Efficient Encoding of Excitation Codes Using Trained Partial Algebraic Codebook

摘要

An efficient encoding method of excitation codes using a partial algebraic codebook (PAC) is proposed. Since the conventional algebraic code excited linear prediction (ACELP) encodes the positions and signs of all excitation pulses separately, the bits required for encoding excitation codes take a large por- tion of the total bit rate. Vector quantization (VQ) of the posi- PAC instead of the full set of algebraic codes, we can reduce the bits required to encode the excitation codes while maintain- ing the output speech quality.