Blu-ray Disc is the next generation
optical media format.
Each disc, same size as a regular DVD, can produce a
progressive video image resolution of up to 1920 x 1080 (known as 1080p) for truly fantastic and sharp visuals. Blu-ray also offers a significantly higher data transfer rate (DTR) than television HD broadcasts for an improved picture presentation. Currently Blu-ray can store 25GB of data on a single layer which means that dual layer discs can harbour a potential 50GB of HD content.
Regular dual layer DVD is only able to present 9GB of SD content. Blu-ray Disc have Region
Coding.
Imposed by the film studios due to the staggered theatrical release of movies worldwide and to protect exclusive markets, region coding was designed as a method of ensuring discs would be playable only in certain geographical locations.