Patent ID: 7881479
Filing Date: 2011-02-01
Classification: G10K,H04R,H04S

Abstract:
1. An audio signal processing method comprising: emitting at least one sound at a virtual sound image location in a space outside a first closed surface; generating a set of directional transfer functions, each one of the directional transfer functions based on a result of a directional measurement of the at least one sound emitted at the virtual sound image location and detected at a selected one of a plurality of positions on the first closed surface using at least one directional microphone oriented outward; generating a corresponding set of omnidirectional transfer functions, each one of the omnidirectional transfer functions based on a result of an omnidirectional measurement of the at least one sound emitted at the virtual sound image location and detected at a corresponding one of the plurality of positions on the first closed surface using at least one omnidirectional microphone oriented outward, wherein for a corresponding omnidirectional transfer function of the set of omnidirectional transfer functions the corresponding one of the plurality of positions is the same location as the selected one of a plurality of positions; and generating a set of first composite transfer functions by adding, at a specified ratio and in correspondence for each one of the plurality of positions on the first closed surface, one of the directional transfer functions to a corresponding one of the omnidirectional transfer functions.