Method for searching Algebraic code in Algebraic codebook in voice coding

摘要

The present invention discloses a method of searching for a code number from the algebraic codebook in a speech encoder. Serial tracks, from the algebraic codebook, consisting of the pulse position within each track, the algebraic code search for the error between the target vector for the input audio signal to a minimum method corresponding to the set pulse number, each pulse number a predetermined number is , (a) the step of rearranging the pulse position according to the degree to contribute to pulse positions belonging to each of the tracks are configured to code words of each guharyeoneun algebraic code, (b) each of the track relative to the predetermined search range in the reconstructed algebraic codebook each comprises the step of selecting a candidate pulse positions to search and select a code number to the error between the target vector and the minimum in step (c) the candidate a combination of the selected candidate pulse position to obtain the number of candidate codes.