Patent ID: 6772115
Filing Date: 2004-08-03
Classification: G10L

Abstract:
A LSP quantizer comprising:a buffer that stores an input speech signal to be coded; an LPC analyzer that performs linear predictive analysis on a processing frame in said buffer to acquire linear predictive coefficients (LPCs) and converts said acquired linear predictive coefficients to a line spectrum pair (LSP); and a LSP adder that generates a plurality of line spectrum pairs, in addition to said line spectrum pair associated with said processing frame, generated by said LPC analyzer; a quantizing/decoding device that performs at least one of quantization and decoding on all of said line spectrum pairs generated by said LPC analyzer and said LSP adder, thereby generating decoded LSPs for all of said line spectrum pairs; a selector that selects a decoded LSP to minimize an allophone from said plurality of decoded LSPs; and a coder that codes said selected, decoded LSP.