Abstract
Are proposed one method and apparatus for determining one of weighting function for quantizing one coefficient of linear predictive coding (LPC) and that has an lower complexity. Apparatus of the determination of function of weighting may convert one LPC coefficient of one subframe of an intermediate signal of entrance is one of one of coefficient of imitation spectral frequency (ISF) and one of coefficient of line spectral frequency (LSF) and may determine one of weighting function associated with an importance of the ISF coefficient or the LSF coefficient with base in the ISF coefficient or LSF coefficient converted.
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