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.