Complex filter apparatus for use in an equalizer

Details Complex filter apparatus for use in an equalizer Complex filter apparatus for use in an equalizer

1995-06-14

1996-06-18

Groody, James J.

Television

Image signal processing circuitry specific to television

Noise or undesired signal reduction

348624, H04N 521

Patent

active

055283110

ABSTRACT:
A complex filter apparatus for correcting a complex valued input television signal Y having the real and the imaginary parts Y.sub.r and Y.sub.i to produce a complex filtered output television signal Z having the real and the imaginary parts Z.sub.r and Z.sub.i comprises: three filters having their respective filter coefficients (C.sub.r +C.sub.i), C.sub.i and Cr; a first adder for producing an output of (Y.sub.r +Y.sub.i); a first subtractor for producing an output of (Y.sub.r -Y.sub.i); a second subtractor for producing an output Y.sub.r (C.sub.r +C.sub.i)-(Y.sub.r +Y.sub.i)C.sub.i as the real part Z.sub.r ; and a third subtractor for generating an output Y.sub.r (C.sub.r +C.sub.i)-(Y.sub.r -Y.sub.i)C.sub.r as the imaginary part Z.sub.i.

REFERENCES:
patent: 5400084 (1995-03-01), Scarpa

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