Technology, especially in electronics and disc technology is developing at a dazzling speed. Now we have Blu-ray versus DVD, blue laser technology versus red laser used for our DVDs. It seems that the term ‘DVD’ standing for Digital Versatile Disc will be replaced by the term ‘BD’ standing for Blu-ray Disc. It has already begun entering our lives as well as our terminology.
When we take a look at its advantages, the storage capacity of this next-generation format BD is five times more than DVD format. The capacity of a single layer is 25GB and dual-layer has 50GB capacity. Blu-ray provides read-only (BD-ROM), recordable (BD-R) and rewritable (BD-RE) formats. A dual-layer can contain 9 hours of high definition video. It supports all the codecs that DVD format supports and in addition, it supports Dolby True HD, DTS-HD and DTS Digital Surround audio codecs and MPEG-4AVC and SMPTE VC-1 video codes. Early Blu-ray disc players didn’t support Dolby True HD, but most of the current models support it and most of the blu-ray movie releases feature Dolby True HD audiotrack. The video bit rate is maximum 40.0 Mbps while DVD has only 9.8 Mbps video bit rate.
