Noise reduction in video signals

Details Noise reduction in video signals Noise reduction in video signals

1994-11-28

1996-09-17

Kuntz, Curtis

Television

Image signal processing circuitry specific to television

Transition or edge sharpeners

348630, 348631, H04N 964

Patent

active

055573401

ABSTRACT:
In a high definition flying spot telecine, noise from photomultiplier tubes and afterglow correctors reaches unacceptable levels at high frequencies. The circuit illustrated applied a conventional gamma correction to low frequency components (at 32) but applies a non-linear characteristic to the high frequency components (at 36). The characteristic is chosen to provide the optimum noise performance for positive or negative film. The two parts of the signal are then recombined by adders 40. High frequency processing is carried out on a multiplex of the R, G and B components to reduce complexity (at 16).

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"Improved Signal Processing Techniques for Color Television Broadcasting", McMann, pp. 221-228, 1968.
Rank Cintel, "Vertical Aperture Corrector", Cat. No. 417-366, Handbook No. C430.

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