AUDIO ENCODER, AUDIO DECODER, AUDIO SIGNAL ENCODING AND DECODING METHODS, AUDIO STREAM AND COMPUTER PROGRAMME

摘要

FIELD: physics, acoustics.SUBSTANCE: invention relates to means of encoding and decoding an audio stream based on transformation of an input audio signal. An audio stream is obtained, which contains information describing the frequency band of the audio content and information describing a multi-band quantisation error. The multi-band quantisation error is determined for a plurality of frequency bands of the input audio signal in which there is gain information for separate bands. The average quantisation error for the plurality of frequency bands of the input audio signal is calculated. Frequency bands whose spectral components are completely quantised to zero are excluded. Noise is input into the spectral components for the plurality of frequency bands, wherein gain information in separate frequency bands is associated with the general value of intensity of multi-band noise.EFFECT: reducing the amount of encoded data.18 cl, 23 dwg