Videotek VTM-2000 Specifications download pdf (Page 104)

Glossary

VTM-2000 Installation and Operation Handbook

D-2

Broadcast Legal Encoding video signal parameters to conform to prescribed limits

for broadcast. Encoding rules vary by NTSC, PAL, country and broadcast facility.

BTSC Broadcast Television Standards Committee. A US standard for stereo audio

encoding in NTSC broadcast television.

CAV Component Analog Video

CES Consecutive Errored Samples

Composite Video A single video signal that includes all color video and timing

information. A composite signal includes luminance, chrominance, blanking pulses,

sync pulses and color burst information.

Chrominance The color portion of a video signal that represents the saturation and

hue. Black, gray and white have no chrominance; color signals have both chrominance

and luminance.

CH Chroma

Chrominance/Luminance Delay (C/L Delay) A measurement that indicates the

amount to which chrominance and luminance are aligned with respect to each other. A

low C/L delay figure can minimize the effects of ghosts or color offset on the received

picture.

Clipping The electronic process of shearing off the peaks of either the white or black

excursions of a video signal for limiting purposes. Clipping is often performed prior to

modulation to limit the signal.

CMRR Common Mode Rejection Ratio

Color Burst The portion of a color video signal which contains a short sample of the

color subcarrier. It is used as a color synchronization signal to establish a reference for

the color information following it and is used by a color monitor to decode the color

portion of a video signal. The color burst acts as both amplitude and phase reference

for color hue and intensity. The color oscillator of a color television receiver is phase

locked to the color burst.

Composite Sync A signal consisting of horizontal sync pulses, vertical sync pulses

and equalizing pulses only.

CRC Cyclical Redundancy Check

Crosspoint An electronic switch, usually controlled by a button on the panel. Control

logic will allow for only one crosspoint, for each bus, to be switched "ON" on at a

time.

D/A Conversion of digital to analog signals.

DA Distribution Amplifier

Data Element An item of data as represented before encoding and after decoding.

Decoded Stream The decoded reconstruction of a compressed bit stream.

Decibel (dB) A logarithmic measure of the ratio between two powers, voltages,

currents, sound intensities, etc. Signal-to-noise ratios are expressed in decibels.

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Videotek VTM-2000 Specifications Page 104