74269-mt----image & Video Compression

NR

Code No: 74269/MT

M.Tech. – II Semester Regular Examinations, September, 2008 IMAGE & VIDEO COMPRESSION (Electronics & Communications) Time: 3hours

Max. Marks:60 Answer any FIVE questions All questions carry equal marks ---

1.a) b)

What is meant by digital audio visual compression? Discuss about error visibility. Discuss about JPEG compression.

2.

Discuss in detail the H.263, MPEG-2 and MPEG-4 compressions.

3.

Discuss the following a) Transform based coding b) Basic codec structures c) Configuration of coding tools.

4.

Discuss in detail about DCT coding with suitable example.

5.

What is meant by motion estimation? Discuss clearly the overlapped-block motion estimation.

6.a) b)

Discuss about user defined quantisation matrix. Explain the layered codec structures.

7.a) b)

Discuss about half-pixel resolution motion estimation. Discuss briefly about fractal coding, and region based coding.

8.

Write short notes on the following a) MPEG-7 b) VOP bounding c) Padding. $$$