低比特率语音编码的全面改进

IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI:10.1109/GLOCOM.1989.64271

Changxin Fan, Hongfei Ma

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引用次数: 0

摘要

提出了一种综合改进的线性预测编码(LPC)声码器方案。该方案采用了矢量量化(VQ)、线谱对参数和刚好可注意差误差准则等有效技术。通过使用这些技术，可以在不增加传输比特率的情况下将线性预测阶数从10提高到14，采样率从8提高到10 kHz。介绍了该方案的设计原则和技术指标。计算机仿真结果表明，该方法在2400 b/s的传输速率下具有很好的合成语音质量。本文还给出了原始语音和合成语音的声谱图，以供比较。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Comprehensive improvement in low bit rate speech coding

A comprehensive improved LPC (linear prediction coding) vocoder scheme is suggested. Many effective techniques are used in the scheme, such as vector quantization (VQ), line-spectrum pair parameters, and the just-noticeable-difference error criterion. By using these techniques it is possible to increase the linear prediction order from 10 to 14, and the sampling rate from 8 to 10 kHz without increasing the transmission bit rate. The design principles and the specifications of the scheme are introduced. Computer simulation shows that it gives very good synthetic speech quality at 2400 b/s. The sonograms of the original and synthesized speeches are also given for comparison.<>

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来源期刊

IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond

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