Television Engineering - Dec 17

Electronics And Telecomm (Semester 6)

Total marks: 80
Total time: 3 Hours INSTRUCTIONS
(1) Question No. 1 is compulsory
(2) Solve any three questions from the remaining five questions
(3) Draw neat diagrams wherever necessary

1(a) Compare plasma, LED, and LCD displays? (5 marks)

1(b) In TV why AM is preferred over FM for picture modulation? (5 marks)

1(c) What are the advantages of using digital technologies for television system? (5 marks)

1(d) Explain compatibility considerations in TV system? (5 marks)

2(a) Explain interlaced scanning with a neat diagram and also explain how it is better than sequential scanning? (10 marks)

2(b) Explain working of image orthicon camera tube with a neat sketch. Also state its drawbacks? (10 marks)

3(a) Explain in detail Direct to Home TV (DTH)? (10 marks)

3(b) Explain the need of chroma sub sampling. Explain various types. (10 marks)

4(a) Discuss the following terms W.R.T color transmission?
i) Luminance, Chrominance and Saturation
ii) Additive and subtractive mixing (10 marks)

4(b) Explain the following terms in relation to digital TV.
i) Aspect ratio
ii) Viewing distance and angle
iii) Digitization (10 marks)

5(a) Only (R-Y) and (B-Y) color difference signal along with luminance signal is chosen for color transmission and (G-Y) is not transmitted. Justify? (10 marks)

5(b) Compare NTSC, PAL and SECAM TV standards? (10 marks)

Q6) Write short notes on:
1) High definitions television (HDTV)
2) Chromaticity diagram
3) MUSE system
4) Color killer circuit (20 marks)