举一反三
- The YUV color space is composed of a luminance signal Y and two color difference signals and chrominance signals U and V. The separation of Y, U and V is to realize the color signal received by black and white TV. ( ) A: 正确 B: 错误
- The color display will use both chrominance and luminance information. A black and white display uses(74). A: neither of the two components B: the chrominance component C: the luminance component D: both of the twocomponents
- [color=#000000]在生产者消费者问题中，如果缺少了[/color][color=#000000]signal(full)[/color][color=#000000]或[/color][color=#000000]signal(empty),[/color][color=#000000]对执行结果有何[/color][color=#000000]影响？[/color]
- I prefer a color TV, I have to buy a black and white one this time.
- 在YUV亮度色差模型中，表示色差信号的是（）。 A: Y B: U C: V D: Y、U、V都是
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2. Railway signals can be divided into home signal, starting signal, distant signal, repeating signal and shunting signal.
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what is a digital signal? () A: discrete signals B: continuous signals C: both of a and b D: signals exist in the world
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[color=#000000]I don[/color][color=#000000]’[/color][color=#000000]t know how to [/color][color=#000000][u][b] [/b][/u][/color][color=#000000] the complicated situation.[/color] A: A.dealing with B: B.deal with C: C.dealt with
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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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函数 $y=\cos^3(2x+1)$ 的复合过程为 （ ）. A: $y=\cos u, u=v^3, v=2x+1$ B: $y=u^3, u=\cos v, v=2x+1$