Open AccessHigh Throughput Parallel Decoding Method for H.264/AVC CAVLC
Author(s) -
Yeo Donghoon,
Shin Hyunchul
Publication year - 2009
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.09.0109.0110
Subject(s) - computer science , decoding methods , parallel computing , throughput , scalability , reduction (mathematics) , context (archaeology) , sequential decoding , parallel processing , chip , computer hardware , algorithm , block code , mathematics , telecommunications , paleontology , geometry , database , wireless , biology
A high throughput parallel decoding method is developed for context‐based adaptive variable length codes. In this paper, several new design ideas are devised and implemented for scalable parallel processing, a reduction in area, and a reduction in power requirements. First, simplified logical operations instead of memory lookups are used for parallel processing. Second, the codes are grouped based on their lengths for efficient logical operation. Third, up to M bits of the input stream can be analyzed simultaneously. For comparison, we designed a logical‐operation‐based parallel decoder for M =8 and a conventional parallel decoder. High‐speed parallel decoding becomes possible with our method. In addition, for similar decoding rates (1.57 codes/cycle for M =8), our new approach uses 46% less chip area than the conventional method.