FIELD: method and device for efficiency compression of audio signal to acoustic signal of level III of MPEG-1 standard with low information transfer speed.
SUBSTANCE: in accordance to audio signal encoding method, harmonic components are extracted with usage of information resulting from fast Fourier transformation, which is received with usage of psycho-acoustic model 2 to received audio data of impulse-code modulation. Then, extracted harmonic components are removed from received audio data of impulse-code modulation. After that audio data, from which extracted harmonic components have been removed, are subjected to modified discontinuous cosine transformation and quantization.
EFFECT: provision of efficient compression of signal at low speed by compressing changing part of signal only by means of modified discontinuous cosine transformation.
5 cl, 11 dwg
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