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Protein-coated disc

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Protein-Coated Disc (PCD) is a theoretical optical disc technology currently being developed by Professor Venkatesan Renugopalakrishnan, formerly of Harvard Medical School and Florida International University. PCD would greatly increase storage over Holographic Versatile Disc optical disc systems. It involves coating a normal DVD with a special light-sensitive protein made from a genetically altered microbe, which would in principle allow storage of up to 50 Terabytes on one disc. Working with the Japanese NEC Corporation, Renugopalakrishnan's team has created a prototype device and estimate that a USB disk will be commercialised in 12 months and a DVD in 18 to 24 months as of July, 2006^[1]. The technology uses the photosynthetic pigment bacteriorhodopsin created from bacteria.

1 Technology
2 See also
3 References
4 External links

Technology

The information in such discs would be highly dense, due to being stored in proteins that are only a few nanometres across. However, a method to address individual protein molecules to read and write information to and from them would have to be developed in order to achieve the theoretical 50 TB capacity. Practically, capacity would probably be limited by the size that addressing light can be focused to, so a DVD-sized disc might be able to hold ~50 GB, or perhaps ~240 GB if nearfield optics were used.

References

^ DVD uses bug protein to store data. ABC (2006-07-07).

External links

Protein-Coated Disc (English). ANI (2006-07-08).
Protein Coated Discs Engadget

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Industrial & home video media

Magnetic tape

Analog

VERA (1952) • 2 inch Quadruplex videotape (1956) • 1 inch type A videotape (1965) • 1/4 inch Akai (1967) • U-matic (1969) • EIAJ-1 (1969) • Cartrivision (1972) • Video Cassette Recording (aka VCR) (1972) • V-Cord (1974) • VX (aka "The Great Time Machine") (1974) • Betamax (1975) • IVC 2 inch Helical scan (1975) - 1 inch type B videotape (1976) • 1 inch type C videotape (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) • D5 (1994) • Digital Betacam (1993) • DV (1995) • Digital-S (D9) (1995) • DVCPRO (1995) • 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)

Optical disc

Analog

Laserdisc (1978) • Laserfilm (1984) • CD Video (1986?)

Digital

VCD (1993) • MovieCD (1995?) • DVD-Video (1995) • MiniDVD • CVD (1998) • SVCD (1998) • FMD (2000) • EVD (2003) • HVD (2004) • FVD (2005) • UMD (2005) • VMD (2006) • HD DVD (2006) • Blu-ray Disc (BD) (2006) • DMD (2006?) • AVCHD (2006) • Tapestry Media (2007) • Total Hi Def (2008) • HVD (TBA) • PH-DVD (TBA) • SVOD (TBA) • Protein-coated disc (TBA) 3D disc (TBA)