Merging VCube, Руководство пользователя

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Appendices : Glossary Page 285
• ruler: A graphic element of a video editing application that shows time or TimeCode along a horizontal
axis. Similar to the ruler in word processing applications except calibrated in units of time.
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• safe action area: and safe title area: are the regions of the video image considered safe from cropping
for either the action or on-screen titles, taking into account variations in adjustments for video monitors or
television receivers. Safe action is 90 percent of the screen measured from the center, and safe title is 80
percent.
• SDI Serial Digital Interface: , standardized in ITU-R 656, is a digitized video format used for broadcast
grade video. It typically uses 75 Ohm BNC coaxial cables (which makes it easily upgradeable from analog
video setups, which use the same cables). Uncompressed digital component signals are transmitted. The
SDI signal is self-synchronizing, uses 8 bit or 10 bit data words, and has a data rate of 270 Mbit/s. A SDI sig-
nal may also contain embedded AES/EBU 48kHz, 16bit audio channels along with the video.
• SMPTE TimeCode: TimeCode that conforms to SMPTE standards. It consists of an eight-digit number
specifying hours: minutes: seconds: frames. Each number identifies one frame on a videotape. SMPTE
TimeCode may be of either the drop-frame or non-drop frame type.
• shuttle: is the process of viewing of footage at speeds greater than real time.
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• TBC: Time base corrector. Device used to correct for time base errors and stabilize the timing of the video
output from a tape machine.
• TCP/IP (Transmission Control Protocol/Internet Protocol): Transmission control protocol/Internet pro-
tocol. TCP/IP is a combined set of protocols that perform the transfers of data between two computers.
TCP monitors and ensures correct transfer of data. IP receives the data from TCP, breaks it up into packets,
and sends it to a network within the Internet. Every computer on the Internet supports TCP/IP.
• telecine: A device for capturing movie film as a video signal.
• TimeCode:
• The time, measured in hours, minutes, seconds and frames, which is recorded on a tape along with
program material and user bit information. The TimeCode is used to locate particular points on a
tape.
• A method of identifying video frames on a recorded format. A TimeCode number is a series of 8 dig-
its (SMPTE TimeCode) which represents the hour, minute, second, and frame number of video. Two
popular systems are: Longitudinal TimeCode (LTC) and Vertical Interval TimeCode (VITC).
• Timeline: A window within a video editing application where Clips and other production elements can be
graphically arranged to create a fully edited production. The horizontal axis of the timeline window repre-
sents a timeline of the show.
• toggle: To change back and forth between two states (for instance: on, off, on, off, etc.)
• track: Levels in the timeline window of an editing application where video and audio elements can be
placed to insert them into the production.
• tri-level: Synchronization signal dedicated to HD. The signal consists of a three-level sync pulse (zero volts
(0V) Blank, -0.3 V pulse, +0.3 V pulse) followed by the video image data. Like analog sync, the signal is
repeated every scan line as it creates an entire HD video frame.
• trim: In video editing systems, to add or subtract TimeCode to adjust edit points.
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• Underscan: The process of displaying a TV picture on an area smaller than the TV picture tube size per-
mitting view of the entire video picture, including sync and blanking. Many professional TV monitors have
an underscan button or switch to allow for viewing the entire TV picture.
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• VCR: Video cassette recorder.
• VITC: Vertical interval TimeCode. TimeCode encoded into the vertical interval of the video. It can usually
be read out even when a VTR is still-framed or running at slower or faster than play speed.