DSP-Structure of IIR filter - direct form I, II

Which of the following is a widely used structure for implementing IIR filters that requires the fewest number of multipliers?

• Direct Form I
• Direct Form II
• Cascade realization
• Parallel realization

In Direct Form I structure of an IIR filter, where are the feedback and feedforward coefficients applied?

• Feedback coefficients in the feedback path, and feedforward coefficients in the feedforward path
• Feedforward coefficients in the feedback path, and feedback coefficients in the feedforward path
• Feedback coefficients in both the feedback and feedforward paths
• Feedforward coefficients in both the feedback and feedforward paths

Which of the following is a desirable property of Direct Form II realization of an IIR filter?

• Reduced sensitivity to coefficient quantization
• Lower computational complexity
• Higher numerical stability
• Ability to implement higher-order filters

What is the advantage of using a Cascade realization of IIR filters?

• Ability to implement higher-order filters with lower computational complexity
• Improved frequency response
• Improved phase response
• Reduced sensitivity to coefficient quantization

Which of the following is a common technique to reduce round-off errors in the implementation of IIR filters?

• Quantizing the coefficients to higher precision
• Quantizing the input signal to higher precision
• Using double-precision arithmetic
• Truncating the coefficients to lower precision

What is the advantage of using a Parallel realization of IIR filters?

• Ability to implement multiple filters in parallel
• Improved frequency response
• Improved phase response
• Reduced sensitivity to coefficient quantization

Which of the following structures is commonly used for implementing IIR filters in digital signal processors (DSPs)?

• Direct Form I
• Direct Form II
• Cascade realization
• Parallel realization