Exam (elaborations)
BAPA 3.1 DIGITAL SIGNAL PROCESSING TEST
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BAPA 3.1 DIGITAL SIGNAL PROCESSING TEST...
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analog - ANSWER speech and most music are ___ signalsanalog - ANSWER ____ signals are continuous in time
no - ANSWER are analogue signals restricted in time?
no - ANSWER are analogue signals restricted in amplitude
infinite - ANSWER in analog signals there is a ____ number of values
digital - ANSWER these signals are discrete or finite
digital - ANSWER limited set of values these signals can have
discrete, equally spaced - ANSWER audio signals are sampled at _____,
_____ moments in time
Higher Fidelity - ANSWER digital signals have the possibility of making
_______ copies of the signal
degraded, NEARLY perfect - ANSWER taped copies are always ____ where
digital copies are ____
noise, degradation - ANSWER digital signals are more resistant to ____ and
_____ for storage and transmission
digital - ANSWER which system is very flexible?
1) never perfect copies of analogue signal
2) speed and cost can be factors - ANSWER name two disadvantages of digital
signals
ADC
, A/D
A to D - ANSWER name the three ways to also represent analog to digital
conversion
discrete numbers - ANSWER ADC has a representation of continuous signal
by...
electronic integrated circuit - ANSWER ADC usually performed by an...
analog, digital value - ANSWER an ADC samples the ____ signal at regular
intervals of time, and converts it into a _____
cannot - ANSWER a practical ADC____ (can or cannot) make an
instantaneous conversion
held constant - ANSWER in ADC the input value must be _____ during
conversation
each sampling period - ANSWER in ADC one value is assigned to....
continuous- time, discrete-time - ANSWER Sampling converts a _____ signal
into a ____ signal
analog signal - ANSWER the sampling rate determines how often the ____ is
sampled
throws away - ANSWER sampling ____ the info between samples
Nyquist Theorem - ANSWER in order to accurately reconstruct an analog
signal, the sampling rate should be at least two times the highest frequency
present in the analog signal.
Nyquist frequency - ANSWER half the sampling rate is called...
aliasing - ANSWER not following the nyquist theorem leads to...
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