About Blu-ray Disc
Blu-ray Disc is a next generation disc format developed by Sony. Built from the ground up, Sony wanted its format to be more than simply an extension of the DVD format. Blu-ray supports three video codecs (AVC, VC-1 & MPEG-2), a plethora of audio codecs, and approximately six times the storage capability of standard definition DVD. Blu-ray technology is in a state of flux as it boasts no less than three different specifications (Profile 1.0, 1.1, and 2.0). Each profile contains its own set of features and capabilities, with picture-in-picture (PiP) support starting in Profile 1.1 and network connectivity in Profile 2.0. These profile upgrades are being adopted by hardware manufacturers gradually over time. Certain players may or may not be upgradeable, leaving early adopters with potentially obsolete players.
Blu-ray has two layers of interactivity: a basic layer called HDMV and a more advanced layer called BD-J. HDMV authoring has some similarities to standard definition authoring but also allows for advanced features such as pop-up menus and high quality subtitles. BD-J is built using the Java platform and offers a wide range of advanced features including network access and interactive applications. Currently, most Blu-ray titles coming out of Hollywood are authored using HDMV, however, the hardware support has progressed to the point where BD-J is being incorporated into a number of Hollywood discs. As new players enter the market, BD-J will likely become the standard for all but the most simple discs.
Blu-ray Disc can be burned onto writable media called BD-R. Because the media and burners are readily available, Blu-ray is a good option for small runs of titles and controlled uses such as tradeshows and demonstrations. Playback of BD-R media in setop players requires the latest hardware firmware updates. Be sure that your player is up to date to ensure compatibility.
