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公开(公告)号：US20220277771A1
公开(公告)日：2022-09-01
申请号：US17745025
申请日：2022-05-16
Inventor： Hiroshi YAHATA , Tadamasa TOMA
Abstract: A playback device acquires first management information that stores first playback control information and second management information that stores second playback control information. The first playback control information specifies that a video stream of a high-luminance range is to be played, and the second playback control information specifies that a video stream of a standard-luminance range is to be played. A video player acquires and plays the video stream of the high-luminance range based on the first playback control information in a case of playing the content as the high-luminance range. The video player acquires and plays the video stream of the standard-luminance range based on the second playback control information in a case of playing the content as the standard-luminance range.
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公开(公告)号：US20210012812A1
公开(公告)日：2021-01-14
申请号：US17038753
申请日：2020-09-30
Inventor： Hiroshi YAHATA , Tadamasa TOMA , Tomoki OGAWA
IPC: G11B27/28 , G11B20/10 , H04N5/84 , H04N9/804 , H04N9/82 , G11B27/10 , G11B27/32 , H04N5/85 , H04N7/015
Abstract: A decoding system decodes a video stream, which is encoded video information. The decoding system includes an attribute information acquirer that acquires first attribute information, indicating whether a dynamic range of luminance of the video stream is a first dynamic range or a second dynamic range that is wider than the first dynamic range, and a decoder that acquires the video steam and generates decoded video information. The decoding system also includes an outputter that, in a case where the first attribute information indicates the second dynamic range, outputs the decoded video information and maximum luminance information indicating a maximum luminance of the video stream in accordance with the second dynamic range. Further, in other cases, the outputter outputs the decoded video information and maximum luminance information indicating the maximum luminance of all pictures in the video stream.
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公开(公告)号：US20190013048A1
公开(公告)日：2019-01-10
申请号：US16127507
申请日：2018-09-11
Inventor： Hiroshi YAHATA , Kazuhiro MOCHINAGA
Abstract: A playback method of reading out and playing streams from a recording medium is provided, in which are recorded a stream file including a first luminance video expressed by luminance of a first dynamic range, and a second luminance video expressed by luminance of a second dynamic range that is broader than the first dynamic range, and a playlist file for controlling playback of the stream file. The playback method includes, in a case of playing the first luminance video, reading out the first audio streams listed in the first combination information of the playlist file, and playing at the same time with the first luminance video, and in a case of playing the second luminance video, reading out the second audio streams listed in the second combination information of the playlist file, and playing at the same time with the second luminance video.
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公开(公告)号：US20170366794A1
公开(公告)日：2017-12-21
申请号：US15690437
申请日：2017-08-30
Inventor： Hiroshi YAHATA , Tadamasa TOMA
IPC: H04N9/87 , G11B20/10 , H04N21/432 , H04N21/426 , H04N9/82 , G11B20/12 , H04N5/85 , H04N21/44 , G11B27/34 , G11B27/32 , G11B27/30 , G11B27/28 , H04N21/488 , H04N9/804
CPC classification number: H04N9/87 , G11B20/10 , G11B20/1262 , G11B27/28 , G11B27/3027 , G11B27/309 , G11B27/322 , G11B27/329 , G11B27/34 , G11B2220/2562 , H04N5/85 , H04N9/8042 , H04N9/8233 , H04N21/42646 , H04N21/4325 , H04N21/44008 , H04N21/4884
Abstract: A recording medium according an aspect of the present disclosure has recorded therein a main video stream where a main video has been encoded, and a sub-video stream where a sub-video, that is to be superimposed on the main video and displayed, has been encoded. The sub-video stream includes bitmap data indicating a design of the sub-video and palette data specifying the display color of the design. The palette data includes first palette data for a first luminance dynamic range (SDR), and second palette data for a second luminance dynamic range (HDR) that is broader than the first dynamic range.
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公开(公告)号：US20170352383A1
公开(公告)日：2017-12-07
申请号：US15683024
申请日：2017-08-22
Inventor： Hiroshi YAHATA , Tadamasa TOMA
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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Patent Agency Ranking
公开(公告)号：US20170337946A1
公开(公告)日：2017-11-23
申请号：US15673864
申请日：2017-08-10
Inventor： Hiroshi YAHATA
CPC classification number: G11B20/10527 , G11B20/10 , G11B20/1217 , G11B20/1254 , G11B20/1258 , G11B27/105 , G11B2220/2562
Abstract: A playback device is provided that includes a readout unit that reads out data recorded in a recording medium and a playback unit. Data including a digital stream file obtained by encoding video information is recorded in the recording medium. A recording region of the recording medium has a first recording region where reading is performed at a first read rate, and a second recording region where reading is performed at a second read rate that is faster than the first read rate. In a file system, the data is classified into the digital stream file having real-time attributes and a data file having non-real-time attributes, wherein the data file read in during playback of the digital stream file is recorded in the same recording region where the digital stream file being played is recorded. The readout unit reads out the data without changing the first or second read rate.
