DVD, also known as Digital Versatile Disc or Digital Video Disc, is an optical disc In computing and optical recording, an optical disc or optical disk) is a flat, usually circular disc which encode binary data in the form of pit`s (binary value of 0 or off, due to lack of reflection when read) and lands (binary value of 1 or on, due to a reflection when read) on a special material (often aluminium[citation needed]) on one of its storage A data storage device is a device for recording information (data). Recording can be done using virtually any form of energy, spanning from manual muscle power in handwriting, to acoustic vibrations in phonographic recording, to electromagnetic energy modulating magnetic tape and optical discs media format, and was developed and invented by Sony Sony Corporation (Japanese: ソニー株式会社, Sonī Kabushiki Kaisha?) (TYO: 6758) is a multinational conglomerate corporation headquartered in Minato, Tokyo, Japan, and one of the world's largest media conglomerates with revenue exceeding ¥ 7.730.0 trillion, or $78.88 billion U.S. (FY2008). Sony is one of the leading manufacturers of, and Philips Koninklijke Philips Electronics N.V. , most commonly known as Philips, (Euronext: PHIA, NYSE: PHG) is a multinational Dutch electronics corporation in 1995. Its main uses are video Video is the technology of electronically capturing, recording, processing, storing, transmitting, and reconstructing a sequence of still images representing scenes in motion and data The term data means groups of information that represent the qualitative or quantitative attributes of a variable or set of variables. Data are typically the results of measurements and can be the basis of graphs, images, or observations of a set of variables. Data are often viewed as the lowest level of abstraction from which information and storage. DVDs are of the same dimensions as compact discs (CDs A Compact Disc is an optical disc used to store digital data. It was originally developed to store sound recordings exclusively, but later it also allowed the preservation of other types of data. Audio CDs have been commercially available since October 1982. In 2010, they remain the standard physical storage medium for audio), but store more than six times as much data.
Variations of the term DVD often indicate the way data is stored on the discs: DVD-ROM (read only memory) has data that can only be read and not written; DVD-R DVD-R is a DVD recordable format. A DVD-R typically has a storage capacity of 4.71 GB , although the capacity of the original standard developed by Pioneer was 3.95 GB (3.68 GiB). Both values are significantly larger than the storage capacity of its optical predecessor, the 700 MB CD-R – a DVD-R has 6.4 times the capacity of a CD-R. Pioneer has and DVD+R (recordable) can record data only once, and then function as a DVD-ROM; DVD-RW A DVD-RW disc is a rewritable optical disc with equal storage capacity to a DVD-R, typically 4.7 GB. The format was developed by Pioneer in November 1999 and has been approved by the DVD Forum. Unlike DVD-RAM, it is playable in about 75% of conventional DVD players.[citation needed] The smaller Mini DVD-RW holds 1.46 GB, with a diameter of 8 cm (re-writable), DVD+RW, and DVD-RAM DVD-RAM is a disc specification presented in 1996 by the DVD Forum, which specifies rewritable DVD-RAM media and the appropriate DVD writers. DVD-RAM media have been used in computers as well as camcorders and personal video recorders since 1998 (random access memory) can all record and erase data multiple times. The wavelength used by standard DVD lasers is 650 nm;[4] thus, the light has a red Red is any of a number of similar colors evoked by light consisting predominantly of the longest wavelengths of light discernible by the human eye, in the wavelength range of roughly 630–740 nm. Longer wavelengths than this are called infrared , and cannot be seen by the naked human eye. Red is used as one of the additive primary colors of light, color.
DVD-Video DVD-Video is a consumer video format used to store digital video on DVD discs, and is currently the dominant consumer video format in Canada, Europe and Australia. Discs using the DVD-Video specification require a DVD drive and a MPEG-2 decoder . Commercial DVD movies are encoded using a combination of MPEG-2 compressed video and audio of varying and DVD-Audio DVD-Audio is a digital format for delivering high-fidelity audio content on a DVD. DVD-Audio is not intended to be a video delivery format and is not the same as video DVDs containing concert films or music videos. The first discs entered the marketplace in 2000. DVD-Audio was in a format war with Super Audio CD (SACD), another format for discs refer to properly formatted and structured video and audio content, respectively. Other types of DVDs, including those with video content, may be referred to as DVD Data discs.
Contents |
AllAfrica.com
"The 4D images can be stored on a compact disc or digital versatile disk (DVD) or flash disk and replayed on a computer or similar device," he said. ...
