Решение в MathCAD
For the following, assume that no data compression is done, although in practice this would almost never be the case. For (a) to (c), calculate the bandwidth necessary for transmitting in real time:
(a) Video at a resolution of 640×480, 3 bytes/pixel, 30 frames/second.
(b) Video at a resolution of 160×120, 1 byte/pixel, 5 frames/second.
(c) CD-ROM music, assuming one CD holds 75 minutes’ worth and takes 650 MB.
(d) Assume a fax transmits an 8×10-inch black-and-white image at a resolution of 72 pixels per inch. How long would this take over a 14.4-kbps modem?
For the following, assume that no data compression is done, although in practice this would almost never be the case. For (a) to (c), calculate the bandwidth necessary for transmitting in real time:
(a) Video at a resolution of 640×480, 3 bytes/pixel, 30 frames/second.
(b) Video at a resolution of 160×120, 1 byte/pixel, 5 frames/second.
(c) CD-ROM music, assuming one CD holds 75 minutes’ worth and takes 650 MB.
(d) Assume a fax transmits an 8×10-inch black-and-white image at a resolution of 72 pixels per inch. How long would this take over a 14.4-kbps modem?