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The Universal Media Disc (UMD) is a discontinued optical disc medium developed by Sony for use on its PlayStation Portable handheld gaming and multimedia platform. It can hold up to 1.8 gigabytes of data and is capable of storing video games, feature-length films, and music.
A digipak or digipack (generic term) [citation needed] is a rectangular cardboard package with one or more plastic trays capable of holding a disc attached to the inside. There are variations where the disc(s) sit on a hub or spindle inside and come in various sizes. A digipak-style case is a common alternative to the jewel case. [24]
Initially, Sony believed that it would take around a decade for CD-R prices to become affordable – the cost of a typical blank CD-R disc was around $12 in 1994 – but CD-R prices fell much more rapidly than envisioned, to the point where CD-R blanks sank below $1 per disc by the late 1990s, compared to at least $2 for the cheapest 80-minute ...
These were referred to as CD Video (CD-V) discs, and Video Single Discs (VSD). CD-V was a hybrid format launched in the late 1980s, and carried up to five minutes of analog LaserDisc-type video content with a digital soundtrack (usually a music video), plus up to 20 minutes of digital audio CD tracks.
Visc is a mechanical video disc system developed in Japan by Matsushita subsidiary National Panasonic in 1978. The 12-inch vinyl disc is spun at 500 rpm with each revolution holding three frames of color video, with a total of up to an hour of video on each side of the disc. [9] Discs can be recorded in either a 30-minute-per-side format, or a ...
A Flexplay disc is shipped in a vacuum-sealed package. There is a clear dye inside the disc, contained within the bonding resin of the disc, which reacts with oxygen. [4] When the seal is broken on the vacuum-packed disc, the layer changes from clear to black in about 48 hours, rendering the disc unplayable. [5]
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 be detected on the other side. Optical discs can store analog information (e.g. Laserdisc), digital information (e.g. DVD), or store both on the same disc (e.g. CD Video).
The HD layer of an SACD disc cannot be played back on computer CD/DVD drives, and SACDs can only be manufactured at the disc replication facilities in Shizuoka and Salzburg. [ 28 ] [ 29 ] Nonetheless, very early versions of the PlayStation 3 with an SACD-compatible drive and appropriate firmware [ 30 ] and certain Blu-ray players [ 31 ] [ 32 ...