举一反三
- There are eight analog signals, each of bandwidth W=2(kHz). Samples of these signals are time-division-multiplexed, quantized and binary-coded. The step size Δ of the quantizer cannot be greater than 0.5% of the peak amplitude mp. The sampling rates (kHz) is 50% above the Nyquist rate and the minimum number of quantization levels should be . A: 6, 100 B: 12, 200 C: 24, 200 D: 48, 400
- There are eight analog signals, each of bandwidth W=2(kHz). Samples of these signals are time-division-multiplexed, quantized and binary-coded. The step size Δ of the quantizer cannot be greater than 0.5% of the peak amplitude mp. The sampling rates (kHz) is 50% above the Nyquist rate and the minimum number of quantization levels should be . A: 6, 100 B: 12, 200 C: 24, 200 D: 48, 400
- There are eight analog signals, each of bandwidth W=2(kHz). Samples of these signals are time-division-multiplexed, quantized and binary-coded. The step size Δ of the quantizer cannot be greater than A: 6, 100 B: 12, 200 C: 24, 200 D: 48, 400
- A signal s(t)=3cos(20pt) V is quantized by a uniform quantizer, the step size of the quantizer is 0.1V, then the minimal number of quantization level is Lmin=_______, the number of bits per sample is at least Rmin=_______, and the variance of the quantization error is _________V^2.
- Analog signals are characterized by continuous electrical signals in both time and value. A: Correct B: Wrong
内容
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Generally, an analog signal can be reconstructed more accurately with A: more quantization levels B: fewer quantization levels C: a higher sampling frequency D: a lower sampling frequency E: either answer (a) or (c)
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Generally,<br/>an analog signal can be reconstructed more accurately with ( ) A: more<br/>quantization levels B: fewer<br/>quantization levels C: a<br/>higher sampling frequency D: a<br/>lower sampling frequency
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Generally speaking, digital transmission can get higher signal quality than analog transmission, because? A: The repeater can regenerate digital pulses to remove signal distortion, and the amplifier amplifies the analog signal as well as the analog signal distorted B: Digital signals are smaller than analog signals and are not prone to distortion C: Analog signals are continuous and are not prone to distortion D: Digital signal is easier to sample than analog signal
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What is the correct processing sequence for acquiring and processing audio signals? A: Quantization, sampling, coding, storage, decoding, D/A conversion B: Sampling, quantization, coding, storage, decoding, D/A conversion C: Quantization, sampling, coding, storage, decoding, A/D conversion D: Sampling, quantization, coding, storage, decoding, A/D conversion
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analog signals