Environmental noise reduction and cancellation for a...

Details Environmental noise reduction and cancellation for a... Environmental noise reduction and cancellation for a...

2007-05-17

2010-06-22

Chin, Vivian (Department: 2614)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C381S092000, C381S094100, C455S550100, C379S388030

Reexamination Certificate

active

07742790

ABSTRACT:
Various embodiments of the present invention enable a system and method for reducing or entirely canceling background or environmental noise from a voice transmission from a communications device. A communications device, such as a mobile telephone, is configured with an environmental noise compensation, correction, or counterbalanced (correction) signal generator that is connected between at least one microphone and a continuous time quadrant multiplication. Optional discrete time or digital signal processing may be applied. The original output of the at least one microphone and a compensation, correction, or counterbalanced or counter-balancing signal generated by the environmental noise compensation, correction, or counterbalanced signal generator are mixed or otherwise combined together after being received by the antenna to the receiver.

REFERENCES:
patent: 3810067 (1974-05-01), Heidecker
patent: 5969838 (1999-10-01), Paritsky
patent: 6185300 (2001-02-01), Romesburg
patent: 6415034 (2002-07-01), Hietanen
patent: 6505057 (2003-01-01), Finn et al.
patent: 6978010 (2005-12-01), Short et al.
patent: 7058368 (2006-06-01), Nicholls et al.
patent: 2007/0263847 (2007-11-01), Konchitsky

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