FIELD: radio engineering, communication.
SUBSTANCE: in the vocoder based on linear prediction, the excitation signal vector is searched on the basis of vector quantization using an analysis procedure through synthesis on previously trained small code books that are statistically related to the initial parameter vector describing the state of the voice path. The index of the vocal path parameter vector, the codebook subspace vector of the small dimension of the excitation signal parameters statistically associated with the vocal path parameter vector and the corresponding scaling coefficient of the excitation signal are transmitted on the communication channel to synthesise the speech signal on each quasi-stationary segment of the speech signal analysis.
EFFECT: improving the quality of the synthesised speech signal in low-speed vocoder with linear prediction with limitations on the data transfer rate.
4 dwg
