Search results
Results from the WOW.Com Content Network
Videodisc (or video disc) is a general term for a laser- or stylus-readable random-access disc that contains both audio and analog video signals recorded in an analog form. Typically, it is a reference to any such media that predates the mainstream popularity of the DVD format.
An optical disc is a flat, usually [note 1] disc-shaped object that stores information in the form of physical variations on its surface that can be read with the aid of a beam of light. Optical discs can be reflective, where the light source and detector are on the same side of the disc, or transmissive, where light shines through the disc to ...
Professionals record at 30 ips on 3600 ft reels that will fit 22.5 minutes (one side only). A 3600 ft reel can hold up to 48 hours if recorded in mono (4 sides) at 15/16 ips. Compact disc: Digital Earlier discs: up to 74 minutes (or up to 650 MB of data files) Later discs: up to 80 minutes (or up to 700 MB of data files) Recordable discs: Digital
When a disc began to wear, video and audio quality would severely decline, and the disc would begin to skip. [20] Several discs suffered from a condition called "video virus", where a CED would skip a great deal due to dust particles stuck in the grooves of the disc. However, playing the disc several times would generally solve this problem. [21]
MCA DiscoVision, Inc. was a division of entertainment giant MCA (Music Corporation of America), established in 1969 to develop and sell an optical videodisc system. MCA released discs pressed in Carson and Costa Mesa, California on the DiscoVision label from the format's Atlanta, Georgia launch in 1978 to 1982 and the release of the film, The Four Seasons.
The first compact discs were stamped off the production line on August 17, 1982. Since then, 200 billion CDs have been produced — 194 billion accounted for by AOL signup disks, according to Wired .
The Philips development of the videodisc technology began in 1969 with efforts by Dutch physicists Klaas Compaan and Piet Kramer to record video images in holographic form on disc. [12] [13] Their prototype Laserdisc shown in 1972 used a laser beam in reflective mode to read a track of pits using an FM video signal. Together with MCA, Philips ...
In June 1948, Columbia Records released the first 33 1/3 LP – “long-playing record” – from what is now known as the New York Philharmonic.The 12-inch vinyl slates – as opposed to its ...