This is not "digital television" — it is a normal composite video signal for analog television converted to a digital format for transmission and then converted back to analog for display.

这不是“数字电视”——模拟的组合视频信号变为数字信号以利传输，由变回到模拟信号用以在模拟电视机上显示图像。

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Finally, the HD formats of digital TV have a different aspect ratio than analog TVs. An analog TV has a 4:3 aspect ratio, meaning that the screen is 4 units wide and 3 units high.

最后，高清格式(16：9)具有和模拟电视(4：3)不同的宽高比。

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Advanced undergraduate or graduate students who wish to develop a solid knowledge of analog circuit design. A basic understanding of analog circuits is assumed.

希望巩固模拟电路知识的在校的高年级本科生、研究生，此课程需要一定的模拟电路设计基础。

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As a test, I downloaded files from HDtracks.com, an online retailer specializing in hi-res audio, plugged a device known as a digital-to-analog converter (DAC) into my computer and listened over earphones.

WSJ: Sonic Truth

The idea of this Vivo X1 is that BBK wants to take audio very seriously on its new flagship phone, which is why it's been given a Cirrus Logic CS4398 digital-analog converter plus a CS8422 sample-rate converter -- a combo that's seemingly popular amongst Hi-Fi connoisseurs and manufacturers.

ENGADGET: BBK's Vivo X1 is a phone for audiophiles, packs high-end DAC and Beyerdynamic earphones

Here's the scoop: CableCard is literally a card that you pop into the back of your TV set so that you can get rid of your digital cable box and plug that coax directly into your digital TV (it's sort of like how you can use analog cable on a cable-ready analog TV without a cable box).

ENGADGET: Get ready for CableCard