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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 |
| 8644110 |
Methods and systems for spurious cancellation in seismic signal detection |
Feb. 4, 2014 |
| 8619897 |
Method and apparatus of frequency domain echo canceller |
Dec. 31, 2013 |
| 8559275 |
System and method for determining a frequency sweep for seismic analysis |
Oct. 15, 2013 |
| 8553497 |
Removal of surface-wave noise in seismic data |
Oct. 8, 2013 |
| 8064288 |
Method for passive seismic emission tomography using adaptive velocity filter |
Nov. 22, 2011 |
| 8054711 |
Method and apparatus for attenuation wind noise in seismic data |
Nov. 8, 2011 |
| 7830746 |
Method for treating seismic data corresponding to acquisitions obtained for a common zone by means of underwater seismic receivers and by means of surface receivers |
Nov. 9, 2010 |
| 7660200 |
Method for coherence-filtering of acoustic array signal |
Feb. 9, 2010 |
| 7636051 |
Status monitor apparatus |
Dec. 22, 2009 |
| 7616525 |
Method and apparatus for attenuation wind noise in seismic data |
Nov. 10, 2009 |
| 7555389 |
Creating an Absorption Parameter Model |
Jun. 30, 2009 |
| 7535955 |
Methods, algorithms, software, architectures, systems and circuitry for adaptive filtering and/or minimizing a sequence detector error rate |
May. 19, 2009 |
| 7447114 |
Non-linear seismic trace matching to well logs |
Nov. 4, 2008 |
| 7433265 |
Converted wave energy removal from seismic data |
Oct. 7, 2008 |
| 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 |
| 6446009 |
Seismic data acquisition and method for spatially filtering seismic data |
Sep. 3, 2002 |
| 6446008 |
Adaptive seismic noise and interference attenuation method |
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 |
| 5781502 |
Method and device for filtering elliptical waves propagating in a medium |
Jul. 14, 1998 |
| 5781503 |
Method for attenuating surface wavetrains in seismic data |
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 |
| 4857867 |
Method and apparatus for locking the frequency and phase of a local oscillator |
Aug. 15, 1989 |
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