FIELD: physics.
SUBSTANCE: encoder comprises an analyzer configured to extract the prediction coefficients and the residual signal from the audio signal frame. The encoder contains a module for computing formant information to calculate information of generating a speech spectrum from the prediction coefficients, a module of calculating the gain parameters, configured to calculate the gain parameter of the unvoiced residual signal and information of generating the spectrum, and a module of generating the streams of bits, configured to generate the output signal based on information associated with a vocalized signal frame, a gain parameter, or a quantized gain parameter and predictor coefficients.
EFFECT: ability to maintain the voice quality while reducing the bit rate.
18 cl, 17 dwg
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