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Parallel palette mode decoding for HEVC SCC | IEEE Conference Publication | IEEE Xplore

Parallel palette mode decoding for HEVC SCC


Abstract:

Palette mode is one of the major coding tools for the Screen Content Coding (SCC) extension to HEVC standard. On the other hand, as the parallel computing capability expl...Show More

Abstract:

Palette mode is one of the major coding tools for the Screen Content Coding (SCC) extension to HEVC standard. On the other hand, as the parallel computing capability explosively grows in recent computing industry, people are exploring the possibility of parallelism as much as possible, to achieve video codec products with higher speed and larger throughput. However, the newly introduced palette technology poses great challenges to the implementations of SCC decoder. Under the current palette framework, the pixel reconstructing process has to wait until all the palette indices are parsed, and cannot be operated in parallel due to the syntax dependencies. This paper intends to investigate an efficient parallel decoding architecture for the emerging palette mode to tackle these conundrums. Each largest 32 × 32 coding unit (CU) using palette mode is split into multiple sub-CUs and coded independently. We did integrated investigation to illustrate the trade-off between parallelism and coding efficiency, as an important guidance for SCC codec parallel implementation. We tested the scenario to split the CU into 8 sub-CUs, which can achieve 320% speed acceleration with negligible loss in RD performance.
Date of Conference: 22-25 May 2016
Date Added to IEEE Xplore: 11 August 2016
ISBN Information:
Electronic ISSN: 2379-447X
Conference Location: Montreal, QC, Canada

References

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