CS 584 - Real Time Multimedia Computer Networking
Homework 1

Due: See class webpage.

The following questions are related to the papers:

Question 1

• Can pyramid broadcast be used in live video transmission ? If yes, explain why, if no, explain why not. (6 pts)

• Suppose the video data consumption rate is 1 Mbps. We use pyramid broadcast to transmit 100 video objects and each video object is 100 min in length. The total bandwidth of the transmissin medium is 1 Gbps.

If we divide the video objects into 4 fragments, what is the maximum size ratio between the successive fragments so that the receiver will not be disrupted (10 pts) ?

And if we divide the video objects into 10 fragments, what is the maximum size ratio between the successive fragments so that the receiver will not be disrupted (10 pts) ?

Question 2

Suppose the video data consumption rate is 1 Mbps. We want to broadcast 100 video objects and each video object is 100 min in length. The total bandwidth of the transmissin medium is 1 Gbps.

• What is the access time if we use the staggered broadcast method ? (10 pts)

• Suppose we use the pyramid broadcast method and divide the video objects into 4 fragments. What is the access time ? (8 pts)

• Suppose we use the pyramid broadcast method and divide the video objects into 5 fragments. What is the access time ? (8 pts)

• We use the pyramid broadcast method and divide the video objects into 10 fragments. What is the access time ? (9 pts)

• Suppose we use the skyscraper broadcast method to broad cast the video objects What is the access time ? (25 pts)