METHOD AND DEVICE FOR FORMING FROM REPRESENTATION OF HOA SIGNALS IN THE FIELD OF COEFFICIENTS OF MIXED REPRESENTATION OF MENTIONED HOA SIGNALS IN THE SPATIAL AREA / AREA OF COEFFICIENTS

摘要

There are two representations for Higher Order Ambisonics denoted HOA: spatial domain and coefficient domain. The invention generates from a coefficient domain representation a mixed spatial/coefficient domain representation, wherein the number of said HOA signals can be variable. A vector of coefficient domain signals is separated into a vector of coefficient domain signals having a constant number of elements and a vector of coefficient domain signals having a variable number of elements. The constant-number elements vector is transformed to a corresponding spatial domain signal vector. In order to facilitate high-quality coding, without creating signal discontinuities the variable-number elements vector of coefficient domain signals is adaptively normalised and multiplexed with the vector of spatial domain signals.