Homework 7

Due: See class webpage.

The following questions are related to the papers:

- "Pyramid Broadcasting for Video on Demand Service", ( click here)
- "Skyscraper Broadcasting: A New Broadcasting Scheme for Metropolitan Video-on-Demand Service", ( click here)

**Question 1**

- What are the advantages of pyramid broadcast ? (7 pts)
- What are the disadvantages of pyramid broadcast ? (7 pts)
- 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)