What exactly is the ICE module in digital amps?

I think I understand some aspects of pulse width modulation in digital amps (like a light bulb that turns/switches on and off at incredable speeds and increases its pulse widths to mimic signal volumn) but I am not familiar with the "universal patent" of the ICE module. What does ICE stand for, what does it mean and how does it work?

I am very interested in the new technology of digital amps and would love to learn more about this. Thanks in advance to everyone who can help to clarify this issue.

A happy and healthy new year to all.
Look at http://www.medicom.bang-olufsen.com/sw1022.asp

It explains what the technology is about and also has information about the first commercial implementation (the EAR Two).
It's where the CUBES are made to cool the amp down with.
I was asked to evaluate the sound by a manufacturer and didn't care much for it, but thought it would be great for rear channel or woofers.....It runs cool and is a small module for such a powerful amplifier.....
Bob: How "tiny" are these things and how much power were they doing ? Sean
Sean, Parasound send me a 250w unit about a year and a half ago to evaluate and recall the stereo board was maybe 6" x 8" and had a huge transformer that came separate and plugged into the board....Input and output jacks were on the board BTW.....Made everything sound like elevator music to me used with the rest of my system.....Imagine it would be fiddled with to get more out of it as most things can, but recall it didn't measure well either with higher order odd harmonics going out to channel five.....I saw limited use of the module as I said for woofers and rear channels and a conventional amp used for the main speakers.....No heat and little to make it run so you could have three of these in mono form in a five channel amp.....