Chapter 6

Chapter 6

P. 1

We achieve a data rate of 56 kbps in a 23 channel using a DS-1 format by sending 7 bits per channel, and because each frame is repeated 8000 times per second.

P. 3

a. 8 x 10 = 80 x 1200² x 10 = 1152000000 bits = 144000000 bytes

It would take 144,000,000 bytes to store a bit map of an 8 by 10in monochrome picture at 1200 dpi with a 10- bit gray scale.

b. 2³⁰=1,073,741,824

30/3 = 10

The least value of n to provide over 1 billion colors is 10.

c. 7 x 11 x 1200² x 30 = 3,326,400,000

It would take 3,326,400,000 seconds to send the picture over a T-1.

P.4

a. 7 x 11 x 2400²= 443,520,000 bits = 55440000 bytes

It would take 55440000 bytes to store the material.

b. 443,520,000 / 19,200 = 23100sec/3600 = 6.42 hr

It would take 6.42 hr to send the file.

P. 5

30 x 6 + 1= 181 x 8000

The bit rate is 1448000.