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An early analogue optical disc system existed in 1935, used on Welte's Lichttonorgel sampling organ. [15] An early analog optical disc used for video recording was invented by David Paul Gregg in 1958 [16] and patented in the US in 1961 and 1969. This form of optical disc was a very early form of the DVD (U.S. patent 3,430,966).
Multiple formats encoded onto the same disc 2005 HD DVD: An HD DVD Digital. Uses VC-1, H.264/MPEG-4 AVC, or H.262/MPEG-2 Part 2 video formats and Dolby TrueHD, DTS-HD Master Audio audio formats 2006 Blu-ray Disc: Blu-Ray discs and their containers Digital. Dolby TrueHD, DTS-HD Master Audio: 2008 slotMusic
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.
This system is very similar to—yet predates—the one used in Compact Disc players to follow the spiral optical track, where typically a servo motor moves the optical pickup in steps for coarse tracking and a set of coils shifts the laser lens for fine tracking, both guided by an optical sensing device, which is the analogue of CED stylus ...
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.
However, they are less playable in most Blu-ray Disc players, vehicle audio with DVD/Blu-ray support and video game consoles such as the Sony PlayStation and Xbox due to lack of backward compatibility for the older MPEG-1 format, inability to read MPEG-1 in .dat files alongside MPEG-1 in standard MPEG-1, AVI, and Matroska files, or inability to ...
The DVD Book also permits an additional disc type called DVD-14: a hybrid double-sided disc with one dual-layer side, one single-layer side, and a total nominal capacity of 12.3 GB. [60] DVD-14 has no counterpart in ISO. [49] Both of these additional disc types are extremely rare due to their complicated and expensive manufacturing. [60]
Despite demonstrating the player at several Consumer Electronics Shows, JVC opted not to release VHD as a consumer product in North America. In the UK, Thorn EMI, which was the leading consumer provider of the VHS tape system, saw VHD as the next step in the market and committed to the system. In 1981 it invested in a factory to press discs (in ...