113D_1_113D_1_Lab 4

113D_1_113D_1_Lab 4 - EE113D  ­ DIGITAL SIGNAL...

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Unformatted text preview: EE113D  ­ DIGITAL SIGNAL PROCESSING DESIGN L A B 4 : E X T E R NA L I N P U T S A N D VO I C E T R A N S F O R M AT I O N DURATION: 2 PERIOD STEP 1:MANIPULATING A SINE WAVE Figure out how to read the value of the dip switches on the DSK board Use a @mer interrupt to read a sample from the DSP at a rate of 8 KHz. Please appreciate the difference between using the interrupt and the while loop used before. Depending on the dip switch seAngs make the following transforma@ons onto an input sine wave. For each, display the input and the output sine wave simultaneously on the scope. o Send out the input sine wave along with an echo of it that is 1/3 the amplitude and delayed by approximately 70 milli ­second Note you may have to reduce the sampling frequency to ensure that the buffer memory in the DSP does not overflow. o Double the frequency of the sine wave o Half the frequency of the sine wave STEP 2: Figure out how to sample and store a voice signal from the microphone Depending on the dip switch seAngs make the following transforma@ons to the recorded speech and play it out of the microphone o Send out the recorded speech along with a delayed version of it at 2/3 the amplitude. The delay should be 70 mili ­seconds o Speed up the output speech by a factor of 2 and play it out of the microphone 1 o Slow down the speech by a factor of 2 and play it out of the microphone 2 ...
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This note was uploaded on 01/16/2012 for the course EE EE103 taught by Professor Jacobson during the Spring '09 term at UCLA.

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