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公开(公告)号：US20210006689A1
公开(公告)日：2021-01-07
申请号：US16333894
申请日：2018-02-26
Inventor： Masaya YAMAMOTO , Masayuki KOZUKA , Yoshiichiro KASHIWAGI , Toshiroh NISHIO , Kazuhiko KOUNO , Hiroshi YAHATA , Takeshi HIROTA , Yoshihiro MORI
IPC: H04N5/20 , H04N21/431 , H04N21/435
Abstract: A video display system includes: a tone mapping processor; a display; and a metadata processor that generates first dynamic metadata that indicates a maximum luminance that is constant over a plurality of time intervals by using static metadata. The video display system switches between: a first operation of (i) generating the first dynamic metadata by using the static metadata, performed by the metadata processor and (ii) performing the tone mapping process by using the first dynamic metadata, performed by the tone mapping processor; and a second operation of performing the tone mapping process by using second dynamic metadata in which the maximum luminance varies over the plurality of time intervals, performed by the tone mapping processor.
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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：US20190251680A1
公开(公告)日：2019-08-15
申请号：US16333491
申请日：2018-02-26
Inventor： Masayuki KOZUKA , Masaya YAMAMOTO , Toshiroh NISHIO , Kazuhiko KOUNO , Yoshiichiro KASHIWAGI , Takeshi HIROTA , Hiroshi YAHATA , Yoshihiro MORI
CPC classification number: G06T5/009 , G06T5/50 , G06T11/60 , G06T2207/10016 , G06T2207/20208 , H04N5/20 , H04N5/66 , H04N21/431
Abstract: A video display apparatus includes: a video receiver that acquires video data including a main video; a generator that generates first characteristics information that indicates first dynamic luminance characteristics by using the video data when a luminance dynamic range format of the main video indicated by the video data is different from a display format that indicates a luminance dynamic range format displayable by the video display apparatus, the first dynamic luminance characteristics being dynamic luminance characteristics indicating a time-dependent change in luminance characteristics of the main video and correspond to the display format; a tone mapping processor that performs a tone mapping process of converting a luminance of the main video based on conversion characteristics according to the first dynamic luminance characteristics indicated by the first characteristics information generated by the generator; and a display that displays the main video that has undergone the tone mapping process.
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4.发明申请公开(公告)号：US20190335139A1
公开(公告)日：2019-10-31
申请号：US16303167
申请日：2017-05-30
Inventor： Toshiroh NISHIO , Naoshi USUKI , Satoshi TAKAHASHI
Abstract: A transmission apparatus includes a video obtainer configured to obtain a video signal, a first converter configured to convert the video signal into an electrical signal complying with a high definition multimedia interface (HDMI (registered trademark)) standard, a second converter configured to convert the video signal into an optical signal, and a signal processor configured to perform at least one of the conversion using the first converter and the conversion using the second converter with respect to the obtained video signal.
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公开(公告)号：US20190259355A1
公开(公告)日：2019-08-22
申请号：US16333507
申请日：2018-02-26
Inventor： Masayuki KOZUKA , Masaya YAMAMOTO , Toshiroh NISHIO , Kazuhiko KOUNO , Yoshiichiro KASHIWAGI , Takeshi HIROTA , Hiroshi YAHATA , Yoshihiro MORI
Abstract: A video processing system includes: an acquirer that acquires video data including a main video; a format acquirer that acquires a display format that indicates a luminance dynamic range format displayable by a video display apparatus; a generator that generates first characteristics information that indicates first dynamic luminance characteristics that correspond to the display format by using the video data when a luminance dynamic range format of the main video indicated by the video data is different from the display format, the first dynamic luminance characteristics being dynamic luminance characteristics indicating a time-dependent change in luminance characteristics of the main video; and a video transmitter that outputs the first characteristics information generated by the generator.
