Spectral line frequency vector quantization method and system

The present invention provides a method of line spectral frequency vector quantization, comprising: a line spectral frequency vector of the current frame or the current frame residual LSF vector is divided into two sub-vectors {a i }, {b j }, to obtain a set of sub-vectors coefficient values ​​a i after which a set of sub-vectors {a i } vector quantization q , select some of the sub-vector coefficient values ​​a j, k q of a set of sub-vector is not quantized {b j } prediction coefficients, the predicted value of the coefficient vector obtained sub b j predict ; a set of sub-vectors of the non-quantized {b j } subvector coefficients corresponding thereto coefficient prediction value b j predict for computing the difference, to obtain a set of predicted values ​​of the residual vector {b j '}, the predicted value of the residual vector {b j '} vector quantization. It can be obtained by the present invention and the AMR-WB + vector quantization method based on ITU-T P.862 standard protocol Reviews, objective speech quality evaluation using objective evaluation criteria for the WB-PESQ, with respect to the present invention is improved AMR-WB + PESQ perceptual evaluation of speech quality scores.