EVAN SCOTT MCCARTHY
Pilots at Santa Rida, Irvine, CA
License number
California A4302286
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
22 Santa Rida, Irvine, CA 92606
Professional information
Systems And Methods For Enhancing Audio Quality Of Fm Receivers
US Patent:
2013019, Aug 1, 2013
Filed:
Jan 31, 2012
Appl. No.:
13/362244
Inventors:
Thomas F. Baker - Dana Point CA, US
Evan S. McCarthy - Irvine CA, US
Jes Thyssen - San Juan Capistrano CA, US
Walter J. Wihardja - Tustin CA, US
David C. Garrett - Tustin CA, US
Evan S. McCarthy - Irvine CA, US
Jes Thyssen - San Juan Capistrano CA, US
Walter J. Wihardja - Tustin CA, US
David C. Garrett - Tustin CA, US
Assignee:
Broadcom Corporation - Irvine CA
International Classification:
H04B 1/10, H04B 17/00, H03D 1/04
US Classification:
375227, 375346, 375350
Abstract:
Systems and methods are described for enhancing the audio quality of an FM receiver. In embodiments described herein, quadrature L−R demodulation is applied to a composite baseband signal output by an FM demodulator to obtain an L−R noise signal. A channel quality measure is calculated based on the L−R noise signal and is used to control whether a pop suppression technique is applied to an L+R signal obtained from the composite baseband signal to detect and remove noise pulses therefrom. The channel quality measure and the L−R noise signal are also leveraged to perform single-channel noise suppression in the frequency domain on an L−R signal obtained from the composite baseband signal and on the L+R signal. The channel quality measure is also used to control the application of a fast fading compensation process that replaces noisy segments of the L−R and L+R signal with replacement waveforms generated via waveform extrapolation.
Systems And Methods For Enhancing Audio Quality Of Fm Receivers
US Patent:
2013019, Aug 1, 2013
Filed:
Jan 31, 2012
Appl. No.:
13/362277
Inventors:
Thomas F. Baker - Dana Point CA, US
Evan S. McCarthy - Irvine CA, US
Jes Thyssen - San Juan Capistrano CA, US
Walter J. Wihardja - Tustin CA, US
David C. Garrett - Tustin CA, US
Evan S. McCarthy - Irvine CA, US
Jes Thyssen - San Juan Capistrano CA, US
Walter J. Wihardja - Tustin CA, US
David C. Garrett - Tustin CA, US
Assignee:
BROADCOM CORPORATION - Irvine CA
International Classification:
H04L 27/06, H04B 17/00, H03D 1/06
US Classification:
375227, 375340, 375341
Abstract:
Systems and methods are described for enhancing the audio quality of an FM receiver. In embodiments described herein, a stop band noise signal is extracted from an L+R or L−R signal produced by an FM stereo decoder. A channel quality measure is calculated based on the stop band noise signal and is used to control whether a pop suppression technique is applied to the L+R signal. The channel quality measure and the stop band noise signal are also leveraged to perform single-channel noise suppression in the frequency domain on the L−R signal and on the L+R signal. The channel quality measure is also used to control the application of a fast fading compensation process that replaces noisy segments of the L−R and L+R signal with replacement waveforms generated via waveform extrapolation.