Coding of LSP Parameters Using Interframe Moving Average Prediction and Multi-Stage Vector Quantization

Hitoshi OHMURO  Takehiro MORIYA  Kazunori MANO  Satoshi MIKI  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E76-A   No.7   pp.1181-1183
Publication Date: 1993/07/25
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section LETTER (Special Section of Letters Selected from the 1993 IEICE Spring Conference)
speech coding,  LSP,  vector quantization,  CELP,  interframe correlation,  mobile telephone,  cellular radio,  

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This letter proposes an LSP quantizing method which uses interframe correlation of the parameters. The quantized parameters are represented as a moving average of code vectors. Using this method, LSP parameters are quantized efficiently and the degradation of decoded parameters caused by bit errors affects only a few following frames.