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An Adaptive Constant Illumination Method for High Dynamic Range and Wide Color Gamut Video Decoding

A technology of illumination and range, applied in the field of video coding and video decoding

Active Publication Date: 2019-08-23
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Spatial or temporal prediction leads to a predictive block of the block to be decoded

Method used

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  • An Adaptive Constant Illumination Method for High Dynamic Range and Wide Color Gamut Video Decoding
  • An Adaptive Constant Illumination Method for High Dynamic Range and Wide Color Gamut Video Decoding
  • An Adaptive Constant Illumination Method for High Dynamic Range and Wide Color Gamut Video Decoding

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Experimental program
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Embodiment Construction

[0024] The present invention relates to the coding of video signals with high dynamic range (HDR) and wide color gamut (WCG) representations. Rather, the techniques of this disclosure include signaling and manipulation applied to video data in certain color spaces to enable more efficient compression of HDR and WCG video data. The proposed techniques may improve the compression efficiency of hybrid video coding systems, such as HEVC-based video coders, for coding HDR and WCG video data.

[0025] For example, constant illuminance (CL) is a form of color transformation that transforms color data from RGB color space data to Y'CbCr color space. However, existing forms of CL may not be well suited for HDR and WCG video. As described below, the techniques of this disclosure address this issue. For example, the source and destination devices may apply scaling factors during application of the CL transform. Such scaling factors may be adapted based on specific dynamic range, color...

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Abstract

The device may determine an illumination sample (Y) for a pixel, a Cb sample for the pixel, and a Cr sample for the pixel based on data in the bitstream. Furthermore, the device may obtain a first scaling factor and a second scaling factor from the bitstream. Additionally, the device may determine a converted B sample (B) for the pixel based on the first scaling factor, the Cb sample, and Y for the pixel. The device may determine a converted R sample (R) of the pixel based on the second scaling factor, the Cr sample and Y of the pixel. The device may apply an electro-optic transfer function, EOTF, to convert Y, R, and B into an illumination sample for the pixel, an R sample for the pixel, and a B sample for the pixel, respectively.

Description

[0001] This application claims the benefit of US Provisional Patent Application Serial No. 62 / 172,554, filed June 8, 2015, which is hereby incorporated by reference in its entirety. technical field [0002] The present invention relates to video encoding and video decoding. Background technique [0003] Digital video capabilities can be incorporated into a wide range of devices, including digital television, digital broadcast systems, wireless broadcast systems, personal digital assistants (PDAs), laptop or desktop computers, tablet computers, e-book readers, digital cameras, digital Recording devices, digital media players, video game devices, video game consoles, cellular or satellite radiotelephones, so called "smart phones", video teleconferencing devices, video streaming devices and the like. Digital video devices implement video coding techniques such as MPEG-2, MPEG-4, ITU-T H.263, ITU-T H.264 / MPEG-4, Advanced Video Coding (AVC) Part 10, ITU-T Those techniques descri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N1/64H04N5/20H04N9/68H04N19/46H04N19/12H04N19/186
CPCH04N19/12H04N19/186H04N19/46H04N1/64H04N5/20H04N9/68H04N19/132H04N19/136H04N19/176H04N19/182H04N19/187
Inventor 霍埃尔·索赖·罗哈斯李圣远德米特罗·鲁萨诺夫斯基阿达许·克里许纳·瑞玛苏布雷蒙尼安德内·布达伊哲·桑斯利马尔塔·卡切维奇
Owner QUALCOMM INC