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公开(公告)号：US20230156148A1
公开(公告)日：2023-05-18
申请号：US18100114
申请日：2023-01-23
Inventor： Tadamasa TOMA , Kengo TERADA , Masayuki KOZUKA , Takahiro NISHI
IPC: H04N7/01 , G06F3/14 , G09G5/10 , H04N5/20 , H04N23/71 , H04N23/76 , H04N7/015 , H04N9/64 , H04N21/462 , H04N11/20 , G06T5/00 , G09G5/02
CPC classification number: H04N7/0125 , G06F3/14 , G09G5/10 , H04N5/20 , H04N23/71 , H04N23/76 , H04N7/01 , H04N7/015 , H04N9/642 , H04N21/4621 , H04N9/64 , H04N11/20 , G06T5/009 , G09G5/026 , G09G2320/0276 , G09G2370/04
Abstract: 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.
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公开(公告)号：US20220191425A1
公开(公告)日：2022-06-16
申请号：US17682139
申请日：2022-02-28
Inventor： Kengo TERADA , Masayuki KOZUKA , Takahiro NISHI , Tadamasa TOMA
IPC: H04N5/57 , G06F3/14 , H04N5/76 , H04N7/01 , G09G5/10 , H04N5/20 , H04N7/015 , H04N9/79 , H04N9/87
Abstract: A display system includes a conversion apparatus converting video luminance including a luminance value in a first luminance range and a display apparatus connected thereto and displaying the video. The conversion apparatus includes a first acquisition unit, a first luminance converter, a second luminance converter, a quantization converter, and an output unit outputting a third luminance signal to the display apparatus. The display apparatus includes: a second acquisition unit acquiring the third luminance signal and setting information indicating display settings recommended to the display apparatus in display of the video; a display setting unit setting the display apparatus, using the setting information; a third luminance converter converting a third code value indicated by the third luminance signal into a second luminance value compatible with a second luminance range, using the setting information; and a display controller displaying the video on the display apparatus based on the second luminance value.
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公开(公告)号：US20220159264A1
公开(公告)日：2022-05-19
申请号：US17592879
申请日：2022-02-04
Inventor： Tadamasa TOMA , Masayuki KOZUKA , Takahiro NISHI , Kengo TERADA
IPC: H04N19/136 , H04N19/85 , H04N21/41 , H04N21/4363 , H04N21/462 , H04N21/84 , H04N21/4402 , H04N21/63 , H04N19/44 , H04N19/46 , H04N19/70 , H04N7/025 , H04N7/08
Abstract: 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.
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公开(公告)号：US20220086510A1
公开(公告)日：2022-03-17
申请号：US17536359
申请日：2021-11-29
Inventor： Tadamasa TOMA , Takahiro NISHI , Noritaka IGUCHI
IPC: H04N21/2343 , H04N21/485 , H04N21/236 , H04N21/234 , H04N21/4402 , H04N21/434 , H04N19/89 , H04N19/30 , G06T5/00
Abstract: A video transmission method according to the present disclosure includes: generating a transmission signal including, in a time series, first video data having a first luminance dynamic range and second video data having a second luminance dynamic range wider than the first luminance dynamic range; and transmitting the transmission signal generated. In the generating of the transmission signal, a signal level corresponding to a luminance value is limited to a value lower than a limit value that is predetermined, in a transition period provided for switching from one of the first video data and the second video data to the other.
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公开(公告)号：US20210075995A1
公开(公告)日：2021-03-11
申请号：US16950261
申请日：2020-11-17
Inventor： Kengo TERADA , Masayuki KOZUKA , Takahiro NISHI , Tadamasa TOMA
IPC: H04N5/57 , G06F3/14 , H04N5/76 , H04N7/01 , G09G5/10 , H04N5/20 , H04N7/015 , H04N9/79 , H04N9/87
Abstract: A display system includes a conversion apparatus converting video luminance including a luminance value in a first luminance range and a display apparatus connected thereto and displaying the video. The conversion apparatus includes a first acquisition unit, a first luminance converter, a second luminance converter, a quantization converter, and an output unit outputting a third luminance signal to the display apparatus. The display apparatus includes: a second acquisition unit acquiring the third luminance signal and setting information indicating display settings recommended to the display apparatus in display of the video; a display setting unit setting the display apparatus, using the setting information; a third luminance converter converting a third code value indicated by the third luminance signal into a second luminance value compatible with a second luminance range, using the setting information; and a display controller displaying the video on the display apparatus based on the second luminance value.
