| Summary: | 碩士 === 國立高雄第一科技大學 === 電腦與通訊工程系碩士班 === 106 === To obtain the best partition of coding tree unit (CTU) structure with the lowest
rate-distortion (RD) cost in the HEVC video compression standard, the computational
complexity is very high for the computation of RD costs of all prediction modes and
the comparison among these RD cost needed by each coding unit (CU). Therefore, in
this paper an algorithm is proposed to reduce the computational complexity of HEVC
coding using early skipping larger-sized coding unit, human visual saliency patterns
instead of the RD cost, Gradient information statistics 33 intra-angular prediction
modes, and the coding block size enlarged to be suitable for the 4K ultra
high-definition (UHD) video coding, so as to reduce the computational complexity
and save the coding time.
The experimental results show that the proposed algorithm can save 47.68% of
total encoding time on average and reduce 2.43% of bit rate on average compared to
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the original mode decision in the HEVC reference software HM16.9, with the penalty
of 0.163dB of the quality loss of reconstructed video on average.
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