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Go Back Video conferencing / Telepresence Forum > Connectivity > Standards > Video Switching vs Transcoding
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Old 02-06-2009   #1
harts112
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Default Video Switching vs Transcoding

What is the difference between Video Switching, Transcoding and Continuous presence in regards to the MGC manager software? I am just trying to find out if I should be using a particular one for certain types of calls, like IP, ISDN or IP/ISDN mixed?

Any input would be greatly appreciated.
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Old 02-07-2009   #2
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Video Switching requires all endpoints to connect at same speed and video algorithms. Those that do not match the conference parameters will connect audio only, no video. The video cards are not used for the processing of the video streams.
Transcoding/Continuous Presence allows each endpoint connecting to be a different speed or video algorithm. The video stream is generated by the video cards and transcoded to whatever format each endpoint is using. Transcoding screen layout is one site only whereas Continuous Presence can have all the different screen layouts available.

If the sites don't want split screen layouts and are all using the same type/model of codecs at the same rate, the Video Switching requires less processing by the MCU (video in - video out) and may provide better video quality. However, if you have a myriad of codec types/models and the sites have different network capabilities (1 BRI, 3 BRI's etc) then Transcoding or Continuous Presence will help ensure the full connection of all sites and a successful conference.
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Old 02-09-2009   #3
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Thanks for the valuable info, that will help out alot in the future.
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Old 01-06-2012   #4
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Hello friends,
this is really good info..i also want to know this thanks again
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Old 06-29-2016   #5
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Default Not Much to Add

I think @Joe Vallender pretty much nailed it... there's not much more you could add to that without making it overly complicated. If you need more tips on anything video, though, you can check out the Valoso blog (Google it). I have found lots of valuable articles there. Anyway, hope this helps for future reference!
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