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A method to convert stereo to multi-channel sound

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While stereo music reproduction was a dramatic advance over mono, recently a transition to multi-channel audio has created a more involving experience for listeners. A new method to enhance the conversion from stereo to multi-channel sound reproduction is presented. A better sound distribution to the surround channels is achieved by using cross-correlation technique, and a stable center image is obtained using Principal Component Analysis.

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AES - Audio Engineering Society