FIELD: physics, acoustics.
SUBSTANCE: invention is related to coding and decoding of wideband signals, such as separate audio signals. In audio coder number of sinusoids is assessed per single audio segment. Sinusoid is represented by frequency, amplitude and phase. Usually phase is quantised independently on frequency. In invention frequency is used independent on phase quantisation, and, in particular low frequencies are quantised with application of smaller quantisation intervals, than higher frequencies. Therefore, deployed phases of lower frequencies are quantised more accurately, possibly with lower range of quantisation, than phases of higher frequencies.
EFFECT: improved quality of decoded signal, especially for quantisers with low speed of bits transfer.
17 cl, 9 dwg
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