Method for improving performance of a voice coder

Details Method for improving performance of a voice coder Method for improving performance of a voice coder

1998-09-09

2000-08-22

Zele, Krista

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

G10L 1912

Patent

active

06108624&

ABSTRACT:
This invention relates to a method for improving performance of voice coder. A target signal is calculated for a window, and the optimal candidate codebooks and optimal candidate codebook gains from the target signal for the window are searched for all codebook indices and all codebook optimal gains. Target signals for a second subframe are then calculated from the target signal for the window, optimal candidate codebooks and optimal candidate codebook gains for the first subframe. The optimal candidate codebooks and optimal candidate codebook gains for the second subframe from the target signal for the second subframe are searched and the optimal candidate codebooks and optimal candidate codebook gains for the first subframe are searched. The optimal codebook and optimal codebook gain for two subframes are selected from the respective target signal for the window, optimal candidate gains and all possible quantized gains for the first subframe and optimal candidate codebooks and optimal candidate codebook gains for the second subframe.

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