Subband splitting, adaptive scalar prediction and vector quantization for speech coding
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This paper describes a new coding structure based on the combination of Vector Quantizati.on, Linear Prediction l)nd Subband Splitting that achieves high guality speech at rates below 10 Kbit/sec. In this scheme, a vector is formed with one sanple of the normalized prediction error of each band and then a vector quanti.zer is applied to it. This guantization of the prediction error a.llows to use scalar adaptive predictors while conserving the advantages of the vector guantization. The necessary noise shap~ for achjev:ing high subjective quality is obtained by the use of a Freguency-Weighted distance in thc vecto r guantizer
CitacióMasgrau, E., Fonollosa, José A. R., Mariño, J.B. Subband splitting, adaptive scalar prediction and vector quantization for speech coding. A: European Signal Processing Conference. "Signal processing IV : theories and applications : proceedings of EUSIPCO-88, Fourth European Signal Processing Conference, Grenoble, France, September 5-8, 1988". Grenoble: 1988, p. 1035-1038.