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