Main article: Content Protection for Recordable Media

DVD-Audio discs employ a robust^{[citation needed]} copy prevention mechanism, called Content Protection for Prerecorded Media (CPPM) developed by the 4C group (IBM, Intel, Matsushita, and Toshiba).

To date, CPPM has not been "broken" in the sense that DVD-Video's CSS has been broken, but ways to circumvent it have been developed.^[19] By modifying commercial DVD(-Audio) playback software to write the decrypted and decoded audio streams to the hard disk, users can, essentially, extract content from DVD-Audio discs much in the same way they can from DVD-Video discs.

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Successor

In 2006, a new format called Blu-ray Disc (BD), designed by Sony, Philips, and Panasonic, was released as the successor to DVD. Another format, HD DVD, competed unsuccessfully with this format in a format war from 2006 to 2008.

However, unlike previous format changes (i.e. vinyl records to compact disc, VHS videotape to DVD), there is no immediate indication that production of the standard DVD will gradually wind down, as they still dominate with around 97% of video sales.^[20] Consumers have been slow to adopt Blu-ray, partly due to the initial cost, with Blu-ray players selling for $400 USD or more, while titles retail for $30 USD or higher, plus one requires a high-definition TV and appropriate connection cords to take advantage of it. Some analysts suggest that the biggest obstacle to replacing DVD is due to its installed base; a large majority of consumers are satisfied with DVDs.^[21] The DVD had succeeded because it offered a compelling alternative to VHS. In addition, both HD DVD and Blu-ray players are designed to be backwards compatible, allowing older DVDs to be played since the media are physically identical; this differed from the change from vinyl to CD and from tape to DVD which involved a complete change in physical medium. This situation can be best compared to the changeover from 78 rpm vinyl recordings to 45 rpm and 33 1/3 rpm recordings; since the medium used for the earlier format was virtually the same as the latter version (a disk on a turntable, played using a needle), phonographs continued to be built to play obsolete 78s for decades after the format was discontinued. Manufacturers have announced standard DVD releases well into 2009, and the format remains the preferred one for the release of older television programs and films, with some programs such as Star Trek: The Original Series requiring reediting and replacement of certain elements such as special effects in order to be felt acceptable for high-definition viewing.

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See also

• DVD authoring
• DVD formats
• DVD region code
• DVD TV games
• DVD-Video
• MiniDVD
• HDTV quality DVD Player

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Notes

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References

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External links

• DVD Forum
• DVD+RW Alliance
• DVD Copy Control Association and the Content Scramble System (CSS)
• Dual Layer Explained – Informational Guide to the Dual Layer Recording Process
• VPD Inc. – DVD Distributor
• Understanding Recordable & Rewritable DVD by Hugh Bennett
• DVD Frequently Asked Questions (and Answers)
• DVDs: in the fast lane
• History of DVD technology from the Consumer Electronics Association
• How Stuff Works - DVD
• DVD Street

v • d • e Video storage formats Videotape Analog Quadruplex (1956) · VERA (1958) · Type A (1965) · CV-2000 (1965) · Akai (1967) · U-matic (1969) · EIAJ-1 (1969) · Cartrivision (1972) · Philips VCR (1972) · V-Cord (1974) · VX (1974) · Betamax (1975) · IVC (1975) · Type B (1976) · Type C (1976) · VHS (1976) · VK (1977) · SVR (1979) · Video 2000 (1980) · CVC (1980) · VHS-C (1982) · M (1982) · Betacam (1982) · Video8 (1985) · MII (1986) · S-VHS (1987) · Hi8 (1989) · S-VHS-C (1987) · W-VHS (1994) Digital D1 (1986) · D2 (1988) · D3 (1991) · DCT (1992) · D5 (1994) · Digital Betacam (1993) · DV (1995) · Digital-S (D9) (1995) · DVCPRO (1995) · Betacam SX (1996) · DVCAM (1996) · HDCAM (1997) · DVCPRO50 (1998) · D-VHS (1998) · Digital8 (1999) · DVCPRO HD (2000) · D6 HDTV VTR (2000) · MicroMV (2001) · HDV (2003) · HDCAM SR (2003) Videodisc Analog Phonovision (1927) · TeD (1975) · Laserdisc (1978) · CED (1981) · Laserfilm (1984) · CD Video (1987) Digital VCD (1993) · MovieCD (~1995) · DVD/DVD-Video (1995) · MiniDVD (~1995) · CVD (1998) · SVCD (1998) · EVD (2003) · XDCAM (2003) · HVD (2004) · FVD (2005) · UMD (2005) · VMD (2006) · HD DVD (2006) · Blu-ray Disc (2006) Solid state DVCPRO P2 (2004) · AVC-Intra (2006) · XDCAM EX (2007) Digital tapeless MOD (2005) · AVCHD (2006) · TOD (2007) Non-video TV recording Kinescope (1947) · Electronicam kinescope (1950s) · Electronic Video Recording (1967)

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