Sichuan Mobile HD conference (6M conference rate) main site reflect that picture of a branch site delay severely. There is trailing smear on active picture of this site.
1. Check network quality in the branch site, test line of 3＊E1 to IP, all is normal;
2. Check video protocol of this terminal, which is H.263 CIF. It is the same with that in main site, no exception.
3. Check camera parameter configuration. When camera display local picture, there is obvious delay. So, there is camera parameter configuration problem. Handing process:
(1) Backup camera current parameter, then INITIALIZE SET, initializes parameter. The picture do not delay anymore, but it display effect is dark and monochrome.
(2) Debug parameter, when charge time=1/3s, there is trailing smear again. When charge time =off, picture resume back to normal. So, picture delay is caused by inappropriate parameter configured.
(3) There are reasonable configuration parameters below for reference:
AUTO GAIN UP ON
AUTO DN(ELC) ON
CHARGE TIME OFF
CHROMA LEVEL 1
FLESH TONE 1
WHITE BAL ATW
ATW SPEED MID
1. Network transmission failure;
2. Wrong video protocol;
3. Panasonic 3CCD camera fault.
Through analysis location of this failure, Panasonic camera inappropriate parameter configured cause conference picture delay. There are other customers using Panasonic camera. Hope this case can help other video conference engineers.