DVD Full Form

The abbreviation for DVD is Digital Video Disc, which also can be called the Digital Versatile Disc. In this disc, the digital optical disc data is stored in a format that has been invented and was released later in 1996. The medium in which digital data is stored was widely used for software and other computer files, as well as this, was stored for video programs, they were watched using the DVD Players. DVDs have higher storage capacity than compact discs even if they both have the same dimensions.  

Pre-recorded DVDs were produced in mass using the molding machines that physically stamped data onto the DVD. These discs are a form of DVD-ROM as this data can only be read and cannot be written or erased. The blank recordable DVD discs can also be recorded using a DVD recorder which will function as a DVD-ROM. The rewritable DVDs can be recorded and also erased a number of times.  

DVD Full Form 

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The full form of DVD is digital video disc or digital versatile disc, this is a type of optical disc which is used for storing the data and this has been used as a platform for multimedia. The most prominent commercial application of DVD is for playing back recorded motion pictures and television programs thus “Digital video disc” is the appropriate name here. Though this is read-only and recordable, and this is even erasable and can be rewritable versions which can be used on personal computers as well. The PCs or the Personal Computers are used to store large quantities of literally any kind of data, this justifies the name for “digital versatile disc”.

Commercialization of DVD

The DVD represents the second generation of the compact disc, abbreviated as the CD. Soon after the release of the first audio CDs by the companies – Sony Corporation and Philips Electronics NV in the year 1982, the research was underway on storing the high-quality video on the same 120-mm (this is 4.75-inch) disc. 

In 1994–95 two competing formats were introduced, the Multimedia CD (MMCD) of Sony and Philips and the Super Density (abbreviated as SD) disc of a group which is led by the Toshiba Corporation and by the Time Warner Inc. At the end of 1995, these competing groups later had agreed on a common format, this is to be known as DVD, which combines the elements of both the proposals and in the year 1996 the very first DVD players went for sale in Japan.

Workings of a DVD

Just like a CD drive, a DVD drive is also used by a laser to read the digitized which is the binary form of data and has been encoded onto the disc. It is mainly in the form of tiny pits that trace a spiral track occurring between the center of the disc and towards its outer edge. However, as the DVD laser emits the red light at the shorter wavelengths than the red light of the CD laser (this is 635 or 650 nanometres for the DVD, this is contrasted to 780 nanometres for the CD), it is able to resolve the shorter pits on more narrowly spaced tracks, this allows for greater storage density. 

Additionally, the DVDs are also available in single - sided and in double - sided versions, this has one or two layers of information per side. The double-sided coupled with dual-layer DVD can also hold more than 16 gigabytes of data, which is more than 10 times the capacity of a CD-ROM. Even a single-sided and single-layer DVD can even hold more than four gigabytes, this is more than enough capacity for at least a two-hour movie that has been digitized in the highly efficient MPEG-2 compression type format. 

Soon after the first DVD players were being introduced, the single-sided DVDs also became the standard media to watch the movies at home, this completely replaced the videotapes. The consumers afterward appreciated the convenience of these discs as well as they appreciated the higher quality of the video images, the interactivity of the digital controls, and also the presence of numerous extra features sacked into the discs’ capacious storage.

What Next After DVD?

The next generation that goes beyond the DVD technology is the high-definition, abbreviated as the HD technology. Nowadays, the television systems switched over to digital signaling, thus with this, the high-definition television abbreviated as HDTV became popular. This HD quality features much greater picture resolution than the traditional television. The motion pictures are moreover suited for the display on a wide flat-panel HDTV screen, and in the year 2002, as in 1994–95, there were two competing, yet incompatible technologies presented for storing the video in high-definition on a simple CD-ROM-sized disc. HD DVD was proposed by Toshiba while NEC Corporation and Blu-ray proposed by a group which was led by Sony. Both the technologies employed a laser that emitted light in the color of blue-violet end in the visible spectrum. The shortest wavelength of this light is 405 nanometres, this is allowed yet the smaller pits are to be traced on even more closely spaced tracks that are on the DVD. As a result, the single-sided, single-layer disc had a storage capacity of 15 gigabytes (that is HD DVD) or about 25 gigabytes (the Blu-ray).

With these two incompatible technologies operating in the market, the consumers were very much reluctant to purchase the next-generation players for the fear that this standard would lose out to the other and render the purchase worthless. In addition to this, the movie studios faced potentially all expensive situations if they produced movies which lost format, and the computer and software firms were also deeply concerned about the type of disc drive that was needed for their products. These uncertainties created quite a pressure to settle on the format. In 2008 the entertainment industry also accepted Blu-ray as its preferred standard. While Toshiba’s group stopped the development of HD DVD. While in this time, there were rising of doubts about how long the new Blu-Ray discs will be viable, which has a growing number of movies in the high-definition that were available for the online streaming and cloud computing services which offered the consumers the data banks in order to store all the sorts of data which are digitized. 

DVD VS CD

The DVD player uses a laser which has higher power and this has a correspondingly fine focus point from that of the CD player. This also enables it to resolve the shorter pits and narrower separation tracks which thereby accounts for the DVD's greater storage capacity as well.