VITC Timecode from 3G-SDI video feed

deckard26354

Hi,

I am planning to use the propeller Activity Board WX to extract, decode and display on an OLED display the VITC timecode embedded in the vertical blank interval of a 3G-SDI signal.

I have been told that I should:
1/ amplify the 3G-SDI signal from the BNC connector to shift it to a range where it can be detected as a digital signal by the Propeller.
2/ use a comparator to only consider the timecode part of the signal and ignore the rest.

I am totally new to electronic and microcontrollers so I don't know where to go from here.

Has anyone attempted anything similar?

Thanks a lot.

Ltech

I do not believe you can make this happend with a P1

3G-SDI is 3Giga bits per second serial stream (2.970 Gbit/s, and 2.970/1.001 Gbit/s)
You have to isolate some digital lines in the video, it is way to fast.
You have some dedicated IC for those tasks
In analogue video, it would be possible

If you mean LTC, it is the analogue audio timecode, it is possible

deckard26354

Thanks for your reply Ltech.

I know that Jack Buffington (Robot Brigade) managed to to do it, but probably with lower bitrate SDI (HD-SDI or even SD-SDI). He also added LTC decoding but I am moslty interested in VITC.

What IC do you think would work?

Brian Fairchild

Even SD-SDI runs at 270Mbits/s. You are going to need some external helper chips.