Audio time scale modification algorithm for dynamic playback...

Details Audio time scale modification algorithm for dynamic playback... Audio time scale modification algorithm for dynamic playback...

2008-05-12

2011-12-13

Warren, David S. (Department: 2832)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S211000, C704S503000

Reexamination Certificate

active

08078456

ABSTRACT:
A modified synchronized overlap add (SOLA) algorithm for performing high-quality, low-complexity audio time scale modification (TSM) is described. The algorithm produces good output audio quality with a very low complexity and without producing additional audible distortion during dynamic change of the audio playback speed. The algorithm may achieve complexity reduction by performing the maximization of normalized cross-correlation using decimated signals. By updating the input buffer and the output buffer in a precise sequence with careful checking of the appropriate array bounds, the algorithm may also achieve seamless audio playback during dynamic speed change with a minimal requirement on memory usage.

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