check out the specs
This is what HDMI is capable of:
"A single HDMI link, on the other hand, is capable of transferring up to 24 bits of user data at 165 Mpixels per second, resulting in a massive bandwidth of nearly 4 Gbps. This is enough to support the 1080p resolutions of today’s newest high-definition displays while still leaving room to transport up to 8 channels of high-resolution audio with 24 bits of resolution and a sampling frequency up to 192 kHz – all across a single HDMI cable."
This is a quote taken from an overview on HDMI right here at audioholics. You can read more here:
http://www.audioholics.com/techtips/specsformats/HDMIinterfaceguide.php
Remember, this is what HDMI is capable of, not necessarily what has been implemented at this time.
