Fast time-scale modification of digital signals using a...

Details Fast time-scale modification of digital signals using a... Fast time-scale modification of digital signals using a...

2011-03-01

2011-03-01

Dorvil, Richemond (Department: 2626)

Data processing: speech signal processing, linguistics, language

Audio signal time compression or expansion

C704S504000

Reexamination Certificate

active

07899678

ABSTRACT:
The time-scale of a digital signal is efficiently modified. A system suitable for embedded or stand-alone processing includes a module that can transform the time-scale of the signal according to a user's preference. An improved method for time-scale modification is based on envelope-matching but introduces a new function that is very fast to compute, the use of which avoids the computation of correlation coefficients where they are not needed. The invention is demonstrably faster than other methods related to SOLA (synchronized-overlap-and-add) with envelope matching, yet with no sacrifice in quality of the processed output.

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Wong, J. et al., Fast Time Scale Modification Using Envelope-Matching Technique (EM-TSM), ISCAS '98 Proceedings of the IE Symposium on Circuits and Systems, May 31-Jun. 3, 1998.

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