Aurora says the DXE-STH and DXE-HTS are professional broadcast video products capable of converting 3G-SDI to HDMI and HDMI to 3G-SDI, respectively. The DXE-STH supports audio de-embedding, while the DXE-HTS supports audio embeddeding.
The DXE-STH has a re-clocked loop-through SDI for local monitor support and can also identify the input signal (HD or SD), indicating the result with a dual color status LED. RGB and YUV color space are also supported. Both units support resolutions from 480i up to 1080p.
Here are all the specs: http://auroramultimedia.com/?section=products&id=230