Voice activity detection/silence suppression system
AssigneeAT&T Intellectual Property II, L.P.
InventorsBing Chen, James H. James
Life of this patent
Estimating the term…
Abstract
A Voice Activity Detection/Silence Suppression (VAD/SS) system is connected to a channel of a transmission pipe. The channel provides a pathway for the transmission of energy. A method for operating a VAD/SS system includes detecting the energy on the channel, and activating or suppressing activation of the VAD/SS system depending upon the nature of the energy detected on the channel.
Claims20
A method of controlling a communication channel, the method comprising:
- determining, using a processing device, whether there is a decrease in communication energy associated with the communication channel;
- determining, using the processing device, whether noise energy associated with the communication channel is constant based on a spectrum constancy criterion;
- and
- activating silence suppression, using the processing device, in response to determining that the noise energy associated with the communication channel is constant based on the spectrum constancy criterion and determining that communication energy associated with the communication channel is decreased, the activating of silence suppression comprising associating communication energy with the communication channel that was not already associated with the communication channel prior to activating silence suppression.
A computer-readable storage device comprising instructions stored thereon that, when executed by a processing device, cause the processing device to perform operations comprising:
- determining whether there is a decrease in communication energy associated with a communication channel;
- determining whether noise energy associated with the communication channel is constant based on a spectrum constancy criterion;
- and
- activating silence suppression in response to determining that the noise energy associated with the communication channel is constant based on the spectrum constancy criterion and determining that the communication energy associated with the communication channel is decreased, the activating of silence suppression comprising associating communication energy with the communication channel that was not already associated with the communication channel prior to activating silence suppression.
An apparatus to control a communication channel, the apparatus comprising:
- a processing device;
- and
- a computer-readable storage device storing instructions that, when executed by the processing device, cause the processing device to perform operations comprising:
- determining whether there is a decrease in communication energy associated with the communication channel;
- determining whether noise energy associated with the communication channel is constant based on a spectrum constancy criterion;
- and
- activating silence suppression in response to determining that the noise energy associated with the communication channel is constant based on the spectrum constancy criterion and that the communication energy associated with the communication channel is decreased, the activating of silence suppression comprising associating communication energy with the communication channel that was not already associated with the communication channel prior to activating silence suppression.
Dependencies are inferred from the claim text.