In videoconferencing, CODEC is defined as what?

• A. A software tool for code compilation.
• B. A digital imaging sensor.
• C. A network router.
• D. Acronym for coder-decoder; the videoconferencing device that converts analog video and audio signals to digital and vice versa.

Answer: (D)

In videoconferencing, CODEC refers to the coder–decoder that handles encoding and decoding audio and video streams for transmission and playback. Its job is to compress the media data into a format suitable for sending over a network and then decompress it so the receiving end can render the media in real time. This can be implemented as hardware or software, and it may sit with cameras and microphones or operate as a standalone component. It’s not a tool for compiling code, a camera sensor, or a network router, which is why the description that emphasizes encoding/decoding of media streams is the best fit.