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http://dx.doi.org/10.5573/ieie.2017.54.1.080

Linear Sub-band Decomposition based Pre-processing Algorithm for Perceptual Video Coding  

Choi, Kwang Yeon (Department of Electronic Engineering, Inha University)
Song, Byung Cheol (Department of Electronic Engineering, Inha University)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.54, no.1, 2017 , pp. 80-87 More about this Journal
Abstract
This paper proposes a pre-processing algorithm to improve perceptual video coding efficiency which decomposes an input frame via a sub-band decomposition, and suppresses only high frequency band(s) having low visual sensitivity. First, we decompose the input frame into several frequency subbands by a linear sub-band decomposition. Next, high frequency subband(s) which is rarely recognized by human visual system (HVS) is suppressed by applying relatively small gain(s). Finally, the high frequency suppressed frame is compressed by a specific video encoder. We can find from the experimental results that if comparing before-use and after-use of the proposed pre-processing prior to the encoder, no visual difference is shown. Also, the proposed algorithm achieves bit-saving of 13.12% on average in a H.264 video encoder.
Keywords
Perceptual video coding; visual sensitivity; CODEC; sub-band decomposition;
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