METHOD AND DEVICE FOR COMPRESSING AND RESTORING REPRESENTATION OF HIGH-ORDER AMBISONIC SYSTEM FOR SOUND FIELD Russian patent published in 2017 - IPC G10L19/08 H04H20/89 H04S3/00 

FIELD: physics.

SUBSTANCE: HOA representation is analyzed for the presence of the dominant sound sources, and their directions are evaluated. The 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 sampling directions that are predicted from dominant directed signals. Finally, the prediction error is converted back to the HOA domain and represents the residual surrounding HOA component, for which the order is reduced, followed by perceptual coding of the dominant directional signals and the residual component.

EFFECT: improving the quality of the compressed representation of the HOA sound field.

14 cl, 8 dwg