Although these methods can control and reduce the noise in most measurements, some techniques just prevent noise from entering the system, whereas others remove only extraneous noise from the signal.
虽然这些方法在大多数测量中能控制和减少噪声，但是一些技术只是防止噪声进入系统，而其他只是去除信号中的外来噪声。
Any noise characteristic of the preamp circuit is attenuated along with the signal, unlike circuits where the volume control is before the input.
与一些音量控制置于输入端的电路不同，这个前级放大器的特征噪声能够随同信号一起衰减。
Active noise control (ANC) is a new high technology integrated with acoustic, adaptive control and digital signal process and it has become the research focus center of noise control.
主动噪声控制是集声学、自适应控制及数字信号处理等技术为一体的高新技术，已成为国内外噪声控制界的研究热点。
By predicting the noise in the loop the delay of noise signal in digital feedback loop is compensated effectively, thus the control capability of the system on disturbance is enhanced.
通过在回路中对噪声进行预测，有效地补偿了数字反馈回路造成的噪声信号的延迟，从而改善了系统的扰动控制性能。
Because engine noise takes on complicated frequency characteristics, if original noise signal is not collected, the noise control effect will not be evident.
由于发动机噪声的频率成分比较复杂，如果采用主动降噪技术不能适时采集到源噪声信号，就达不到理想的降噪效果。
On the other hand, signal-to-noise ratio is estimated to provide a switching and power control and channel allocation algorithm for the channel quality information.
另一方面信噪比估计提供了切换，功率控制和信道分配算法所需的信道质量信息。
It can be used as adaptive control of video signal. These real-time processing system contain real-time noise reduction, realtime detection of moving targets, edge detection and others.
该噪声值可以用于视频降嗓器、运动目标检测和图像边缘检测等实时系统，对视频信号进行自适应处理。
It can be used as adaptive control of video signal. These real-time processing system contain real-time noise reduction, realtime detection of moving targets, edge detection and others.
该噪声值可以用于视频降嗓器、运动目标检测和图像边缘检测等实时系统，对视频信号进行自适应处理。
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