Introduction
Laser, read-write, is a very accurate light, accurate to the limit, is general, because the red light wave is 700 nanometers, and Blu-ray is only 400 Nano.
Historical Development
Development History
In 1998, Philips and Sony took the lead in expressing the technical papers of the next generation disc, and launched a single-sided single-layer implementation. 23GB ~ 25GB technical solutions have brought a surprise to the industry.
February 19, 2002, Sony, Philips, Panasonic is the core, Joint Hitachi, Pioneer, Samsung, LG, Sharp and Tomson released a 0.9 version of Blu-rayDisc (BD) technology standard. Blu-ray is the meaning of Blueray, so February 19 also officially shows the birth of the next generation DVD candidate - Blu-ray disc.
BD Group Subsequently issued a BD specification version 1.0 version, a total of $ 5,000, which marked that the design of BD has been completely established.
Although the BD and HD-DVD will have the controversy that will be the next generation of Blu-ray storage standards, this has also prompted two constantly moving new and technical reforms. In 2003, the Blu-ray laser head reached the production level, but the Blu-ray products suitable for the market began to appear in 2006.
2006, Sony, Pioneer, Samsung, etc. have released their Blu-ray technology and blue products, and they all put forward their own Blu-ray programs. In the Chinese market, July 19, 2006, BenQ's first blue product has been introduced. It can be said that in 2006, it was a "Blu-ray First Year" in the true sense.
February 16, 2008, the headline news reported by the Japanese NHK TV station reported a shocking message: Toshiba announced the abandonment of HD-DVD format. In the news program, Toshiba announced completely failure in this "Miginal DVD Specification War", and lost tens of billion yen. At the same time, Reuters Tokyo Branch also published "Toshiba Abandoned HD-DVD, End Format War".
From Microsoft, which only supports HD-DVD, it supports both formats, to the previous period, the HD-DVD camp Warner flies, Toshiba Leading HD-DVD camp can be said to be more and more difficult, today Even Toshiba announced the abandonment of HD-DVD format, which lasted for several years of dispute, and finally ended with Blu-ray victory.
opponent analysis
and Blu-ray relative to the HD-DVD camp, the original Toshiba has added Blu-ray camp, but the distribution of interests and related technical features induce Toshiba to withdraw from the organization, turn And combined with NEC development Advanced Optical Disk, and gets DVD-Forum support, renamed HD DVD. Since the Blu-ray DVD is not compatible with the current DVD format, it is directly increasing the cost of the manufacturer to transition to the Blu-ray DVD production environment, which greatly delayed the process of the next generation of DVD standards. However, another DVD Forum's main member of Toshiba brings a new technology AOD (Advanced Optical Disk) disc that is completely incompatible with Blu. The AOD technology jointly launched by Toshiba and NEC is compared to the blue laser advantage in being able to comply with the current DVD, and in terms of production difficulty, it is much lower than the production difficulty of Blu-ray DVD.
Types
2007, Sony launched the first high-definition player in China: BDP-S300 / BM Blu-ray player opens Blu-ray commercialization in China Application, the proud results obtained in the previous PlayStation 3 laid the foundation for Blu-ray and HD-DVD standard battle, but this DVD up to 5000RMB's price makes numerous consumers. The cost of the cost makes BlueRay have a long way to go.
BDP-S300 / BM Blu-ray Player Performance Standard
7.1 Surround Sound
1080 Signal Output
24 frames per second Movie-like play frame
xvCOLOUR color gamut standard
Bravia theater Sync Theater synchronization function
related changes
a single layer The Blu-ray CD has a capacity of 25 or 22GB, enough to burn a high-definition movie for up to 4 hours. The double layer can reach 46 or 54GB capacity, enough to burn a high-definition movie for 8 hours. The capacity is 100 or 200 GB, which is 4 layers and 8 layers, respectively. In the study, TDK has announced its research to develop a 4-layer capacity of 100GB. Blu-ray discs are files on a blue laser read. Due to a short blue wavelength, you can read a larger CD. So why is Blu light to read and write a larger CD? This is to talk from the laser: the laser that is read and written is a very accurate light, accurate to the limit, is general, because the red light wave is 700 nm, and the blue light is only 400 nm.
blu-ray disk is a blue-disc, one of the next generation of DVD, the leader is Sony and Toshiba, Sony, Panasonic, Philips is the core, and has a pioneer, Hitachi, Samsung, LG Waiting for the support of the giants. The storage principle is a trench recording mode, which is recorded using a traditional trench, but through a more advanced screaming addressing, the storage and data management of greater capacity has been achieved, which has reached a thrilling 100GB. Compared to traditional CDs or DVD storage forms, BD discs obviously bring better reflectance and storage density, which is the key to achieving capacity breakthroughs.
The diameter of the Blu-ray disc is 12 cm, and the size of the normal optical disc (CD) and digital disc (DVD). This type of disc uses 405N blue lasers to record on a single-sided single-layer optical disk, playing up to 27GB of video data, more than 5 times larger than the existing DVD (the capacity of DVD is usually 4.7GB), can be recorded 13-hour normal TV program or 2 hours high definition TV program. Blu-ray disc uses MPEG-2 compression technology.