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Patent Agency Ranking
公开(公告)号：US20180348852A1
公开(公告)日：2018-12-06
申请号：US16100600
申请日：2018-08-10
Inventor： Satoshi TAKAHASHI , Naoshi USUKI , Toshiroh NISHIO
IPC: G06F3/00 , H04B10/80 , H04N21/436 , H04N21/442
CPC classification number: G06F3/005 , G06F3/00 , H04B10/80 , H04N21/436 , H04N21/43632 , H04N21/442
Abstract: An AV signal input/output system includes an AV signal output device, an AV signal input device, and a cable which connects between the devices. The AV signal output device includes an existing interface, an optical interface, a selection output controller which selects existing interface differential signals or optical output signals, and outputs an AV signal, and an information identification unit which reads out information of the connected destination of a connector through existing interface signal lines. The information identification unit includes an optical information identification unit which identifies optical information. The AV signal input device includes an existing interface, an optical interface, a selection input controller which selects existing interface differential signals or optical input signals, and outputs an AV signal, and information storage which causes a connector to read out information through existing interface signal lines. The information storage includes optical information storage.
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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：US20190394384A1
公开(公告)日：2019-12-26
申请号：US16333885
申请日：2018-02-26
Inventor： Masaya YAMAMOTO , Masayuki KOZUKA , Yoshiichiro KASHIWAGI , Toshiroh NISHIO , Kazuhiko KOUNO , Hiroshi YAHATA , Takeshi HIROTA , Yoshihiro MORI
IPC: H04N5/235
Abstract: A video display apparatus includes: a tone mapping processor that converts, by using dynamic metadata indicating a maximum luminance of a video in each of a plurality of time intervals included in a predetermined period, a luminance of the video in each time interval based on conversion characteristics according to the maximum luminance of the video in the time interval; and a display. The tone mapping processor switches between: a first operation of performing the tone mapping process by using first dynamic metadata that indicates the maximum luminance that is constant over the plurality of time intervals, the first dynamic metadata being generated by using static metadata that indicates a maximum luminance of the video in the predetermined period; and a second operation of performing the tone mapping process by using second dynamic metadata in which the maximum luminance varies over the plurality of time intervals.
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公开(公告)号：US20190222721A1
公开(公告)日：2019-07-18
申请号：US16331456
申请日：2018-02-26
Inventor： Masaya YAMAMOTO , Masayuki KOZUKA , Yoshiichiro KASHIWAGI , Toshiroh NISHIO , Kazuhiko KOUNO , Hiroshi YAHATA , Takeshi HIROTA , Yoshihiro MORI
CPC classification number: H04N5/20 , G06T5/009 , G06T5/20 , G06T2207/20208 , H04N5/44504 , H04N5/44543 , H04N5/66 , H04N9/793 , H04N21/431
Abstract: A video display system includes: a tone mapping processor that performs a tone mapping process of converting a luminance of a video by using conversion characteristics according to a maximum luminance of the video; and a display that displays the video that has undergone the tone mapping process. The tone mapping processor switches between a first tone mapping process of dynamically changing the conversion characteristics according to a time-dependent change in the maximum luminance of the video and a second tone mapping process that is performed using constant conversion characteristics irrespective of the time-dependent change in the maximum luminance of the video.
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公开(公告)号：US20170280184A1
公开(公告)日：2017-09-28
申请号：US15504823
申请日：2015-08-18
Inventor： Masayuki KOZUKA , Naoshi USUKI , Toshiroh NISHIO , Satoshi TAKAHASHI , Takahiro NISHI
IPC: H04N21/40 , H04N7/04 , G11B27/031 , H04N5/44
CPC classification number: H04N21/40 , G11B27/031 , H04N5/44 , H04N5/4401 , H04N5/775 , H04N7/04 , H04N21/436 , H04N21/43635
Abstract: An AV signal transmission and receiving system capable of appropriately receiving an AV signal includes a source apparatus and a sink apparatus connected to the source apparatus via an HDMI (registered trademark) cable. The sink apparatus includes: an AV signal receiving unit which receives an AV signal via the HDMI cable; a memory which holds the EDID; a rewriting unit which rewrites the EDID; an HPD control unit which controls output of an HPD signal; and a determining unit which: determines whether the AV signal which has been received is an HDMI signal conforming to an HDMI standard or a digital visual interface (DVI) signal; and when the determining unit determines that the AV signal is a DVI signal, instructs the rewriting unit to rewrite the EDID and instructs the HPD control unit to output the HPD signal indicating that reading of the EDID which has been rewritten is possible.
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