Question

Why there is a delay of 5 to 10 second in any live telecast?

Answer 1

    Reason:  Latency time durations of electronic hardware circuits.

     For any live telecast the video from the cameras is captured and converted into digital data signals. The data is optimized. It is then encrypted. Further there is a modulation over the Giga Hertz carrier. Here in this process there is some switching also taking place.

   Multiple TV sources from multiple users could be using same channel towards the satellite. Then satellite receives it. Transponders receive. Processing takes place. Amplification of received signal takes place. Then the signal is beamed back onto Earth.

     Then antennas receive the signal. The electronic boxes at residences or offices process the signals. They amplify. They remove noise. They do some video image signal processing. Then they send to the TV to display. TV also delays a little before it can display. Because electronics in it have to respond to changes in the input signal.

   During this process the various electronic items take small times like 0.1 second or more. The electromagnetic wave signal takes a little time to travel to the satellite and back. That duration is negligible compared to the delays by hardwares everywhere on the path.

   That is why there is a delay of perhaps 4 to 5 seconds. You can also observe that if the same signal is received by two different channels, there is a small time gap between them.

   It is called the latency time of the electronics.

Answer 2

Step-by-step explanation:

Nowadays, due to the digital processing required to provide the viewer with digital television, there is a delay of several seconds before the viewer sees what occurred live.” The radio and “over-the-air” broadcasts of decades ago were, in a way, more live than current live television.