FIELD: information technologies.
SUBSTANCE: audio signal includes the first audio channel and the second audio channel, at the same time coding includes filtration in subranges of each of the first audio channel and the second audio channel in complexly modulated bank of filters for provision of the first multitude of subrange signals for the first audio channel and the second multitude of subrange signals for the second audio channel, discretisation with reduction of frequency of each of subrange signals for provision of the first multitude of subrange signals discretised with reduction of frequency and the second multitude of subrange signals discretised with reduction of frequency, additional filtration in subranges of at least one of subrange signals discretised with reduction of frequency in additional bank of filters for provision of multiple sub-subrange signals, obtainment of spatial parametres from sub-subrange sigbals and from those subrange signals discretised with reduction of frequency, which are not exposed to additional filtration in subranges, and arrangement of single-channel audio signal, comprising subrange signals obtained from the first multitude subrange signals discretised with reduction of frequency and the second multitude of subrange signals discretised with reduction of frequency. Additionally, decoding is suggested, when coded audio signal, containing coded single-channel audio signal and set of spatial parametres, is decoded by means of decoding of coded single-channel audio channel for arrangement of multiple subrange signals discretised with reduction of frequency, additional filtration in subranges of at least one of subrange signals discretised with reduction of frequency in additional bank of filters for provision of multitude of sub-subrange signals and arrangement of two audio channels from spatial parametres, sub-subrange signals and those subrange signals discretised with reduction of frequency, which are not exposed to additional filtration.
EFFECT: provision of audio coding or decoding with application of spatial parametres.
24 cl, 14 dwg, 1 tbl
