METHOD AND APPARATUS FOR GENERATING FROM A COEFFICIENT DOMAIN REPRESENTATION OF HOA SIGNALS A MIXED SPATIAL/COEFFICIENT DOMAIN REPRESENTATION OF SAID HOA SIGNALS Russian patent published in 2018 - IPC G10L19/08 H04S3/00 

FIELD: data processing.

SUBSTANCE: invention relates to apparatuses for generating from a coefficient domain representation of HOA signals a mixed spatial domain representation of said HOA signals. Method comprises separating a vector of HOA coefficient domain signals into a first vector of coefficient domain signals having a constant number of HOA coefficients, and a second vector of coefficient domain signals having over time a variable number of HOA coefficients. First vector of coefficient domain signals transformed to a corresponding vector of spatial domain signals by multiplying said vector of coefficient domain signals with the inverse of a transform matrix. Said vector of spatial domain signals is PCM encoded so as to get a vector of PCM encoded spatial domain signals. Said second vector of coefficient domain signals is normalised, wherein the normalising is an adaptive normalisation.

EFFECT: generating representation of HOA signals in the spatial domain without reducing the dynamic range and without loss of signal quality.

15 cl, 8 dwg