FIELD: physics, acoustics.
SUBSTANCE: invention relates to encoding and decoding means. Audio encoding system comprises liner prediction unit for input signal filtration on the basis of adaptive filter, unit to convert filtered input signal frame in conversion area and unit to quantise the signal in conversion area. In terms of input signal characteristics, quantisation unit decides to encode the signal in conversion area with the help of quantiser based on statistical model, or quantiser not based thereon. Preferably, the decision is based on the size of frame used by conversion unit.
EFFECT: higher quality of encoded and decoded signals at lower transmission rate.
18 cl, 34 dwg
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