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公开(公告)号：US20220115044A1
公开(公告)日：2022-04-14
申请号：US17556227
申请日：2021-12-20
Inventor： Hiroshi YAHATA , Tadamasa TOMA , Tomoki OGAWA
IPC: G11B27/28 , G11B20/10 , H04N5/84 , H04N9/804 , H04N9/82 , G11B27/10 , G11B27/32 , H04N5/85 , H04N7/015
Abstract: A decoding system decodes a video stream, which is encoded video information. The decoding system includes a decoder that acquires the video steam and generates decoded video information, a maximum luminance information acquirer that acquires maximum luminance information indicating the maximum luminance of the video stream from the video stream, and an outputter that outputs the decoded video information along with the maximum luminance information. In in a case where the video stream includes a base video stream and an enhanced video stream, the decoder generates base video information by decoding the base video stream, an enhanced video information by decoding the enhanced video stream, and generates the decoded video information based on the base video information and the enhanced video information, and the outputter outputs the decoded video information, along with the maximum luminance information.
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公开(公告)号：US20200143834A1
公开(公告)日：2020-05-07
申请号：US16733754
申请日：2020-01-03
Inventor： Hiroshi YAHATA
IPC: G11B20/00 , H04N21/845 , H04N21/4405 , H04N21/432 , H04N5/913 , H04N5/85
Abstract: A playback method and a playback device for playing a system stream file are provided. The playback method uses the playback device having one or more memories and circuitry to play the system stream file. The playback method includes reading the system stream file and identifying whether the system stream file to be played back is a first system stream file having a first file format or a second system stream file having a second file format. If the system stream file to be played back is the first system stream file, the method further includes converting a file format of the system stream file that has been read out from the first file format into the second file format. The playback method further includes decoding the system stream file having the second file format.
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公开(公告)号：US20180122420A1
公开(公告)日：2018-05-03
申请号：US15813824
申请日：2017-11-15
Inventor： Hiroshi YAHATA
IPC: G11B20/00 , H04N5/913 , H04N21/845 , H04N21/4405 , H04N21/432 , H04N5/85
CPC classification number: G11B20/00246 , G11B20/00181 , G11B20/0042 , G11B20/005 , G11B20/00514 , H04N5/85 , H04N5/913 , H04N21/4325 , H04N21/44055 , H04N21/8456 , H04N2005/91364
Abstract: A memory storing AV data for playing back encrypted video on a playback device is provided. The AV data includes a system stream file including encrypted video information, and a management information file. The system stream file includes a first segment in which is repeated a first data unit that can be individually decrypted using a first decryption key, and has a second data unit of the same data size as the first data unit but cannot be decrypted by the first decryption key. The system stream file also includes a second segment which can all be decrypted using a second decryption key that the playback device has in common with another playback device. The management information file has a time map in which are correlated I-picture serving as random access point, and a presentation clock time of the I-picture. The I-picture is multiplexed in the second segment.
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公开(公告)号：US20170372753A1
公开(公告)日：2017-12-28
申请号：US15698799
申请日：2017-09-08
Inventor： Hiroshi YAHATA , Kazuhiro MOCHINAGA
CPC classification number: G11B27/102 , G11B20/10 , G11B27/105 , G11B27/32 , G11B27/329 , H04N5/85 , H04N9/8045 , H04N9/8211 , H04N9/8233 , H04N9/8715
Abstract: A playback method is provided for reading out and playing streams from a recording medium. Recorded in the recording medium are a stream file including a first luminance video expressed by luminance of a first dynamic range, and a second luminance video expressed by luminance of a second dynamic range that is broader than the first dynamic range; a playlist file for controlling playback of the stream file; and a number of elementary streams. The playback method includes when playing the first luminance video, reading out any one of the elementary streams listed in the first combination information of the playlist file, and playing at the same time with the first luminance video; and when playing the second luminance video, reading out any one of the elementary streams listed in the second combination information of the playlist file, and playing at the same time with the second luminance video.
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