Blu-ray Disc Association The Blu-ray Disc Association (BDA) has announced the Ultra HD Blu-ray (4K) specification is now complete and has also revealed the next-gen format's official logo.

Blu-ray Disc™ and Ultra HD Blu-ray ™ are trademarks owned by the Blu-ray Disc Association (BDA) and licensed for use on discs, players and other products that use BDA’s optical disc format ...