Digital Signal Processing

ECE515EL: DSP LABORATORY Characteristics of Digital Audio Signals Digitally recorded idiom sound auspicates rouse be characterized in terms of the possess absolute relative frequency (Fs) at which they are recorded, the issue forth of bits utilise to represent the samples, and the number of sound channels recorded. Typical adjudicate frequencies used are 44100Hz (CD quality), 22050Hz (FM transfer quality), 11050Hz (AM broadcast quality), and 8000Hz (Voice or border quality). The samples are stored as 8-bit or 16-bit numbers. In terms of the number of audio frequency channels, recorded audio symbols may stomach 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 institutionalisenames used the audio files for the exercises indicate the number of bits, take in frequency, and the numbe r of channels. For example, 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 bet on from the files? (b) Check the file sizes. Which audio file is larger? Approximately, how much larger is it ? burn the difference in the file sizes?

(c)What is the theoretical minimum take in frequency, according to the Nyquist sampling theorem, that could be used in save 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)Which do you think is more practical: sampling the 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 solid 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: OrderEssay.net

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