Temporal Transient Localization for Enhanced Pre-Echo Suppression

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Abstract:

A specially designed short window of reduced effective size and other supporting windows, as used in a switched MDCT audio codec, are sequenced in such a way that this special window is placed around transient samples, thereby providing transient localization while leaving frequency resolution unchanged. Pre-echo is better suppressed because transient localization reduces thespread of both quantization noise and high bitrates associated with transients.The overheads include one or two additiona lbits and a short procedure, both for windows equencing, and more memory for storing additional window functions.

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355-360

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July 2013

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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