blu-ray

Blu-ray Disc eller BD är ett format för digital lagring av stora mängder data, inklusive av HD-film och spel. Det är en utvidgning av DVD:n men med samma fysiska storlek. Formatet bildades 2002 av Blu-ray Disc Association (BDA) som bland andra består av Panasonic Corporation (Panasonic, Technics), Pioneer, Philips, Thomson, LG Electronics, Hitachi, Sharp, Samsung och Sony. The Blu-ray Disc Association (BDA) created a task force made up of executives from the film industry and the consumer electronics and IT sectors to help define standards for putting 3-D film and 3-D television content on a Blu-ray Disc. On Dec. 17, 2009 the BDA officially announced 3D specs for Blu-ray Disc, allowing backward compatibility with current 2D Blu-ray players. The BDA has said, "The Blu-ray 3D specification calls for encoding 3D video using the "Stereo High" profile defined by Multiview Video Coding (MVC), an extension to the ITU-T H.264 Advanced Video Coding (AVC) codec currently supported by all Blu-ray Disc players. MPEG4-MVC compresses both left and right eye views with a typical 50% overhead compared to equivalent 2D content, and can provide full 1080p resolution backward compatibility with current 2D Blu-ray Disc players." This means the MVC (3D) stream is backward compatible with H.264/AVC (2D) stream, allowing older 2D devices and software to decode stereoscopic video streams, ignoring additional information for the second view.