- 专利标题: VIDEO DISPLAY APPARATUS AND VIDEO DISPLAY METHOD
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申请号: US16332738申请日: 2018-02-26
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公开(公告)号: US20190387134A1公开(公告)日: 2019-12-19
- 发明人: Masayuki KOZUKA , Masaya YAMAMOTO , Yoshiichiro KASHIWAGI , Toshiroh NISHIO , Kazuhiko KOUNO , Hiroshi YAHATA , Takeshi HIROTA , Yoshihiro MORI
- 申请人: Masayuki KOZUKA , Masaya YAMAMOTO , Yoshiichiro KASHIWAGI , Toshiroh NISHIO , Kazuhiko KOUNO , Hiroshi YAHATA , Takeshi HIROTA , Yoshihiro MORI
- 申请人地址: JP Osaka
- 专利权人: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
- 当前专利权人: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
- 当前专利权人地址: JP Osaka
- 国际申请: PCT/JP2018/006861 WO 20180226
- 主分类号: H04N5/20
- IPC分类号: H04N5/20 ; H04N5/445
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-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.
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