-
公开(公告)号：US10992877B2
公开(公告)日：2021-04-27
申请号：US16333885
申请日：2018-02-26
发明人： Masaya Yamamoto , Masayuki Kozuka , Yoshiichiro Kashiwagi , Toshiroh Nishio , Kazuhiko Kouno , Hiroshi Yahata , Takeshi Hirota , Yoshihiro Mori
IPC分类号： H04N5/235 , H04N5/20 , H04N21/431 , H04N21/435
摘要： A video display apparatus includes: a tone mapping processor that converts, by using dynamic metadata indicating a maximum luminance of a video in each of a plurality of time intervals included in a predetermined period, a luminance of the video in each time interval based on conversion characteristics according to the maximum luminance of the video in the time interval; and a display. The tone mapping processor switches between: a first operation of performing the tone mapping process by using first dynamic metadata that indicates the maximum luminance that is constant over the plurality of time intervals, the first dynamic metadata being generated by using static metadata that indicates a maximum luminance of the video in the predetermined period; and a second operation of performing the tone mapping process by using second dynamic metadata in which the maximum luminance varies over the plurality of time intervals.
-
公开(公告)号：US10742945B2
公开(公告)日：2020-08-11
申请号：US16349931
申请日：2018-02-26
发明人： Takeshi Hirota , Susumu Miyajima , Akira Yoneda , Yoshiichiro Kashiwagi , Toshiroh Nishio , Masayuki Kozuka
摘要： A luminance characteristics generation method includes: determining, for each of frames included in a video, a value as first luminance characteristics, the value being obtained by dividing the number of pixels having luminances less than or equal to a first luminance among all pixels included in the frame by the number of all the pixels included in the frame; and outputting the first luminance characteristics determined in the determining of the value.
-
公开(公告)号：US10659745B2
公开(公告)日：2020-05-19
申请号：US16349923
申请日：2018-02-26
发明人： Takeshi Hirota , Susumu Miyajima , Akira Yoneda , Yoshiichiro Kashiwagi , Toshiroh Nishio , Masayuki Kozuka
摘要： A video display device includes: a video receiver that obtains video data including a video and dynamic luminance characteristics indicating a time-dependent change in luminance characteristics of the video; a tone mapping processor that, in the case where a luminance region having a luminance less than or equal to a first luminance is defined as a low luminance region, and a luminance region having a luminance exceeding the first luminance is defined as a high luminance region, (i) performs first tone mapping using first conversion characteristics when first luminance characteristics exceed a predetermined threshold value, and (ii) performs second tone mapping using second conversion characteristics when the first luminance characteristics are less than or equal to the predetermined threshold value.
-
公开(公告)号：US11228747B2
公开(公告)日：2022-01-18
申请号：US16842250
申请日：2020-04-07
发明人： Takeshi Hirota , Susumu Miyajima , Akira Yoneda , Yoshiichiro Kashiwagi , Toshiroh Nishio , Masayuki Kozuka
摘要： A video display device includes: a video receiver that receives video data including a video and dynamic luminance characteristics indicating a time-dependent change in luminance characteristics of the video; a tone mapping processor that, in the case where a luminance region having a luminance less than or equal to a first luminance is defined as a low luminance region, and a luminance region having a luminance exceeding the first luminance is defined as a high luminance region, (i) performs first tone mapping using first conversion characteristics when first luminance characteristics exceed a predetermined threshold value, and (ii) performs second tone mapping using second conversion characteristics when the first luminance characteristics are less than or equal to the predetermined threshold value.
-
公开(公告)号：US11153466B2
公开(公告)日：2021-10-19
申请号：US16331464
申请日：2018-02-26
发明人： Masaya Yamamoto , Masayuki Kozuka , Yoshiichiro Kashiwagi , Toshiroh Nishio , Kazuhiko Kouno , Hiroshi Yahata , Takeshi Hirota , Yoshihiro Mori
IPC分类号： G06T5/00 , G06T5/20 , H04N9/793 , H04N5/20 , H04N5/445 , H04N21/431 , H04N21/4402 , H04N9/82 , H04N5/66 , H04N21/47
摘要： A video display apparatus includes: a tone mapping processor that performs a tone mapping process of converting a luminance of a video by using conversion characteristics according to a maximum luminance of the video; and a display that displays the video that has undergone the tone mapping process. The tone mapping processor switches between a first tone mapping process of dynamically changing the conversion characteristics according to a time-dependent change in the maximum luminance of the video and a second tone mapping process that is performed using constant conversion characteristics irrespective of the time-dependent change in the maximum luminance of the video.
-
公开(公告)号：US11032448B2
公开(公告)日：2021-06-08
申请号：US16331456
申请日：2018-02-26
发明人： Masaya Yamamoto , Masayuki Kozuka , Yoshiichiro Kashiwagi , Toshiroh Nishio , Kazuhiko Kouno , Hiroshi Yahata , Takeshi Hirota , Yoshihiro Mori
IPC分类号： H04N5/445 , H04N5/20 , H04N21/431 , H04N21/4402 , H04N9/82 , H04N5/66 , H04N21/47 , G06T5/00 , G06T5/20 , H04N9/793
摘要： A video display system includes: a tone mapping processor that performs a tone mapping process of converting a luminance of a video by using conversion characteristics according to a maximum luminance of the video; and a display that displays the video that has undergone the tone mapping process. The tone mapping processor switches between a first tone mapping process of dynamically changing the conversion characteristics according to a time-dependent change in the maximum luminance of the video and a second tone mapping process that is performed using constant conversion characteristics irrespective of the time-dependent change in the maximum luminance of the video.
