随着数字高清电视信号的播送，现有不同的显示设备就存在显示速率不匹配的问题。

With the broadcasting of HDTV signal, there exists the mismatch of display rate in different displays.

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由于显示速率小于下载速率而产生的下载视频节目的多余部分(320)会得到缓冲。

Excess portion (320) of the downloaded video program that result when a rate at which the video program is displayed are buffered.

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另一个是它们必须能够以足够快的速率来刷新图像以能够显示移动的图片。

The other is that they must be able to refresh their images at a rate fast enough to show moving pictures.

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For example, if a car is going on a racetrack and you're seeing it from the top, if the speedometer says 60 miles per hour, you might say it's not accelerating.

例如,如果一辆车在跑道上行驶,你从上面俯视它,如果速率表显示的是60英里每小时,你也许会说它没有在加速

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