Computational complexity reduction in HEVC intra prediction using dual tree complex wavelet transform and holoentropy

Abstract

High efficiency video coding (HEVC) is the newest video codec to increases the coding efficiency of its ancestor H.264/Advance Video Coding at the cost of highly increased computational complexity. In this paper, a novel method using Dual tree Complex Wavelet Transform is proposed to reduce the computational time consumption in HEVC Encoding. DTCWT provides better directional selectivity. By using DTCWT, total intra prediction modes are reduced from 35 modes to 7 modes including DC and Planer mode. The encoding process in HEVC system is performed using clustered entropy computing, which distinguishes the video information has useful outliers. The pixel variations under varying frames are clustered based on the interestingness and the outliers are removed using an advanced entropy principle called as holoentropy. Compared to the current state of the art algorithms, the experimental results show that this scheme is computationally simple and achieves superior reconstructed video quality at less computational complexity.