• 2022-06-07
    中国大学MOOC: 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 .
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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