Video Compression

1. Which of the following frame patterns are valid? Give the pattern they represent (like I, B, P…)

a. (N=12, M=4)

b. (N=4, M=2)

2. Answer

a. What are the Macroblock types that are supported in B-frames?

b. I-frames and P-frames can potentially serve as anchor frames, but not all I-frames and P-frames end up being anchor frames! – Explain this assertion.

3. Answer

a. One of the disadvantages of Bi-directional coding is that the motion estimation has to consider a larger search space, why is this?

b. What is the role of the decode buffer in MPEG-1?

4. Answer (true/false)

a. MPEG’s bitstream syntax makes it impossible to implement operations like rewind and forward.

b. MPEG-4 allows objects of any arbitrary shape.

c. In MPEG the concept of a slice is used to achieve audio and video synchronization.

d. The bit-rate of 15 Mbps in the “main” level of MPEG-2 takes into account compression.