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Jitter Reduction Technique for Bilevel, Interlaced Display

IP.com Disclosure Number: IPCOM000041091D
Original Publication Date: 1987-Jul-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Mago Jr, BF: AUTHOR

Abstract

This article describes a soatial algorithm for reducing the jitter in which a viewer may perceive on a bilevel, interlaced display.

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Jitter Reduction Technique for Bilevel, Interlaced Display

This article describes a soatial algorithm for reducing the jitter in which a viewer may perceive on a bilevel, interlaced display.

If adjacent lines in the odd and even fields of an interlaced display have opposite bilevel values, a viewer will notice a jitter in the image as a result of the interlaced method of generating the image. The following table shows the conditions under which jitter is evident.

Odd field, line x 111111 000000

Even field, line x 000000 or 111111

Odd field, line x+1 000000 111111

The amount of jitter can be reduced by changing the values of some of the pels in one of the lines causing the jitter. The table below shows the changes which could be made in line x of the odd field to reduce jitter. Every other pel value is shown changed only by way of example. Every third or fourth pel might be changed to reduce jitter.

Odd field, line x 101010 010101

Even field, line x 000000 or 111111

Odd field, line x+1 000000 111111

Disclosed anonymously.

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