Get Streaming!: Quick Steps to Delivering Audio and Video Online
By Joe Follansbee

Glossary

Numbers

3-pointlighting
The standard method of lighting a video subject, using a key light, a fill light, and a backlight.

A-C

Analog
Describes data flowing in a continuous, often variable manner.
Artifacts
Lines, distortion, snow, or other unwanted data in a video image usually introduced bypoor-quality equipment. Artifacts can appear in audio as odd sounds, dropouts (missing sound), ordistortion.
Aspect ratio
The ratio of width to height of a video frame. Common ratios are 4:3 and16:9.
ASP
Active Server Page.
ASX
The Microsoft Windows Media Services metafile file type.
Authentication
A process that ensures a user is authorized to access a file or service.
AVI
Audio Video Interleaved. A standard uncompressed or compressed video format for personalcomputers.
Back light
A light shone behind a subject to bring it out of the background.
Bandwidth
The amount of data that can be transmitted over a network in a givenmoment.
Bit
A single unit of data.
Bit rate
The flow rate of data (bits) over a computer network.
Broadband
Usually refers to DSL and/or cable residential and small-business Internet connections,though it may sometimes refer to higher data rates available on biggerconnections.
Browser
A software application that displays text, graphics, and some multi- media files downloadedfrom World Wide Web servers.
Buffer
A portion of RAM reserved for storing streaming data before rendering by a mediaplayer.
Byte
A unit of data comprised of bits.
Cable
1. An insulated length of wiring connecting two hardware devices. 2. An Internet connectionthrough a cable television operator.
Capturing
Copyright Elsevier Inc. 2004 under license agreement with Books24x7
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