Video Disk Control Protocol: Difference between revisions

Revision as of 01:09, 14 June 2006

Revision as of 02:40, 25 September 2006

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'''Video Disk Control Protocol''' ('''VDCP''') is a proprietary [[communications protocol]] primarily used to control [[hard disk]] [[video server|video servers]] 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 [[Grass Valley (company)|Grass Valley Group]] were both bringing to market the first of the VideoFile Servers to be used in the Broadcastbroadcast Industryindustry. They contacted Louth Automation who then designed the protocol basing it on Sony Protocolsprotocols of both the Sony LMS Storage Device and the Sony VTR. The principal work was carried out by Ken Louth and Stan Becker.

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 InterconnectInterconnection]] (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.