Question 1)a) With the help of suitable example, explain the rules which are followed to construct the Huffman code tree for a transmitted character set.
b) Describe the principle of operation of the LZW compression algorithm and how this is dissimilar from the LZ algorithm.
Question 2)a) With the help of suitable example frame sequences, describe the meaning of the following kinds of compressed frame and the reasons for their use:
i) I-frames
ii) P-frames
iii) B-frames
b) With the help of suitable diagram, describe the operation of a basic DPCM signal encoder and decoder. Also include in your description the source of errors which can arise.
Question 3)a) Write down the reasons why standards are essential for networked applications involving different computer/ and systems.
b) Describe the working of circuit switched networks.
Question 4) Explain different multimedia file formats with their applications.
Question 5)a) What is the meaning of the term “enterprise network”? Explain the factors which determine when such networks are created.
b) What does TCP/IP stand for? Describe. Give a correspondence between the layers of OSI reference mode l and those of internet model.
Question 6) Define the meaning, bit-rate and use of the following PSTN high-speed access technologies:
a) IDSL
b) HDSL
c) SDSL
d) ADSL
e) VDSL
Question 7)a) Explain in detail different bandwidth and compression issues involved in multimedia communication.
b) Explain source encoding.
Question 8) Write brief notes on:
a) Application support functions.
b) Challenges for encryption and decryption.