METHOD AND APPARATUS FOR AUTOMATIC REDUCTION OF NOISE IN SIGNALS TRANSMITTED OVER CONDUCTORS
First Claim
1. A method for automatic noise filtering of a signal transmitted over conductors comprising:
- providing selectable amounts of amplification to said signal; and
providing selectable amounts of noise filtering to said amplified signal.
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Abstract
A method and apparatus for automatic reduction of noise in video signals transmitted over conductors is presented. The present invention provides an adjustable amount of noise filtering matched to the amount of gain provided by an adjustable gain amplifier to a received video signal. One or more stages of a multi-stage discrete gain amplifier is provided with a corresponding noise filter circuit. The filter circuit is matched to the frequency response of and the amount of gain provided by the discrete gain amplifier stage. When the amplifier stage is applied to the received signal, the corresponding noise filter for that stage is invoked as well. In that manner, the amount of noise filtering applied to a video signal automatically varies with the amount of amplification provided to that signal.
18 Citations
20 Claims
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1. A method for automatic noise filtering of a signal transmitted over conductors comprising:
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providing selectable amounts of amplification to said signal; and providing selectable amounts of noise filtering to said amplified signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus for automatic noise filtering of a signal transmitted over conductors comprising:
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a discrete gain amplifier that provides selectable amounts of amplification to said signal; and a plurality of noise filters that provide selectable amounts of noise filtering to said amplified signal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification