New bitstream structure for parallel context-adaptive-variable-length-coding decoding

Yun-Gu Lee; Kyunghwan Cho

doi:10.1117/1.JEI.21.4.043002

1 October 2012 New bitstream structure for parallel context-adaptive-variable-length-coding decoding

Yun-Gu Lee, Kyunghwan Cho

Author Affiliations +

Journal of Electronic Imaging, Vol. 21, Issue 4, 043002 (October 2012). https://doi.org/10.1117/1.JEI.21.4.043002

Abstract

A context-adaptive-variable-length-coding (CAVLC) decoder cannot determine an exact start position of the k'th syntax element until it decodes the (k - 1)'th syntax element, which makes parallel CAVLC decoding difficult. We propose a new bitstream structure to maximize parallelism of CAVLC decoding. Our algorithm enables us to simultaneously access multiple points from different MBs in a bitstream. Then, a CAVLC decoder can concurrently read multiple symbols from the multiple access points and decode them in parallel. Experimental results show that the proposed algorithm significantly increases decoding speed without sacrificing coding efficiency.

Citation Download Citation

Yun-Gu Lee and Kyunghwan Cho "New bitstream structure for parallel context-adaptive-variable-length-coding decoding," Journal of Electronic Imaging 21(4), 043002 (1 October 2012). https://doi.org/10.1117/1.JEI.21.4.043002

Published: 1 October 2012

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