What are the international standards for video conferencing sounds and images?

What are the international standards for video conferencing sounds and images?

H.323 (IP): Image codec technology uses H261, H263 and H.264, and voice codec technology uses G711 or G722, G728, G723.1, G729A.

H.320 (ISDN): Image codec technology uses H261 or H263, and voice codec technology uses G711 or G722, G728.

Suggest:

1. First understand the current status of the company's current network. Whether video conferencing in China can guarantee the uplink and downlink symmetry is above 512K. Whether video conferencing with countries such as Europe and the United States can guarantee the uplink and downlink symmetry is above 768K. If the network adopts the form of public network, and the packet loss, delay and jitter are serious, the network transformation must be carried out. Generally, the network delay can be controlled within 20ms, and the special case should not exceed 50ms. The control is within 1%, and the special case should not exceed 3% (how much network data is lost, there are statistics when testing with video conferencing equipment). For networks with large network traffic, it is recommended to optimize the network or increase the capacity of the line.

2. Understand what brand and what type of equipment is used by the other party? What are the encoding and decoding technologies for video conferencing images and sounds? Is it in line with international video conferencing standards? Is it compatible with our equipment? It is especially important to understand the network situation of the other party. If the network bandwidth of the other party is low, even if we have enough bandwidth, the quality of video conferencing will be greatly reduced. The quality depends mainly on the side with low network bandwidth.