[laarc]

jpg2000 is unfortunately encumbered by patents. I was going to use it for a certain project a long time ago, but had to abandon the idea due to that. It's a shame, because many of the ideas in jpg2000 are very valuable for the world.

[Houshalter]

Some of these compression patents are expiring now. I don't know if they were ever enforced to begin with. The wikipedia page is confusing, but suggests that the JPEG committee got the relevant patent holders to agree to let the patents be used freely.