METHOD AND APPARATUS FOR COMPRESSING AND RECONSTRUCTING HIGHER-ORDER AMBISONIC SYSTEM REPRESENTATION FOR SOUND FIELD Russian patent published in 2024 - IPC G10L19/08 

FIELD: physics.

SUBSTANCE: invention relates to a method and an apparatus for compressing and reconstructing a higher-order Ambisonic system representation for a sound field. HOA representation is analysed for the presence of dominant sound sources and their directions are evaluated. HOA representation is then decomposed into a number of dominant directional signals and a residual component. This residual component is transformed into a discrete spatial domain in order to obtain functions of common plane waves in uniform directions of sampling, which are predicted from dominant directional signals. Finally, the prediction error is converted back to the HOA region and represents a residual surrounding HOA component for which order reduction is performed, followed by perceptual coding of the dominant directional signals and the residual component.

EFFECT: invention improves the HOA sound field representation compression.

2 cl, 8 dwg