US Patent 7583805 Late reverberation-based synthesis of auditory scenes
Patent 7583805 was granted and assigned to Agere Systems on September, 2009 by the United States Patent and Trademark Office.
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A scheme for stereo and multi-channel synthesis of inter-channel correlation (ICC) (normalized cross-correlation) cues for parametric stereo and multi-channel coding. The scheme synthesizes ICC cues such that they approximate those of the original. For that purpose, diffuse audio channels are generated and mixed with the transmitted combined (e.g., sum) signal(s). The diffuse audio channels are preferably generated using relatively long filters with exponentially decaying Gaussian impulse responses. Such impulse responses generate diffuse sound similar to late reverberation. An alternative implementation for reduced computational complexity is proposed, where inter-channel level difference (ICLD), inter-channel time difference (ICTD), and ICC synthesis are all carried out in the domain of a single short-time Fourier transform (STFT), including the filtering for diffuse sound generation.
US Patent 07583805 Late reverberation-based synthesis of auditory scenes US Patent 7583805 Late reverberation-based synthesis of auditory scenes
US Patent 07583805 Late reverberation-based synthesis of auditory scenes
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