Which of the following is not an essential component, required for video-conferencing system?

Question

UnlockIAS · Accepted Answer

Correct — C, Telephone. Video conferencing needs to capture and show live video plus capture and play back sound. So the essential pieces are a video camera (captures your image), a display device (shows the other side's video), a microphone (captures your voice) — and a speaker plus a network connection. A telephone is not part of this set: it is a separate voice-only device and adds nothing a video-conferencing system needs. Hence it is the odd one out.

Why the other options are wrong — (a) Essential — it captures the live video of the participant, the core of a video call.  (b) Essential — a monitor/screen is needed to see the other participants' video.  (d) Essential — it captures the participant's voice so the audio can be transmitted.

Concept: A video-conferencing system links people at different locations in real time with two-way audio and video. Its essential hardware is: a camera (video input), a microphone (audio input), a display/monitor (video output), a speaker (audio output), and a network/internet connection to carry the data. Software (a codec that compresses and decompresses the audio-video) ties it together.

State PCS 2018 Q78 — Science & Technology PYQ with Answer

State PCS 2018 Q78 — Science & Technology PYQ with Answer