In the HEVC/H.265 video coding standard, weighting quantization matrices (WQMs) are supported to take advantage of the characteristics of the human visual system (HVS). However, the default WQMs utilized in… Click to show full abstract
In the HEVC/H.265 video coding standard, weighting quantization matrices (WQMs) are supported to take advantage of the characteristics of the human visual system (HVS). However, the default WQMs utilized in HEVC are developed for YCbCr videos instead of RGB videos. In this paper, a set of new WQMs is proposed for video coding in RGB color space. First, we utilize the spatial contrast sensitivity function (CSF) to model the bandpass property of HVS. To derive the parameters of the spatial CSF, a series of subjective experiments is conducted to obtain the just-noticeable distortion (JND) thresholds of several selected DCT subbands. In addition, the sensitivities of different DCT subbands in one color channel, as well as among R, G, and B channels, are considered to design the WQMs of intra-coded
               
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