Fast updates are a mechanism used to quickly redraw the image. Since it has to sent the entire image quickly.. typically it will be at a lower picture quality.. this is what you see as 'pulsing' in the video as the image gets blurry, and then sharpens up as more detail is sent after the fast update.
Remember, the video codecs we use today operate by sending the differences between frames. So the entire image is not sent all the time.. just part of the image. The changes are then added/whatever to the existing picture.
If you are missing a bunch of information, your system will have a hard time rebuilding the picture.. so it will ask for a full refresh of the picture so it has something clean to work with. This is an example of the FAR-END asking for a fast update request.
However, Fast updates are also normal when the system has to quickly change the entire image.. like when you switch camera sources. So Fast updates are normal.. when they are not, is when a system persistantly keeps asking for Fast updates.
In the case of packet loss, often a codec will request a Fast Update Request (FUR) when it don't have enough info to draw its picture properly.. so it requests a new full image.
The 2021 IT Blog Awards, hosted by Cisco, is now open for submissions. Submit your blog, vlog or podcast by Friday, December 3.
To learn what's new in this year's competition or to gain insights into the judging considerations, check out t...
Greetings, Wanted to share a few lessons learned while migrating from a distributed to centralized IMP deployment. Our current setup included many CUCM/IMP distributed clusters with centralized Expressway server for MRA login. We did not wish to perf...
Parsec's Cisco UCCE/PCCE CC Connector application for CRM works as a bridge between the CRM and Cisco UCCE/PCCE CC solution.The CRM can be any cloud based CRM like Salesforce (SFDC), ServiceNow ,MS Dynamics or a 3rd party CRM.The CRM user/Agent will have ...
It’s a feature which allows CUCM to determine whether the phone is in its home location or a roaming station.By enabling this feature users can roam from one site to another site and acquire the site-specific settings such as Codecs, MRGL, Call rout...