Aethra VEGA X7 Brochure page 6

HD, THE VIDEO COMMUNICATION REVOLUTION
At the beginning videoconferencing At the beginning videoconferencing
aimed to transmit images very similar to those aimed to transmit images very similar to those
seen on television and adopted the CIF seen on television and adopted the CIF
(Common Interchange Format) 352x288. (Common Interchange Format) 352x288.
At that time, CIF was too much for the network At that time, CIF was too much for the network
bandwidth and the endpoints processing power, bandwidth and the endpoints processing power,
so Videoconferencing resolution was downsized so Videoconferencing resolution was downsized
to QCIF (Quarter CIF). to QCIF (Quarter CIF).
As the technology improved, Video Conferencing As the technology improved, Video Conferencing
became able to follow the resolution of the became able to follow the resolution of the
cameras and the displays used with the cameras and the displays used with the
endpoint equipments from QCIF to 4CIF. endpoint equipments from QCIF to 4CIF.
Until a short time ago, only interlaced cameras Until a short time ago, only interlaced cameras
and TVs (as display) were used, determining and TVs (as display) were used, determining
the way the image was captured and the way the image was captured and
transmitted. transmitted.
The introduction of the H.239 standard (Dual The introduction of the H.239 standard (Dual
Video), for content transmission, forced the Video), for content transmission, forced the
Video Conferencing equipment "to explore" Video Conferencing equipment "to explore"
the world of the progressive image scanning. the world of the progressive image scanning.
EXPERIENCE HIGH DEFINITION WITH THE VEGA X7 EXPERIENCE HIGH DEFINITION WITH THE VEGA X7
High Definition is not just technology,
it's a concept embracing Video, Voice and
Content aimed at improving comprehension
and productivity
HD dramatically improves the quality of traditional
videoconferencing systems: from 352 x 288 pixels
(standard CIF format) to 1280 x720 pixels. In terms
of mega pixels per image that's a shift from 0.101
in CIF to 0.922 in HDTV: more than 9 times better!
Truly appreciate the difference at the optimal 1 Mbps,
and see a significant improvement in quality even at
lower bandwidths.
Name
CIF
SIF
QCIF
4CIF
4SIF
480p (ED)
720p (HD)
Resolution #CIF
352x288 1
352x240 0.83
176x144 0.25
704x576 4
704x480 3.33
848x480 4.02
1280x720 9.10
Format
4:3
4:3
4:3
4:3
4:3
16:9
16:9