Patent ID: 6980951
Filing Date: 2005-12-27
Classification: G10L

Abstract:
1. In a Noise Feedback Coding (NFC) system, a method of searching N predetermined Vector Quantization (VQ) codevectors for a preferred one of the N VQ codevectors to be used in coding a speech or audio signal, comprising the steps of: (a) predicting the speech signal to derive a residual signal; (b) deriving a VQ input vector corresponding to a VQ error vector, based on the residual signal and a corresponding one of the N VQ codevectors; (c) repeating steps (b) for each of the N VQ codevectors to produce N VQ error vectors corresponding to the N VQ codevectors; and (d) selecting the preferred VQ codevector as a VQ output vector corresponding to the residual signal based on the N VQ error vectors.