GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- VI (Old) EXAMINATION - WINTER 2019
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Subject Code: 161002 Date: 12/12/2019
Subject Name: Audio - Video Systems
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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Q.1 (a) List different types of Microphones used in Audio Video Engineering and explain any two in detail. [07]
(b) Describe interlaced scanning and justify that “For interlaced scanning the total number of lines in any TV system must be odd. [07]
Q.2 (a) Compare single ended verses push-pull amplifiers. Draw and explain the circuit diagram for class-B push-pull amplifier. [07]
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(b) Draw Composite Video Signal for three consecutive lines and explain each part in detail. [07]
OR
(b) Draw the cross section of cochlea and explain each part. [07]
Q.3 (a) Define following terms with respect to audio and video systems. [07]
1) Pitch 2) Timber 3) Loudness 4) Hue 5) Saturation 6) Luminance Signal 7) Phon.
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(b) Discuss merits and demerits of Positive and Negative Modulation. [07]
OR
Q.3 (a) Explain the basics of audio compression technique. [07]
(b) Draw the block diagram of monochrome TV receiver and explain each block in brief. [07]
Q.4 (a) Write short note on colour TV pattern generator. [07]
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(b) Explain the block diagram of PAL — D decoder. [07]
OR
Q.4 (a) Why video compression is required? Explain any two video compression Techniques. [07]
(b) Discuss in detail the working principal of LED TV and LCD TV. [07]
Q.5 (a) Write short note on: Cable Television Network. [07]
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(b) With reference to colour TV receiver explain the function of following circuits. [07]
(1) Colour killer circuit (2) Comb Filter (3) Y channel delay line.
OR
Q.5 (a) Compare the characteristics of Cone Type and Horn type Speakers. Also mention their applications. [07]
(b) List the types of television systems and standard used worldwide and explain it. [07]
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