Students in a class in New Delhi have been communicating with a class in Chandigarh by videoconference. The two classes find that the images they receive from each other occasionally freeze for up to 30 seconds before the video continues. This type of problem can most often be solved by

Freezing images during a video call signal that the network cannot deliver frames quickly enough, so widening the connection is the direct remedy.

Extra bandwidth gives the compressed video stream room to travel without buffering, so the picture flows continuously instead of pausing.

Better cameras sharpen what is captured at each end but leave an overloaded link just as congested.

Raising video resolution enlarges every frame and consumes still more capacity, deepening the freeze.

Newer monitors change only how the arriving image is shown, not how fast it reaches the screen.

Real-time video needs steady throughput and low latency, which is why a jittery link stalls far more than a plain file transfer.