Parallel CABAC decoding for video decompression

Coded data generation or conversion – Digital code to digital code converters – To or from code based on probability

Reexamination Certificate

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C341S050000

Reexamination Certificate

active

07932843

ABSTRACT:
A method of video decoding is provided that includes receiving a data stream comprising a sequence of syntax elements that were compressed using context-adaptive binary arithmetic coding (CABAC), such that the encoding of each bin of a bin string representative of a syntax element was performed by arithmetic encoding. Two consecutive bins of a syntax element are decoded in parallel. Speculative computation and prefetching is used to reduce the critical path and thereby improve processing speed.

REFERENCES:
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patent: 7525459 (2009-04-01), Stein et al.
patent: 2009/0079602 (2009-03-01), Sze et al.
patent: 2009/0196355 (2009-08-01), Kao et al.
patent: 2009/0219183 (2009-09-01), Sakaguchi
patent: 2009/0304075 (2009-12-01), Ogura et al.
Detlev Marpe, et al., “Context-Based Adaptive Binary Arithmetic Coding in the H.264/AVC Video Compression Standard,” IEEE Transactions on Circuits and Systems for Video Technology, vol. 13, No. 7. Jul. 2003, pp. 1-17.
ITU-T Telecommunication Standardization Sector of ITU, “Series H: Audiovisual and Multimedia Systems, Infrastructure of Audiovisual Services—Coding of Moving Video; Advanced Video Coding for Generic Audiovisual Services”, ITU-T Recommendation H.264, Mar. 2005, pp. 1-343.
Vivienne Sze, et al., “Parallel CABAC for Low Power Video Coding,” Proc. IEEE International Conference on Image Processing, San Diego, CA, Oct. 12-15, 2008, pp. 2096-2099.

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