Post by thread:[OT] On-screen display

Could anyone provide any information as to how to add text to a NTSC video signal? The only solutions I have been able to find only work with component signals. A PIC solution would be nice (16C74 preferably). Regards, Vince Deno

|Could anyone provide any information as to how to add text to a NTSC video |signal? The only solutions I have been able to find only work with component |signals. A PIC solution would be nice (16C74 preferably). Adding text to an NTSC display will require doing three things: [1] Detection of the incoming sync signal [2] Setting the DC offset of the incoming signal as appropriate [3] Switching between the incoming signal and your own. Although it's certainly possible to use discrete components to do the above functions, it may be easier to use a chip designed for on-screen display purposes. I think other people here have written of such devices.