Adaptive precision motion estimation for HEVC coding | IEEE Conference Publication | IEEE Xplore

Adaptive precision motion estimation for HEVC coding


Abstract:

Most video coding standards, including the state-of-the-art High Efficiency Video Coding (HEVC), make use of sub-pixel Motion Estimation (ME) with Motion Vectors (MV) at ...Show More

Abstract:

Most video coding standards, including the state-of-the-art High Efficiency Video Coding (HEVC), make use of sub-pixel Motion Estimation (ME) with Motion Vectors (MV) at fractional precisions to achieve high compression ratios. Unfortunately, sub-pixel ME comes at very high computational costs due to the interpolation step and additional motion searches. In this paper, a fast sub-pixel ME algorithm is proposed. The MV precision is adaptively selected on each block to skip the half or quarter precision steps when not needed. The algorithm bases the decision on local features, such as the behaviour of the residual error samples, and global features, such as the amount of edges in the pictures. Experimental results show that the method reduces total encoding time by up to 17.6% compared to conventional HEVC, at modest efficiency losses.
Date of Conference: 31 May 2015 - 03 June 2015
Date Added to IEEE Xplore: 30 July 2015
Electronic ISBN:978-1-4799-7783-3
Conference Location: Cairns, QLD, Australia

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