Buffer Mechanism for Pel Positioning of Multiple Video Images on a Raster Scan CRT
Original Publication Date: 1983-Dec-01
Included in the Prior Art Database: 2005-Feb-08
This buffer mechanism allows individual positioning of multiple video images at any pel (picture element) position on the screen of a raster-scan CRT. This is accomplished by providing, in addition to the standard regeneration buffer, a second buffer which stores information units called video data elements a short time before they begin to be displayed and retains them only so long as they are needed for display. The buffer mechanism has three parts: the Loader, the Buffer and the Displayer. The Loader puts information into the Buffer, and the Displayer takes it out. The information being managed describes a video image in terms of video data elements. The information in each video data element is the image origin OI and image height HI, if it is variable.