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A CED has a spiral groove on both sides. The groove is 657 nm wide and has a length of up to 19 km (12 mi). The discs rotate at a constant angular speed during playback (450 rpm for NTSC, 375 rpm for PAL) and each rotation contains eight interlaced fields, or four full frames of video. These appear as spokes on the disc surface, with the gap ...
A progressive scan DVD player is a DVD player that can produce video in a progressive scan format such as 480p or 576p . Players which can output resolutions higher than 480p or 576p are often called upconverting DVD players. Before HDTVs became common, players were sold which could produce 480p or 576p. TVs with this feature were often in the ...
Each side of the disc can hold 50,000 still CAV frames, and both sides can be read without removing the disc. Thomson exited the videodisc market in 1981. [12] RCA produced a system called CED under the brand SelectaVision in 1981. The system uses a physical pickup riding in grooves of a pressed disc, reading variance in capacitance in the ...
The Pioneer DVL-9, introduced in 1996, was both Pioneer's first consumer DVD player and the first combination DVD/LD player. The first high-definition video player was the Pioneer HLD-X0. A later model, the HLD-X9, featured a superior comb filter, and laser diodes on both sides of the disc.
CD/DVD copy protection is a blanket term for various methods of copy protection for CDs and DVDs. Such methods include DRM, CD-checks, Dummy Files, illegal tables of contents, over-sizing or over-burning the CD, physical errors and bad sectors. Many protection schemes rely on breaking compliance with CD and DVD standards, leading to playback ...
DVD-D and Flexplay, disposable optical disc formats designed to become unplayable after a limited time; M-Disc, an optical disc format claimed to have a reduced rate of rot compared to conventional DVDs; Panchiko, a band who gained popularity in 2016 when a 2000 demo EP--which was notably distorted due to CD-R disc rot--was found in a charity shop.
Various software, firmware, and hardware components may add up to a substantial delay associated with starting playback of a track. If not accounted for, the listener is left waiting in silence as the player fetches the next file (see harddisk access time), updates metadata, decodes the whole first block, before having any data to feed the hardware buffer.
The drive treats a DVD-Video disc as any DVD-ROM disc. The player reads the disc's user-data and processes them according to the DVD-Video format. However, if the drive detects a disc that has been compiled with CSS, it denies access to logical blocks that are marked as copyrighted (§6.15.3 [ 4 ] ).