Optimization of 1.2 KBPS Melpe Based on ARM11

Author

Xiangpeng Pang ; Lizhi Li ; Xiaoqun Zhao

Author_Institution

Sch. of Electron. & Inf. Eng., Tongji Univ., Shanghai, China

fYear

2013

fDate

21-23 June 2013

Firstpage

1660

Lastpage

1662

Abstract

In this paper, the overview of the 1.2 kbps MELPe algorithm is presented. MELPe algorithm is an enhanced algorithm of MELP, providing 3 bit rate: 2.4 kbps, 1.2 kbps and 600 bps. In order to meet the demand of engineering application based on ARM1176JZF-S, the optimization is taken in the algorithm level and code level, the detailed process of optimization is presented. After optimization, the delay of per frame is decreased by 59% (from 135.1 ms to 55.4 ms). And the PESQ test shows that the optimization does not reduce the speech quality. The experimental results demonstrate that the optimization is feasible and effective.

Keywords

linear predictive coding; reduced instruction set computing; speech codecs; vocoders; ARM1176JZF-S; MELPe algorithm; PESQ test; bit rate; bit rate 1.2 kbit/s; bit rate 2.4 kbit/s; bit rate 600 bit/s; enhanced MELP algorithm; enhanced mixed excitation linear predictive vocoder; mixed-excitation linear prediction; optimization; speech codec; speech quality; Bit rate; Delays; Optimization; Prediction algorithms; Signal processing algorithms; Speech; Speech coding; ARM; MELP; Optimization;

fLanguage

English

Publisher

ieee

Conference_Titel

Computational and Information Sciences (ICCIS), 2013 Fifth International Conference on

Conference_Location

Shiyang

Type

conf

DOI

10.1109/ICCIS.2013.434

Filename

6643352