US 3,944,993 AGranted

Non-interlaced 263 TV line character generation system

AssigneeMetro Data Corporation

InventorsJames A. Dalke, Wayne E. Hough

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Abstract

A character generator system suitable for creating a character display on the screen of a standard TV receiver is disclosed. The character generator system includes a sync generator which generates timing and synchronizing signals that create a 263 line, non-interlaced, roster. The character generator system also includes a character generator adapted to receive binary signals that define the character display. The character generator is timed and synchronized by the sync generator so as to create a charater video signal suitable for creating the character display as the screen of the TV receiver is scanned. Color is added to the character video signal by a chroma generator in a manner such that the background is in one color and characters are in another color. The 263 line raster (non-interlaced) results in a color display without color fringing.

Claims4

Dependent claims

A character generation system suitable for creating a video signal adapted to create a color character display with a 263 TV line non-interlaced scan on the screen of a residential type TV receiver, comprising:

a sync generator suitable for generating a plurality of synchronizing signals adapted to create a 263 TV line non-interlaced scan, said synchronizing signals including a coded set of binary signals, said coded set of binary signals defining dots on a TV screen along a 263 TV line non-interlaced scan;
a character generator adapted to receive character nature signals from an external source and synchronizing signals from said sync generator, and generate a character video signal in accordance therewith suitable for application to a residential type TV receiver to create a character display along said 263 TV line non-interlaced scan;
and,
a chroma generator connected to said character generator so as to add chroma information to said character video signal whereby said character video signal is suitable for creating a color character display on the screen of a residential type TV receiver along said 263 TV line non-interlaced scan.

1 more element

Dependencies are inferred from the claim text.