RADVision SCOPIA VC240, Руководство пользователя

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E: VIDEO TESTS SUMMARY
A basic videoconference between two SCOPIA® VC240 systems produced very
good results at 720p resolution. During an H.239 conference the high resolution PC
images were restricted, however, by the low frame rate of 2-3 frames per second.
This restricts the type of material that can successfully be shared. When H.239 was
received from other vendors’ systems a higher frame rate of between10-15 frames
per second was achieved.
The fixed focus lens high definition camera coped well with difficult lighting
conditions.
F: AUDIO TESTS SUMMARY
The echo canceller is fully automatic in operation. The quality of echo cancellation
and doubletalk from the system was very good. While a participant was speaking
the integral microphone generated significant background noise, but when
participants stopped talking, the CODEC’s Noise Gating feature produced silence.
This contrast was distracting. Using an external headset microphone did reduce this
effect but background noise was still evident.
Lecture Theatre Room
Audio levels adequate? (Yes/no) Not tested Yes
Audio quality acceptable? (Yes/no) Not tested Yes
Echo cancellation acceptable?
(Yes/no) Not tested Yes
Quality of double talk Not tested Very Good
G: CONNECTIVITY
H.323
There were no problems connecting between the SCOPIA® VC240
units over IP.
Time to Connect
H.323
All speeds 3 seconds
During an H.323 call the network connection was removed and reconnected after a
specific time.
5 Seconds Picture froze - successful reconnection, call does not terminate
15 Seconds Picture froze - successful reconnection, call does not terminate
30 Seconds Picture froze - successful reconnection, call does not terminate