Apparatus, method and computer program for encoding, decoding, scene processing and other procedures related to DirAC-based spatial audio coding using low-, medium- and high-order component generators

摘要

An apparatus for generating a sound field description from an input signal comprising one or more channels, the apparatus comprising: an input signal analyzer (600) for obtaining spread data from the input signal; for generating, from the input signal, one or more sound field components of a first group of sound field components having, for each sound field component, a directional component and a diffusing component, and a second of the sound field components having only a directional component from the input signal a sound component generator (650) for generating a group, the sound component generator being configured to perform energy compensation when generating the first group of sound field components, the energy compensation comprising the diffuse data and the second group of sounds at least one of the number of field components, the number of diffuse components of the first group, the maximum order of the sound field components of the first group, and the maximum order of the sound field components of the second group.