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A linear prediction algorithm in low bit rate speech coding improved by multi-band excitation model

Fuyuan Mo

Abstract

A Linear Prediction Coding (LPC) algorithm in low bit rate speech coding improved by Multi-Band Ex- citation (MBE) model is presented. The detailed schemes of parameter extraction, quantitation, coding, and speech synthesis are introduced. In addition, a 1.6 kb/s speech coding/decoding system based on this algorithm is constructed with language C. By subjective evaluation, it is concluded that the performance of this system approaches or corresponds to that of 2.4 kb/s MELP algorithm.

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Key concepts: Speech coding, Vector sum excited linear prediction, Harmonic Vector Excitation Coding, Linear prediction, Linear predictive coding, Decoding methods, Computer science, Speech recognition