An Improved Scheme of Vector Quantization in LD-CELP Speech Coding Algorithm

HUANG De-zhi; MA Jin-wen

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An Improved Scheme of Vector Quantization in LD-CELP Speech Coding Algorithm

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- An Improved Scheme of Vector Quantization in LD-CELP Speech Coding Algorithm
- Acta Electronica Sinica Vol. 29, Issue 10, Pages: 1415-1417(2001)
- 作者机构：
  
  汕头大学数学研究所,广东,汕头,515063
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN912.3
- Published：2001
- 稿件说明：
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HUANG De-zhi, MA Jin-wen. An Improved Scheme of Vector Quantization in LD-CELP Speech Coding Algorithm[J]. Acta Electronica Sinica, 2001, 29(10): 1415-1417.
DOI：

HUANG De-zhi, MA Jin-wen. An Improved Scheme of Vector Quantization in LD-CELP Speech Coding Algorithm[J]. Acta Electronica Sinica, 2001, 29(10): 1415-1417. DOI：

摘要

本文介绍了LD-CELP算法的基本原理

在分析其编码的矢量量化过程的基础上提出了一种旨在提高编码速度的改进方案.模拟实验表明

改进算法的编码速度平均提高了一倍.虽然信噪比有所下降

但下降幅度仅为1.2dB

依然能够保证编码质量.

Abstract

In this paper

the basic principle of LD-CELP (Low-Delay Code Excited Linear Prediction) Algorithm is introduced.Based on a detailed analysis of the vector quantization of the algorithm

an improved scheme is proposed to increase the coding speed of LD-CELP algorithm.It is shown by simulation experiments that with the improved scheme

the coding speed has been doubled

while the SNR has decreased by about 1.2dB which is small enough to guarantee the quality of the coding.

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