The performance of the digitaldetector used in cable receive channel has been improved obviously.
用于地震勘探电缆接收道的数字检波器，其性能已有了很大提升。
2
In this paper, the basic principle of geophone detector and the frequency characteristics of SN-4 digitaldetector are briefly introduced.
简要介绍地音探测器的基本原理，SN - 4数字检波器的频率特性。
3
A new digital watermark detector is proposed in this paper, which is based on attacks characteristics complementary between different image processings.