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Entropy 2014, 16(12), 6667-6685; doi:10.3390/e16126667

Fast Rate Estimation for RDO Mode Decision in HEVC

1
Tomsk Polytechnic University, 634050, Lenin Avenue, 30, Tomsk, Russia
2
Tomsk State University, 634050, Lenin Avenue, 36, Tomsk, Russia
3
Tomsk State University of Control Systems and Radioelectronics, 634050, Lenin Avenue, 40, Tomsk, Russia
*
Author to whom correspondence should be addressed.
Received: 19 August 2014 / Revised: 3 December 2014 / Accepted: 17 December 2014 / Published: 19 December 2014
(This article belongs to the Section Information Theory)
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Abstract

The latter-day H.265/HEVC video compression standard is able to provide two-times higher compression efficiency compared to the current industrial standard, H.264/AVC. However, coding complexity also increased. The main bottleneck of the compression process is the rate-distortion optimization (RDO) stage, as it involves numerous sequential syntax-based binary arithmetic coding (SBAC) loops. In this paper, we present an entropy-based RDO estimation technique for H.265/HEVC compression, instead of the common approach based on the SBAC. Our RDO implementation reduces RDO complexity, providing an average bit rate overhead of 1.54%. At the same time, elimination of the SBAC from the RDO estimation reduces block interdependencies, thus providing an opportunity for the development of the compression system with parallel processing of multiple blocks of a video frame. View Full-Text
Keywords: H.265/HEVC; RDO; SBAC; arithmetic coding; entropy rate estimation H.265/HEVC; RDO; SBAC; arithmetic coding; entropy rate estimation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Sharabayko, M.P.; Ponomarev, O.G. Fast Rate Estimation for RDO Mode Decision in HEVC. Entropy 2014, 16, 6667-6685.

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