Other SDI standards are SD-SDI, ED-SDI, HD-SDI, Dual Link HD-SDI and 3G-SDI. The main purpose of SDI converters is to convert the SDI signal to a different standard including DVI, HDMI, component, S-Video, composite or to other SDI standards or vice versa. SDI converters are typically needed when an application is working with different components.
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![Hd sdi to hdmi converter Hd sdi to hdmi converter](http://www.networktechinc.com/images/3gsdi-hda.jpg)
May 9th, 2006, 08:33 AM | #2 |
Trustee Location: Milwaukee, WI | That is because with 720p there isn't really any other framerate other than 60p or 50p. All other franerates are embedded in a 60p or 50p stream. With a camera like Varicam there is metadata with the stream that indicates which frames to throw away during capture. With an analog to SDI converter there is no way to transfer that metadata so the only option is to have 60p or 50p. 30p is fairly easy because all it does is drop every other frame. No matter how it does it it would turn out ok. In theory 25p should also work but since it isn't a written in stone european format it isn't there yet. As far as I know you will never ever see 24p in a analog to SDI converter. The trick is once you get the 60p stream on your hard drive you have to remove the extra frames. I am writing a free program for the PC to do this. The Decklink products do say they capture 720p at 24p but I think that is with the metadata. I could be wrong on that one however. If it does work it is because you have an advanced device there working on trying to figure out which frames are duplicates and it removes them during capture. Again I'm not sure about the Decklink products because the moron people at Blackmagic ignore every question I ask them. |