Unformatted text preview: coefficient quantization and run-length coding for I-blocks and P/B-blocks? 5. What are the different modes in a block-based hybrid video coder? How do they each operate on a macroblock? 6. Which mode is most efficient for a block that is part of a moving object that has appeared in the previous frame? Which mode is most efficient for a block that corresponds to part of an object that first appeared in this frame, and continues in the next frame? Why don’t we use P or B modes all the time? Why is I-mode needed? 7. Why are compressed video streams sensitive to transmission errors? What are some simple ways to make the bit streams more resilient to transmission errors? What are we trading-off when increasing the error resilience? 8. What does scalability mean in video coding? Why is scalability desirable in practical applications?...
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- Fall '07
- DIGITAL VIDEO, Video compression, Yao Wang, block-based hybrid video