AT&T says that it possesses several patents related to video compression, which are an essential component of the MPEG-4 video technology.
AT&T claims it can prove that the infringements have taken place and will seek damages including lost profits, royalties and attorneys' fees.
All of the companies are involved editing video content, and Apple with its new video-enabled iPod, is a high-profile target.
Pentax and Nero have all bought licenses from AT&T to make its lawyers go away.
So far Apple has not commented on the yarn and the others seem a bit surprised at AT&T's action.
More at PC Magazine, here. µ
Sign up for INQbot – a weekly roundup of the best from the INQ