Browse Prior Art Database

Frame Grabber Card

IP.com Disclosure Number: IPCOM000099358D
Original Publication Date: 1990-Jan-01
Included in the Prior Art Database: 2005-Mar-14
Document File: 1 page(s) / 36K

Publishing Venue

IBM

Related People

Dattilo, AJ: AUTHOR

Abstract

Improved input and output sections for a video frame grabber card are described herein. Standard NTSC video is separated into the three color components and converted into digital format. The three signals are transformed using the three application loadable LUTs. These three 8-bit converted signals are then combined into a single 8-bit signal by a logical "OR". By properly loading the input LUTs, the data collected can be either a 24-bit RGB or an 8-bit RGB. The 24-bit mode is a sequential capture. The 8-bit mode can be passed directly through to the output for a real time display.

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Frame Grabber Card

       Improved input and output sections for a video frame
grabber card are described herein.  Standard NTSC video is separated
into the three color components and converted into digital format.
The three signals are transformed using the three application
loadable LUTs.  These three 8-bit converted signals are then combined
into a single 8-bit signal by a logical "OR".  By properly loading
the input LUTs, the data collected can be either a 24-bit RGB or an
8-bit RGB.  The 24-bit mode is a sequential capture.  The 8-bit mode
can be passed directly through to the output for a real time display.

      The output section is designed to use the low order bit from
the video buffer as a keying bit.  If the keying mode is set and the
key bit in the buffer is set to a one, the pixel is displayed from
the video buffer.  The pixel is taken from the MICRO CHANNEL* if the
keying bit is zero. With this feature, the display may be a mixture
of the two video sources. *  Trademark of IBM Corp.