Patent ID: 6188980
Filing Date: 2001-02-13
Classification: G10L

Abstract:
A speech encoding system using an analysis by synthesis approach on a speech signal, the speech encoding system comprising:an encoder that generates a series of line spectral frequencies, some of the line spectral frequencies are produced out of order;the encoder determines the number of line spectral frequencies that are produced out of order;the encoder selectively applies a first of a plurality of correction techniques to process the series of line spectral frequencies that are produced out of order if the number of line spectral frequencies that is produced out of order exceeds a first predetermined threshold;the encoder selectively applies a second of the plurality of correction techniques to process the series of line spectral frequencies that are produced out of order if the number of line spectral frequencies that is produced out of order exceeds a second predetermined threshold; andthe second of the plurality of correction techniques comprises reordering the series of line spectral frequencies that are produced out of order.