The manufacturing process of the DVD is done very carefully, so that birefringence could be avoided. Recording layer formed between the two panes, which are added together then glued. Injection molding process in blu-ray disc format is performed on a single plate of 1.1 mm. Therefore, this is helping to reduce production costs. This cost saving in Blu-ray Disc format is similar to the additional costs on the protective layer.
In comparison with the DVD drive, the transmission rate is in blu-ray disc format is much faster. The transmission rate of DVD format is 10 MB / s, while that of blu-ray disc format is 36 MB / s 25GB material can be recorded on a single side of the Blu-ray DVD disc. Initially, the read-only formats of CD and DVD drives were introduced. Then the rewritable and recordable formats were introduced. The different formats of Blu-ray is BD-R (recordable) and BD-RE (rewritable), BD-RW (rewritable) and BD-ROM (read-only). BD-R and BD-RW is ideal for PC data storage while the other formats BD-ROM and BD-RE has been specifically designed for pre-recorded content and HDTV recordings respectively. New blue-violet laser is inserted into the blu-ray optical disc standard, while DVDs and CDs will be used in red laser to read and write data.
So with the same amount of surface space as the DVD, the Blu-Ray Disc hold huge amounts of data (25GB on a single layer). Blu-ray name was given in this media format on the basis of its blue laser. The blu word came from the blue-violet diode, while the other word from the optical ray beam was made. The letter e was dropped and a brand new Blu-ray has been registered. Bluray DVD drive is also known as BD. Blu-ray Disc format was developed so thatRewriting, recording and playback of high-definition HDV video. Blu-ray recordable DVD disc can hold huge amounts of data.
Blu-ray Disc Association is the founder of the blu-ray technology, and now the world’s membership of this association are nearly 180 companies. Blu-ray Disc Association Board of Directors is Sony Corporation, HP, Apple Computer, Dell, LG Electronics, Matsushita Electric Industrial Co., Hitachi Ltd., Pioneer Corporation, Mitsubishi Electric Corporation, Samsung Electronics, Royal Philips Electronics, Sun Microsystems, Sharp Corporation, Twentieth Century Fox, Warner Bros. Entertainment, Thomson Multimedia, Walt Disney Pictures and TDK. Combo drives for high-definition DVD is also available, one side consists of standard DVD, while the other side is the high-definition HD. All video formats including MPEG-4/AVC, VC-1 and MPEG-2 are supported by the Blu-Ray Disc format.
Capacity of standard DVD drive is 4.36 GB and the capacity of single layer BluRay disc is approx. 25 GB. A dual-layer Blu-ray holds 50GB of data. All major audio codec types are supported by the BD Blu-ray format, including eight channels of audio (un-compressed). The audio codecs by the Blu-Ray Disc format also supports Dolby Digital (DD), DTS Digital Surround, DTS-HD Master Audio, Dolby TrueHD, High Resolution Audio, Dolby Digital Plus (DD +), LPCM (Linear PCM).
Please Buy Sony NSZ-GT1 now with discount!