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公开(公告)号：US10764574B2
公开(公告)日：2020-09-01
申请号：US15739927
申请日：2016-03-18
Inventor： Han Boon Teo , Chong Soon Lim , Takahiro Nishi , Kengo Terada , Tadamasa Toma
IPC: H04N19/103 , H04N19/11 , G06N20/00 , H04N19/176 , H04N19/136 , H04N19/82 , H04N19/117 , H04N19/14 , H04N19/46
Abstract: To provide an encoding method for reducing deterioration in encoding efficiency when encoding a video/an image by selecting one operation mode out of a number of operation modes. The encoding method includes: extracting one or more features from one or more reconstructed pixel groups; categorizing the one or more reconstructed pixel groups using the extracted one or more features and a first machine learning model; and performing an encoding process on a current block of image samples included in a current picture using a parameter set corresponding to a result of the categorizing, the parameter set being one of a plurality of predefined parameter sets.
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公开(公告)号：US10687014B2
公开(公告)日：2020-06-16
申请号：US16575701
申请日：2019-09-19
Inventor： Kengo Terada , Masayuki Kozuka , Takahiro Nishi , Tadamasa Toma
IPC: H04N5/57 , H04N7/01 , H04N7/015 , H04N9/79 , H04N9/87 , H04N5/76 , G09G5/10 , H04N5/20 , G06F3/14
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：US10306197B2
公开(公告)日：2019-05-28
申请号：US15610991
申请日：2017-06-01
Inventor： Masayuki Kozuka , Takahiro Nishi , Kengo Terada , Tadamasa Toma
IPC: H04N9/64 , G09G5/00 , G09G5/10 , H04N21/431 , H04N9/87 , H04N11/24 , H04N21/234 , G06T5/00 , H04N21/435 , H04N21/45 , G11B27/00 , H04N5/202 , H04N21/4363 , H04N21/4402
Abstract: In a reproduction method, a first video stream has a first dynamic range where a maximum value of a luminance dynamic range is more than 100 nits, and a display apparatus displays video in a second dynamic range narrower than the first dynamic range. The method determines whether the first video stream is quantized based on a hybrid OETF. When it is determined that the first video stream is quantized based on the hybrid OETF, the first video stream is reproduced. When it is determined that the first video stream is not quantized based on the hybrid OETF, a luminance dynamic range of the first video stream is converted from the first dynamic range to the second dynamic range to obtain a second video stream, and the second video stream is reproduced.
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34.发明授权公开(公告)号：US10306175B2
公开(公告)日：2019-05-28
申请号：US15383209
申请日：2016-12-19
Inventor： Tadamasa Toma , Masayuki Kozuka , Takahiro Nishi , Kengo Terada
IPC: H04N21/436 , H04N5/57 , H04N5/765 , H04N21/84 , H04N9/68 , H04N5/20 , G09G5/10 , H04N5/775 , H04N7/08 , H04N21/4363 , G11B20/10 , G09G5/00
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：US10171812B2
公开(公告)日：2019-01-01
申请号：US15006820
申请日：2016-01-26
Inventor： Tadamasa Toma , Masayuki Kozuka , Takahiro Nishi , Kengo Terada
IPC: H04N19/136 , H04N19/44 , H04N19/46 , H04N19/70 , H04N7/08 , H04N19/85 , H04N21/84 , H04N5/57 , H04N21/4402 , H04N7/025 , H04N21/462 , H04N21/63 , H04N21/41 , H04N21/4363 , H04N21/436 , H04N21/61
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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Patent Agency Ranking
公开(公告)号：US10136181B2
公开(公告)日：2018-11-20
申请号：US15593478
申请日：2017-05-12
Inventor： Masayuki Kozuka , Tadamasa Toma , Kengo Terada , Takahiro Nishi
IPC: H04N5/775 , H04N5/765 , H04N9/80 , H04N21/4363 , H04N5/92 , H04N7/167 , H04N21/835 , H04N21/432 , H04N21/4402 , H04N21/4408 , H04N7/015
Abstract: A playback method according to one aspect of the present disclosure is performed by a playback device connected to a display device. The playback method includes obtaining a type of the display device; selecting each of a version of High-Definition Multimedia Interface (HDMI) and a version of High-bandwidth Digital Content Protection (HDCP), according to the obtained type of the display device; obtaining a video signal of content recorded on a recording medium; decoding the obtained video signal; encrypting the decoded video signal using the selected version of HDCP; and outputting the encrypted video signal to the display device using the selected version of HDMI.
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公开(公告)号：US10033958B2
公开(公告)日：2018-07-24
申请号：US15583071
申请日：2017-05-01
Inventor： Kengo Terada , Masayuki Kozuka , Takahiro Nishi , Tadamasa Toma
IPC: H04N5/57 , G09G5/10 , H04N5/20 , G06F3/14 , H04N5/76 , H04N7/01 , 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：US09924146B2
公开(公告)日：2018-03-20
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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公开(公告)号：US09736419B2
公开(公告)日：2017-08-15
申请号：US15075228
申请日：2016-03-21
Inventor： Masayuki Kozuka , Tadamasa Toma , Kengo Terada , Takahiro Nishi
CPC classification number: H04N5/57 , G06F3/14 , G09G2360/16 , G09G2370/022 , G09G2370/04 , H04N5/20
Abstract: In a converting method for converting luminance of an input video in order to display the video on a display device, the luminance of the video is a first luminance value in a first luminance range where a maximum luminance value is defined as a first maximum luminance value that exceeds 100 nit. The method includes acquiring a first luminance signal indicating a first luminance value of the video, selecting a luminance converting process to be executed from among a plurality of luminance converting processes based on a reference luminance value corresponding to reference reflectance included in first meta data of the acquired first luminance signal, converting the first luminance value indicated by the acquired first luminance signal into a second luminance value in a second luminance range where a maximum luminance value is defined as a second maximum luminance value that is smaller than the first maximum luminance value and larger than 100 nit based on the selected luminance converting process.
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公开(公告)号：US11968470B2
公开(公告)日：2024-04-23
申请号：US17682180
申请日：2022-02-28
Inventor： Kengo Terada , Masayuki Kozuka , Takahiro Nishi , Tadamasa Toma
IPC: H04N5/57 , G06F3/14 , G09G5/10 , H04N5/20 , H04N5/76 , H04N7/01 , H04N7/015 , H04N9/79 , H04N9/87
CPC classification number: H04N5/57 , G06F3/14 , G09G5/10 , H04N5/20 , H04N5/76 , H04N7/01 , H04N7/0125 , H04N7/015 , H04N9/7925 , H04N9/87 , G09G2320/0276 , G09G2370/04
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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