Nikos, when the EX-SDI signal comes up the tether, it arrives at the SeeEyes receiver and is converted into HD-SDI on a coax cable. I do not know of any laptop that will accept coax HD-SDI so you will need some way to import the video, this is where the Magewell USB Capture device comes in.
In fact, not only will it import the the video, it also comprises an off-platform graphics processor so all the video processing is done at no expense to your laptop’s internal hardware. Furthermore, the accompanying software will display the video and record it at the same time. Magewell also have a very capable SDK for importing video into any custom app that you may want to write (useful for those who write their own ROV pilot software). And the Magewell hardware will integrate with just about any video software you can name. Phew!
Your choice of camera depends on the conditions in which you will use it, and whether your diver will be using dive lights. I suggested the Sony Starvis modules on the assumption that the camera vessel would not be fitted with lights but there are many, many other options. The best way to find one is start Googling, the criteria you need to watch out for are:
- HD (1080p, 30fps)
- HD-SDI output (preferably through a MMX coax connector)
- 12VDC supply voltage.
Often this will mean trawling through pages like this and downloading the datasheets. It’s time consuming but worth the effort when you find the right camera for your application.