Electronics > Beginners

Generating Analog Video

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bopstar:
Im now more interested in generating video with chips / microcntrollers of the Atmel AVR 8bit Family

BradC:

--- Quote from: bopstar on October 19, 2018, 06:33:58 am ---I would like to sync two analog video signals for the first part of my video mixer project. the signal will the have their sync stopped and use the video signal part for modifying and effects. then the sync will be reinserted to produce the output. would anyone know where i could get help with this.

Kind regards,
Justin Harris

--- End quote ---

Have you re-read all the information given to you in your Genlocking, Analog Sync and Analog delay lines threads from January?

bopstar:
I have. and none of it gave me much to work with. that is why i have renamed this thread on Generating Said Video

BradC:

--- Quote from: bopstar on October 19, 2018, 08:23:37 am ---I have. and none of it gave me much to work with. that is why i have renamed this thread on Generating Said Video

--- End quote ---

Generating video is easy. Sycnronising it isn't.

Perhaps having a look at some of the items in the Parallax Object Library where people use the Propeller to overlay video on composite streams might be a place to start.

When I was a kid I built a genlock to lock an Apple ][ to a composite signal from the back of a tuner and put that into a basic video mixer with fade and wipe. From memory the video effects doo-dad was an old EA project. I recall buying the blank board from RCS by mail order. Anyway, by removing the colour burst oscillator on the Apple ][ it worked in a basic fashion to overlay B&W onto a composite stream, but not very well. As I grew up and met some broadcast engineers I started to understand why.

I also tried to build a Genlock for an old Philips VCR as I had the full service manual with schematics. It was then I started to understand why they used line-stores when genlocking video.

Good times.

bopstar:
i have used a propeller i like them but i want to make use of my expensive ATMEL ICE with some AVR's

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