The colour TV picture signal is a

Question

The colour TV picture signal is a

1. A. single-channel, one-dimensional signal
2. B. three-channel, three-dimensional signal
3. C. three-channel, one-dimensional signal
4. D. single-channel, three-dimensional signal (Correct answer)

Correct Answer

Option D — single-channel, three-dimensional signal

Detailed Solution & Explanation

The correct answer is single - channel, three - dimensional signal.

Key Points

• The official JKSSB answer key marks Option D.
• On this reading the colour TV picture signal is treated as one composite channel — a single waveform transmitted over one carrier — that conveys three dimensions of information: the two spatial dimensions of the image plus time.
• The luminance and the two chrominance components are combined into that single transmitted signal rather than being sent separately.

Additional Information

• Many textbooks describe the colour picture signal instead as three-channel, one-dimensional (Option C), counting the three colour components as channels and time as the single dimension. Candidates should be aware that both descriptions appear in the literature.
• In practice the three components are Y (luminance) and the colour differences U and V, multiplexed into one composite video signal.