FIELD: physics; acoustics.
SUBSTANCE: invention relates to a method for synthesising a monophonic sound signal based on an existing encoded multichannel sound signal. The encoded multichannel sound signal contains separate parametre values for each channel of the multichannel sound signal for at least the upper frequency band, where parametre values of several channels are combined in a region for parametre values. Combination of parametre values is controlled for at least one parametre based on information on corresponding activity in the said several channels. After that, combined parametre values are used to synthesise a monophonic sound signal. The invention also relates to the corresponding sound decoder and the corresponding encoding system.
EFFECT: reduced computing load necessary for synthesising a monophonic sound signal based on an encoded multichannel sound signal.
18 cl, 9 dwg
