Glossary - A Practical Guide to Video and Audio Compression - page 730

Topic Description

H.281 A standard that defines local and remote camera control for

video-conferencing systems.

H.320 A higher bit-rate ITU standard for video-conferencing via ISDN

or through a reserved portion of the bandwidth available on a
T1 connection.

H.323 This is an ITU standard for video-conferencing that takes place

over networks that don't guarantee an available bandwidth. The
Internet is such a network; the traffic may be transferred in
bursts and must be interleaved with traffic following completely
different point-to-point connections. Compliant
implementations must also support H.261 video content. Suited
to use on TCP/IP networking over LAN and WAN connections
and via the Internet.

H.324 An ITU standard that describes video conferencing taking place

over standard telephone lines.

HDCAM A Sony tape format for recording high-definition TV.

HD-Mac High-Definition Multiplexed Analog Component. A standard for

HD that was being developed for analog systems in Europe. It
fell by the wayside and was such an unsatisfactory and
expensive experience that it has discouraged companies from
taking up HD in Europe until now.

Helix An open-source project initiated by RealNetworks to make

video-streaming servers and production systems more widely
available.

Hi8 The Sony 8mm tape format designed for consumer use. Hi8 is

an analog format.

Home Media Server A domestic server for storing large bulk quantities of audio,

video, and other media for consumption in the home.

Home Theater System A system for presenting movies in a cinema-like fashion at

home. This might be a stand-alone system or a client on a
network built around a home media center.

HSL Hue Saturation Lightness. A way of describing color as an

alternative to using red, green, and blue values.

HTTP: Hyper-Text Transfer protocol. The means by which Web

browsers request content from Web servers. This is a protocol
that describes how to request some data and how it will be
delivered back by the responder.

IEE Institute for Electrical Engineers.