Complexity Reduction Method for BSAC Decoder

ETRI Journal

关键词: complexity reduction algorithm;    lossless coding;    BSAC;    MPEG-4;   

Others  :  1185822
DOI  :  10.4218/etrij.09.0208.0391

【 摘 要 】

This letter proposes a complexity reduction method to speed up the noiseless decoding of a bit-sliced arithmetic coding (BSAC) decoder. This scheme fully utilizes the group of consecutive arithmetic-coded symbols known as the decoding band and the significance tree structure sorted in order of significance at every decoding band. With the same audio quality, the proposed method reduces the number of calculations that are performed during the noiseless decoding in BSAC to about 22% of the amount of calculations with the conventional full-search method.

   

【 参考文献 】

• [1]ISO/IEC 14496-3, Information Technology-Coding of Audio-Visual Objects-Part 3: Audio, 2001.
• [2]V.H.S. Ha et al., "Portable Receivers for Digital Multimedia Broadcasting," IEEE Trans. Consumer Electronics, vol. 50, May 2004, pp. 666-673.
• [3]S.H. Lee et al., "The MPEG-4 BSAC Audio Decoder in Terrestrial DMB Receiver," Proc. ICCE, 2006, pp. 257-258.
• [4]ISO/IEC JTCI/SG29/WG11 N2204, Conformance Testing, 1998.