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公开(公告)号：US11588998B2
公开(公告)日：2023-02-21
申请号：US17474404
申请日：2021-09-14
Inventor： Tadamasa Toma , Kengo Terada , Masayuki Kozuka , Takahiro Nishi
IPC: H04N7/01 , G06F3/14 , G09G5/10 , H04N5/20 , H04N7/015 , H04N9/64 , H04N21/462 , H04N11/20 , H04N5/235 , H04N5/243 , G06T5/00 , G09G5/02
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：US11425382B2
公开(公告)日：2022-08-23
申请号：US17231167
申请日：2021-04-15
Inventor： Satoshi Yoshikawa , Takahiro Nishi , Kengo Terada
IPC: H04N11/02 , H04N19/124 , H04N19/176 , H04N19/126 , H04N19/154 , H04N19/159 , H04N19/46 , H04N19/136
Abstract: An encoding method which allows reduction in the amount of codes is provided. The encoding method includes: setting step S11 for setting a quantization matrix set; quantization step S12 for performing quantization on a target block using the selected quantization matrix; and encoding step S13 for encoding, in a mutually associated manner, the target block which has been subjected to the quantization and identification information for identifying the quantization matrix set which has been set. In setting step S11, a quantization matrix set selected from a plurality of quantization matrix sets is set as the quantization matrix set to be used to perform the quantization on the target block, the plurality of quantization matrix sets including a custom quantization matrix set which is arbitrarily specified and a plurality of defined quantization matrix sets which have been respectively defined in advance.
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公开(公告)号：US11240463B2
公开(公告)日：2022-02-01
申请号：US17099050
申请日：2020-11-16
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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4.发明授权公开(公告)号：US11140354B2
公开(公告)日：2021-10-05
申请号：US16850314
申请日：2020-04-16
Inventor： Tadamasa Toma , Masayuki Kozuka , Takahiro Nishi , Kengo Terada
IPC: H04N5/57 , H04N9/68 , H04N5/20 , G09G5/10 , H04N5/765 , H04N21/436 , H04N21/84 , G11B20/10 , G11B27/10 , G11B27/30 , H04N5/775 , H04N7/08 , H04N21/4363 , 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：US10708560B2
公开(公告)日：2020-07-07
申请号：US16600764
申请日：2019-10-14
Inventor： Masayuki Kozuka , Takahiro Nishi , Kengo Terada , Tadamasa Toma
IPC: H04N9/64 , H04N11/24 , H04N21/431 , H04N21/435 , H04N21/45 , H04N5/202 , H04N21/4363 , H04N21/4402 , G09G5/00 , G09G5/10 , H04N9/87 , H04N21/234 , G06T5/00 , G11B27/00
Abstract: In a reproduction technique, a video stream is any of a hybrid stream quantized based on a hybrid optical-electro transfer function (OETF), a High Dynamic Range (HDR) stream quantized based on a non-hybrid OETF, or a Standard Dynamic Range (SDR) stream quantized based on a non-hybrid OETF. Attribute information is received which indicates whether a display apparatus is configured to display at least one of the HDR stream or the SDR stream. Any one of the hybrid stream, the HDR stream, or the SDR stream is transmitted to the display apparatus, or to a reproduction apparatus to which the display apparatus is connected, based on the attribute information.
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Patent Agency Ranking
公开(公告)号：US10681306B2
公开(公告)日：2020-06-09
申请号：US16448480
申请日：2019-06-21
Inventor： Tadamasa Toma , Kengo Terada , Masayuki Kozuka , Takahiro Nishi
IPC: H04N7/01 , G06F3/14 , G09G5/10 , H04N5/20 , H04N7/015 , H04N9/64 , H04N21/462 , H04N11/20 , H04N5/235 , H04N5/243 , G06T5/00 , G09G5/02
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：US10484657B2
公开(公告)日：2019-11-19
申请号：US16381812
申请日：2019-04-11
Inventor： Masayuki Kozuka , Takahiro Nishi , Kengo Terada , Tadamasa Toma
IPC: H04N9/64 , H04N5/202 , H04N9/87 , H04N21/4402 , H04N21/4363 , G11B27/00 , G06T5/00 , H04N21/431 , H04N21/45 , H04N21/435 , G09G5/10 , G09G5/00 , H04N21/234 , H04N11/24
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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8.发明申请公开(公告)号：US20190238788A1
公开(公告)日：2019-08-01
申请号：US16378948
申请日：2019-04-09
Inventor： Tadamasa TOMA , Masayuki Kozuka , Takahiro Nishi , Kengo Terada
IPC: H04N5/57 , G11B20/10 , H04N5/765 , H04N7/08 , H04N21/436 , H04N5/775 , H04N9/68 , H04N21/4363 , H04N21/84 , H04N5/20 , G09G5/10
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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9.发明授权公开(公告)号：US10291874B2
公开(公告)日：2019-05-14
申请号：US15596218
申请日：2017-05-16
Inventor： Tadamasa Toma , Masayuki Kozuka , Takahiro Nishi , Kengo Terada
IPC: H04N5/57 , H04N5/765 , H04N21/436 , H04N9/68 , H04N5/20 , H04N5/10 , H04N5/775 , H04N7/08 , G11B20/10 , H04N21/84 , G09G5/10 , H04N21/4363 , 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：US09807411B2
公开(公告)日：2017-10-31
申请号：US14656509
申请日：2015-03-12
Inventor： Kengo Terada , Hisao Sasai , Satoshi Yoshikawa
CPC classification number: H04N19/50 , H04N5/23229 , H04N19/573 , H04N19/58
Abstract: An image coding apparatus is an image coding apparatus which encodes a plurality of to-be-displayed images forming video by using inter prediction. The image coding apparatus includes an obtaining unit that obtains a reference-specific image which is an image different from the plurality of to-be-displayed images or different from a plurality of reconfigured images obtained by reconfiguration of the plurality of to-be-displayed images and which is an image used as an image that is specific to reference for the inter prediction, and an encoding unit that encodes one or more to-be-displayed images among the plurality of to-be-displayed images by referring to the reference-specific image as a reference image for the inter prediction.
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