Digital Signal Processing

ECE515EL: DSP LABORATORY Characteristics of Digital Audio Signals Digitally recorded address sound auspicates rouse be characterized in terms of the earn absolute oftenness (Fs) at which they are recorded, the depend of bits apply to represent the samples, and the number of sound channels recorded. Typical savvy frequencies used are 44100Hz (CD quality), 22050Hz (FM transfer quality), 11050Hz (AM broadcast quality), and 8000Hz (Voice or promise quality). The samples are stored as 8-bit or 16-bit numbers. In terms of the number of auditory sensation frequency channels, recorded audio betokens may need 2 channels (stereo) or 1 channel precisely (mono). Activities: 1.Play covert the following audio bear downs which are saves of a 1KHz tone. tone1K_16bit_44100Hz_mono.wav tone1K_16bit_8000Hz_mono.wav IMPORTANT: The excitenames used the audio files for the exercises indicate the number of bits, try frequency, and the number of channels. For examp le, tone1K_16bit_44100Hz_mono.wav is a mono signal recorded at 44100Hzand uses 16-bit sample representation. (a)Is there a fundamental difference in the perceived quality of the tones played rachis from the files? (b) Check the file sizes. Which audio file is larger? Approximately, how much larger is it ? absolve the difference in the file sizes?

(c)What is the theoretical minimum consume frequency, according to the Nyquist sampling theorem, that could be used in put down the audio signal? If this theoretical minimum sampling frequency had been used, how much smaller would this file be compared to the 44100Hz file? (d)Whic h do you think is more practical: sampling t! he audio signal at 44100Hz or at 8000Hz? Explain your answer. 2.Playback the following audio files which contain recordings of a voice signal. voice_16bit_44100Hz_mono.wav voice_16bit_8000Hz_mono.wav (a)Is there a probatory difference in the perceived quality of the voices played back from the files? (b)What is the theoretical...If you want to get a full essay, order it on our website: BestEssayCheap.com

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