DECODING METHOD OF AUDIO SIGNAL AND DECODING APPARATUS THEREOF

摘要

PURPOSE: An audio signal decoding method and a decoding apparatus according to the same are provided to accurately restore an original audio signal by reducing 'a sound quality distortion which can be generated in an up-mixing operation'. CONSTITUTION: A receiving unit (110) receives a down-mixed signal and a spatial parameter. An up-mixing unit (120) includes first to n non-correlator ends (121,122) which are connected in a tree structure, mixes up the down-mixed signal by using the spatial parameter, and generates at least one up-mixing signal. 'At least one non-correlator which is included in at least one of first to (n-1) non-correlator ends' includes 'a first non-correlator which mixes up an inputted signal by using a first non-correlation signal which has a waveform which corresponds to the waveform of the inputted signal'. [Reference numerals] (110) Receiving unit; (121) First decorrelator unit; (122) n-th decorrelator unit