Colour video signals control circuit for a high resolution visualization system, and visualization system comprising such a circuit

Abstract

Abstract 1. A colour video signal control circuit for a high resolution display system, controlled by a picture storage (1), in which the aspect of each picture pixel is encoded by means of an aspect word of several bits, comprising : - a transcoding table storage (2) containing codes associated with a scale of colours and addressed on reading by the aspect word associated with each point to be displayed on the colour screen (4) of this circuit, - digital-to-analog converters (31, 32, 33) receiving each a part of the code read out of the transcoding storage at the address defined by the aspect word, and each delivering a primary colour signal as a function of this code to the screen (4), characterized in that the control circuit further comprises : - a set (5) of table buffer storages (51, 52, 53, 54) initially loaded by other codes associated with other scales of colours, and - a control circuit (7) receiving the screen scanning return signal (SYT) as well as blinking signals (HC1 , HC2 ), the contents of each table buffer storage being susceptible to be transferred into the transcoding table storage (2) during a return period of the picture scanner under control of the control circuit (7).

Inventors

• 👤 Philippe Ligocki
• 👤 Dominique Caignault

Bibliographic Details