A novel quantization scheme for the noise-like component in waveform interpolation speech coding

Abstract

This paper presents a novel and efficient coding scheme for the noise-like component in wavefonn interpolation speech coding. The techniques employed in the task are described in detail and the advantages gained by using them are discussed. These techniques are shown to enable perceptually transparent coding of the magnitude spectra of the noise-like component with only ten bits per frame and to offer speech quality improvements at higher bit rates. The most significant features of the proposed scheme are smoothed representation and matrix quantiza tion of the magnitude spectra. The proposed coding tech niques can be used for enhancement of speech coders based on the wavefonn interpolation approach.