重庆邮电大学学报（自然科学版）2016，Vol.28Issue(6)：789-796,8.DOI:10.3979/j.issn.1673-825X.2016.06.007
G．729．1算法的改进与DSP全汇编优化设计
G.729.1 algorithm improvement and DSP all assembly optimization design
摘要
Abstract
In the wideband speech coding algorithm of G.729.1 standard,based on sub-band correlation of inter-frames, spectral envelope coding of time-domain aliasing cancellation encoder reduces allocation bits with the difference Huffman coding.Considering the sub-band correlation between adjacent frames,a difference Huffman coding mode in sub-band of adjacent frames is added on the foundation of the original spectral envelope coding mode,which further reduces spectral en-velope of coded bits and improves the quality of synthesized speech.G.729.1 can adjust the coding rate according to the characteristics of channel at any time and can get a better wideband speech quality,which makes the encoding algorithm have a high complexity.Therefore,all assemble language based on TMS320VC5505 digital signal processor is adopted to the real-time implement of G.729.1 algorithm.And the further optimization is made for the assembly code of G.729.1 . The optimized G.729.1 algorithm can ensure the high-quality synthesis speech,improve the coding efficiency and achieve the real-time processing of the speech signal.关键词
宽带语音/G.729.1/谱包络编码/差分霍夫曼编码/汇编优化Key words
wideband speech coding/G.729.1/spectral envelope coding/difference Huffman coding/assembly optimization分类
信息技术与安全科学引用本文复制引用
王春柳,陈德宏,申星海..G．729．1算法的改进与DSP全汇编优化设计[J].重庆邮电大学学报（自然科学版）,2016,28(6):789-796,8.基金项目
国家自然科学基金（61304066）Foundation ItemThe National Natural Science Foundation of China （）
