Fig. 14.
Two line graphs comparing the Delay ms versus Frames for a video chat application FaceTime. Graph a shows relatively stable latency over a WiFi network with an average of 214ms, while graph b shows higher and more varied latency over a 4G network with an average of 277ms.

CDD of video chat sessions measured with the QR-code. (a) Facetime application over a WiFi network and (b) Facetime application over a 4|G network.

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