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公开(公告)号：US11076150B2
公开(公告)日：2021-07-27
申请号：US16733774
申请日：2020-01-03
Inventor： Masato Ohkawa , Hideo Saitou , Tadamasa Toma , Takahiro Nishi , Kiyofumi Abe , Ryuichi Kanoh
IPC: H04N19/11 , H04N19/159 , H04N19/625 , H04N19/61 , H04N19/176
Abstract: An encoder that encodes a current block in a picture includes circuitry and memory. Using the memory, the circuitry: determines whether to use intra prediction for the current block; and when determining to use intra prediction, (i) performs a first transform on a residual signal of the current block using a first transform basis to generate first transform coefficients; and (ii-1) performs a second transform on the first transform coefficients using a second transform basis to generate second transform coefficients and quantizes the second transform coefficients, when an intra prediction mode of the current block is a predetermined mode or when the first transform basis is same as a predetermined transform basis; and (ii-2) quantizes the first transform coefficients without performing the second transform when the intra prediction mode is different from the predetermined mode and the first transform basis is different from the predetermined transform basis.
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公开(公告)号：US11070828B2
公开(公告)日：2021-07-20
申请号：US14943060
申请日：2015-11-17
Inventor： Tadamasa Toma , Noritaka Iguchi , Takahiro Nishi , Hisaya Katou
IPC: H04N19/423 , H04N21/438 , H04N21/44 , H04N21/63 , H04N19/44
Abstract: A method for decoding data of the present disclosure includes: a receiving step of receiving a plurality of encoded streams on a packet basis, the encoded streams being included in encoded data and having been transmitted using a plurality of respective transmission channels; a storing step of storing a plurality of packets of the received plurality of encoded streams, in a first buffer; a rearranging step of rearranging the plurality of packets stored in the first buffer, in a decoding order; and a decoding step of decoding the plurality of packets rearranged in the decoding order.
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公开(公告)号：US20210051323A1
公开(公告)日：2021-02-18
申请号：US17087128
申请日：2020-11-02
Inventor： Tadamasa Toma , Takahiro Nishi , Kiyofumi Abe , Ryuichi Kanoh , Chong Soon Lim , Sughosh Pavan Shashidhar , Ru Ling Liao , Hai Wei Sun , Han Boon Teo , Jing Ya Li
IPC: H04N19/119 , H04N19/176 , H04N19/157
Abstract: An encoder partitions into blocks using a set of block partition modes. The set of block partition modes includes a first partition mode for partitioning a first block, and a second block partition mode for partitioning a second block which is one of blocks obtained after the first block is partitioned. When the number of partitions of the first block partition mode is three, the second block is a center block among the blocks obtained after partitioning the first block, and the partition direction of the second block partition mode is same as the partition direction of the first block partition mode, the second block partition mode indicates that the number of partitions is only three. A parameter for identifying the second block partition mode includes a first flag indicating a horizontal or vertical partition direction, and does not include a second flag indicating the number of partitions.
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公开(公告)号：US10902881B2
公开(公告)日：2021-01-26
申请号：US15471032
申请日：2017-03-28
Inventor： Hiroshi Yahata , Tadamasa Toma
Abstract: Recorded in a recording medium are a video stream of standard-luminance range, and a video stream of high-luminance range that is a broader luminance range than the standard-luminance range, which are used selectively in accordance with a playback environment, a subtitle stream of the standard-luminance range, and a subtitle stream of the high-luminance range, which are used selectively in accordance with the playback environment, and a playlist file storing playback control information of content, playlist file including a management region where the playback control information relating to a main stream is stored, and an extended region. The management region stores first playback control information specifying playing of a video stream of the high-luminance range and a subtitle stream of the high-luminance range in combination. The extended region stores second playback control information specifying playing of a video stream of the standard-luminance range and a subtitle stream of the standard-luminance range in combination.
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公开(公告)号：US10856005B2
公开(公告)日：2020-12-01
申请号：US16816733
申请日：2020-03-12
Inventor： Takashi Hashimoto , Kiyofumi Abe , Tadamasa Toma , Takahiro Nishi , Ryuichi Kanoh
IPC: H04N19/52 , H04N19/159 , H04N19/182
Abstract: An encoder includes: circuitry; and memory, in which using the memory, the circuitry, in affine motion compensation prediction in inter prediction for a current block, places a limit on a range within which motion estimation or motion compensation is performed, and performs the motion compensation for the current block.
