Patent ID: 6735567
Filing Date: 2004-05-11
Classification: G10L,H03G

Abstract:
A variable rate speech compression system for processing a frame of a speech signal to form an encoded speech signal, the speech compression system comprising:means for generating a first portion of the encoded speech signal as a function of a type classification and a rate selection of the frame; means for generating a second portion of the encoded speech signal as a function of the type classification and the rate selection; means for receiving the encoded speech signal and reconstructing linear prediction coefficients for the frame as a function of the rate selection; means for receiving the encoded speech signal and reconstructing short term excitation as a function of the rate selection and the type classification of the frame; and means for assembling the short-term excitation and the linear prediction coefficients to generate synthesized speech; where the means for receiving the encoded speech signal and reconstructing the excitation is operable to reconstruct the short term excitation on a subframe basis when the type classification of the frame is type zero.