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Unformatted text preview: 1. Truncation has the best quality. 2. Male Female Rounding 54.0802 56.688 Truncation 47.9997 52.0532 Sign Magnitude 48.2932 52.3308 For high bits, we can ignore the error. Truncation would yield the same result as rounding, but truncation does not round not round up or round down the digits. It merely cuts off at the specified digit. 3. 7 bits is min and the bits rate related is 7*8000=56000 bits. The SNR are different between male and female. Male is 24.847 and female is 28.0956. 4. Male Female 5 14.0782 16.8745 7 24.847 28.0956 9 36. 4319 39.713 12 54.0802 56.688 Female curve has the same slope with male but it is shifted up by 2dB. If we are adding one bit in the quantizer, the SNR value will be higher. 5. When Mu companding is 50, the sound is better. Yes, the SNR increase 7dB, and it is 50% increased. 6. It is because 2dB is not large enough to store a piece of sound. So, it is just storing very a few samples that not continuouslike when we play the sound. 7. 5 bits with truncation and mu=100 makes the noise less but round has a better quality and its SNR is 14.9084 which is lower than rounding one. Problem 5 1) Frequencies 1209 Hz 1336 Hz 1477 Hz 697 Hz 1 2 3 770 Hz 4 5 6 852 Hz 7 8 9 941 Hz * # 2) Frequencies for the first digit: 704 Hz, 1504 Hz #3 Frequencies for the second digit: 704 Hz, 1248 Hz #1 Frequencies for the third digit: 960 Hz, 1376 Hz #0 Frequencies for the fourth digit: 704 Hz, 1376 Hz #2 Frequencies for the fifth digit: 960 Hz, 1376 Hz #0 Frequencies for the sixth digit: 864 Hz, 1376 Hz #8 Frequencies for the seventh digit: 960 Hz, 1376 Hz #0 Frequencies for the eighth digit: 800 Hz, 1248 Hz #4 Frequencies for the ninth digit: 704 Hz, 1376 Hz #2 Frequencies for the tenth digit: 800 Hz, 1376 Hz #5 The phone number is 310 208 0425.The phone number is 310 208 0425....
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This note was uploaded on 02/09/2011 for the course EE 113 taught by Professor Walker during the Spring '08 term at UCLA.
 Spring '08
 Walker

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