Glossary
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## Glossary

archive system

  A repository for storing and distributing digital media data. An attached archive system is one that a VCP-Recorder has been configured to use. VCP-Recorder can store clips in, and retrieve them from, attached archive systems only.

asset

  Unit of storage in an archive system. Each asset consists of descriptive information such as the title and duration; digital media data, if the asset has content; and an index, if required by the content format. For example, each movie, commercial, trailer, thumbnail, and so on, stored in an archive system is an asset. Assets may consist of only descriptive information if those assets are used to group other assets.

automation controller

  Computers that control broadcast devices. Automation controllers provide features such as playing and recording clips according to a predefined schedule, providing statistics about actual events, previewing schedules, controlling broadcast equipment, and so on.

clip

  Unit of storage in VCP-Recorder. Each clip consists of descriptive information such as the title and duration; digital media data, if the clip has content; and an index, if required by the content format.

clip cache

  XFS filesystems in which VCP-Recorder stores clips. The clip cache can reside on a normal XFS filesystem that can be shared with other uses, or a real-time filesystem created on a set of striped disks or RAID units.

cue point

  Timecodes that are used to move around within a clip and to control the portion of the clip that is played. An in-point, the duration, and an out-point are each specified using the hh:mm:ss:ff hh is the hours, mm is the minutes, ss is the seconds, and ff is the frame number. In drop-frame mode, the final colon is replaced by a period (hh:mm:ss.ff).

  For example, if a clip with a cue in-point of 00:00:30.00 is cued for playing in the forward direction, it is cued at 30 seconds.

DIVO

  Digital Video Option, available on Origin servers. DIVO provides digital video ports through which digital media data is played and recorded by VCP-Recorder.

edit point

  Persistent timecode values that are stored with a clip. Edit points are used to automatically initialize the cue points when the clip is loaded. An in-point, the duration, and an out-point can each be specified using the hh:mm:ss:ff format, where hh is the hours, mm is the minutes, ss is the seconds, and ff is the frame number. In drop-frame mode, the final colon is replaced by a period (hh:mm:ss.ff).

  For example, if a clip has an edit in-point of 00:00:30.00, its cue in-point is initialized to 30 seconds when the clip is loaded.

  Edit points may also be called “edit marks.”

MVCP

  Multiple-Unit Video Computer Protocol. A protocol defined by Silicon Graphics that provides full-featured control of VCP-Recorder through TCP/IP.

port

  A point at which an external device connects to VCP-Recorder. VCP-Recorder defines the following types of ports:

- Video ports, which are used by video input and output devices. DIVO video ports are named DIVO_”n” (for example, DIVO_2), the O2 workstation video port is named mvp, and Vela decoder ports are named vela_”n” (for example, vela_2).

- Deck control ports, which are used by VLAN transmitters. Deck control ports are named vlan_”n” (for example, vlan_0).

  The term media port refers to any port through which digital media data is passed. That is, the term refers to either a video or a deck control port.

Rice

  A lossless bit reduction (compression) encoding scheme that is supported on the Silicon Graphics DIVO video option.

unit

  A software mechanism that functions like a logical video tape recorder transport that is capable of loading, cueing, playing, and recording digital clips. The unit manages a media port, which may be shared with another unit.

  A unit may also called a logical unit.

VTR

  Videotape recorder, which is a device that records and plays videotapes.

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Appendix A. Using a MediaHub Archive System |  | Index