使用线谱频率和帧重复编码的400-BPS声码器

MILCOM 1986 - IEEE Military Communications Conference: Communications-Computers: Teamed for the 90's Pub Date : 1986-10-01 DOI:10.1109/MILCOM.1986.4805791

J. Kowalski, Robert W. Schoepflin

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引用次数: 0

摘要

描述了一种利用帧重复矢量量化的400bps声码器，该声码器设计用于固定数据速率系统。它结合了对现有400-bps系统的几项改进。线谱频率参数是矢量量化使用感知有意义的失真度量。要重复的帧由缓冲区的数据长度决定，这决定了编码延迟。激励参数采用可变前瞻性方法进行网格编码，以最大限度地减少吞吐量延迟。

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A 400-BPS Vocoder using Line Spectral Frequencies and Frame Repeat Coding

A 400-bps vocoder utilizing frame repeat vector quantization is described that is designed to be used with fixed data rate systems. It combines several improvements over existing 400-bps systems. Line spectrum frequency parameters are vector quantized using a perceptually meaningful distortion metric. Frames to be repeated are determined from a buffer's length of data, which determines the coding delay. Excitation parameters are trellis coded using a variable lookahead approach to minimize throughput delay.

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MILCOM 1986 - IEEE Military Communications Conference: Communications-Computers: Teamed for the 90's

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