Wind Noise Reduction

• US 20100082339A1
• Filed: 09/27/2009
• Published: 04/01/2010
• Est. Priority Date: 09/30/2008
• Status: Abandoned Application

• Current Assignee: Noise Free Wireless Incorporated
• Original Assignee: Alon Konchitsky
• Inventors: Ganapathy Kathirvelu, Hariharan, Berstein, Alberto D., Kulakcherla, Sandeep, Fitzgerald, Kevin, Konchitsky, Alon, Ribble, William Martin, Seferovich, Don
• Application Number:
  US12/567,787
• Publication Number:
  US 20100082339A1
• Time in Patent Office: Days
• US Class Current: 704/226
• CPC Class Codes: G10L 21/0208 Noise filtering

Abstract

By monitoring the wind noise in a location in which a cellular telephone is operating and by applying noise reduction and/or cancellation protocols at the appropriate time via analog and/or digital signal processing, it is possible to significantly reduce wind noise entering into a communication system.

Claims

1. A method of improving the signal to noise ratio within communication devices, the method comprising:

a) measuring a windowed speech signal and a noise signal, wherein the speech signal may be represented as s(k) and the noise signal may be represented as n(k) and wherein the sum of the two may be denoted by x(k), wherein x(k)=s(k)+n(k) the latter being labeled as equation (1);

b) taking the Fast Fourier Transform (FFT) of both sides of equation (1) yielding;

X(e^jw)=S(e^jw)+N(e^jw) and is equation (2) and

2. The method of claim 1 wherein gains per bin is calculated in place of gains per channel.