Question

In a CD recorder, the stage that combines digital data with error control and sync word is:

• A. ADC
• B. Filter
• C. Multiplexer
• D. Laser unit

Hint:

Multiplexers combine data streams with control and sync bits to prepare data for recording or transmission.

Answer 1

The Correct Option is C

In a CD recorder, the multiplexer stage combines the digital data with additional information such as error control codes and synchronization (sync) words. This ensures that the data can be accurately read and corrected for errors during playback. The multiplexer effectively packages the raw data into a format suitable for encoding and recording on the CD. Other stages perform different functions:
- ADC (Analog-to-Digital Converter) converts analog audio signals to digital form.
- Filter removes unwanted frequencies or noise.
- Laser unit writes the data onto the CD surface using laser beams.