Adaptive voice detection method and system
First Claim
1. A system for detecting a voice signal, said system comprising:
- a first integrator for receiving an input signal and for providing a first integrator output signal, wherein the first integrator comprises a first attack time;
a second integrator, coupled in parallel with the first integrator, for receiving the input signal and for providing a second integrator output signal, wherein the second integrator comprises a second attack time that is slower than the first attack time; and
a comparator for receiving the first and second integrator output signals and for providing a comparator output signal indicating detection of the voice signal when the first integrator output signal exceeds the second integrator output signal by at least a threshold amount.
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Accused Products
Abstract
A system for detecting a voice signal includes: a first integrator for receiving an input signal and for providing a first integrator output signal, wherein the first integrator includes a first attack time; a second integrator for receiving the input signal and for providing a second integrator output signal, the second integrator including a second attack time that is substantially slower than the first attack time; and a comparator configured for receiving the first and second integrator output signals and for providing a comparator output signal indicating detection of a voice signal when the first integrator output signal exceeds the second integrator output signal by at least a threshold amount.
7 Citations
15 Claims
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1. A system for detecting a voice signal, said system comprising:
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a first integrator for receiving an input signal and for providing a first integrator output signal, wherein the first integrator comprises a first attack time; a second integrator, coupled in parallel with the first integrator, for receiving the input signal and for providing a second integrator output signal, wherein the second integrator comprises a second attack time that is slower than the first attack time; and a comparator for receiving the first and second integrator output signals and for providing a comparator output signal indicating detection of the voice signal when the first integrator output signal exceeds the second integrator output signal by at least a threshold amount. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for detecting voice signals, the method comprising:
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coupling a first integrator in parallel with a second integrator; receiving an input signal at the first and second integrators, wherein the first integrator has a faster response time than the second integrator; providing, to a comparator, a first integrator output signal and a second integrator output signal; comparing the first integrator output signal with the second integrator output signal, and providing a comparator output signal when, during a sampling period, the first integrator output signal exceeds the second integrator output signal by at least a predetermined level, wherein the comparator output signal indicates the presence of a voice signal in the input signal. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A voice activated switch comprising:
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a first integrator for receiving an input signal and for providing a first integrator output signal, wherein the first integrator comprises a first attack time; a second integrator, coupled in parallel with the first integrator, for receiving the input signal and for providing a second integrator output signal, the second integrator comprises a second attack time that is slower than the first attack time; a comparator for receiving the first and second integrator output signals and for providing a comparator output signal indicating detection of a voice signal when the first integrator output signal exceeds the second integrator output signal by at least a threshold amount; and
a gate coupled to the comparator and for providing an output comprisingan output signal comprising the voice signal, in response to receiving the signal indicating detection of the voice signal.
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Specification