Download GTU BE/B.Tech 2019 Summer 6th Sem Old 161002 Audio Video Systems Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 6th Sem Old 161002 Audio Video Systems Previous Question Paper

1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI(OLD) ? EXAMINATION ? SUMMER 2019
Subject Code:161002 Date:21/05/2019
Subject Name: Audio - Video Systems
Time:10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

Q.1 (a) Draw the circuit diagram of the class B push pull amplifier and explain it. Derive
the equation of efficiency for it. Also explain all distortion regarding class B
push pull amplifier.
07
(b) What do you mean by Resolution? Explain Horizontal & Vertical resolution.
Prove that maximum Video frequency that need to be handled in 625 line TV
system is 5 MHz.
07

Q.2 (a) Draw the cross section of cochlea and explain each parts of it. Also explain
mental process.
07
(b) Enlist the characteristics of Digital Audio Broadcasting. Also write its
advantages and disadvantages.
07
OR
(b) What is sampling? How quantizing is useful? Also draw and explain PCM
system in detail.
07

Q.3 (a) Explain Crossover Networks in detail. 07
(b) Explain preamplifier and its requirement. 07
OR
Q.3 (a) Draw the Composite Video signal for at least three Horizontal lines and explain
it in detail
07
(b) Explain Interlaced scanning in detail with scanning sequence diagram. 07

Q.4 (a) Draw block diagram for separation of U and V colour phasor signals and explain
it.
07
(b) Sketch the details of horizontal blanking and sync. pulses. Label on it :
i. Front porch ii. Horizontal sync pulse iii. Back porch
Explain significance of each portion.
07
OR
Q.4 (a) Why vestigial sideband transmission is used in TV? Explain Vestigial sideband
transmission in detail. What are the merits & demerits of VSB transmission?
07
(b) Which modulation system is used for Picture and Sound in TV?Why? Also
explain Positive and Negative modulation. Enlist the advantages of Negative
modulation.
07

Q.5 (a) Explain Interference suffered by TV signal in detail. 07
(b) List the types of Television systems and standard used worldwide and explain
it in detail.
07
OR
Q.5 (a) Draw the block diagram of VHF Tuner and explain it in detail. 07
(b) Explain HDTV in detail. 07

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