DELTA MODULATION - CS

Which of the following is a disadvantage of delta modulation?

• A. High complexity
• B. Requires a high SNR
• C. Low efficiency
• D. Limited resolution

What is the basic principle of delta modulation?

• A. It quantizes the difference between the input and the predicted output
• B. It quantizes the input signal directly
• C. It quantizes the output signal directly
• D. It uses pulse width modulation to encode the signal

Which of the following is an application of delta modulation?

• A. Audio signal processing
• B. High-resolution imaging
• C. Speech recognition
• D. Data encryption

How does the step size affect the output signal in delta modulation?

• A. It affects the resolution of the output signal
• B. It affects the sampling rate of the output signal
• C. It affects the number of quantization levels
• D. It affects the bit rate of the output signal

What is the purpose of the predictor circuit in delta modulation?

• A. To produce an estimate of the input signal
• B. To produce an estimate of the output signal
• C. To quantize the input signal
• D. To quantize the output signal

Why is a low-pass filter used in demodulation of delta modulated signals?

• A. To remove the high-frequency components introduced during modulation
• B. To remove the low-frequency components introduced during modulation
• C. To remove the DC offset introduced during modulation
• D. To remove the noise introduced during modulation

If the step size of a delta modulator is too large, what would be the effect on the output signal?

• A. The output signal would have low resolution
• B. The output signal would have high resolution
• C. The output signal would have low SNR
• D. The output signal would have high SNR

A delta modulator has a step size of 0.2 V and a maximum signal amplitude of 2 V. What is the maximum number of quantization levels?

• A. 10
• B. 11
• C. 100
• D. 101

What is the bit rate of a delta modulator that samples an analog signal at 8 kHz and uses 4 bits to quantize the signal?

• A. 16 kbps
• B. 32 kbps
• C. 64 kbps
• D. 128 kbps

In what type of applications would delta modulation be a suitable choice of modulation technique?

• A. Applications that require high bit rates
• B. Applications that require high resolution
• C. Applications that can tolerate high noise
• D. Applications that require high SNR