Quiz05-Sec2-sol - EE380 Communication Systems Spring...

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EE380 – Communication Systems Section 2 – SET 1 Spring 2010-2011 Quiz Number 5 – Solutions Open Book; Open Notes Time Given=10 minutes (Apr 11, 2011) “I certify that I have neither received nor given unpermitted aid on this examination and that I have reported all such incidents observed by me in which unpermitted aid is given.” Signature Name Student ID Problem 1: An old black-and-white webcam is generating video data and sending it to a display, frame after frame at a rate of 24 frames per second. Each frame is generated with a resolution of 40 pixels × 30 pixels. Each pixel can take one of the four possible values (to indicate the greyscale intensity). (a) [4pts] At what rate (in bits/sec) is the webcam sending the data? Solution: 24 × 40 × 30 × log 2 4 = 57600 bits/sec (b) [4pts] If the data is sent from webcam to the display using 512-ary baseband digital signalling, what is the minimum channel bandwidth needed to support this communication? Solution:
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Quiz05-Sec2-sol - EE380 Communication Systems Spring...

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