-
公开(公告)号：US11146737B2
公开(公告)日：2021-10-12
申请号：US16333894
申请日：2018-02-26
发明人： Masaya Yamamoto , Masayuki Kozuka , Yoshiichiro Kashiwagi , Toshiroh Nishio , Kazuhiko Kouno , Hiroshi Yahata , Takeshi Hirota , Yoshihiro Mori
IPC分类号： H04N5/235 , H04N5/20 , H04N21/431 , H04N21/435
摘要： A video display system includes: a tone mapping processor; a display; and a metadata processor that generates first dynamic metadata that indicates a maximum luminance that is constant over a plurality of time intervals by using static metadata. The video display system switches between: a first operation of (i) generating the first dynamic metadata by using the static metadata, performed by the metadata processor and (ii) performing the tone mapping process by using the first dynamic metadata, performed by the tone mapping processor; and a second operation of performing the tone mapping process by using second dynamic metadata in which the maximum luminance varies over the plurality of time intervals, performed by the tone mapping processor.
-
公开(公告)号：US11049225B2
公开(公告)日：2021-06-29
申请号：US16333507
申请日：2018-02-26
发明人： Masayuki Kozuka , Masaya Yamamoto , Toshiroh Nishio , Kazuhiko Kouno , Yoshiichiro Kashiwagi , Takeshi Hirota , Hiroshi Yahata , Yoshihiro Mori
IPC分类号： G09G5/10 , G09G5/397 , H04N19/186 , G06T5/00 , G06T11/60 , G06T5/50 , G09G5/00 , G09G5/02 , H04N5/66 , H04N5/20 , H04N21/431 , G06T11/00
摘要： A video processing system includes: an acquirer that acquires video data including a main video; a format acquirer that acquires a display format that indicates a luminance dynamic range format displayable by a video display apparatus; a generator that generates first characteristics information that indicates first dynamic luminance characteristics that correspond to the display format by using the video data when a luminance dynamic range format of the main video indicated by the video data is different from the display format, the first dynamic luminance characteristics being dynamic luminance characteristics indicating a time-dependent change in luminance characteristics of the main video; and a video transmitter that outputs the first characteristics information generated by the generator.
-
公开(公告)号：US11039045B2
公开(公告)日：2021-06-15
申请号：US16332751
申请日：2018-02-26
发明人： Masayuki Kozuka , Masaya Yamamoto , Yoshiichiro Kashiwagi , Toshiroh Nishio , Kazuhiko Kouno , Hiroshi Yahata , Takeshi Hirota , Yoshihiro Mori
摘要： A video display system includes: a tone mapping processor that performs a tone mapping process of converting a luminance of a video by using conversion characteristics according to a maximum luminance of the video; and a display that displays the video that has undergone the tone mapping process. The tone mapping processor switches between a first tone mapping process of dynamically changing the conversion characteristics according to a time-depend change in the maximum luminance of the video and a second tone mapping process that is performed using constant conversion characteristics irrespective of the time-depend change in the maximum luminance of the video. When the tone mapping process used is switched from the second tone mapping process to the first tone mapping process, the conversion characteristics used is changed gradually or stepwise from the constant conversion characteristics to dynamically changing conversion characteristics over a plurality of frames.
-
公开(公告)号：US10984510B2
公开(公告)日：2021-04-20
申请号：US16333491
申请日：2018-02-26
发明人： Masayuki Kozuka , Masaya Yamamoto , Toshiroh Nishio , Kazuhiko Kouno , Yoshiichiro Kashiwagi , Takeshi Hirota , Hiroshi Yahata , Yoshihiro Mori
IPC分类号： G06T5/00 , G06T11/60 , G06T5/50 , G09G5/00 , G09G5/02 , G09G5/10 , G09G5/397 , H04N5/66 , H04N5/20 , H04N21/431 , G06T11/00
摘要： A video display apparatus includes: a video receiver that acquires video data including a main video; a generator that generates first characteristics information that indicates first dynamic luminance characteristics by using the video data when a luminance dynamic range format of the main video indicated by the video data is different from a display format that indicates a luminance dynamic range format displayable by the video display apparatus, the first dynamic luminance characteristics being dynamic luminance characteristics indicating a time-dependent change in luminance characteristics of the main video and correspond to the display format; a tone mapping processor that performs a tone mapping process of converting a luminance of the main video based on conversion characteristics according to the first dynamic luminance characteristics indicated by the first characteristics information generated by the generator; and a display that displays the main video that has undergone the tone mapping process.
-
-
-
-
-
-
-
-
-
搜索结果
10 条记录 (耗时 0.018 秒)