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Patent Agency Ranking
公开(公告)号：US10827208B2
公开(公告)日：2020-11-03
申请号：US15177482
申请日：2016-06-09
Inventor： Noritaka Iguchi , Tadamasa Toma , Hisaya Katou
IPC: H04N21/236 , H04N21/434 , H04N19/169 , H04N21/854 , G10L19/16 , H04N19/436 , H04N19/70 , H04N5/38 , H04N5/44
Abstract: A transmitting method according to one aspect of the present disclosure includes: encoding a video signal and generating encoded data including a plurality of access units; storing the plurality of access units in a packet in a unit that defines one access unit as one unit or in a unit defined by dividing one access unit, and generating a packet group; transmitting the generated packet group as data; generating first information and second information, the first information indicating a presentation time of a first access unit that is presented first among the plurality of access units, and the second information being used to calculate a decoding time of the plurality of access units; and transmitting the first information and the second information as control information.
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公开(公告)号：US10810786B2
公开(公告)日：2020-10-20
申请号：US16243764
申请日：2019-01-09
Inventor： Toru Matsunobu , Takahiro Nishi , Tadamasa Toma , Toshiyasu Sugio , Satoshi Yoshikawa , Tatsuya Koyama
Abstract: A three-dimensional data creation method includes: creating first three-dimensional data from information detected by a sensor; receiving encoded three-dimensional data that is obtained by encoding second three-dimensional data; decoding the received encoded three-dimensional data to obtain the second three-dimensional data; and merging the first three-dimensional data with the second three-dimensional data to create third three-dimensional data.
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公开(公告)号：US10679664B2
公开(公告)日：2020-06-09
申请号：US15699105
申请日：2017-09-08
Inventor： Hiroshi Yahata , Tadamasa Toma
Abstract: A recording medium includes a video stream of a standard-luminance range and a video stream of high-luminance range, which are used selectively in accordance with a playback environment. The recording medium also includes a subtitle stream of the standard-luminance range and a subtitle stream of the high-luminance range, which are used selectively in accordance with the playback environment. A playlist file includes a management region where playback control information relating to a main stream is stored, and includes an extended region. The management region stores first playback control information specifying playing of the video stream of the high-luminance range and the subtitle stream of the high-luminance range in combination. The extended region stores second playback control information specifying playing of the video stream of the standard-luminance range and the subtitle stream of the standard-luminance range in combination.
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公开(公告)号：US20190373236A1
公开(公告)日：2019-12-05
申请号：US16539484
申请日：2019-08-13
Inventor： Hiroshi Yahata , Tadamasa Toma
IPC: H04N9/87 , H04N9/804 , H04N5/85 , G11B27/34 , G11B27/32 , G11B20/12 , G11B20/10 , H04N9/82 , H04N21/488 , H04N21/44 , H04N21/432 , H04N21/426 , G11B27/30 , G11B27/28
Abstract: A play back device includes a readout unit and a playback unit. The readout unit reads out an encoded main video stream and an encoded sub-video stream that are recorded in a recording medium. The sub-video stream is a sub-video that is to be superimposed on the main video and displayed. The playback unit plays the main video stream and the sub-video stream that have been read out. The sub-video stream includes multiple sets, each set including a first sub-video stream for a first luminance dynamic range and a second sub-video stream for a second luminance dynamic range, which is wider than the first luminance dynamic range. In the same set in the multiple sets, a registration order of the first sub-video stream in the first database and a registration order of the second sub-video stream in the second database are the same.
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公开(公告)号：US10482923B2
公开(公告)日：2019-11-19
申请号：US15683053
申请日：2017-08-22
Inventor： Hiroshi Yahata , Tadamasa Toma
IPC: H04N5/92 , H04N5/84 , G11B27/28 , G11B20/10 , G11B27/10 , G11B27/32 , H04N5/85 , H04N7/015 , H04N9/804 , H04N9/82 , H04N9/80 , G11B27/00 , H04N5/93
Abstract: At least one video stream that is encoded video information, and a management information file indicating attributes relating to the entire recording medium, are recorded in a recording medium. The management information file includes attribute information indicating whether the dynamic range of luminance of an initial video stream, which is played first out of the at least one video stream when the recording medium is inserted into a playback device, is a first dynamic range, or a second dynamic range that is broader than the first dynamic range.
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