HD+DVD

=**HD DVD** = ​​​ An HD DVD is a disc formatted to store High definition: 
 * Videos
 * Videos which are Blu-Ray.
 * Games
 * Play Station 3, Xbox 360 and Wii.
 * Capacity**
 * **15 GB (single layer) **
 * **30 GB (dual layer) **



=**High definition and Blu-ray **=

A system of higher video resolution, than the Standard Definition (SD) commonly involves resolution of 1280×720 pixels (720p) or 1920×1080 pixels (1080i/1080p). Blu-ray (also known as **BD** ) is a storage medium designed to supersede the standard DVD format. Widely used on Play station 3 games, Xbox 360, Wii and Videos.

Capacity: **
 * 


 * **25 to 50 GB (single-layer)**
 * **50 to 100 GB (dual-layer)**