What are the advantages of Blu ray video players? Is it available for families now?
Blu ray players use blue laser to read files on disk. Because the light wavelength is shorter, more compact discs can be read. So why is Blu ray able to read and write more compact discs? This is from the laser: laser writing with reading about, is a very precise, accurate to the limit, is the wavelength of light, the red light with a wavelength of 700 nm, and 400 nm blue light only, so blue laser can actually be a little more accurate, can read and write a 200nm only, and in contrast, red laser can only read and write 350nm, so the same CD, points, record information naturally much!
Blu-Ray Disk is a blue disc, is one of the next generation of DVD standard, leading to SONY and Toshiba, SONY, Matsushita, PHILPS as the core, and pioneer, Hitachi, Samsung, LG and other giants support. The storage principle for the groove recording method, using the traditional trench records, however realize storage and data management of larger capacity by shaking addressing more advanced, but has now reached 100GB. Compared with the traditional CD or DVD storage format, BD disk obviously brings better reflectivity and storage density, which is the key to the breakthrough of its capacity breakthrough. With the blue light is relatively HD-DVD camp, the original Toshiba has joined the Blu ray camp, but the distribution of benefits and related technical characteristics of Toshiba to categorically quit the organization and development of Advanced Optical combined with NEC Disk, and DVD-Forum support, renamed HD DVD. Since Blu ray DVD is not compatible with the current DVD format, it has directly increased the cost of transitioning to the Blu ray DVD production environment, thus greatly delaying the process of Blu ray becoming the next generation of DVD standards.
However, another major member of the DVD forum, Toshiba, has brought in a new AOD Disk (Advanced Optical) disk that is completely incompatible with Blu ray. Compared to the blue laser, the biggest advantage of the AOD technology introduced by Toshiba and NEC is that it can be compatible with the current DVD, and the production difficulty is much lower than the production of Blu ray DVD. The diameter of the Blu ray disc is 12cm, the same as that of the ordinary compact disk (CD) and digital compact disk (DVD). This CD-ROM video data by 405n blue laser in single monolayer CD recording and playback can be up to 27GB, more than the existing DVD capacity of 5 times (the capacity of DVD is generally 4.7GB), can record 13 hours or 2 hours of regular TV HDTV program. The Blu ray Disc MPEG-2 compression technology.
