Patent ID: 7010482
Filing Date: 2006-03-07
Classification: G10L

Abstract:
1. A method for interpolative coding input signals, said signals decomposed into or composed of a slowly evolving waveform and a rapidly evolving waveform having a magnitude, the method incorporating at least one of the following steps: (a) analysis-by-synthesis vector quantization of the rapidly evolving waveform parameter; (b) parametrizing the magnitude of the rapidly evolving waveform; (c) incorporating temporal weighting in the AbS VQ of the REW; or (d) incorporating spectral weighting in the AbS VQ of the REW; the method either (1) applying a filter to a vector quantizer codebook in the analysis-by-synthesis vector-quantization of the rapidly evolving waveform whereby to add self correlation to the codebook vectors or (2) using a coder in which a plurality of bits therein are allocated to the rapidly evolving waveform magnitude.