a tone mapping processor that, in the case where a luminance region having a luminance less than or equal to a first luminance is defined as a low luminance region, and a luminance region having a luminance exceeding the first luminance is defined as a high luminance region, (i) performs first tone mapping using first conversion characteristics when first luminance characteristics exceed a predetermined threshold value, and (ii) performs second tone mapping using second conversion characteristics when the first luminance characteristics are less than or equal to the predetermined threshold value.
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公开(公告)号：US20190208089A1
公开(公告)日：2019-07-04
申请号：US16323615
申请日：2018-02-26
Inventor： Toshiroh NISHIO , Masayuki KOZUKA , Makoto SERIZAWA , Toshiyuki FUKUSHIMA , Susumu MIYAJIMA , Takeshi HIROTA , Akihiro FUKE
CPC classification number: H04N5/04 , H04N5/4403 , H04N21/43 , H04N21/435 , H04N21/485
Abstract: There is provided a reproduction device that outputs a video signal to a display device via predetermined communication, the video signal including a video having pictures and corresponding pieces of image characteristic information. The reproduction device includes: an obtaining unit that obtains a first time difference between a timing at which the display device displays one picture among the pictures and a timing used by the display device to display one of the pieces of image characteristic information corresponding to the one picture; an adjuster that adjusts at least one of a timing at which the pictures are outputted and a timing at which the pieces of image characteristic information are outputted to reduce the first time difference; and an output unit that outputs the pictures and the pieces of image characteristic information via the predetermined communication at the time adjusted by the adjuster.
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