Signal sampling system of video communication over network usually has a low sampling rate suffering from the limited bandwidth, so aliasing noise is big problem.
受传输带宽限制，网络视频采集系统的采样率低，欠采样噪声严重。
Experiment results show that in low bit rate environment, the new image compression scheme performs better than JPEG in the aspects of perception and PSNR (Peak Signal Noise Ratio).
实验结果表明该算法在低码率下，相比jpeg，获得了在视觉效果和峰值信噪比方面更好的恢复图像质量。
On the design of classifier, by introducing support vector machine, Chinese tone recognition rate is improved under low signal noise rate conditions.
在分类器设计方面，通过引入支持矢量机，进一步提高低信噪比下的汉语声调识别率。
The process-gains of the general receivers of DS/SS can't satisfy a low bit-error-rate if the signal-noise-ratio of input signal is very low.
在输入信噪比极低的直序扩频系统中，常规的接收机获得的处理增益难以满足系统低误码率的要求。
The process-gains of the general receivers of DS/SS can't satisfy a low bit-error-rate if the signal-noise-ratio of input signal is very low.
在输入信噪比极低的直序扩频系统中，常规的接收机获得的处理增益难以满足系统低误码率的要求。
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