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这主要是来自于设计的不同目标,mpeg2设计要求是在Mbit/s的码流下进行传输,而mpeg4追求的是低码流(4800-64000)下的数据传输。由于算法的改进(引入AVObject等),虽然是有损压缩,但还原能力很高。BTW,和可变码率无关
flipflop
(翻云覆雨)
(#167311@0)
Last Updated: 2001-8-15
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懂 MPEG 1-2-4 标准的同学请举手~~~~~ 有问题要问!!!
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