Method and apparatus for combining field and frame recursive noi

Details Method and apparatus for combining field and frame recursive noi Method and apparatus for combining field and frame recursive noi

1991-10-31

1993-02-09

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358105, H04N 521

Patent

active

051856646

ABSTRACT:
In order to obtain the benefits of benefits of field and frame recursive noise reduction while reducing the detriments thereof, a circuit arrangement includes a motion compensated frame recursive noise reduction circuit and a motion compensated field recursive noise reduction circuit. The outputs of these two noise reduction circuits are then combined. The motion compensation vectors for the field and frame recursive noise reduction circuits are determined such that in the case of little or no detected motion, the system is biased toward frame recursive noise reduction to achieve the best resolution on still and slow moving scenes. While in the case of increased motion, the circuit reverts more to field recursive noise reduction to reduce smearing.

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