Signal characteristic determinator, method for determining a signal characteristic, audio encoder and computer program

Abstract

Embodiments according to the invention comprise a signal characteristic determinator, e.g. a calculator or an estimator, wherein the signal characteristic determinator is configured to determine an information about a characteristic of a sound field, e.g. a direction-of-arrival information or a diffuseness information, on the basis of higher-order, e.g. order larger than 1, spherical harmonic coefficients, also designated as SHCs, of a sound pressure, e.g. p(k), which may, for example, form the basis for Φ(k), and/or of a particle velocity and on the basis of spherical-harmonic-order dependent weights, e.g. weights g which determine the matrix G. Further embodiments of the invention comprise a signal characteristic determinator configured to determine an information about a characteristic of a sound field on the basis of higher-order circular harmonic coefficients of a sound pressure and/or of a particle velocity and on the basis of circular-harmonic-mode dependent weights.