Patent ID: 6023672
Filing Date: 2000-02-08
Classification: G10L

Abstract:
A speech coder, comprising:a spectral parameter calculator obtaining a spectral parameter from an input speech signal and quantizing the spectral parameter;a divider diving M non-zero amplitude pulses of an excitation signal of the speech signal into groups, each of said groups of pulses having a number of pulses fewer than M; andan excitation quantizercalculating the positions of the pulses in each of said groups and simultaneously quantizing the amplitudes of the pulses using the spectral parameter,selecting and outputting at least one quantization candidate by evaluating distortion through addition of; (1) the evaluation value based on an adjacent group quantization candidate output value, and (2) the evaluation value based on the pertinent group quantization value, andencoding the speech signal using the selected quantization candidate.