Image analysis – Pattern recognition – Feature extraction
Reexamination Certificate
2008-04-08
2008-04-08
Desire, Gregory M (Department: 2624)
Image analysis
Pattern recognition
Feature extraction
C341S132000, C341S143000, C381S094800, C704S500000
Reexamination Certificate
active
10227099
ABSTRACT:
A system allows greater dynamic range in fixed-width sample representations of waveforms. Known properties of the waveform are used to determine an unlikely, or impossible, data condition to be used as an exception condition. Samples following the exception condition are assumed to be shifted by a predetermined amount so that their representation within the allowable dynamic range of the word results in an extended dynamic range. In a preferred embodiment, pre-processing of a waveform is used to create exception conditions and to shift portions of the waveform that would otherwise become clipped, so that the waveform peaks reside in a shifted position within the digital representation. Analogously, playback processing serves to detect the exception conditions and to restore the peaks of the waveform back to their original status for, e.g., audible digital-to-analog playback, high-resolution processing, etc.
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