Perceptual Spatial - Audio Coding

A novel technique for the perceptual coding of spatial audio is presented. This coding technique allows individualized 3D audio presentation and exploits the dichotomous roles of the lowfrequency interaural timing and level difference cues versus the high-frequency spectral cues in human sound localization. The high-frequency spectral cues are modified to match the acoustics of the listener’s outer ears, while preserving the original lowfrequency interaural cues. The psychoacoustic principles and theory behind the coding scheme are described and sound localization data are shown demonstrating the fidelity of the coding technique. Based on the coding technique, we develop the notion of directional frequency bands and give some basic requirements for a 3D audio recording and reproduction system.