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公开(公告)号：US20190306482A1
公开(公告)日：2019-10-03
申请号：US16447211
申请日：2019-06-20
Inventor： Tadamasa TOMA , Masayuki KOZUKA , Takahiro NISHI
Abstract: In a converting method relating to picture luminance according to one aspect of the present disclosure, the picture luminance is formed by luminance values in a first luminance range. In this method, a first luminance signal that indicates code values obtained by quantizing the luminance value of the picture is obtained, code values, which are associated with the code values indicated by the obtained first luminance signal by quantization for a second luminance range different in a maximum value from the first luminance range are determined as converted code values, and the first luminance signal is converted into a second luminance signal indicating the converted code values. As a result, the converting method is further improved.
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12.发明申请公开(公告)号：US20190261488A1
公开(公告)日：2019-08-22
申请号：US16401780
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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13.发明申请公开(公告)号：US20190230407A1
公开(公告)日：2019-07-25
申请号：US16371607
申请日：2019-04-01
Inventor： Tadamasa TOMA , Hiroshi YAHATA , Tomoki OGAWA
IPC: H04N21/436 , H04N21/44 , H04N21/4402 , H04N5/57 , H04N21/435 , H04N21/432
Abstract: A transmitting method according to one aspect of the present disclosure is a transmitting method of a playback device, and includes: when a version of a transmission protocol is a first version, transmitting first meta data to a display device without transmitting second meta data to the display device, the transmission protocol being used to transmit a signal between the playback device and the display device, the first meta data including information that is commonly used for a plurality of images included in a continuous playback unit of a first video signal and relates to a luminance range of the first video signal, and the second meta data including information that is commonly used for a unit subdivided compared to the continuous playback unit of the first video signal and relates to the luminance range of the first video signal; and when the version of the transmission protocol is a second version, transmitting the first meta data and the second meta data to the display device.
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公开(公告)号：US20190141285A1
公开(公告)日：2019-05-09
申请号：US16241138
申请日：2019-01-07
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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公开(公告)号：US20180367750A1
公开(公告)日：2018-12-20
申请号：US16111710
申请日：2018-08-24
Inventor： Kengo TERADA , Masayuki KOZUKA , Takahiro NISHI , Tadamasa TOMA
IPC: H04N5/57 , G09G5/10 , H04N9/87 , H04N5/76 , H04N9/79 , H04N7/015 , G06F3/14 , H04N7/01 , H04N5/20
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：US20180160155A1
公开(公告)日：2018-06-07
申请号：US15883558
申请日：2018-01-30
Inventor： Noritaka IGUCHI , Tadamasa TOMA
IPC: H04N21/236 , H04L29/06 , H04N21/44 , H04N21/2343
CPC classification number: H04N21/23605 , H04L65/607 , H04L65/80 , H04N21/2343 , H04N21/23805 , H04N21/2385 , H04N21/438 , H04N21/44004 , H04N21/8451 , H04N21/85406
Abstract: A transmitting method includes: inputting, per unit time, a plurality of transfer packets less than or equal to a predetermined number; and transmitting, per the unit time, the plurality of transfer packets that have been input, in a state where definitions compliant with a receiving buffer model are satisfied. Each of the plurality of transfer packets includes a variable-length packet header and a variable-length payload. The definitions compliant with the receiving buffer model are predetermined for guaranteeing a buffering operation of a receiving device, and specify converting a first packet into a second packet and outputting the second packet from a buffer of the receiving device at a predetermined extraction rate. The first packet is included in the transfer packets received and includes a variable-length packet header and a variable-length payload. The second packet has a fixed-length packet header that is extended.
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公开(公告)号：US20170311034A1
公开(公告)日：2017-10-26
申请号：US15616447
申请日：2017-06-07
Inventor： Takahiro NISHI , Tadamasa TOMA
IPC: H04N21/4402 , H04N21/2343 , H04N7/01
CPC classification number: H04N21/4402 , G06F3/14 , G06T5/009 , G06T2207/20208 , G09G5/003 , G09G5/10 , G09G2320/0271 , G09G2320/0613 , G09G2320/0686 , G09G2340/12 , G09G2370/04 , G09G2370/20 , H04N7/0125 , H04N21/2343 , H04N21/235 , H04N21/4316 , H04N21/4318 , H04N21/435
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：US20170272719A1
公开(公告)日：2017-09-21
申请号：US15610991
申请日：2017-06-01
Inventor： Masayuki KOZUKA , Takahiro NISHI , Kengo TERADA , Tadamasa TOMA
IPC: H04N9/64 , G09G5/10 , H04N21/431 , H04N9/87 , H04N21/234 , H04N5/202 , G06T5/00 , H04N21/435 , H04N21/45 , G11B27/00 , G09G5/00 , H04N11/24
CPC classification number: H04N9/646 , G06T5/007 , G09G5/00 , G09G5/10 , G09G2320/0673 , G09G2340/06 , G11B27/00 , H04N5/202 , H04N9/87 , H04N11/002 , H04N21/234 , H04N21/431 , H04N21/4318 , H04N21/435 , H04N21/43635 , H04N21/4402 , H04N21/4516
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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19.发明申请公开(公告)号：US20170264859A1
公开(公告)日：2017-09-14
申请号：US15611168
申请日：2017-06-01
Inventor： Virginie DRUGEON , Takahiro NISHI , Tadamasa TOMA
IPC: H04N7/01 , H04N21/236 , H04N21/2343
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：US20170251168A1
公开(公告)日：2017-08-31
申请号：US15595043
申请日：2017-05-15
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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