Capacity increase in voice over packets communications systems using novel noise canceling methods and apparatus
First Claim
Patent Images
1. A method of noise reduction and/or cancellation in voice over packets systems comprising the steps of:
- (a) detecting a speech signal from a microphone;
(b) detecting background noise from a microphone; and
(c) subtracting the background noise from the speech signal.
0 Assignments
0 Petitions
Accused Products
Abstract
Improvements to the capacity of voice over packets communication systems are achieved by use of a multi-microphone system. A voice microphone collects sound waves from the user as well as unwanted background noise. A second background microphone collects ambient sound. The inputs from the two microphones retain their analog format. The signal from the background microphone is subtracted from the input of the voice microphone. The resulting signal has an increased signal to noise ratio and thus increases the capacity of a voice over packets network.
-
Citations
12 Claims
-
1. A method of noise reduction and/or cancellation in voice over packets systems comprising the steps of:
-
(a) detecting a speech signal from a microphone;
(b) detecting background noise from a microphone; and
(c) subtracting the background noise from the speech signal. - View Dependent Claims (2, 3, 4)
-
-
5. A noise reducing and/or noise cancelling device comprising:
-
(a) means for detecting background noise;
(b) means for detecting a speech signal; and
(c) means for subtracting the background noise from the speech signal. - View Dependent Claims (6, 7, 8)
-
-
9. A method of increasing the capacity of a voice over packets channel by noise reduction or cancellation, comprising the steps of:
-
(a) detecting a speech signal from a microphone;
(b) detecting background noise from a microphone; and
(c) subtracting the background noise from the speech signal. - View Dependent Claims (10, 11, 12)
-
Specification