A Low-Frequency Panning Method With Compensation for Head Rotation

Abstract

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Multichannel Compensated Amplitude Panning, An Adaptive Object-Based Reproduction Method

“…In this section a brief overview is presented of the main results from the development Stereo-CAP [8,12]. For a low frequency spherical head model the condition that the ITD and ILD cues match with the target plane wave can be formulated aŝ…”

“…wherer i are the direction vectors of the loudspeakers relative to the listener [8]. The gains at the loudspeakers are compensated for the variable distance to the loudspeakers.…”

“…The change in the perceived image direction when the head is rotated is caused by the ITD cue not matching that of a real source in the target direction. Compensated Amplitude Panning (CAP), is an extension of conventional panning methods in which the ITD cues are corrected by modifying the gains to take account of the head orientation of the listener [8]. For this system it is a challenging requirement to track the listener accurately in real-time with low latency and, preferably, without requiring any wearable device.…”

“…Previously we were able to develop CAP for twoloudspeaker reproduction (Stereo-CAP) [8] producing stable images in any direction in the low band. This improves on conventional stereo by providing a more stable front stage, while also adding all around imaging that can produce a fully immersive experience.…”

“…Listener adaptive energy based panning, or Vector Base Intensity Panning (VBIP) [9] can be combined with Stereo-CAP to provide stable full bandwidth imaging in the front stage between the loudspeakers [8]. In the central region between the loudspeakers the low band localization usually dominates to the extent that full bandwidth localization is possible in all directions.…”