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公开(公告)号:US10080026B2
公开(公告)日:2018-09-18
申请号:US15546792
申请日:2016-03-17
IPC分类号: H04N7/12 , H04N19/169 , H04N19/70 , H04N19/192 , H04N19/179
CPC分类号: H04N19/1887 , H04N19/179 , H04N19/192 , H04N19/30 , H04N19/70 , H04N21/47205 , H04N21/478
摘要: Statistical values are computed based on received source images. An adaptive reshaping function is selected for one or more source images based on the one or more statistical values. A portion of source video content is adaptively reshaped, based on the selected adaptive reshaping function to generate a portion of reshaped video content. The portion of source video content is represented by the one or more source images. An approximation of an inverse of the selected adaptive reshaping function is generated. The reshaped video content and a set of adaptive reshaping parameters defining the approximation of the inverse of the selected adaptive reshaping function are encoded into a reshaped video signal. The reshaped video signal may be processed by a downstream recipient device to generate a version of reconstructed source images, for example, for rendering with a display device.
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公开(公告)号:US09936199B2
公开(公告)日:2018-04-03
申请号:US15513928
申请日:2015-09-24
发明人: Jan Froehlich , Robin Atkins , Qiuwei Wang , Guan-Ming Su , Peng Yin
IPC分类号: H04N19/186 , H04N19/124 , H04N9/67
CPC分类号: H04N19/124 , H04N9/67 , H04N9/68 , H04N19/186 , H04N19/60 , H04N19/85
摘要: Compared to traditional gamma-coded video, perceptually quantized video provides greater flexibility for the transmission and display management of high-dynamic range video, but it does not compresses as efficiently using existing standard codecs. Techniques are described to improve the coding efficiency of perceptually coded video by applying a color cross-talk transformation after the RGB/XYZ to LMS transformation. Such a transform increases luma and chroma correlation for color appearance models, but improves perceptual uniformity and overall coding efficiency for wide color gamut, HDR, signals.
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