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中国大学MOOC答案
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The higher the sampling frequency, the closer the discrete digitized sound wave is to its original waveform.
The higher the sampling frequency, the closer the discrete digitized sound wave is to its original waveform.
中国大学MOOC答案
数据帝
2024-04-09
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A、正确
B、错误
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正确
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Audio files in WAV format do not use compression algorithm, so they have good sound restorability, strong stereoscopic impression and relatively large file capacity.
Generally speaking, the higher the sound quality is required, the higher the quantization level and the lower the sampling frequency is.
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数据帝
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Generally speaking, the higher the sound quality is required, the higher the quantization level and the lower the sampling frequency is.
Audio files in WAV format do not use compression algorithm, so they have good sound restorability, strong stereoscopic impression and relatively large file capacity.
MPEG video compression standards include MPEG-1, MPEG-2, MPEG-4, MPEG-7 and MPEG-21.
Which is incorrect among the following statements about the “masking effect”?
在任何时候换路定则都是成立的。
动态电路指含有动态元件的电路,描述电路的方程是微分方程。
换路定则指出,流过电容的电流和电感两端的电压在换路前后保持不变。
电容元件和电感元件都是储能元件。
初始值特指换路后瞬间电容两端的电压和流过电感的电流。
如图所示电路原来已稳定,开关K在
t
=0时打开,试求?
特勒根定理只适用于 ( )
如图所示电路中仅由电阻组成,图(a) 当10V电压源与端口11
‘
相接,测得输入电流,输出电流;若如图(b)将电压源移到22
‘
端口, 且在11
‘
端跨接2Ω电阻,试求此时2Ω电阻的电压。