基于改进的JPEG2000算法的二维心电信号压缩 - docin.com豆丁网 种信号压缩算 法性能的好坏主要有两个个关键的指标：压缩比和信号重建质量【14】。 （1）信号压缩比 信号压缩比（CompressionRatio，CR）的物理意义是压缩压缩前信号的字节数与压 缩后信号的字节数的百分比。其定义如下： CR，—vor—ig
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实验结果表明，在信号压缩比和信号重建质量与同类研究结果可比的情况下，编码速度有了很大的提高。
Experimental results show that the encoding speed is greatly increased, whereas the signal compression ratio and the quality of reconstructed signals are comparable to that of similar research.
实验表明，利用语音信号本身特征，达到高压缩比同时具有较高合成语音质量是可能的。
Experiments show that high quality speech coding systems can be realized by utilizing the characteristics of speech signals.
当原始数据的信噪比较低时， 阈值的选择受大振幅噪音的影响，使压缩比略有下降，但仍然能够保持信号基本不失真。
The results showed that, enen with compression ratio of more than 200, the data could be reconstracted with out significant loss of useful signals by the method.
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