International standards of video conference sound and image
[Video conference] in the actual purchase, in order to buy the appropriate video conferencing products, we must first understand the relevant industry standards. For now, what is the standard for video conferencing and images?
H.323(IP): image codec technology is used H261, H263 and H.264, voice codec technology is used G711 or G722, G728, G723.1, G729A. H.320 (ISDN): image codec technology is used H261 or H263, voice codec technology is used G711 or G722, G728.
1, first understand their own current network status of the company, in the domestic video conference to ensure that the uplink and downlink symmetry in 512K or more, and Europe and the United States and other countries to ensure that the video conference on the uplink and downlink symmetry above 768K.
If the network is used in the form of public network, and packet loss, delay and jitter more serious, must be network transformation, the general network delay can be controlled within 20ms, the special circumstances do not exceed 50ms.
Network packet loss is best to control within 1%, special circumstances not more than 3% (network data packet loss, with video conferencing equipment test statistics). For network traffic is relatively large network, it is recommended to network optimization or line capacity.
2, to understand what the call to use the brand, what type of equipment? Video conference image and sound codec technology which is consistent with the international video conference standards? Is compatible with our equipment?
It is particularly important to understand the other network situation, if the other side of the network bandwidth is low, even if we have enough bandwidth, the quality of video conferencing will be greatly reduced, the quality of good or bad depends on the low bandwidth of the party. 【HD video conference】
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