AMIETE – IT (NEW SCHEME)   -   Code: AT65

 

Subject: MULTIMEDIA SYSTEMS

Flowchart: Alternate Process: JUNE 2010Time: 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 the best alternative in the following:                                  (210)

       

a.  Cubase is a/an ________________ program.

 

(A) image editing                                  (B) music sequencing

            (C) video editing                                   (D) animation                                                       

 

             b. The basic strategy of ___________ is to trade intensity resolution for spatial resolution.   

 

                  (A) compression                                   (B) dithering                                  

                  (C) expansion                                       (D) authoring

 

             c.  This color model employs subtractive color primaries.

 

                  (A) RGB                                              (B) CMY

                  (C) YIQ                                               (D) YUV

 

             d.  The aspect ratio of HDTV is _______.

 

                  (A) 4:3                                                 (B) 16:9                                                                            

                  (C) 3:4                                                 (D) 9:16

 

             e.  If the frequency band of DAT is 24 kHz, the data rate for a stereo channel with 16 bits per sample is ________.

                                           

                  (A) 8 kB/sec                                        (B) 88.2 kB/sec

                  (C) 192 kB/sec                                    (D) 1200 kB/sec

 

  f.   The entropy of the image in which 1/3 of the pixels are dark and 2/3 of them are bright is_____.

            

                  (A) 0.92                                               (B) 1.02

                  (C) 1.32                                               (D) 0.75

 

             g.  The lower right quadrant of the wavelet transform contains

  

(A)  Horizontal edges.                           (B) Vertical edges.                                                             

(C) Diagonal edges.                             (D) Mixed edges.

 

             h.  _________ is a texture coding technique for boundary macroblocks in MPEG 4 video compression technique.

            

                  (A) DFT                                               (B) KLT

                  (C) Shape adaptive DCT                      (D) Wavelet transform

 

             i.   A _________ message is sent to a set of specified nodes.

                 

                  (A) broadcast                                       (B)  multicast                                                                     

                  (C) recast                                             (D)  unicast

 

             j.                                                               On a standard 74-minute CD, the total amount of storage is ___________

 

                  (A) 10 MB                                           (B) 747 MB

                  (C) 4.7 MB                                          (D) 4.7 GB

                 

 

Answer any FIVE Questions out of EIGHT Questions.

Each question carries 16 marks.

 

 

  Q.2     a.   Describe the following image file formats:

                   (i) TIFF                                               (ii) GIF

                   (iii) PS & PDF.                                                                                                (10)

                                                                             

             b.   Calculate the storage required for a 640  480

                   (i)   monochrome.                                (ii) gray-scale.

                   (iii) color image.                                                                                                 (6)

            

  Q.3     a.   Explain the following color models in video.

                   (i) YIQ                                                (ii) YCbCr                                              (8)

                                                                             

             b.   Describe NTSC and CCIR standard for analog-digital video. Calculate the data rate for this standard.                                                                   (8)

                                                                                                                                                

  Q.4           a.                                                        Explain the dictionary based LZW algorithm. Suppose the alphabet is the set of symbols {0, 1}. Show the dictionary and output for LZW compression of the input 0 1 1 0 0 1 1.                                                                                                                         (8)

 

             b.   Describe lossless predictive coding of audio. Suppose a predictor is given by and the error  is transmitted. Encode the sequence {21, 22, 27, 25, 22} given that the initial value of 21 is transmitted uncoded.                                          (8)

                  

  Q.5     a.   Given a DC signal with a magnitude of 100, evaluate the discrete cosine transform.                                                                (8)

                                                                                                                                                

             b.   Explain the different JPEG modes.                                                                      (8)

                                                                             

  Q.6     a.   Describe the H.261 digital video compression standard with neat block diagrams of the encoder and decoder.                                                                                                          (10)

       

             b.   What is scalable coding? Explain spatial scalability in MPEG-2.                          (6)

 

  Q.7     a.   Compare VOP-based coding with frame based coding with examples.                (6)          

             b.   Describe the Linear Predictive Coding technique for coding voice. Write a fast algorithm to calculate the LP coefficients.                                         (10)

 

  Q.8     a.    Explain in detail the Layer 3 of MPEG audio compression algorithm.                   (8)

 

             b.   Describe the various parameters for maintaining Quality of Service (QoS) in multimedia data transmission.                                                              (8)

            

  Q.9     a.   Explain the following techniques of creating animation:                                            

                   (i) Interpolation                                    (ii) Inverse Kinematics                             (8)

 

             b.   Describe DVD providing its specifications. Compare DVD with CD.                  (8)