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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.
The space-consuming analog video signal of a LaserDisc limited playback duration to 30/36 minutes (CAV NTSC/PAL) or 60/64 minutes (CLV NTSC/PAL) per side, because of the hardware manufacturer's refusal to reduce line count and bandwidth for increased playtime, (as was done in VHS; VHS tapes had a 3 MHz video bandwidth, while LaserDisc preserves ...
Capacitance Electronic Disc (CED) vs. LaserDisc (LD) vs. VHD (Video High-Density), non-recordable video disc formats. All of these ultimately failed to achieve widespread acceptance, although LD found a considerable videophile niche market that appreciated its high quality image, chapter select and widescreen presentation. The LaserDisc ...
Optical discs can be recorded in Disc At Once, Track At Once, Session at Once (i.e. multiple burning sessions for one disc), or packet writing modes. Each mode serves different purposes: Disc At Once: writes the entire disc in one pass; preferred for duplication masters
A Betamax tape Analog video format developed by Sony. Inspired the later Betacam professional format. 1976 VHS: Video Home System Analog video recording on tape cassettes. Beat Betamax to become the dominant format for home analog video. 1978 LaserDisc: Close-up of grooves on a LaserDisc Analog video that was read via laser stored on a 12 inch ...
Compact Disc is still the de facto standard for audio recordings, although its place for other multimedia recordings and optical data storage has largely been superseded by DVD. DVD (initially an acronym of "Digital Video Disc", then backronymed as "Digital Versatile Disc" and officially just "DVD") was the mass market successor to CD.
Video Single Disc (VSD) is a disc-based format that carried the same analog video information as a LaserDisc, but on a 12-centimetre (4.75 inch) diameter CD-sized disc.It was spearheaded by Sony and was released in Japan in 1990.
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 ...