Adaptive voice detection method and system
First Claim
1. A system for detecting a voice signal, 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 for receiving the input signal and for providing a second integrator output signal, the second integrator comprises 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.
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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.
8 Citations
15 Claims
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1. A system for detecting a voice signal, 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 for receiving the input signal and for providing a second integrator output signal, the second integrator comprises 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. - 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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receiving an input signal at first and second integrators, wherein the first integrator has a substantially 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 for receiving the input signal and for providing a second integrator output signal, the second integrator comprises a second attack time that is substantially slower than the first attack time;
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; and
a gate coupled to the comparator and configured for providing an output comprising an output signal comprising the voice signal, in response to receiving the signal indicating detection of the voice signal.
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Specification