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.
america
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).
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.....