High-speed H.264/AVC CABAC decoding

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The decoding of context-based adaptive binary arithmetic coding (CABAC) imposes a heavy performance requirement on H.264/AVC decoding systems particularly for large-scale video sequences. As a simple approach of elevating the operating frequency is not sufficient to meet the performance requirement, this paper proposes an efficient approach to accelerate the decoding, which is effective under relatively low operating frequency. Since the CABAC decoding procedure is highly sequential and has strong data dependencies, it is difficult to exploit parallelism and pipeline schemes. The proposed approach resolves the difficulties by modifying the operation chain based on a thorough analysis, eventually enabling both parallel operations and pipelining. More specifically, 1) several context models are simultaneously loaded from memory while context selection is performed in parallel and 2) bin-level pipelining is enabled by employing a small storage to remove structural hazards and data dependencies. Experimental results show that the proposed approach leads to the real-time decoding of HD sequences.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2007-04
Language
English
Article Type
Article
Citation

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY, v.17, no.4, pp.490 - 494

ISSN
1051-8215
DOI
10.1109/TCSVT.2007.893831
URI
http://hdl.handle.net/10203/990
Appears in Collection
EE-Journal Papers(저널논문)
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