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Patent Agency Ranking
公开(公告)号：US20190238814A1
公开(公告)日：2019-08-01
申请号：US16381812
申请日：2019-04-11
Inventor： Masayuki KOZUKA , Takahiro NISHI , Kengo TERADA , Tadamasa TOMA
IPC: H04N9/64 , H04N11/24 , H04N5/202 , H04N9/87 , H04N21/4402 , H04N21/4363 , G11B27/00 , G06T5/00 , H04N21/431 , H04N21/45 , H04N21/435 , G09G5/10 , G09G5/00 , H04N21/234
Abstract: In a reproduction method, a video stream has a first dynamic range where a maximum value of a luminance dynamic range is more than a predetermined luminance value, and a display apparatus displays video in a second dynamic range narrower than the first dynamic range. The reproduction method displays video based on a first reproduction signal or a second reproduction signal. The first reproduction signal is obtained by: reproducing a first video stream quantized based on a hybrid OETF without performing luminance conversion; or reproducing the first video stream subjected to the luminance conversion. The second reproduction signal is obtained by performing the luminance conversion on a second video stream not quantized based on the hybrid OETF, and reproducing the second video stream subjected to the luminance conversion.
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公开(公告)号：US20190075296A1
公开(公告)日：2019-03-07
申请号：US16184323
申请日：2018-11-08
Inventor： Tadamasa TOMA , Masayuki KOZUKA , Takahiro NISHI , Kengo TERADA
IPC: H04N19/136 , H04N19/85 , H04N21/462 , H04N21/4363 , H04N21/41 , H04N21/63
Abstract: 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.
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58.发明申请公开(公告)号：US20180352632A1
公开(公告)日：2018-12-06
申请号：US16103411
申请日：2018-08-14
Inventor： Virginie DRUGEON , Takahiro NISHI , Tadamasa TOMA
CPC classification number: H05B37/0209 , H02M1/084 , H02M1/14 , H02M2001/0009 , H04N7/0117 , H04N19/70 , H04N19/85 , H04N19/98 , H04N21/2343 , H04N21/236 , H04N21/23614 , H04N21/4345 , H04N21/4402 , H05B33/0815
Abstract: A data generation method is for generating video data that covers a second luminance dynamic range wider than a first luminance dynamic range and has reproduction compatibility with a first device that does not support reproduction of video having the second luminance dynamic range and supports reproduction of video having the first luminance dynamic range, and includes: generating a video signal to be included in the video data using a second OETF; storing, into VUI in the video data, first transfer function information for identifying a first OETF to be referred to by the first device when the first device decodes the video data; and storing, into SEI in the video data, second transfer function information for identifying a second OETF to be referred to by a second device supporting reproduction of video having the second luminance dynamic range when the second device decodes the video data.
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59.发明申请公开(公告)号：US20170251161A1
公开(公告)日：2017-08-31
申请号：US15596218
申请日：2017-05-16
Inventor： Tadamasa TOMA , Masayuki KOZUKA , Takahiro NISHI , Kengo TERADA
IPC: H04N5/57 , H04N7/08 , H04N21/4363 , H04N21/436 , H04N21/84
CPC classification number: H04N5/57 , G09G5/005 , G09G5/006 , G09G5/10 , G09G2320/0673 , G09G2340/0407 , G09G2340/0428 , G09G2370/04 , G09G2370/12 , G11B20/10 , H04N5/20 , H04N5/765 , H04N5/775 , H04N7/08 , H04N9/68 , H04N21/436 , H04N21/43622 , H04N21/43635 , H04N21/84
Abstract: An apparatus according to one aspect of the present disclosure includes: one or more memories, and circuitry which, in operation; decodes a video stream to generate a first video signal with a first luminance range; acquires characteristic data indicating the luminance range of the first video signal; converts the characteristic data into control information according to a predetermined transmission protocol; and outputs the control information in accordance with the predetermined transmission protocol.
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公开(公告)号：US20170237959A1
公开(公告)日：2017-08-17
申请号：US15584335
申请日：2017-05-02
Inventor： Tadamasa TOMA , Kengo TERADA , Masayuki KOZUKA , Takahiro NISHI
CPC classification number: H04N7/0125 , G06F3/14 , G06T5/009 , G09G5/026 , G09G5/10 , G09G2320/0276 , G09G2370/04 , H04N5/20 , H04N5/2351 , H04N5/243 , H04N7/01 , H04N7/015 , H04N9/64 , H04N9/642 , H04N11/20 , H04N21/4621
Abstract: 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.
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