Video Disk Control Protocol: Difference between revisions

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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 Group 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 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 Interconnect]](OSI) reference model.

VDCP is a [[serial communications]] protocol based on [[RS-422]]. It is derived from the [[Sony]] [[P29-Pin Protocol]], an industry-standard protocol for control of professional broadcast [[VTR]]s.

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