Fast mode decision in fine granularity scalability motion refinement

10 September 2007 Fast mode decision in fine granularity scalability motion refinement

Y. H. Tan, Z. G. Li, S. Rahardja

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Proceedings Volume 6777, Multimedia Systems and Applications X; 67770K (2007) https://doi.org/10.1117/12.733515
Event: Optics East, 2007, Boston, MA, United States

Abstract

In this paper, we describe a fine granularity scalable (FGS) video coding scheme that refines both residue and motion information in the quality layers. Significant gains can be achieved when each enhancement layer undergoes the motion compensation, prediction process with its own motion vector field (MVF). However, a motion refined FGS scheme involves a motion estimation process for each enhancement layer of the scalable video. Given the high computational cost of motion estimation in H.264, encoders can be computational expensive to implement. Our proposed scheme carries out a simplified motion refinement scheme for enhancement layers, exploiting the correlation of motion information between successive layers through macroblock (MB) type refinement. By restricting the MB type of FGS layer MB according to the MB type of base layer MB, time required for encoding FGS layers can be reduced. Through controlling the macroblock modes of macroblock in both the base and the enhancement layers, the encoding time can be substantially reduced with minimal impact on coding efficiency. The encoder optimization scheme we describe is especially effective when encoding a video with a low bitrate base layer and a large range of extractable bitrates.

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Y. H. Tan, Z. G. Li, and S. Rahardja "Fast mode decision in fine granularity scalability motion refinement", Proc. SPIE 6777, Multimedia Systems and Applications X, 67770K (10 September 2007); https://doi.org/10.1117/12.733515

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KEYWORDS

Computer programming

Video coding

Video

Scalable video coding

Motion estimation

Distortion

Signal to noise ratio

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