Journal Article10.1049/IET-IPR.2015.0666
Adaptive low-complexity motion estimation algorithm for high efficiency video coding encoder
TL;DR: A fast centre search algorithm (FCSA) and an adaptive search window algorithm (ASWA) for integer pixel ME in HEVC, a combination of the two proposed algorithms FCSA and ASWA, is proposed in order to achieve the best performance.
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Abstract: High quality videos became an essential requirement in recent applications. High efficiency video coding (HEVC) standard provides an efficient solution for high quality videos at lower bit rates. On the other hand, HEVC comes with much higher computational cost. In particular, motion estimation (ME) in HEVC, consumes the largest amount of computations. Therefore, fast ME algorithms and hardware accelerators are proposed in order to speed-up integer ME in HEVC. This study presents a fast centre search algorithm (FCSA) and an adaptive search window algorithm (ASWA) for integer pixel ME in HEVC. In addition, centre adaptive search algorithm, a combination of the two proposed algorithms FCSA and ASWA, is proposed in order to achieve the best performance. Experimental results show notable speed-up in terms of encoding time and bit rate saving with tolerable peak signal-to-noise ratio (PSNR) quality degradation. The proposed fast search algorithms reduce the computational complexity of the HEVC encoder by 57%. This improvement is accompanied with a modest average PSNR loss of 0.014 dB and an increase by 0.6385% in terms of bit rate when compared with related works.
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Citations
Recent Advances on HEVC Inter-Frame Coding: From Optimization to Implementation and Beyond
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Adaptive pattern selection strategy for diamond search algorithm in fast motion estimation
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Efficient AMP decision and search range adjustment algorithm for HEVC
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References
Overview of the H.264/AVC video coding standard
TL;DR: An overview of the technical features of H.264/AVC is provided, profiles and applications for the standard are described, and the history of the standardization process is outlined.
Overview of the High Efficiency Video Coding (HEVC) Standard
TL;DR: The main goal of the HEVC standardization effort is to enable significantly improved compression performance relative to existing standards-in the range of 50% bit-rate reduction for equal perceptual video quality.
Comparison of the Coding Efficiency of Video Coding Standards—Including High Efficiency Video Coding (HEVC)
TL;DR: The results of subjective tests for WVGA and HD sequences indicate that HEVC encoders can achieve equivalent subjective reproduction quality as encoder that conform to H.264/MPEG-4 AVC when using approximately 50% less bit rate on average.
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Hexagon-based search pattern for fast block motion estimation
Ce Zhu,Xiao Lin,Lap-Pui Chau +2 more
TL;DR: Analysis shows that a speed improvement rate of the hexagon-based search (HEXBS) algorithm over the diamond search (DS) algorithm can be over 80% for locating some motion vectors in certain scenarios.
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HEVC Complexity and Implementation Analysis
TL;DR: Overall, the complexity of HEVC decoders does not appear to be significantly different from that of H.264/AVC decoder; this makes HEVC decoding in software very practical on current hardware.