Glossary

A2D

Analog to Digital

AAL

ATM Adaptation Layer - a framing protocol to enhance cell switched networks

AAL5

The framing protocol to turn a cell switched network into a packet switched network

ABR

Available Bit Rate - an ATM Bearer Service Class for adaptive applications to be given, dynamically, a fair share of the network.

ADSL

Asymmetric Digital Subscrber Loop - a recent way to provide Mbps over standard phone lines.

ADU

Application Data Unit - the programs view of the packet.

ALF

Application Layer Framing - a technique for designing protocols around the synchrnonsiaiton unit that is most convenient for the application

API

Application Programming Interface - a standard set of calls for the user.

ARP

Address Resolution Protocol

ARQ

Automatic Repeat Request

ATM

Asyncronous Transfer Mode (or Automatic Teller Machine) - the former is another name for cell switched networks. (The latter is another name for Sell Switching Networks)

AVT

Audio Video Transport - the IETF's working group that devised RTP.

BCH

Bose, Chaudhurie and Hocquemham signaling technique

BONDing

A technique for turning seperate ISND B channels into a higher bandwidth aggregate serial channel.

Broadband

As opposed to narrow band - use of higher capacity, generally (specifically, used to refer to use of multiple frequencies on the same trasmission medium).

CBQ

Class Based Queueing - an architecture for supporting IP QoS

CBR

Constant Bit Rate - ATM Bearer Service Class that emulates leased digital circuits

CBT

Core Based Trees - a multicast routing algorithm.

CCCP

Conference Control Channel Protocol

CDs

Compact Disk

CELLB

Sun Video Compression scheme

CELP

A high compression standard for audio.

CGBT

Core Group Based Trees, an hierarchical variant of CBT

CIDR

Classless Inter-Domain Routing - Hierarchcail aggregation of Internet Addresses

CIF

Common Interchance Format, as per H.261 video input

CLNP

Connectionless Network Protocol

CLNS

Connectionless Network Service

CMMC

Communications Multimedia Multiplexing Center

CMY

Cyan, Magenta, Yellow

CNAME

Canonical Name

CODEC

Coder Decoder.

CSCW

Computer Supported Collaborative Work

CUSeeMe

Cornell University's MAC and PC Video Conferencing Tool

Chrominance

Colour Content

Cypher

A Code

DCT

Discrete Cosine Transform - basic buildign block for H.261 and MPEG Video Compression

DHCP

Dynamic Host Configuration Protocol - An Internet Standard for configuring nomadic and mobile hosts.

DNS

Domain Name System

DRs

Designated Routers

DTS

Digital Time Service, DEC service similar to NTP

DVI

Digital Video Interactive

DVMRP

Distance Vector Multicast Routing Protocol

DoD

Department of Defence, USA

FDCT

Forward Discrete Cosine Transform Protocol

FDDI

Fiber Dual Distributed Interface - 100Mbps LAN standard

FEC

Forward Error Correction

GCC

Generic Conference Control

GSM

Groupe Spatiale Mobile

GUI

Graphical User Interface.

HDTV

High Definition Tele Vision

HPIM

Hierarchical Protocol Independant Multicast

HSV

Hue, Saturation, Value

HTML

Hypertext Markup Language

HTTP

Hypertext Transfer Protocol

HyTime

Hz

A Car Rental Company

IETF

Internet Engineering Task Force

IGMP

Internet Group Management Protocol

ILP

Integrated Layer Processing

INRIA

INSTITUT NATIONAL DE RECHERCHE EN INFORMATIQUE ET EN AUTOMATIQUE

IP

Internet Protocol

IP4

Version 4 (current) of the Internet Protocol

IP6

Version 6 (being developed) of the Internet Protocol

IPEP

The IP Encapsulating Payload

ISDN

Integrated Services Digitial Network

ITU

International Telecommunicaitons Union

IVS

INRIA Videoconferencing System

Imm

Image Multicast

JPEG

Joint Picture Expert Group

LAN

Local Area Network

LBL

Lawrence Berkeley Laboratories

LPC

Linear Predective Coding

LSA

Link State Advertisement

MBone

Multicast backBone

MCR

Minimum Cell Rate

MCS

Multipoint Communications Service

MCU

Multipoint Control Unit

MD5

Message Digest Algorithm number 5

MMCC

Multiedia Conference Control

MOSPF

Multicast Open Shortest Path First

MPEG

Motion Picture Expert Group

NACK

Negative Acknowledgement

NBMA

Non-Broadcast Multiple Access

NFS

Network File System

NTE

Network Text Editor

NTP

Network Time Protocol

NTSC

North American Television Standards Committee

PEM

Privacy Enhanced Mail

PES

Packetised Elementary Stream

PGP

Pretty Good Privacy

PIM

Protocol Independant Multicast

PNNI

Private Network Network Interface

PNOs

Public Network Operators

POV

Point of View

PSDN

Packet Switched Digital Network

PST

Pacific Standard Time

PTTs

Post, Telegraph, and Telephone

PVP

Packet Voice Protocol

QCIF

Quarter Common Interchange Protocol

QoS

Quality of Service

RDBMS

Relational Database Management System

RF

Radio Frequency

RFC

Request for Comments

RGB

Red, Green, Blue

RLJMP

Remote Leave and Join Multicast Protocol

RMP

Reliable Multicast Protocol

RP

Rendezvous Point

RPC

Remote Procedure Call

RSA

Rivest Shamir Adelman

RTCP

Real Time Control Protocol

RTP

Real Time Protocol

RTT

Round Trip Time

SCIF

Super Common Interchange Format

SDAP

Session Directory Advertisement Protocol

SECAM

Sequential Coleur a Memoire

SMDS

Switched Multi-megabit Data Service

SNR

Signal to Noise Ratio

SPF

Shortest Path First

SPI

Security Parameter Inde

SRM

Scalable Reliable Multicast

SSRC

Synchronisation Source

TCP

Transmission Control Protocol

Terabytes

A Whole Lot of Data

ToS

Type of Service

UBR

Unspecified Bit Rate

UCL

University College London

UDP

User Datagram Protocol

UI

User Interface.

UNI4

User Network Interface 4.

URL

Uniform Resource Locator

UTC

Universal Coordinated Time

VBR

Variable Bit Rate

VC

Virtual Circuit

VCI

Virtual Channel Identifier

VCR

Video Cassette Recorder

VJCC

Van Jacobson Congestion Control

VPI

Virtual Path Identifier

VPN

Virtual Private Network

VR

Virtual Reality

VRAM

Video Random Access Memory

VRML

Virtual Reality Markup Language

WAN

Wide Area Network

WWW

World Wide Web

chrominance

Colour Presece