Patent ID: 7389227
Filing Date: 2008-06-17
Classification: G10L

Abstract:
1. A high speed search method in a speech encoder using an order character of LSP (Line Spectrum Pair) parameters in an LSP parameter quantizer using SVQ (Split Vector Quantization) used in a low-speed transmission speech encoder, the high-speed search method comprising the steps of: rearranging a first codebook by replacing the first codebook with a new codebook in which a number of code vectors in the new codebook are arranged in an order according to an element value of a reference row of the first codebook for determining a range of code vectors to be searched; and determining a search range by using an order character between a given target vector and an arranged code vector to obtain an optimal code vector, wherein the rearranging step comprises the steps of: selecting the reference row in the first codebook by using a plurality of voice data, and then determining an optimal arrangement position (Nm) in which an average search range is minimized; and replacing the first codebook with the new codebook in which a number (Lm) of code vectors in the new codebook are arranged in a descending order according to the element value of a selected said reference row.