Dynamically controlled tuner AGC attack point

Details Dynamically controlled tuner AGC attack point Dynamically controlled tuner AGC attack point

2007-09-25

2007-09-25

Natnael, Paulos M. (Department: 2622)

Television

Image signal processing circuitry specific to television

Gray scale transformation

Reexamination Certificate

active

10909504

ABSTRACT:
A tuner is controlled to manage noise and distortion levels in a video signal. The tuner recovers an RF modulated video signal. A video demodulator provides a baseband video signal from the recovered RF modulated video signal. At least one of signal-to-noise ratio (SNR) and intermodulation distortion (IMD) is determined for the baseband video signal. An AGC attack point of the tuner is dynamically controlled in response to the SNR and/or IMD in order to improve the video quality.

REFERENCES:
patent: 5339454 (1994-08-01), Kuo et al.
patent: 6014547 (2000-01-01), Caporizzo et al.
patent: 6148189 (2000-11-01), Aschwanden
patent: 2004/0021798 (2004-02-01), Lindstrom et al.
patent: 2006/0187360 (2006-08-01), Hutchinson et al.
patent: 2006/0205372 (2006-09-01), Bouillet et al.

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