Spatial Audio Rendering with Cross-Talk Cancellation

The patent replaces the mechanical arrangement of loudspeakers with a signal processing system that uses amplitude panning and cross-talk cancellation algorithms. Instead of relying on physical loudspeaker separation to create spatial audio images, the system uses computational methods to simulate the acoustic effects of widely separated loudspeakers, thereby achieving high-quality spatial audio reproduction despite the close physical proximity of the actual loudspeakers.

The patent changes the parameters of the audio signal by applying amplitude panning to adjust the energy distribution between left and right channels, and cross-talk cancellation to modify the signal characteristics. These parameter transformations enable the close-spaced loudspeakers to reproduce spatial audio images that would normally require wide-spaced loudspeakers, effectively decoupling physical distance from audio quality.

The patent segments the audio processing into distinct functional stages: amplitude panning for basic spatial distribution and cross-talk cancellation for refining the spatial image. By dividing the processing task into these separate modules, the system achieves high spatial audio image accuracy while maintaining reasonable implementation complexity through modular design.

The patent introduces cross-talk cancellation processing as an intermediary step between the amplitude panning stage and the final audio output. This intermediate processing layer refines the spatial audio image by compensating for the limitations of simple amplitude panning, thereby improving spatial accuracy without requiring a complete redesign of the entire rendering system.