Patent ID: 6021206
Filing Date: 2000-02-01
Classification: H04S

Abstract:
An apparatus for sound reproduction of a sound information signal having spatial components describing the sound as it arrives at a listening position in a predetermined sound environment, said apparatus comprising:sound input means adapted to input said sound information signal;headtracking means for tracking a current head orientation of a listener listening to said sound information signal via sound emission sources and to produce a corresponding head orientation signal;sound information rotation means connected to said sound input means and said headtracking means and adapted to rotate said sound information signal through the multiplication of said sound information signal by a geometric rotation matrix having coefficients determined by said head orientation signal to a substantially opposite degree to the degree of orientation of said current head orientation of said listener to produce a rotated sound information signal; andsound conversion means connected to said sound information rotation means for converting said rotated sound information signal to corresponding sound emission signals for outputting by said sound emission sources such that the spatial components of said sound information signal are substantially maintained in the presence of movement of the orientation of head of said listener.