DEVICE FOR MIXING TV IMAGE WITH A TEXT

摘要

The invention refers to a device for mixing TV image with text, which consists of a mixer (2) that receives video signals of text and a command voltage from a programmable automaton (4), a contrast command signal from a control panel (7). The programmable automaton is commanded by a microprocessor (12) through digital signals of horizontal and vertical synchronization. These impulses command both the triggering of an internal tact necessary to scan a character generator contained in a ROM memory (17), as well as a RAM memory (18) containing commands for the generation of a text which are inscribed in it through an interface (19) from an external computer with its own tact.<IMAGE>