Title:
NOISE CANCELLATION SYSTEM IN AN ANALOG FM RECEIVER
Document Type and Number:
WIPO Patent Application WO2004077690
Kind Code:
A3
Abstract:
The system for noise cancellation in analog FM radio reception, comprises a signal level measuring unit (113) for measuring a signal level (S) of a received intermediate frequency radio signal (IF), a control unit (122) arranged to evaluate a predetermined criterion based on the signal level (S), the evaluation yielding a control variable (C) capable of having a first value and a second value, and a noise cancellation unit (124), arranged to output a left output audio signal (LDN) and a right output audio signal (RDN), based on a left input audio signal (LP) and a right input audio signal (RP), comprising an equalization unit (125) arranged to make the left output audio signal (LDN) substantially equal to the right output audio signal (RDN) if the control variable (C) equals the first value.
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| JPS52130556 | AUTOMATIC NOISE LIMITER |
| JPS547812 | SIGNAL AMPLIFYNG UNIT |
Inventors:
KERSELAERS ANTHONY (BE)
ELSEN FELIX (BE)
ELSEN FELIX (BE)
Application Number:
PCT/IB2004/050121
Publication Date:
October 28, 2004
Filing Date:
February 18, 2004
Export Citation:
Assignee:
KONINKL PHILIPS ELECTRONICS NV (NL)
KERSELAERS ANTHONY (BE)
ELSEN FELIX (BE)
KERSELAERS ANTHONY (BE)
ELSEN FELIX (BE)
International Classes:
H03G3/34; (IPC1-7): H04B1/16; H03G3/34
Foreign References:
| DE2929647A1 | 1981-02-12 | |||
| US4037057A | 1977-07-19 | |||
| EP0881779A2 | 1998-12-02 |
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