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本文描述一种语言数字转换算法,它能够以带宽约为3000Hz、在9.6—16kb/s的速率范围内提供高质量的语言。方案包括自适应预测器、自适应量化器及配有缓冲器的可变长码,但它既不要求周期性地传输编码器参数,也不要求测定基音,其结果是语言的质量还高于其它波形编码器的语言质量,而该方案的复杂性却又低于其它低数码率方案。
This article describes a language digital conversion algorithm that provides a high quality language at a bandwidth of about 3000 Hz over a range of 9.6-16 kb / s. The scheme includes an adaptive predictor, an adaptive quantizer, and a variable length code with a buffer, but it neither requires the periodic transmission of encoder parameters nor the determination of pitch, with the result that the quality of the speech is still higher than Other waveform encoders, the complexity of the scheme is lower than that of other low bit rate schemes.