Systems Architecture
7th Edition
ISBN: 9781305080195
Author: Stephen D. Burd
Publisher: Cengage Learning
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A movie having a screen resolution of 1366*768 pixels, usually played at 30 frames per second, uses 4 bytes/pixel. This movie needs to be streamed over amedium. Find the time taken to stream the movie, given that the length of the movie is 1 hour, and the medium used is:
(i) 10Base-5(ii) 100Base-TX
1. A color image uses 18 bits to represent a pixel. Compute the maximum number of different colors that can be represented?
2. For n devices in a network, determine the number of cable links required for a mesh, ring, bus, and star topologies?
3. Color pictures are to be downloaded at the rate of 900 pictures per minute. Compute the required bit rate of the channel. Assume each picture consists of 768 (height) x 1280 (width) color pixels. Each color pixel value is specified by 24 bits.
4. The loss in a cable is usually defined in decibels per kilometer (dB/km). If the signal at the beginning of a cable with - 0.5 dB/km has a power of 24 mW, determine the power of the signal at 18 km?
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Computer Science
8.
In multimedia applications, buffers are very important to deal with jitter, what is the best buffer size (B)
1.
the size of 1 packet
2.
equal the maximum jitter
3.
the same size as the streamed video
4.
Zero (no buffer is needed)
- In streaming multimedia using UDP, the video source generates frames at the rate of 30 frames per second, what is the transmission rate (send rate )
1.
we cannot use UDP with video streaming
19-
Wirless networks have higher packet loss/delay due to bit-errors (discarded packets, delays for link-layer retransmissions), and handover loss
True
false
2.
30 frame per second
3.
variable rate
4.
1 frame per second
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