Title :
A new 1.2 kb/s speech coding algorithm and its real-time implementation on TMS320LC548
Author :
Liang, Chen ; Xiongwei, Zhang
Author_Institution :
Inst. of Commun. Eng., PLA Univ. of Sci. & Technol., Nanjing, China
Abstract :
In order to meet the needs of wireless digital communication, a new 1.2 kb/s speech coding algorithm based on mixed excitation linear prediction (MELP) is proposed in this paper. Compared with the US Federal Standard 2.4 kb/s MELP algorithm, this new algorithm improves several aspects such as model structure, LSF (line spectrum frequency) quantization and decoding. This algorithm has been implemented on Texas Instruments TMS320LC548 DSP processor. Informal listening test results show that the intelligibility, naturalness and anti-noise performance of the 1.2 kb/s speech coding algorithm are comparable to those of the 2.4 kb/s MELP algorithm
Keywords :
decoding; digital signal processing chips; linear predictive coding; quantisation (signal); speech coding; speech intelligibility; vocoders; 1.2 kbit/s; MELP algorithm; Texas Instruments TMS320LC548 DSP processor; US Federal Standard; anti-noise performance; decoding; intelligibility; line spectrum frequency quantization; mixed excitation linear prediction; model structure; naturalness; real-time implementation; speech coding algorithm; vocoder; wireless digital communication; Band pass filters; Decoding; Digital signal processing; Linear predictive coding; Matched filters; Quantization; Speech coding; Speech synthesis; Testing; Vocoders;
Conference_Titel :
Communication Technology Proceedings, 2000. WCC - ICCT 2000. International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-6394-9
DOI :
10.1109/ICCT.2000.889235
