. The VGA specifications give the following details for the parts of a single horizontal scan: Active Data 25.422 μs (colors!) Front Porch 0.636 μs (dark time) Sync Pulse 3.813 μs (dark time) Back Porch 1.907 μs (dark time) A. Calculate the total time for a complete horizontal scan line (sum all the parts above). Calculate the horizontal scan rate (how many scan lines per second?) expressed in kilohertz (kHz). B. Calculate the number of clock cycles for each of these parts of the signal, including the total (divide the time by the time per clock cycle, calculated in step 1). As a reality check, the data should be 640 pixels wide (remember, 1 clock cycle = 1 pixel) and the whole scan line should be 800 pixels. Round your answers to integers since we can only count in units of whole pixels. (2) 3. IBM specified that 480 of these scan lines are used to make a complete picture. Calculate the total time for these 480 scan lines (the vertical active data). Express the answer in milliseconds (ms). (10) 4. The vertical sync signal also has a front porch, a back porch, and a sync pulse as follows: Front Porch 0.318 ms (dark time) Sync Pulse 0.064 ms (dark time) Back Porch 1.048 ms (dark time) A. Convert each of these into an equivalent number of scan lines (divide by the time for one scan line, calculated in step 2A). B. Calculate the total time to complete one frame, which includes all of the scan lines. C. The total scan lines should be 525. Why is this a significant number? Answer this question in a cell in your spreadsheet. (2) 5. Calculate the frame rate (frames per second) expressed in Hz

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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. The VGA specifications give the following details for the parts of a single horizontal scan: Active Data 25.422 μs (colors!) Front Porch 0.636 μs (dark time) Sync Pulse 3.813 μs (dark time) Back Porch 1.907 μs (dark time) A. Calculate the total time for a complete horizontal scan line (sum all the parts above). Calculate the horizontal scan rate (how many scan lines per second?) expressed in kilohertz (kHz). B. Calculate the number of clock cycles for each of these parts of the signal, including the total (divide the time by the time per clock cycle, calculated in step 1). As a reality check, the data should be 640 pixels wide (remember, 1 clock cycle = 1 pixel) and the whole scan line should be 800 pixels. Round your answers to integers since we can only count in units of whole pixels. (2) 3. IBM specified that 480 of these scan lines are used to make a complete picture. Calculate the total time for these 480 scan lines (the vertical active data). Express the answer in milliseconds (ms). (10) 4. The vertical sync signal also has a front porch, a back porch, and a sync pulse as follows: Front Porch 0.318 ms (dark time) Sync Pulse 0.064 ms (dark time) Back Porch 1.048 ms (dark time) A. Convert each of these into an equivalent number of scan lines (divide by the time for one scan line, calculated in step 2A). B. Calculate the total time to complete one frame, which includes all of the scan lines. C. The total scan lines should be 525. Why is this a significant number? Answer this question in a cell in your spreadsheet. (2) 5. Calculate the frame rate (frames per second) expressed in Hz

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