作者icybleach (覚醒多面体)
看板Grad-ProbAsk
标题Re: [问题] 计组
时间Thu Apr 9 21:01:56 2009
※ 引述《loeooo (篮球狂)》之铭言：
: Assume that we wish to compress a gigital video file using MPEG-1 technology.
: The target bit rate is 2Mbps. If the video is displayed at a resolution of
: 352 x 240 at 30 frames per second using 24 bits to represent each color,
: what is the necessary compression ratio to achieve the desired bit rate?
题目希望的 bit rate 为 2Mbps (Mega bits per sec)
而原 video 的 bit rate 为 352 x 240 x 30 x 24 = 60825600 bps
故压缩比为 2000000/60825600 ≒ 3.3%
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还真小...
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