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

Volume

1

fYear

2000

fDate

2000

Firstpage

388

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Communication Technology Proceedings, 2000. WCC - ICCT 2000. International Conference on

Conference_Location

Beijing

Print_ISBN

0-7803-6394-9

Type

conf

DOI

10.1109/ICCT.2000.889235

Filename

889235