4. What is the representation of “Illini Hall” in UTF-8 and in ASCII (see e.g. h
ID: 3789986 • Letter: 4
Question
4. What is the representation of “Illini Hall” in UTF-8 and in ASCII (see e.g. http://www.fileformat.info/info/charset/UTF-8/list.htm)
Answer:
5. What is the UTF-8 representation of “ all” in UTF-8 ?
Answer:
6.
100 x 100-pixel video is 3 minutes long, in truecolor, and is 30 frames per second. There is no sound with the video. How many BYTES does the video take up on the hard disk, assuming no compression algorithm is used? Show your work.
Answer:
7. Match the numbers with the letters:
(a) resolution _________ (1) number of measurements taken per second for sound recording
(b) quantization _________ (2) number of bits used to represent colors for each pixel in an image
(c) sampling rate _______ (3) number of pixels used to represent an image
(d) bit depth ___________ (4) number of bits used to represent a sound amplitude value
8. CDs are encoded with a sampling rate of 44.1 kHz (44.1 thousand samples per second), with a quantization of 16 bits per sample. Remembering that stereo has two tracks, without compression roughly how many bits is a 3-minute song?
Answer:
9. Haptic devices transfer tactile information to a user to simulate the sense of touch. For example, the user might wear a haptic glove which has numerous "pins" each of which exerts some amount of force against the skin. Keeping in mind that for sound there is sample rate and quantization, and for images there is resolution and color depth, what two factors affect the number of bits we'd need to store to represent a particular touch "feel" that the glove will transmit to the user?
Answer:
Explanation / Answer
(1)
What is the representation of “Illini Hall” in UTF-8 and in ASCII
Ans:--> In UTF:--> 49 6C 6C 69 6E 69 20 48 61 6C 6C
In ASCII--> 073 108 108 105 110 105 032 072 097 108 108 013 010
(2) What is the UTF-8 representation of “ all” in UTF-8 ?
Ans:-->CF 80 CE B1 CE BD CF 84 CE B1 20 61 6C 6C
(3) Match the numbers with the letters:
a-->3
b-->4
c-->1
d--> 2
4-->
100 x 100-pixel video is 3 minutes long, in truecolor, and is 30 frames per second. There is no sound with the video. How many BYTES does the video take up on the hard disk, assuming no compression algorithm is used? Show your work
Given that Resolution :-- 100x100, frame rate --> 30fps length --> 3 min , Bit Depth --> True color (24 bits)
Number of Frames--> frame rate x times in sec
. 30x 3x 60 =5400 sec
file size of frame;--> (horizontal pixel xvertical pixel x bit depth)/8x1024
=100x100x24/8x1024= 29.2968 kb
file size on hard disk= 5400x 29.2968=158203.125 kb
To convert into mb = 158203.125/1024=154.495 mb
5-->
. CDs are encoded with a sampling rate of 44.1 kHz (44.1 thousand samples per second), with a quantization of 16 bits per sample. Remembering that stereo has two tracks, without compression roughly how many bits is a 3-minute song?
Answer:
16 bits per sample x 44,100 samples per second = 705,600 bits per second x 2 channels = 1,411,200 bits per second of stereo
Since the length the audio track is 3 min--> 1411,200 x 3 x60= 254,016,000
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