| 摘要 |
In a digital seismic data processing system the reflected seismic signals are received in analog form. An analog-to-digital converter samples or measures at equal time intervals the analog signals and converts the sampled signals into a sequence of digital numbers. By the process of digital filtering, arithmetic operations are then used to multiply consecutive values of the digital numbers by a prescribed set of numbers and to add the resulting products together. This invention contemplates also using the process of digital filtering to produce a digital feedback signal which is converted into an analog feedback signal. The analog feedback signal is combined in real time with the arriving, noise-containing, analog seismic signal to substantially completely remove the noise from the arriving raw signal prior to processing it through the seismic data processing system.
|
