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公开(公告)号：US11228747B2
公开(公告)日：2022-01-18
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：US11153466B2
公开(公告)日：2021-10-19
申请号：US16331464
申请日：2018-02-26
Inventor： Masaya Yamamoto , Masayuki Kozuka , Yoshiichiro Kashiwagi , Toshiroh Nishio , Kazuhiko Kouno , Hiroshi Yahata , Takeshi Hirota , Yoshihiro Mori
IPC: G06T5/00 , G06T5/20 , H04N9/793 , H04N5/20 , H04N5/445 , H04N21/431 , H04N21/4402 , H04N9/82 , H04N5/66 , H04N21/47
Abstract: A video display apparatus 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：US10365443B2
公开(公告)日：2019-07-30
申请号：US15770967
申请日：2016-12-20
Inventor： Toshiroh Nishio , Naoshi Usuki , Satoshi Takahashi
Abstract: A connector includes a receptacle connectable to the conventional plug being compliant with an HDMI specification, and a plug connectable to the receptacle. The receptacle includes a tubular body forming a holding space that enables insertion of the conventional plug, a first recessed part forming a space that narrows heading from the holding space in an insertion direction of the plug, and a first transmission body having, as an end of an optical transmission line, a first end that is disposed to be exposed to the inserted plug. The plug includes an insertion part shaped to be insertable into the tubular body, a first projection that projects from the insertion part in the insertion direction and can fit into the first recessed part, and a second transmission body having, as an end of an optical transmission line, a second end that is disposed to face the first end.
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公开(公告)号：US10742945B2
公开(公告)日：2020-08-11
申请号：US16349931
申请日：2018-02-26
Inventor： Takeshi Hirota , Susumu Miyajima , Akira Yoneda , Yoshiichiro Kashiwagi , Toshiroh Nishio , Masayuki Kozuka
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：US10659745B2
公开(公告)日：2020-05-19
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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Patent Agency Ranking
公开(公告)号：US09832506B2
公开(公告)日：2017-11-28
申请号：US15504823
申请日：2015-08-18
Inventor： Masayuki Kozuka , Naoshi Usuki , Toshiroh Nishio , Satoshi Takahashi , Takahiro Nishi
IPC: H04N5/44 , H04N5/38 , H04N21/40 , H04N7/04 , G11B27/031
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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公开(公告)号：US11032448B2
公开(公告)日：2021-06-08
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
IPC: H04N5/445 , H04N5/20 , H04N21/431 , H04N21/4402 , H04N9/82 , H04N5/66 , H04N21/47 , G06T5/00 , G06T5/20 , H04N9/793
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：US10931915B2
公开(公告)日：2021-02-23
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：US10692630B2
公开(公告)日：2020-06-23
申请号：US16303170
申请日：2017-05-30
Inventor： Toshiroh Nishio , Naoshi Usuki , Satoshi Takahashi
IPC: H01B11/22 , G02B6/44 , H01B7/08 , H01R24/60 , H01R107/00
Abstract: A cable assembly includes a cable, a connector that is provided at an end of the cable in a direction in which the cable extends, a plurality of electric transmission lines configured to transmit an electric signal, and a plurality of optical transmission lines configured to transmit an optical signal. The plurality of electric transmission lines and the plurality of optical transmission lines are provided in the cable assembly so as to extend across the cable and the connector. The plurality of optical transmission lines are provided so that at least one of the plurality of optical transmission lines is provided at each of ends of the cable assembly in a width direction perpendicular to the direction in which the cable extends. The plurality of electric transmission lines are provided inside the plurality of optical transmission lines in the width direction.
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公开(公告)号：US11146737B2
公开(公告)日：2021-10-12
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: H04N5/235 , 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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