Rca Inc.

Alfred C Schroeder

Dalton H Pritchard

Roland N Rhodes

Warren H Moles

A ghost signal sampling arrangement is provided which includes a gate coupled to receive a ghost contaminated video signal. The gate passes a portion of the video signal including a main signal component available for use as a training signal and its corresponding ghost signal components. The gated signal portion is applied to a differentiator, which passes a first signal corresponding to the training signal, and subsequent signals corresponding to the ghost signal components when present. A clipping limiter is coupled to receive the signals produced by the differentiator, and produces a sampling signal corresponding to the first, training signal component, to the exclusion of the ghost signal components. A serial shift register is coupled to receive the sampling signal, which passes through the shift register and appears at sequential ones of its parallel outputs. A plurality of sampling circuits each have a control input coupled to respectively different outputs of the shift register, and a signal input coupled to the output of the differentiator. The sampling circuits sample the signal at the output of the differentiator in response to the application of a sampling signal at their respective inputs, thereby developing a time sequence of samples of the differentiator output signal. These samples may be applied to weighting function circuits for the development of weighting function signals for a ghost eliminator.

Sampling arrangement for a television ghost signal cancellation system

A television signal ghost eliminator is described, including a transversal filter having an input terminal, an output terminal at which a processed video signal is produced, a plurality of signal processing stages serially coupled between the input and output terminals, and a plurality of input taps coupled to the signal processing stages. A detected video signal is applied to the input terminal of the transversal filter and is transferred through the serially coupled stages. A circuit is responsive to the processed video signal for developing a plurality of weighting function signals which are applied to the input taps. The weighting function signals applied to the taps are combined with the detected video signal as it appears at the tapped stages, resulting in reduction in ghost signal components in the processed video signal which is produced at the output terminal of the transversal filter.

Input-weighted transversal filter TV ghost eliminator

A filter for use with a CCD imager has vertical color stripes that have a non-integral relationship to the CCD sensors. A means for controlling the amount of a particular color that falls on a particular photosensor suppresses undesired signals.

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Southampton, PA, United States of America

Alfred C Schroeder