Linear Sub-band Decomposition-based Pre-processing for Perceptual Video Coding
Kwang‐Yeon Choi, Byung Cheol Song · IEIE Transactions on Smart Processing and Computing · 2016
This paper proposes a pre-processing algorithm to improve the coding efficiency of perceptual video coding. First, an input image is decomposed into multiple sub-bands through linear sub-band decomposition. Then, the sub-bands that have low visual sensitivity are suppressed by assigning small gains to them. Experimental results show that if the proposed algorithm is adopted for pre-processing in a High Efficiency Video Coding (HEVC) encoder, it can provide significant bit-saving effects of approximately 12% in low delay mode and 9.4% in random access mode.