With the advent of data transmission standards such as AC-3 (Dolby Digital) and MPEG there are many systems that include these features and the ancillary features such as discrete channel surround. Three dimensional sound has become a viable solution to replicate the sound field produced by these multi-channel surround sound formats. Many companies that have provided solutions for duplicating the multi-channel sound filed by displaying the audio over two speakers and by applying various techniques have duplicated a localized point source for the discrete left and right surround speakers. This paper will discuss a criteria and means for evaluating said virtual imaging systems.
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