Spatial audio is synthesized by controlling band energies and inter-channel interdependencies.

Evidence

In several time–frequency processing techniques for spatial audio (for example, Breebaart et al., 2005, 2007; Faller, 2006; and Herre et al., 2012) the spatial sound is synthesized by controlling the energies and interdependencies of the loudspeaker signals in the frequency bands. Let X1(k, m) and X2(k, m) be the signals of the two channels of a stereophonic set-up in the frequency domain with frequency band k and frame index m. The following parameters are often used to describe the channel or inter-channel energetic properties within a time–frequency area. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 2141

Categorization

• DEFINE: Frames the core parameters (energy, cross-term) underpinning parametric spatial-audio coding.