Browse > Article

Real-Time Implementation of Wideband Adaptive Multi Rate (AMR-WB) Speech Codec Using TMS32OC6201  

Lee, Seung-Won (LG전자 DND 영상제품 연구소)
Bae, Keun-Sung (경북대학교 전자공학과 신호처리연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.29, no.9C, 2004 , pp. 1337-1344 More about this Journal
Abstract
This paper deals with analysis and real-time Implementation of a wide band adaptive multirate speech codec (AMR-WB) using a fixed-point DSP of TI's TMS320C6201. In the AMR-WB codec, input speech is divided into two frequency bands, lower and upper bands, and processed independently. The lower band signal is encoded based on the ACELP algorithm and the upper band signal is processed using the random excitation with a linear prediction synthesis filter. The implemented AMR-WB system used 218 kbytes of program memory and 92 kbytes of data memory. And its proper operation was confirmed by comparing a decoded speech signal sample-by-sample with that of PC-based simulation. Maximum required time of 5 75 ms for processing a frame of 20 ms of speech validates real-time operation of the Implemented system.
Keywords
AMR-WB; speech codec; DSP; real-time implementation; TMS320C6201;
Citations & Related Records
연도 인용수 순위
  • Reference
1 3GPP TS 26.193 AMR Wideband Speech Codec; Source Controlled Rate operation,' 3GPP Technical Specification
2 B. Bessette and R. Lefebvre et aI., Techniques for high-quality ACELP coding of wideband speech,' Eurospeech 2001, pp. 1997-2000, 2001
3 X. Maitre, 7 kHz audio coding within 64 kbits/s,' IEEE Journal on Selected Areas in Communications, pp. 283-298, February, 1988
4 Code Composer Studio Getting Started Guide,' Texas Instruments Technical Document, November, 2001
5 Y. Bistritz and S. Peller, Immittance spectral pairs (ISP) for speech encoding,' International Conference on Acoustics and Signal Processing, vol. 2, pp. 9-12, 1993   DOI
6 3GPP TS 26.173 AMR Wideband Speech Codec; ANSI-C code,' 3GPP Technical Specification
7 3GPP TS 26.171 AMR Wideband Speech Codec; General Description,' 3GPP Technical Specification
8 TMS32OC6000 Programmer's Guide,' Texas Instruments Technical Document, February, 2001
9 Wideband speech coding standards and applications,' Voice Age White Paper, September, 2001
10 3GPP TS 26.190 AMR Wideband Speech Codec; Transcoding Functions,' 3GPP Technical Specification