Which of the following is true about a composite video signal?

Question

Which of the following is true about a composite video signal?

1. A. It includes audio, colour, and sync information in one signal (Correct answer)
2. B. It contains only the video component with no sync or color information
3. C. It uses only one sideband in the transmission
4. D. It is used exclusively in SHF channels

Correct Answer

Option A — It includes audio, colour, and sync information in one signal

Detailed Solution & Explanation

The correct answer is It includes audio, colour, and sync information in one signal.

Key Points

• A composite video signal combines all the components needed to reconstruct the picture into a single waveform: the luminance (brightness), the chrominance (colour), and the horizontal and vertical synchronisation pulses along with blanking.
• Carrying everything in one signal is precisely what makes it *composite*, and it allows transmission over a single channel or cable.
• Option B is wrong because sync and colour are explicitly included, and Options C and D describe SSB transmission and SHF channels, which are unrelated.

Additional Information

• Component video takes the opposite approach, keeping Y, Pb and Pr on separate conductors for higher quality; S-Video is an intermediate scheme separating only luminance from chrominance.
• The sync pulses occupy the region below black level, in what is called the *blacker-than-black* portion of the waveform, so they never appear on screen.