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Class Information
Number: 367/45
Name: Communications, electrical: acoustic wave systems and devices > Seismic prospecting > Land-reflection type > Signal analysis and/or correction > Filters > Adaptive filters
Description: Subject matter wherein the signal selecting characteristics of the filter are varied by the signal fed into the filter itself.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7327633 |
Systems and methods for enhancing low-frequency content in vibroseis acquisition |
Feb. 5, 2008 |
| 7089119 |
Acoustic signal processing method using array coherency |
Aug. 8, 2006 |
| 6801473 |
Method for estimating and removing artifact noise from seismic data |
Oct. 5, 2004 |
| 6757217 |
Method for time-aligning multiple offset seismic data volumes |
Jun. 29, 2004 |
| 6691073 |
Adaptive state space signal separation, discrimination and recovery |
Feb. 10, 2004 |
| 6651007 |
Adaptive seismic noise and interference attenuation method |
Nov. 18, 2003 |
| 6636816 |
Vector signal analysis method and apparatus therefor |
Oct. 21, 2003 |
| 6519205 |
Ground roll attenuation method |
Feb. 11, 2003 |
| 6446008 |
Adaptive seismic noise and interference attenuation method |
Sep. 3, 2002 |
| 6446009 |
Seismic data acquisition and method for spatially filtering seismic data |
Sep. 3, 2002 |
| 6373396 |
Method for predicting seismic events |
Apr. 16, 2002 |
| 5986973 |
Energy minimization in surface multiple attenuation |
Nov. 16, 1999 |
| 5982706 |
Method and system for determining normal moveout parameters for long offset seismic survey signals |
Nov. 9, 1999 |
| 5971095 |
Noise filtering method for seismic data |
Oct. 26, 1999 |
| 5781503 |
Method for attenuating surface wavetrains in seismic data |
Jul. 14, 1998 |
| 5781502 |
Method and device for filtering elliptical waves propagating in a medium |
Jul. 14, 1998 |
| 5771203 |
Seismic prospection method with application of a self-deconvoluted prediction error filter |
Jun. 23, 1998 |
| 5684754 |
Method and system for correcting seismic traces for normal move-out stretch effects |
Nov. 4, 1997 |
| 5594706 |
Downhole processing of sonic waveform information |
Jan. 14, 1997 |
| 5572483 |
Method of reducing noise in seismic signals by adaptive filtering of a noise reference |
Nov. 5, 1996 |
| 5555530 |
Method for improving signal to noise ratio |
Sep. 10, 1996 |
| 5528555 |
System and method for compensating for towed array motion induced errors |
Jun. 18, 1996 |
| 5448531 |
Method for attenuating coherent noise in marine seismic data |
Sep. 5, 1995 |
| 5349527 |
Method of seismic time migration using a massively parallel computer |
Sep. 20, 1994 |
| 5251183 |
Apparatus and method for marine seismic surveying utilizing adaptive signal processing |
Oct. 5, 1993 |
| 5229765 |
SP noise cancellation technique |
Jul. 20, 1993 |
| 5209237 |
Method and apparatus for detecting a signal from a noisy environment and fetal heartbeat obtaining method |
May. 11, 1993 |
| 5191526 |
Method for removing coherent noise from seismic data |
Mar. 2, 1993 |
| 5060202 |
Method for removing coherent noise from seismic data through T-K filtering |
Oct. 22, 1991 |
| 5050226 |
Ultrasonic echographic imaging device utilizing an improved adaptive filter |
Sep. 17, 1991 |
| 5050130 |
Signal processing to enable utilization of a rig reference sensor with a drill bit seismic source |
Sep. 17, 1991 |
| 4967401 |
Method of acquiring and interpreting seismic data to obtain lithological parameters |
Oct. 30, 1990 |
| 4964087 |
Seismic processing and imaging with a drill-bit source |
Oct. 16, 1990 |
| 4926391 |
Signal processing to enable utilization of a rig reference sensor with a drill bit seismic source |
May. 15, 1990 |
| 4890264 |
Seismic exploration method and apparatus for cancelling non-uniformly distributed noise |
Dec. 26, 1989 |
| 4858199 |
Method and apparatus for cancelling nonstationary sinusoidal noise from seismic data |
Aug. 15, 1989 |
| 4857867 |
Method and apparatus for locking the frequency and phase of a local oscillator |
Aug. 15, 1989 |
| 4809238 |
Method for restoring the background appearance of two-dimensional filtered seismic data |
Feb. 28, 1989 |
| 4797668 |
Acoustic well logging system having multiplexed filter digitizing |
Jan. 10, 1989 |
| 4783660 |
Signal source distortion compensator |
Nov. 8, 1988 |
| 4757516 |
Transversal equalizer |
Jul. 12, 1988 |
| 4750157 |
Seismic vibrator earth impedance determination and compensation system |
Jun. 7, 1988 |
| 4750156 |
Noise suppression during seismic exploration |
Jun. 7, 1988 |
| 4740929 |
Method for suppressing noise in seismic data |
Apr. 26, 1988 |
| 4709357 |
Method and apparatus for acoustically investigating a borehole casing cement bond |
Nov. 24, 1987 |
| 4700300 |
Indicating barehole rugosity as a function of the difference between shallow and deep log indices |
Oct. 13, 1987 |
| 4692909 |
Adaptive seismic signal processor |
Sep. 8, 1987 |
| 4679174 |
Method for seismic lithologic modeling |
Jul. 7, 1987 |
| 4630246 |
Seismic-acoustic low-flying aircraft detector |
Dec. 16, 1986 |
| 4630242 |
Adaptive and non-adaptive method for estimating the earth's reflection sequence |
Dec. 16, 1986 |
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