HOA HOA METHOD AND APPARATUS FOR ENCODING MULTI-CHANNEL HOA AUDIO SIGNALS FOR NOISE REDUCTION AND METHOD AND APPARATUS FOR DECODING MULTI-CHANNEL HOA AUDIO SIGNALS FOR NOISE REDUCTION

摘要

A method of encoding a multi-channel HOA audio signal for noise reduction comprises decorrelate a channel using inverse adaptive DSHT (81)-the inverse adaptive DSHT performs rotation operation 330 and inverse DSHT 810. And the rotation operation rotates the spatial sampling grid of the iDSHT-perceptually encoding each of the decorrelated channels (82) and encoding rotation information (SI)-the rotation information is And a parameter defining the rotation operation, and transmitting or storing the perceptually encoded audio channel and the encoded rotation information.