JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech IV MULTIMEDIA AND SIGNAL CODING Previous Question Paper (November/December - 2018 - R15)
Note: This question paper contains two parts A and B. Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks and may have a, b, c as sub questions.
Part A
What is meant by Multimedia?
Answer
Multimedia is the integration of multiple forms of media, such as text, graphics, audio, video, and animation, into a single interactive information system or presentation.
What is the purpose of Out-of-Gamut colors?
Answer
Out-of-gamut colors refer to colors that exist in a source color space but cannot be accurately reproduced by the target output device (such as a printer or monitor). Their purpose is to identify these unrepresentable colors so that gamut mapping techniques, such as clipping or compression, can be applied to map them to the nearest reproducible color within the device's capability.
Name the different types of Video signals.
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What are the advantages of Interlaced Video?
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What is Entropy?
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What is the purpose of a Llyod Max Quantizer?
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What are the disadvantages of B-frames?
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What are the enhancements of MPEG-1 compared with MPEG-2?
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Define Phase insensitivity.
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What is meant by Psychoacoustics?
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Part B
What are the components of Multimedia? Explain.
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Explain about World Wide Web.
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Explain about CIE chromaticity diagram with a neat sketch.
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Briefly discuss about the different image file formats used for exchange of information.
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Explain about Analog video with neat diagrams.
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What is meant by DPCM? Explain the block diagrams of Encoder and Decoder of DPCM.
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Digital Video used Croma Subsampling. What is the purpose of this sampling? Why is it feasible?
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State and explain Nyquist Theorem.
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A source emits five symbols {A, B, C, D, E, F, $} with probability of {0.3, 0.6, 0.3, 0.9, 0.8, 0.2, 0.5}. Construct an arithmetic code to encode the code word ‘CAE$’.
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Discuss the main steps of JPEG2000 Image compression standard.
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Explain about Lossless JPEG compression.
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Describe Wavelet Based Coding with necessary equations.
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With a neat diagram explain the encoder and decoder of H.261 compression standard. Why is a loop filter used in H.261 standard only?
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Explain the differences between MPEG-I layer III audio coding and MPEG-2 NBC coding.
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Explain the concept of profiles and levels in MPEG-2.
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Explain about Inter frame and Intra Frame coding in H.261 standard.
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Briefly discuss about the G.726 ADPCM technique used for compressions of speech signals.
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Explain the basic algorithm of MPEG audio compression.
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Explain about LPC vocoders used for extracting features from Speech.
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Discuss the advantage of using an algebraic codebook in CELP coding.
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