Blu-ray Disc is derived from the blue-violet laser used to read and write this type of disc. Cause Blu-ray disc shorter wavelength (405 nm), substantially more data can be stored on a Blu-ray Disc than on the DVD format, which uses a red, 650 nm laser. A single layer Blu-ray Disc can store 25 gigabytes (GB), over five times the size of a single layer DVD at 4.7 GB. A dual layer Blu-ray Disc can store 50 GB, almost 6 times the size of a dual layer DVD at 8.5 GB.Blu-ray Disc is similar to PDD, another optical disc format developed by Sony (which has been available since 2004) but offering higher data transfer speeds. PDD was not intended for home video use and was aimed at business data archiving and backup. Blu-ray is currently in a format war with rival format HD DVD.The Blu-ray Disc system uses a blue-violet laser operating at a wavelength of 405 nm, similar to the one used for HD DVD, to read and write data. Conventional DVDs and CDs use red and infrared lasers at 650 nm and 780 nm respectively. BD-ROM specification defines four profiles of Blu-ray players. All video-based profiles are required to have a full implementation of BD-J.BD-ROM Blue-ray Disk-Read Only Memory, BD-ROM is a type of drive capable of reading Blue-ray discs. Blu-ray Disc (BD) is a next-generation optical disc format meant for high-density storage of high-definition video and data.Data storage High-definition video
Blu-ray Disc is derived from the blue-violet laser used to read and write this type of disc. Cause Blu-ray disc shorter wavelength (405 nm), substantially more data can be stored on a Blu-ray Disc than on the DVD format, which uses a red, 650 nm laser. A single layer Blu-ray Disc can store 25 gigabytes (GB), over five times the size of a single layer DVD at 4.7 GB. A dual layer Blu-ray Disc can store 50 GB, almost 6 times the size of a dual layer DVD at 8.5 GB.Blu-ray Disc is similar to PDD, another optical disc format developed by Sony (which has been available since 2004) but offering higher data transfer speeds. PDD was not intended for home video use and was aimed at business data archiving and backup. Blu-ray is currently in a format war with rival format HD DVD.The Blu-ray Disc system uses a blue-violet laser operating at a wavelength of 405 nm, similar to the one used for HD DVD, to read and write data. Conventional DVDs and CDs use red and infrared lasers at 650 nm and 780 nm respectively. BD-ROM specification defines four profiles of Blu-ray players. All video-based profiles are required to have a full implementation of BD-J.BD-ROM Blue-ray Disk-Read Only Memory, BD-ROM is a type of drive capable of reading Blue-ray discs. Blu-ray Disc (BD) is a next-generation optical disc format meant for high-density storage of high-definition video and data.