Question

Consider teleconferencing using Voice over IP (or Video chat) apps to talk to friends, relatives, and colleagues in different countries. Describe how a video chat app works

- answer must describe an appropriate range of computer science concepts

- answer must illustrate the concepts with a suitable example

- answer must explain how the computer system or data format works

- answer must predict how different technical choices or situations affect the system

Answer 1

A video chat app works by capturing audio and video data, encoding it into digital format, breaking it down into packets, and transmitting it over the internet. Different technical choices or situations can affect the quality and performance of the app.

Step-by-step explanation:

A video chat app works by using Voice over IP (VoIP) or video streaming technology to transmit audio and video data over the internet. Here is a step-by-step explanation of how a video chat app works:

Sender's device captures audio and video using a microphone and camera.

• The audio and video data are encoded into a digital format.
• The encoded data is broken down into small packets.
• The packets are transmitted over the internet using IP (Internet Protocol).
• The receiver's device receives the packets and decodes them back into audio and video.
• The audio and video data are played back on the receiver's device.

Different technical choices or situations can affect the video chat app. For example, the quality of the internet connection can impact the video and audio quality. The choice of video codecs and compression algorithms can affect the bandwidth usage and the quality of the video. The devices used, such as the camera and microphone, can also affect the overall experience of the video chat.