Methods and Devices for Encoding Multi-Channel HOA Audio Signals for Noise Reduction and Methods and Devices for Decoding Multi-Channel HOA Audio Signals for Noise Reduction

摘要

PROBLEM TO BE SOLVED: To provide a method and an apparatus for decoding multi-channel HOA (High Order Ambisonics) audio signals for noise reduction.;SOLUTION: A method for encoding multi-channel HOA audio signals for noise reduction comprises the steps of: decorrelating (81) the channels using an inverse adaptive DSHT (Discrete Spherical Harmonics Transform), the inverse adaptive DSHT comprising a rotation operation (330) and an inverse DSHT (810), with the rotation operation rotating a spatial sampling grid of the iDSHT; perceptually encoding (82) each of the decorrelated channels; encoding rotation information (SI), the rotation information comprising parameters defining the rotation operation; and transmitting or storing the perceptually encoded audio channels and the encoded rotation information.;SELECTED DRAWING: Figure 3;COPYRIGHT: (C)2020,JPO&INPIT