Antialiasing: The method used to smoothen the jagged edges in graphics or video.

Active Streaming Format. Popularly known by is acronym ASF, this is a Microsoft file format used for digital video playback over the Internet.

Auto-tracking: The term used to track speakers by voice. Color pattern recognition or radio signals can also be used.

Audio Video Interleaved. This is a Microsoft format and is used for digital audio and video playback from Windows 3.1. It is better known by its acronym AVI.

Bandwidth: The volume of digital data that can be moved across a cable. Video files need large bandwidth cables.

Buffering: The process of temporarily storing video frames before encoding or decoding for uninterrupted transmission or reception.

CIF: This is a video format that supports both NTSC and PAL signals.

CODEC: The hardware or software used to compress and decompress digital audio and/or video data.

Chrominance: The term used to specify the colors of a picture.

Decoder: The hardware or software used to convert video and audio signals for viewing.

Digital audio: This is used to refer to sound that has been encoded in a digital form for processing, storage or transmission.

Echo suppression: The process used to block echo in a videoconference.

Firewall: The hardware or software used to filter data flowing into a private network.

Full duplex: The technology that makes it possible to send data in both directions during a videoconference.

Gateway: The link that connects the Internet with a videoconferencing system.

H.261: This is the ITU standard for video coding for videoconferencing.

H.263: This is an ITU standard that defines video coding within videoconferencing.

H.264: This is an ITU standard for video compression.

H.323: This is the ITU standard for videoconferencing over networks where bandwidth is not guaranteed, such as the Internet.

H.324: The ITU standard that defines videoconferencing over standard phone lines.

Half duplex: This is used to refer to those conferencing systems in which data can only flow in one direction at a time.

Multicast: The system of routing videos over the IP for multiple users.

Jitter: The aberrations caused in video transmission on account of latency.

Latency: The time that a packet takes to move from source to destination.

Life-size: When the image size is the same as that of objects or persons.

Loopback test: The facility that allows the user to see the video and hear the audio signals that are being transmitted during a videoconference.

Lossless compression: A data compression technique in which no data is lost.

Lossy compression: The data compression technique in which some amount of data is always lost.

Luminance: The term used to describe the brightness of different portions of a picture.

MPEG: The standard used for digital video and audio compression and transmission.

Multipoint Conferencing Server: A hardware or software platform used to connect multiple users spread across multiple locations.

Packet: A unit of data transmitted across a packet-switched network.

PTZ camera: The acronym popularly used for Pan/Tilt/Zoom cameras. Such cameras can move sideways, up or down and can zoom in or zoom out.

RealAudio: A proprietary system for streaming audio (and now video) over the internet.

S-Video: The process that separates luminance and chrominance when moving a video on separate wires to improve video quality.

Streaming media: This is the process used to send video or audio over a network that the user can view or see. This data cannot be stored by the end user.

T.120: This is an ITU-T standard that provides for document conferencing. In this, two or more users can concurrently view and edit a document across a network.

Teleconferencing: The exchange of audio or video data between two users across a telecommunication network.

Transcoder: The device used to convert data stream from one format to another.

Transcoding: The term used to denote conversion of data stream from one format to another.

Unicast: The transmission of a data stream to a single user.

Video server: The machine used to store and transmit video across a network.

Voice activated switching: The system that makes it possible to switch the video feed to whoever is speaking in a multipoint videoconference.

Related posts:

1. How to ensure conference call security
2. A Beginner Buyer’s Guide to Videoconferencing Equipment
3. Finding the right conference call service
4. Multipoint Videoconferencing – What is It?
5. What you need for videoconferencing

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