Patent ID: 8165325
Filing Date: 2012-04-24
Classification: H04R,H04S

Abstract:
1. An automotive virtual surround audio system, which is implemented in an automobile to receive left- and right-channel audio sources to accordingly reproduce virtual audio image position, the system comprising: a synthesizer, for receiving the left- and right-channel audio sources to extend the sources into temporary rear-left and rear-right audio sources; a weighting device, for receiving the left- and right-channel audio sources to perform weighting operation and produce temporary front-left and front-right audio sources; a first filter, for receiving the temporary front-left and front-right audio sources to perform the filtering operation and produce virtual front-left and front-right audio sources; and a second filter for receiving the temporary rear-left and rear-right audio sources to perform a filtering operation and produce virtual rear-left and rear-right audio sources, wherein the synthesizer comprises three comb filters and a three-layer nested all-pass filter.