METHOD FOR REDUCING THE SEARCH COMPLEXITY IN ANALYSIS-BY-SYNTHESIS CODING

摘要

A method of encoding speech includes a limited searchof a tree-code excitation codebook with a closed loop gaincalculation for each test path under consideration. Thegain calculation occurs when minimizing an error distancemeasurement between a synthetic signal defined by eachtest path being considered and the appropriate speechsignal by optimizing a scaling factor of the syntheticsignal. The encoding method achieves a significantreduction in computational complexity with minimal loss ofperformance.