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Information, Knowledge and Communication
Informational Series
Theme: DVD
DVD, short for Digital Video Disc or Digital Versatile Disc, in Portuguese, Digital Disc Video or Digital Versatile Disc.
Contains digital information, with a greater capacity storage of the CD, due to a technology superior optics, and improved standards of data compression. The DVD was created in 1996.
In early 1990 two types of discs, high capacity optical were in development: one was the MultiMedia Compact Disc (MMCD), backed by Philips and Sony, the other was the Super Density Disc (SD), sponsored by Toshiba, Time-Warner, Panasonic, Hitachi, Mitsubishi, Pioneer, Thomson and JVC.
The president of IBM, had the proposal to unite the two systems, avoiding the problems of the decade 1980, VCRs VHS and Betamax formats.
Philips and Sony abandoned their MMCD format and agreed with the Toshiba's format with two modifications relating to technology implicated. The first was the geometry that allows "push-pull" bands, which was a joint technology from Philips, Sony.
The second was the adoption of Philips' EFMPlus. The 'EFMPlus was created by Kees A.
The FSM is 6% less efficient than the SD system Toshiba, which resulted in a capacity 4.7 GB instead of the original 5GB SD.
The great advantage is its great resilience 'EFMPlus and weather resistance such as scratches and fingerprints. The result was the DVD 1.5 announced the public in 1995 and completed in September 1996.
In May 1997, the Consortium has changed for DVD DVD Forum, which is open to all companies.
The first DVD players and discs were available in November 1997 in Japan, in March 1998 in the United States, 1999 in Europe and 2000 in Australia. In Brazil technology began to gain momentum in 2002 and 2003.
The first film released on DVD in Twister was the United States in 1996.
The film was a test for the Surround Sound 2.1. In Brazil, the first DVD movie was an Era time in America, FlashStar launched in 1998. In 1999 the price of DVD players dropped to $ 300.
The supermarket chain Wal-Mart began selling DVDs Players even with little demand compared with the VHS videos, but soon other stores have followed Wal-Mart DVD and quickly became popular in the United States.
Due to the devaluation of Brazilian currency relation to the dollars and the delay in deciding the region to be adopted in Brazil and other factors, the DVD became popular in Brazil in 2003,
taking nearly 80% of the videos. A delay almost a year, according to manufacturers in the industry.
DVDs are by default the ability to store 4.7 GB of data, while a CD holds on average 700 MB may even reach 800. The so-called DVD Dual-Layer can store up to 8.5 GB.
Noting the file extensions on a computer can see: Arquivos.IFO: information, scripts are about "how to" turn the DVD; Arquivos.BUP: are backups of the *. IFO;
Arquivos.PUO: are prohibited user operations and are usually removed when ripamos. Arquivos.VOB: contains the whole movie, menu, extras, languages and subtitles, through multiplexing.
Region codes are given on the date of launching a film vary from country to country, so that the public buy a movie before it is displayed in the theater their country and as a protection of that market, DVD publishers have divided the world into six zones.
Thus, for example, edited a DVD in one zone can not be read by a DVD zone 2. There is, however, a wide variety of readers that allow multi-zone view the DVD, regardless of the region to belong.
* 0: No encryption, read in all regions. * 1: U.S., Canada and U.S. territories * 2: Western Europe, Greenland, South Africa Lesotho, Swaziland, Japan, Egypt and the Middle East
* 5: Russia, countries of the former Soviet Union, Eastern Europe, sub- India, Mongolia, most African countries * 6: * People's Republic of China 7: Reserved for future use * 8: Using international such as airplanes, cruise ships, etc..
DVDs will not only allow a rewritable recording, not being able to delete anything after, adding data is only possible if the disc is not finalized, while the DVD rewritable allow erase and rewrite data.
Types of Non-Rewritable DVDs are: DVD-R, DVD + R and DVD + R DL. The types of Rewritable DVDs are: DVD-RW, DVD + RW, DVD + RW DL and DVD-RAM.
The DVD player is a device capable of playing home media in DVD format. Some today also reproduce other formats such as CD, VCD, SVCD, mini-CD, and DVD-RAM discs of data, for example, movies in *. avi format.
There are also the "DVD-KARAOKE," but these have inputs for microphones. There are DVD players with USB ports so that he could insert any MP3 or MP4. 30 00:08:00:022 --> 00:08:11,022 You can also view DVDs on personal computers, using a reader, DVD and software or DVD player program, such as
Windows Media Player, WinDVD or PowerDVD, for Windows operating system, and MPlayer, VLC, Xine Totem or for GNU / Linux and BSD derivatives.
Were launched two new technologies to replace the DVD with greater capacity storage. Are Blu-ray and HD DVD.
These formats use a different disk, that is recorded and reproduced with a laser blue-violet instead of the traditional red.
The blue laser has a shorter wavelength, allowing the establishment of a spiral higher in disk, which can yield up to 50 GB and 30 GB capacity in the case of Blu-ray and HD DVD, respectively.
Blu-ray has more capacity than HD-DVD between other features, ended up being the replacement for DVD.
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