Publication

Abstract : This paper presents a comparative analysis of some major High Efficiency Video Coding (HEVC) intra prediction mode decision methods reported in the literature. Intra coding in HEVC is based on spatial sample prediction and can be described as a collection of many elements including quad tree partitioning, 35 intra prediction modes, reference sample smoothing, boundary sample filtering process, intra mode coding and so on. Each of these elements results in an improved coding efficiency in HEVC intra coding. In this review, we provide an extensive and up-to-date discussion of the research proposals regarding a variety of HEVC intra prediction mode decision strategies. Moreover, some most significant research contributions on fast intra mode decision methods in HEVC to improvise the encoder efficiency are reviewed in detail along with a comparative performance analysis of the reviewed proposals in terms of some standard evaluation metrics such as bit rate, PSNR and time savings. In addition, this paper point out some research directions towards further developments in the intra prediction for the betterment of the encoder efficacy.