IMPROVED SPATIAL RESOLUTION OF SOUND FIELD FOR MULTI-CHANNEL AUDIO PLAYBACK SYSTEMS BY DERIVING SIGNALS WITH HIGH ORDER ANGULAR TERMS Russian patent published in 2011 - IPC H04S3/02 

FIELD: physics.

SUBSTANCE: received set of input audio signals representing the sound field as a function of angular directions with zero-order and first-order angular terms is analysed in order to derive statistical characteristics of one or more angular directions of acoustic energy in the sound field. A set of processed signals is derived from weighted combinations of the input audio signals in which the input audio signals are weighted according to the statistical characteristics. The input audio signals and the processed signals represent the sound field as a function of angular direction with angular terms of one or more orders greater than one.

EFFECT: high spatial resolution of audio signals, which enables to accurately recreate the audio perception of an acoustic phenomenon.

36 cl, 21 dwg