Patent ID: 7561706

Claim:
Apparatus for transducing video signals and related audio signals in a vehicle including a source of said video signals and related audio signals in said vehicle, a first video display and a second video display mounted in said vehicle constructed and arranged to transduce said video signals and display visible images characteristic thereof, and first and second viewer seats in said vehicle constructed and arranged to allow first and second viewers in respective first and second viewer seats to view said images, the apparatus comprising: a first loudspeaker displaced from said first video display, a second loudspeaker displaced from said second video display, and signal processing circuitry coupling said source of audio signals to said first and second loudspeakers and constructed and arranged to process said audio signals so that said first and second viewers perceive sound radiated by said respective first and second loudspeakers as originating from said respective first and second video displays, wherein said signal processing circuitry is constructed and arranged to modify the spectral content of the audio signals applied to the first and second loudspeakers by applying filters having filter transfer functions H 3 (iω) for each of the first and second loudspeakers representing the differences between a head related transfer function H 1 (iω) between a source located at the actual first or second loudspeaker location and at least one ear of the corresponding first or second viewer when in the corresponding first or second seat and a head related transfer function H 2 (iω) between a source located at the corresponding first or second video display location and the at least one ear of the corresponding first or second viewer when in the corresponding first or second seat, the third transfer functions H 3 (iω) for each of the first and second loudspeakers corresponding to a filter transfer function that is H 2 (iω)/H 1 (iω) for the corresponding first or second loudspeakers.