According to this, apparently not since cable attenuation is compensated...but then there's the cryptic note at the end so I'm not sure.
Audioholics: Did any cabling or tolerance parameters change for the specification?
HDMI 1.3 increased the single-link bandwidth from 165MHz (or 4.95 gigabits/second) to 340MHz (or 10.2 gigabits/second). This was accomplished through the addition of receiver cable equalization, which is technology present in the HDMI receiver chip (in the display) that compensates for the signal deterioration caused by cables. In addition, source pre-emphasis (which emphasizes bit transitions) and source termination (which minimizes noise generation by the connectors) are now permitted for higher speed devices.
Editor's Note: If you thought the HDMI cable market was expensive, and frankly unreliable in passing 1080p without Deep Color over distances longer than 30 feet, we can't wait to see the mess that arises out of this new format. Thought that cable you sealed up in your home theater wall or ceiling was sufficient? Guess again. Cable EQ boxes will help, but the industry is somewhat reeling in shock at present over a new format with some features that, frankly, no one really asked for.
