METHOD AND APPARATUS FOR GENERATING FROM A COEFFICIENT DOMAIN REPRESENTATION OF HOA SIGNALS A MIXED SPATIAL/COEFFICIENT DOMAIN REPRESENTATION OF SAID HOA SIGNALS

摘要

There are two representations for higher order ambisonics denoted by HOA: spatial domain and coefficient domain. The present invention generates a spatial/coefficient mixed domain expression from the coefficient domain expression, and the number of HOA signals may be variable. The vector of coefficient domain signals is divided into a vector of coefficient domain signals having a constant number of HOA coefficients and a vector of coefficient domain signals having a variable number of HOA coefficients. A vector of a certain number of HOA coefficients is transformed into a corresponding spatial domain signal vector. In order to enable high quality coding without generating signal discontinuities, a vector of HOA coefficients of a variable number of coefficient domain signals is adaptively normalized and multiplexed with a vector of spatial domain signals.