Video Disk Control Protocol: Difference between revisions

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{{Short description|Communication protocol}}

{{orphan|date=March 2010}}

'''Video Disk Control Protocol''' ('''VDCP''') is a [[proprietary communications protocol]] primarily used in [[broadcast automation]] to control [[hard disk]] [[video server]]s for [[broadcast television]]. [[VDCP]] was originally developed by [[Louth Automation]] and is commonly called the '''Louth Protocol'''. At the time it was developed, when Hewlett Packard (whose broadcast server division was eventually sold to [[Pinnacle Systems]]) and [[Tektronix]] were both bringing to market the first of the VideoFile Servers to be used in the broadcast industry. They contacted Louth Automation who then designed the [[communications protocol]] basing it on Sony protocols of both the Sony LMS Storage Device and the Sony VTR. The principal work was carried out by Ken Louth andat StanLouth BeckerAutomation.

VDCP uses a tightly coupled master-slave methodology. The controlling device takes the initiative in communications between the controlling devicebroadcast ([[automation)]] device and the controlled device (video disk). VDCP conforms to the [[Open Systems Interconnection]] (OSI) reference model.

'''Video Disk Control Protocol''' ('''VDCP''') is a [[proprietary communications protocol]] primarily used to control [[hard disk]] [[video server]]s for [[broadcast television]]. VDCP was originally developed by [[Louth Automation]] and is commonly called the ''Louth Protocol''. At the time it was developed when Hewlett Packard (eventually sold to [[Pinnacle Systems]]) and [[Tektronix]] were both bringing to market the first of the VideoFile Servers to be used in the broadcast industry. They contacted Louth Automation who then designed the protocol basing it on Sony protocols of both the Sony LMS Storage Device and the Sony VTR. The principal work was carried out by Ken Louth and Stan Becker.

VDCP is a [[serial communications]] protocol based on [[RS-422]]. It is derived from the [[Sony]] [[9-Pin Protocol]], an industry-standard protocol for control of professional broadcast [[VTR]]s that is used in [[Online editing (video production)|online editing]].

VDCP uses a tightly coupled master-slave methodology. The controlling device takes the initiative in communications between the controlling device (automation) and the controlled device (video disk). VDCP conforms to the [[Open Systems Interconnection]] (OSI) reference model.

VDCP is a [[serial communications]] protocol based on [[RS-422]]. It is derived from the [[Sony]] [[9-Pin Protocol]], an industry-standard protocol for control of professional broadcast [[VTR]]s.

Full details of the protocol are available from [[HarrisImagine Communications Broadcast]]who, aas division of [[Harris Corporation]] whoBroadcast, acquired Louth in 2000.

It was largely succeeded by the [[Network Device Control Protocol]].<ref name="q429">{{cite web | title=Harris launches network-based automation protocol for controlling broadcast audio/video devices | website=Digital Broadcasting com | date=2001-02-14 | url=https://www.digitalbroadcasting.com/doc/harris-launches-network-based-automation-prot-0001 | access-date=2025-08-14}}</ref>

==References==

In 2001 Harris announced the introduction of [[Network Device Control Protocol|NDCP]], a TCP/IP-based successor for VDCP. Little information on NDCP is readily available, and thus VDCP has remained the de-facto standard.

{{Reflist}}

==External links==

* [http://www.broadcast.harrisimaginecommunications.com/ Imagine Communications (formerly Harris Broadcast)]

* [http://www.harris.com//view_pressrelease.asp?act=lookup&pr_id=476 NDCP Launch press release]

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[[Category:Television technology]]

[[Category:Digital television]]

[[Category:Film and video technology]]

[[Category:Television terminology]]

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