TANDBERG 770 用户手册
TANDBERG Videoconferencing System
45
Advanced use
Advanced call quality
* - Requires option ‘Presenter’. To check which options are installed, see the ‘System Info’ menu in ‘Diagnostics’.
NOTE
T
HE
‘A
UTO
’
SETTINGS
ARE
RECOMMENDED
CHOICES
FOR
MOST
CASES
. T
HE
OTHER
AUDIO
,
VIDEO
AND
RESOLUTION
SELECTIONS
MADE
IN
THIS
MENU
WILL
OVERRIDE
THE
SELECTIONS
MADE
IN
THE
‘C
ALL
Q
UALITY
’
MENU
AND
ARE
NOT
RECOMMENDED
TO
BE
CHANGED
FOR
NORMAL
USE
.
Audio
Auto
Auto
The setting of ‘Audio: Auto/High/Normal’ in ‘Call Quality’ will be used.
G.722.1
Compressed high quality audio (7 kHz).
G.722
High quality audio (7 kHz).
G.728
Compressed normal quality audio (telephone quality, 3.1 kHz).
G.711
Normal quality audio (telephone quality, 3.1 kHz).
Off
No audio is transmitted.
Video
Auto
Auto
Optimized video quality depending on available bandwidth.
H.264
Bandwidth efficient video compression and decompression.
H.263
Normal video compression and decompression.
H.261
Legacy video compression and decompression.
Off
No video is transmitted.
Resolution
Auto
Auto
The setting of ‘Video: Auto/Motion/Sharpness’ in ‘Call Quality’ will be used, see tip above.
4CIF *
Digital Clarity (704 x 576 pixels), only for H263.
CIF
High resolution video (352 x 288 pixels).
QCIF
Low resolution video (176 x 144 pixels).
H.331
Off
Off
Standard two-way communication with quality negotiation between both sides.
On
Used when broadcasting a video conference from one site to many others, e.g. via satellite,
where there is no possibility to negotiate quality between the receivers and the originator due to
one-way communication.
where there is no possibility to negotiate quality between the receivers and the originator due to
one-way communication.
Status Format
Provides call quality feedback on the status line.
Auto
Provides call quality feedback on the status line.
Auto
Video off/on, Audio off/normal/high
Advanced
Shows video/audio standards (Example: Video: H261 CIF, Audio: G722).
R
ESOLUTION
, A
UTO
FUNCTIONALITY
(
IF
SUPPORTED
BY
FAR
END
):
W
HEN
‘V
IDEO
: M
OTION
’ :
L
OW
BANDWIDTHS
: CIF, SIF
H
IGH
BANDWIDTHS
:
I
CIF,
I
SIF
W
HEN
‘V
IDEO
: S
HARPNESS
’ :
4CIF, 4SIF, VGA, SVGA, XGA
TIP