Stacked Volumetric Optical Disc

Optical discs

General

* Optical disc
* Optical disc drive
* Optical disc authoring
* Authoring software
* Recording technologies
* Recording modes
* Packet writing

Optical media types

* Compact disc (CD): CD-DA, CD-ROM]], CD-R, CD-RW, 5.1 Music Disc, Super Audio CD (SACD), Photo CD, CD Video (CDV), Video CD (Video CD|VCD]]), Super Video CD (Super Video CD|Video CD

Standards

* SFF ATAPI/MMC
* Mount Rainier (packet writing)
* Mount Fuji (layer jump recording)
* Rainbow Books
* File systems
* ISO 9660
* Joliet
* Romeo
* Rock Ridge / SUSP
* El Torito
* Apple ISO 9660 Extensions
* Universal Disk Format (UDF)
* ISO 13490

See also

* History of optical storage media
* High-definition optical disc format war

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Short description: Novel optical storage medium

The Stacked Volumetric Optical Disc (or SVOD) is an optical disc format developed by Hitachi Maxell, which uses an array of wafer-thin optical discs to allow data storage.

Each "layer" (a thin polycarbonate disc) holds around 9.4 GB[1] of information, and the wafers are stacked in layers of 20, 25, 100, or more, giving a substantially larger overall data capacity; for example, 100× cartridges could hold 940 GB using the system as announced.

Hitachi Maxell announced the creation of the SVOD standard in 2006, intending to launch it the next year. Aimed primarily at commercial users, the target price was ¥40,000 for a cartridge of 100 thin discs, with the potential to expand into the home user market. When they announced the system, Hitachi Maxell publicly recognized the possibility that the system could be eventually modified for use with a blue-violet laser, similar to Blu-ray discs, which could have expanded the capacity of the system to 3-5 TB. It is possible that they in fact developed this "second generation" SVOD for use with standard Blu-ray lasers, with each thin disc having a storage capacity of 25 GB, or a 100-disc cartridge having a storage of 5 TB.[2] Hitachi Maxell developed systems both for burning to the media using standard DVD optical heads, and pre-recording to the media using a special heat imprint technique they called "nanoimprinting." Though nanoimprinting initially required 6 minutes per disc for pressing, they had improved it to 8 seconds, and intended to achieve a comparable throughput to standard DVD pressing.[3] The primary application of the SVOD system seemed to be business data archival, replacing digital tape archives.[4][2]

In 2007, Japanese broadcaster NHK announced a similar system, based on Blu-ray discs, of stacked optical storage media specifically designed to rotate at high speeds, up to 15,000 RPM.[5]

SVOD was anticipated to be a likely be a candidate, along with Holographic Versatile Discs (HVDs), to be a next-generation optical disc standard.[citation needed] However, as of 2021, little has been done with the format.[citation needed]

## References

1. ↑ "New DVD Discs Will Store One Terabyte Data". RealityPod. http://realitypod.com/2010/11/new-dvd-discs-will-store-one-terabyte-data/. Retrieved 21 November 2012.
2. ↑ 2.0 2.1 Dripchak, Al (2007-09-19). "SVOD: Stacked Volumetric Optical Discs". http://osta.org/oss/pdf/presentations07/Maxell.pdf.
3. ↑ Yasushi Uchida (2006-04-20). "Hitachi Maxell Develops New Optical Storage Technology Enabling Approx. 1 TB Capacity with 6.5 cm thick Cartridge". http://techon.nikkeibp.co.jp/english/NEWS_EN/20060420/116406/.
4. ↑ "Hitachi Maxell 1TB SVOD optical disc cart" (in en-US). https://www.engadget.com/2006-04-20-hitachi-maxell-1tb-svod-optical-disc-cart.html.
5. ↑ Williams, Martyn (2007-05-29). "NHK Pushes Optical Disc Speed Limit" (in en). https://www.techhive.com/article/132305/article.html.

## External links

* Hitachi Maxell develops wafer-thin storage disc details and interview from IDG News Service (dead link, archived) (4 October 2006)
* Maxell details in Japanese language (dead link, archived) (19 April 2006)

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Video storage formats

Videotape|

| Analog|

* Quadruplex (1956)
* VERA (1958)
* Ampex 2 inch helical VTR (1961)
* Sony 2 inch helical VTR (1961)
* 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)
* S-VHS-C (1987)
* Hi8 (1989)
* Ruvi (1998)

|

Digital|

* D1 (1986)
* D2 (1988)
* D3 (1991)
* DCT (1992)
* Digital Betacam (1993)
* D5 (1994)
* Digital-S (D9) (1995)
* Betacam SX (1996)
* Digital8 (1999)
* MicroMV (2001)

High Definition|

* Sony HDVS (1984)
* UniHi (1984)
* BCH 1000 (1992)
* W-VHS (1994)
* HDCAM (1997)
* D-VHS (1998)
* D6 HDTV VTR (2000)
* HDV (2003)
* HDCAM SR (2003)

Videodisc|

| Analog|

* Phonovision (1927)
* Ampex-HS (1967)
* TeD (1975)
* LaserDisc (1978)
* CED (1981)
* VHD (1983)
* Laserfilm (1984)
* CD Video (1987)
* VSD (1990)

|

Digital|

* VCD (1993)
* MovieCD (1996)
* DVD (1996)
* MiniDVD (c. 1996)
* CVD (1998)
* SVCD (1998)
* EVD (2003)
* PVD (Personal Video Disc) (2003)
* UMD (2004)
* FVD (2005)

High Definition|

* MUSE Hi-Vision LD (1994)
* Professional Disc (PFD) (2003)
* HVD (High-Definition Versatile Disc) (2004)
* VMD (2006)
* HD DVD (2006)
* BRD (BD/Blu-ray Disc) (2006)
* MiniBD (c. 2006)
* HVD (Holographic Versatile Disc) (2007)
* CBHD (China Blue High-definition Disc) (2008)

Ultra-High Definition|

* UHD BRD (Ultra HD Blu-ray Disc) (2016)

Virtual|

| Media agnostic|

* DV (1995)
* DVCPRO (1995)
* DVCAM (1996)
* DVCPRO50 (1997)
* DVCPRO HD (2000)

|

Tapeless|

* CamCutter]] Editcam (1995)
* XDCAM (2003)
* MOD (2005)
* AVCHD (2006)
* AVC-Intra (2006)
* TOD (2007)
* iFrame (2009)
* XAVC (2012)

Solid state|

* P2 (2004)
* SxS (2007)
* MicroP2 (2012)

Video recorded to film|

* Kinescope (1947)
* Electronicam kinescope (1950s)
* Electronic Video Recording (1967)

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