Code: C-21 / T-12                                                                 Subject: MULTIMEDIA SYSTEMS

Time: 3 Hours                                                                                                     Max. Marks: 100


NOTE: There are 9 Questions in all.

·      Question 1 is compulsory and carries 20 marks. Answer to Q. 1. must be written in the space provided for it in the answer book supplied and nowhere else.

·      Out of the remaining EIGHT Questions answer any FIVE Questions. Each question carries 16 marks.

·      Any required data not explicitly given, may be suitably assumed and stated.



Q.1       Choose the correct or best alternative in the following:                                         (2x10)


a.       H.261 supports the following video formats.


                   (A)  SIF                                              (B)  CIF

(C)    QCIF                                          (D)  CIF and QCIF


b.      An audio signal of telephone quality is sampled at the rate of 8000 samples per second and uses 8 bit quantization.  The data rate in this case is:


(A)    4 KB.                                          (B)  8 KB.

(C) 16 KB.                                         (D)  64 KB.


             c.   The bandwidth of NTSC  TV is of the order of:


(A)    4 KHZ                                         (B)  6 MHZ

(C)  12 MHZ                                      (D)  60 KHZ


             d.   The compression ratio of MPEG1 frame is higher for:


(A)  I frames.                                       (B)  P frames.

(C)  B frames.                                     (D)  All are equal


             e.   The network bandwidth/bit rate requirement of CD quality audio is of the order of:


(A)     16 kpbs                                       (B) 32 kpbs

(C) 64 kpbs                                        (D) 128 kpbs


             f.    The maximum distance for ADSL using twisted pair copper wire of 0.5 mm diameter for a data rate of 6.1 Mbps is of the order of


(A) 3.7 km                                          (B)  37 km

(C) 0.37 km                                        (D)  No limit


             g.   Which of the following is temporal media?


(A)     Images                                         (B)  Audio

(C)  Graphics                                      (D)  Text


             h.   A text book contains 300 pages with 30 lines per page and 100 characters per line.  What is the size of data of this book?


(A)    900 Kbytes                                  (B)  90 Kbytes

(C)  9 Megabytes                                (D)  90 Megabytes


             i.    An optical scanning consists of a light source, a document holder and____.


(A) Sound detector                              (B)  Light detector

(C)  Heat detector                               (D)  All


             j.    Which of the following image processing techniques be used for converting a coloured image to black and white image?


                   (A)  Composition                                 (B)  Warping

                   (C)  Contrast stretching                        (D)  Enhancement Averaging.



Answer any FIVE Questions out of EIGHT Questions.

Each question carries 16 marks.


  Q.2     a.   Distinguish between temporal data and non temporal data with examples?           (4)


             b.   Explain about channel messages and system messages in MIDI devices.              (6)


             c.   What are the various aspects of speech analysis?  Explain.                                  (6)


  Q.3     a.   What is entropy encoding?  Explain how do you prepare DCT AC and DC coefficients for entropy encoding?                                                                                                          (8)


             b.   Distinguish between motion dynamics and update dynamics.                                (4)


             c.   Explain Huffman coding.                                                                                    (4)


  Q.4     a.   Briefly explain DVI.                                                                                           (5)


             b.   Explain the audio encoding scheme in MPEG.                                                     (5)


             c.   Explain details of channel vocoder and formant vocoder.                                     (6)


  Q.5     a.   Draw and explain the block diagram of a JPEG encoder with all the relevant details.                       (12)


             b.   What is Video Object Plane (VOP)?  Distinguish between IVOP and PVOP.                    (4)


  Q.6     a.   What are the characteristics of real time systems?  Explain with particular reference of multimedia applications?                                        (6)


             b.   Explain first come first serve (FCFS) disk schedule algorithm with an example as applied to multimedia.                                                                 (10)



  Q.7     a.   What do you understand by network protocol?                                                  (2)


             b.   Explain the details of resource reservation (RSVP) protocol.                               (7)


             c.   Write brief notes on voice over IP.                                                                     (7)


  Q.8           “An MDBMS can be characterized by its objectives when handling multimedia data”.  List out these objectives and explain each one briefly.                                                            (16)


  Q.9     a.   Distinguish between live and synthetic synchronization.                                        (5)


             b.   Explain what do you understand by DMIF?                                                        (5)


             c.   Explain the difference between continuous media data and discrete data in terms of real time characteristics, file size and multiple data streams.        (6)