Download GTU BE/B.Tech 2018 Winter 5th Sem New 2151101 Audio Video Systems Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-V (NEW) EXAMINATION - WINTER 2018

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Instructions:

1. Attempt all questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

MARKS

Q.1 (a) What is the meaning of the following terms pertaining to sound? 03

1. Pitch

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2. Timbre
3. Overtone.

(b) Write merits of digital television receiver. 04

(c) Explain Public Addressing System with the help of neat block diagram. 07

Q.2 (a) Prove that the approximate increase in velocity is 0.6m/s per degree Celsius 03 at room temperature.

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(b) Compare positive and negative modulated video signal. 04

(c) Distinguish between cardioid, supercardioid and hypercardioid patterns and 07 specify their applications.

OR

(c) Explain in detail along with neat sketch working and characteristics of 07 Carbon Microphone?

Q.3 (a) Define the following terms pertaining to picture: 03

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1. Saturation
2. Luminance
3. Hue

(b) Explain with reason 04

1. Why number of Lines in PAL Television is chosen to be 625 lines?

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2. Why Aspect ratio in TV is chosen to be 4/3?

(c) Draw and explain The Composite Video Signal in detail. 07

OR

Q.3 (a) With Reference to Loudspeaker define (1) Frequency Response (2) 03 Directivity (3) Efficiency

(b) Explain time compression and expansion technique of digital audio 04

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(c) Explain interlaced scanning in detail? What are its merits over simple 07 (progressive) scanning?

Q.4 (a) Draw the block diagram of B & W TV Transmitter. 03

(b) What is acoustic reverberation and explain factors on which reverberation 04 time depends

(c) Enumerate Distinguishing features of LCD colour receives when compared 07 with Plasma receives. What is ‘Slow Response Time’ and how its effect is minimized in LCD screens.

OR

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Q.4 (a) Write the difference between JPEG and MPEG types of compression 03 technique

(b) Compare front projection system and rear projection system. 04

(c) Describe with the help of a neat diagram the working of variable density 07 method of optical recording of sound on films.

Q.5 (a) Compare MP3 and Blue ray disc 03

(b) Draw and explain the working of monochrome picture tube (Vidicon). 04

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(c) With the help of neat and clean block diagram explain DTH TV Receiver 07

OR

(b) Explain in brief about troubleshooting of PA system. 04

(c) Write a short note on LED TV. 07

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