Huawei TE40 Administrator's Manual page 175

HUAWEI TE40&TE50&TE60 Videoconferencing
Endpoint
Administrator Guide
H.263
H.264
H.323
half-duplex
hang up (site)
HD
hide video
Issue 01 (2013-09-30)
presentation) within a single session (call).
H.263 is a video codec standard originally designed as a low-bitrate
compressed format for videoconferencing. It was developed by the
ITU-T Video Coding Experts Group (VCEG) in a project ending in
1995/1996 as one member of the H.26x family of video coding
standards in the domain of the ITU-T. H.263v2 (H.263+) added
support for flexible customized picture formats and custom picture
clock frequencies. Previously the only picture formats supported in
H.263 had been Sub-QCIF, QCIF, CIF, 4CIF, and 16CIF, and the
only picture clock frequency had been 30000/1001 (approximately
29.97) clock ticks per second.
H.264/AVC/MPEG-4 Part 10 (Advanced Video Coding) is a standard
for video compression. The final drafting work on the first version of
the standard was completed in May 2003. H.264/AVC is the latest
block-oriented motion-compensation-based codec standard developed
by the ITU-T Video Coding Experts Group (VCEG) together with the
ISO/IEC Moving Picture Experts Group (MPEG), and it was the
product of a partnership effort known as the Joint Video Team (JVT).
The ITU-T H.264 standard and the ISO/IEC MPEG-4 AVC standard
(formally, ISO/IEC 14496-10 - MPEG-4 Part 10, Advanced Video
Coding) are jointly maintained so that they have identical technical
content. H.264 is used in such applications as Blu-ray Disc, videos
from YouTube and the iTunes Store, DVB broadcast,
direct-broadcast satellite television service, cable television services,
and real-time videoconferencing.
H.323 is a recommendation from the ITU Telecommunication
Standardization Sector (ITU-T) that defines the protocols to provide
audio-visual communication sessions on any packet network. The
H.323 standard addresses call signaling and control, multimedia
transport and control, and bandwidth control for point-to-point and
multi-point conferences.
A transmitting mode in which a half-duplex system provides for
communication in both directions, but only one direction at a time
(not simultaneously). Typically, once a party begins receiving a
signal, it must wait for the transmitter to stop transmitting, before
replying.
Hang up a remote site and remove the site from the conference.
Refers to a video system of higher resolution than standard-definition
(SD) video, most commonly at display resolutions of 1280× 720
(720p) or 1920× 1080 (1080i or 1080p, full HD). High definition
(HD) refers to an increase in display or visual resolution of television
formats (HDTV), high definition video (used in HDTV broadcasting,
digital film and computer HD video film formats), high definition
multimedia interface (HDMI), an all-digital audio and video interface
capable of transmitting uncompressed streams and other formats for
recording and transmitting visual and audio communications.
During a conference, a site can hide its video to prevent other sites
from viewing the video of the site.
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E Terminology
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