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# Business Communications Essay

585 words - 3 pages

Sample HW
1. Use the ASCII code to indicate the 7-bit code representation for the following: 1 pt each
A. H 1 0 0 1 0 0 0_

B. s 1 1 1 0 0 1 1

C. ! 0 1 0 0 0 0 1

D. k 1 1 0 1 0 1 1

2. Now, add odd parity to each of the codes in problem 1A and 1B above, placing the parity bit in the most significant digit. Add even parity to each of the codes in problem 1C and 1D above, placing the parity bit in the most significant digit. 1 pt each

A. H 1 1 0 0 1 0 0 0

B. s 0 1 1 1 0 0 1 1

C. ! 0 0 1 0 0 0 0 1

D. k 1 1 1 0 1 0 1 1

3. What are the capabilities of even single bit parity? 1 pt each

A. It can detect the presence of errors when there are how many errors present? It can detect ...view middle of the document...

10011110
• 128 + 0 + 0 + 16 + 8 + 4 + 2 + 0 = 158

5. Determine the binary representation for each of the following decimal numbers. 1 pt each
A. 129
10000001

B. 247
11110111

C. 75
01001011

6. How many bits are needed to uniquely represent a code that contains:
1 pt each
A. 32 different symbols
- 5
B. 47 different symbols
- 6
C. 158 different symbols
- 8

7. The DC-5 digital camera provides an uncompressed video stream output with a per frame resolution of 480 x 360 pixels. The camera has a frame rate of 45 fps. The camera also has a capability of depicting 512 different colors for each pixel. 1 pt each
A. How many bits are required to represent each pixel?

9 bits/ pixel

B. What is the minimum bit rate required to satisfactorily transmit this camera’s uncompressed bit stream?

480 x 360 = 172,800 pixels/frame
172,800 pixels x 9 bits/pixel = 1,555,200 bits/frame
45. rames/ second rate = 69,984,000 bps

C. How much data storage is required to store in bytes 3 minutes of video shot by this camera?
69,984,000 bps x 60 seconds/minute x 3 minutes ÷ 8 bits/Byte = 1.57464 x 109 Bytes
8. An 8 x8 data matrix has been received as shown below. The parallel parity bits are shown, assuming EVEN parity. Determine if any errors are present, and IF POSSIBLE, correct them., 1 pt

1 0 1 1 0 1 0 0 0

0 1 0 1 1 1 1 0 1

1 0 0 1 0 1 1 0 0

0 0 0 0 1 0 0 0 1

1 0 1 0 1 0 1 0 0

0 1 1 0 0 0 1 0 1

1 0 1 0 0 1 1 1 0

0 0 0 1 1 0 0 1 1

0 0 0 1 0 0 1 0 1

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