Patent ID: 8027494

Claim:
An acoustic image creation system for producing a left-right pair of surround sound image signals, from audio input signals including a left signal, a right signal, a left-rear signal, and a right-rear signal, the acoustic image creation system comprising: a left-rear localization processor configured to output a left-rear localization signal by summing together the left signal and the left-rear signal into a left summation result and perform a first left rear-localization-filtering-process on the left summation result to create a first left rear-localization-filtering-process result as the left-rear localization signal; a right-rear localization processing configured to output a right-rear localization signal by summing together the right signal and the right-rear signal into a right summation result and perform a first right rear-localization-filtering-process on the right summation result to create a first right rear-localization-filtering-process result as the right-rear localization signal; and an acoustic image creator configured to create the surround sound image signals, from the left signal, the right signal, the left-rear localization signal, and the right-rear localization signal.