Method and device for reducing moire when displaying a video sig

Details Method and device for reducing moire when displaying a video sig Method and device for reducing moire when displaying a video sig

1996-09-04

1998-03-17

Hsia, Sherrie

Television

Image signal processing circuitry specific to television

Noise or undesired signal reduction

348806, H04N 521

Patent

active

057293015

ABSTRACT:
In a method of reducing a moire phenomenon upon display of a video signal on a display device (4), the video signal is low-pass filtered (2) with a cut-off frequency substantially corresponding to a maximum frequency of a baseband portion of the video signal, to obtain a low-pass filtered video signal. The low-pass filtered video signal is filtered (3) in accordance with a transfer function substantially corresponding to the inverse of the transfer function of the display device, to obtain a filtered signal. Finally, the filtered signal is applied (3a) to the display device (4).

REFERENCES:
patent: 4908581 (1990-03-01), Honjo
patent: 5440353 (1995-08-01), Yamazaki

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