Digital correlation apparatus as for a television deghosting sys

Details Digital correlation apparatus as for a television deghosting sys Digital correlation apparatus as for a television deghosting sys

1985-12-24

1987-10-06

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358167, 358905, 370 84, 364724, H04N 514, H04N 521

Patent

active

046986804

ABSTRACT:
A television deghosting system includes an IIR filter having programmable filter coefficients which processes the input signals to remove ghost signal components. The IIR filter may be reconfigured as an FIR filter, having its coefficient and delay values changed to operate as a matched correlation filter. In this mode the filter is used to correlate a training signal to determine the relative delays of ghost signals with respect to the direct signal. The training signal used is the sum of the squared differentials of the in-phase and quadrature-phase components of the video IF signal during an interval defined by the leading edge of the vertical sync pulse and the first equalization pulse.

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Orfanidis, S. I., Optimum Signal Processing, an Introduction, pp. 280-289.

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