Pulse or digital communications – Systems using alternating or pulsating current – Antinoise or distortion
Reexamination Certificate
2011-01-18
2011-01-18
Fan, Chieh M (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Antinoise or distortion
C375S346000, C455S296000, C704S226000
Reexamination Certificate
active
07873114
ABSTRACT:
An apparatus (100) and method (200) for detecting the presence of abrupt noise is provided. The method can include estimating (210) a subband energy of the signal, calculating (220) a peak-to-peak energy difference (345), and calculating (230) a spectrum deviation (426). A request to update a noise channel estimate can be declared if a) a total estimated channel energy is greater than a predetermined noise floor (442), and b) the spectrum deviation is less than a predetermined variance threshold (444), and c) the peak-to-peak energy difference is less than a predetermined peak-to-peak threshold (446), or d) if a voice metric is less than a voice level threshold (448).
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Fan Chieh M
Lee Siu M
Motorola Mobility, Inc.
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