What is the main disadvantage of Direct Form I and Direct Form II digital filters?

They lack hardware flexibility and are sensitive to quantization effects.

Fill in the blank: The process of altering the relative amplitudes and frequency contents of a signal is referred to as ______.

Filtering

True or False: An ideal filter passes all frequencies equally without any distortion.

False. Ideal filters have a frequency response that is real and non-negative, which can introduce distortion.

Riddle: I am a technique that transforms analog filter specifications into digital filter specifications, ensuring stability in transformation. What am I?

Bilinear Transformation

Which stability criterion requires that D(1) > 0 and (-1)ⁿ D(-1) > 0?

Jury Stability Criterion

Fill in the blank: The maximum stopband magnitude of a digital filter is denoted by ______.

A₁

What type of filter has ripples in the passband but monotonic behavior in the stopband?

Chebyshev Type I filter

True or False: FIR filters can produce a linear phase response only when they have an even number of coefficients.

False. FIR filters can produce a linear phase response with both even and odd numbers of coefficients if designed symmetrically.

Riddle: I am designed to give a desired frequency response magnitude and require careful selection of parameters for my window function. What am I?

FIR filter

In the context of digital filter design, what is the purpose of the transition band?

To allow the magnitude response to drop off smoothly between the passband and stopband.

Fill in the blank: The impulse response of an FIR filter must be ______ about its midpoint for linear phase.

Symmetric

Which type of filter has the smallest transition width and provides the sharpest cutoff?

Elliptic filter