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公开(公告)号：US20200252683A1
公开(公告)日：2020-08-06
申请号：US16857419
申请日：2020-04-24
Inventor： Takahiro NISHI , Tadamasa TOMA
IPC: H04N21/4402 , G06T5/00 , H04N21/2343 , H04N21/235 , H04N21/431 , H04N21/435 , G09G5/10 , H04N7/01
Abstract: A transmission method in the present disclosure includes; obtaining an image and image signal characteristics information indicating one of an opto-electrical transfer function (OETF) or an electro-optical transfer function (EOTF) as image signal characteristics of the image; and transmitting a signal including the image and the image signal characteristics information. According to the transmission method in the present disclosure, a receiving device that received a high dynamic range (HDR) image and a standard dynamic range (SDR) image transmitted through broadcasting or the like can display these images appropriately.
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公开(公告)号：US20200236410A1
公开(公告)日：2020-07-23
申请号：US16838472
申请日：2020-04-02
Inventor： Noritaka IGUCHI , Tadamasa TOMA
IPC: H04N21/236 , H04N21/2389 , H04L29/06 , H04N21/44 , H04N21/2343 , H04N21/242 , H04N21/43 , H04N21/426 , H04N21/845 , H04N21/4385 , H04N21/434 , H04N21/24
Abstract: A transmitting device includes: a generator that generates an encoded stream by using rate control satisfying a determined definition of a receiving buffer model; and a transmitter that sequentially transmits a transmitting packet, and the receiving buffer model includes a first buffer that converts a packet into a first packet where the packet includes a packet header of a variable length, and the first packet includes a packet header of a fixed length of a decompressed header, a second buffer that converts the first packet into a second packet including a payload of a variable length, a third buffer that converts the second packet into a Network Abstraction Layer (NAL) unit, and a fourth buffer that outputs an access unit generated from a plurality of sequentially accumulated NAL units to a decoder at a timing of a decoding time corresponding to the access unit.
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83.发明申请公开(公告)号：US20200236407A1
公开(公告)日：2020-07-23
申请号：US16841910
申请日：2020-04-07
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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84.发明申请公开(公告)号：US20190387596A1
公开(公告)日：2019-12-19
申请号：US16557314
申请日：2019-08-30
Inventor： Virginie DRUGEON , Takahiro NISHI , Tadamasa TOMA
IPC: H05B37/02 , H05B33/08 , H04N21/236 , H02M1/14 , H02M1/084 , H04N19/70 , H04N7/01 , H04N21/2343 , H04N19/98 , H04N19/85 , H04N21/434 , H04N21/4402
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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公开(公告)号：US20190313051A1
公开(公告)日：2019-10-10
申请号：US16448480
申请日：2019-06-21
Inventor： Tadamasa TOMA , Kengo TERADA , Masayuki KOZUKA , Takahiro NISHI
IPC: H04N7/01 , G09G5/02 , H04N11/20 , H04N9/64 , G06T5/00 , G06F3/14 , H04N21/462 , H04N7/015 , H04N5/20 , G09G5/10 , H04N5/243 , H04N5/235
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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Patent Agency Ranking
86.发明申请公开(公告)号：US20190261487A1
公开(公告)日：2019-08-22
申请号：US16401779
申请日：2019-05-02
Inventor： Virginie DRUGEON , Takahiro NISHI , Tadamasa TOMA
IPC: H05B37/02 , H05B33/08 , H04N21/236 , H02M1/14 , H02M1/084 , H04N19/70 , H04N21/4402 , H04N7/01 , H04N21/2343 , H04N19/98 , H04N19/85 , H04N21/434
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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87.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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88.发明申请公开(公告)号：US20190075293A1
公开(公告)日：2019-03-07
申请号：US16086512
申请日：2017-03-23
Inventor： Chong Soon LIM , Takahiro NISHI , Tadamasa TOMA
IPC: H04N19/124 , H04N19/18 , H04N19/61 , H04N19/91 , H04N19/159
Abstract: The encoding method includes: inverse-quantizing one or more first transform coefficients quantized; deriving a quantization parameter based on the one or more first transform coefficients inverse-quantized; and inverse-quantizing a second transform coefficient quantized, based on the derived quantization parameter.
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89.发明申请公开(公告)号：US20180199073A1
公开(公告)日：2018-07-12
申请号：US15913172
申请日：2018-03-06
Inventor： Takahiro NISHI , Tadamasa TOMA
IPC: H04N19/98 , H04N19/46 , H04N19/44 , H04N19/136
CPC classification number: H04N19/98 , H04N19/136 , H04N19/44 , H04N19/46 , H04N19/895 , H04N21/23614 , H04N21/2362 , H04N21/431 , H04N21/434 , H04N21/4345 , H04N21/4348 , H04N21/845
Abstract: Provided is a video reception method performed by a video reception apparatus including a display. The video reception method includes: receiving a reception signal multiplexed from video data and audio data; outputting, as first transfer characteristics information, transfer characteristics obtained by demultiplexing the reception signal; outputting, as second transfer characteristics information, transfer characteristics obtained by decoding the video data, the second transfer characteristics information being information for specifying, at frame accuracy, a transfer function corresponding to a luminance dynamic range of the video data; and displaying the video data while controlling a luminance dynamic range of the display at frame accuracy according to the second transfer characteristics information.
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90.发明申请公开(公告)号：US20180192046A1
公开(公告)日：2018-07-05
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 , H04N19/136 , H04N19/176 , G06N99/00
CPC classification number: H04N19/103 , G06N20/00 , H04N19/11 , H04N19/117 , H04N19/136 , H04N19/14 , H04N19/176 , H04N19/46 , H04N19/82
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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