Title :
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
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;
Conference_Titel :
Computational and Information Sciences (ICCIS), 2013 Fifth International Conference on
Conference_Location :
Shiyang
DOI :
10.1109/ICCIS.2013.434
