B/2 Europe, Greenland, French colonies, Middle East, Africa, Australia and New Zealand
C/3 Region India, Nepal, Mainland China, Russia, Central Asia and South Asia
There are a lot of BD movies in the whole district, and the regional logo is optimistic before buying.
Blu-ray Disc, translated into Blu-ray Disc in Chinese, is the next-generation disc format for DVD discs. In the case of human beings' increasingly strict quality requirements for multimedia, it is used to store high-quality audio and video and high-capacity data storage. Its current competitor is HD DVD, which has different company support and wants to be a standard specification. Blu-ray is named after its laser wavelength of 405 nanometers (nm), which is just the blue light in the spectrum, hence the name. (DVD uses a 650nm wavelength red light reader, CD uses a 780nm wavelength).
The Blu-ray Disc Founders group consists of 13 members: Dell, HP, Hitachi, LG Electronics, Panasonic, Mitsubishi, Pioneer, Philips, Samsung Electronics, Sharp Electronics, Sony, TDK and Thomson.
The Blu-ray Disc Alliance was originally scheduled to release its product at the Consumer Electronics Show in January 2006. Later, in the process of developing Blu-ray technology, Sony considered it necessary to take some additional measures to cooperate, and announced that it would postpone the release date of PLAYSTATION 3 to 2006. November of the year. Relevant members of the Blu-ray Disc Alliance also postponed the release date of Blu-ray related products until June 30, 2006.
Variations and Size A single-layer Blu-ray Disc 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 up to 8 hours. The capacity is 100 or 200GB, which is 4 and 8 layers respectively. According to the current research, TDK has announced the development of a 4-layer disc with a capacity of 100GB.
The Blu-ray player uses a blue laser to read the files on the disc. Due to the shorter wavelength of the blue light, a denser disc can be read. So why can Blu-ray read and write denser discs? This should be discussed from the laser: the laser for reading and writing is a very accurate light, accurate to the limit, that is, the wavelength of light is generally, because the red wavelength is 700 nm, and the blue light is only 400 nm, so the blue laser actually Can be more precise, can read and write a point of only 200nm, in contrast, the red laser can only read and write 350nm points, so the same disc, more points, the information recorded naturally more!
Blu-Ray Disk is a Blu-ray Disc, one of the next-generation standards for DVD. The main players are Sony and Toshiba. Sony, Panasonic and Philips are the core, and they are supported by giants such as Pioneer, Hitachi, Samsung and LG. The storage principle is a groove recording method, which uses traditional grooves for recording. However, with more advanced dither addressing, it realizes storage and data management for larger capacity, and has now reached a stunning 100GB. Compared to traditional CD or DVD storage formats, BD discs clearly bring better reflectivity and storage density, which is the key to achieving capacity breakthrough. Opposite to Blu-ray is the HD-DVD camp. Originally, Toshiba has joined the Blu-ray camp. However, the distribution of interests and related technical features have tempted Toshiba to withdraw from the organization, and jointly developed NEC to develop Advanced Optical Disk, and received support from DVD-Forum. , renamed to HD DVD. Since the Blu-ray DVD is incompatible with the current DVD format, it directly increases the cost of the manufacturer's transition to the Blu-ray DVD production environment, thus greatly delaying the process of Blu-ray becoming the next-generation DVD standard. However, Toshiba, a major member of another DVD forum, has brought a new technology AOD (Advanced Optical Disk) disc that is completely incompatible with Blu-ray. The biggest advantage of AOD technology jointly developed by Toshiba and NEC compared to blue laser is that it can be compatible with current DVDs, and it is much less difficult to produce than Blu-ray DVDs. The Blu-ray disc has a diameter of 12 cm and is the same size as a normal disc (CD) and a digital disc (DVD). This kind of disc can record and play up to 27GB of video data on a single-sided single-layer disc using a 405n blue laser, which is more than 5 times larger than the capacity of the existing DVD (the capacity of the DVD is generally 4.7GB), and can be recorded. 13 hours of regular TV shows or 2 hours of high definition TV shows. Blu-ray Disc uses MPEG-2 compression technology. Bluerayicon.jpg (8.11 KB)
2009-11-13 10:27 PMDVD partition
In order to prevent piracy, the International DVD Alliance should add the regional code to the DVD-Video disc and the regional code recognition mechanism on the DVD player at the request of the American Film Institute and the Consumer Electronics Manufacturers Association headed by eight major Hollywood companies. In this way, the disc can be played only when the area recognition mechanism of the DVD machine coincides with the area code attached to the DVD disc.
The result of the partition is to divide the world into six zones:
District 1: The United States, Canada, and the Eastern Pacific Islands.
Second District: Japan, Europe, West Asia, Arabia, Egypt, South Africa,
Greenland.
The third district: Taiwan, Hong Kong, South Korea, Thailand, Indonesia and other Southeast Asian countries,
East Asia.
Fourth District: Central and South America, Australia, New Zealand, South Pacific Islands.
District 5: Africa, the Indian Peninsula, Central Asia, Mongolia, the former Soviet Union,
The sixth district of Russia, Mongolia, Eastern Europe, North Korea, North Africa and Northwest Asia: China.
In theory, a DVD disc released in the United States cannot be played on a DVD player sold in China. For this reason, some DVD manufacturers have made research and operation on the machine in order to win the selling point of the whole machine, so there is a so-called "wide-area DVD" promoted by the manufacturer.
The partition system mentioned above is set to prevent piracy, but the zoning system has existed in name after the DVD entered the majority of the family. All DVD players are now full of the area code no longer exists to correspond to the area code to play, now the area code Can only be used as a reference for picture quality and sound effects.
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