Adaptive time-based noise suppression

• Main Author: BEHBOODIAN ALI,BOILLOT MARC A.,DESAI PRATIK V.,WONG CHIN P
• Format: Patent
• Language: English
• Published: 24.10.2007
• Subjects: BANDAGES, DRESSINGS OR ABSORBENT PADS; DEAF-AID SETS; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; FILTERS IMPLANTABLE INTO BLOOD VESSELS; FIRST-AID KITS; FOMENTATION; HUMAN NECESSITIES; HYGIENE; LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS; MEDICAL OR VETERINARY SCIENCE; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; PROSTHESES; PUBLIC ADDRESS SYSTEMS; TELEPHONIC COMMUNICATION; TREATMENT OR PROTECTION OF EYES OR EARS

Systems, an apparatus, and methods are provided for mitigating noise associated with an audio signal. A system (100) for mitigating noise associated with an audio signal includes an estimator module (108). The estimator module determines an estimated level of noise associated with the audio signal. The system also includes an expander module (110). The expander module causes an attenuation of the audio signal if a level of the audio signal is below a signal threshold. The expander module is adaptively tunable so that the attenuation caused (606) by the expander module is based upon the level of noise estimated (602) by the estimator module.