G - Physics – 10 – L
Patent
G - Physics
10
L
363/1, 354/50
G10L 11/02 (2006.01)
Patent
CA 1147071
METHOD OF AND APPARATUS FOR DETECTING SPEECH IN A VOICE CHANNEL SIGNAL Abstract of the Disclosure In a digital speech detector, a first detector produces an output signal if any sample of a voice channel signal has a magnitude exceeding a fixed threshold above noise levels. A second detector produces a second threshold which is adaptively adjusted to noise levels on the channel by being set to a level above the current sample magnitude each time that this does not exceed the preceding sample's magnitude. When the sample magnitude rises above the second threshold, and for each subsequent sample of successively increasing magnitude, the second detector produces an output signal. A speech decision for the voice channel is reached if either detector produces its output signal. The output signals of the first and second detectors are maintained for fixed and variable, respectively, hangover periods to maintain the speech decision during intersyllabic pauses in speech. The samples are supplied to the speech detector by an offset remover and averaging circuit. - i -
359968
Daaboul Fouad
Le Van Tiu
Haley R. John
Nortel Networks Corporation
LandOfFree
Method of and apparatus for detecting speech in a voice... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of and apparatus for detecting speech in a voice..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of and apparatus for detecting speech in a voice... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-171467