Automatic gain control for seismic data

Details Automatic gain control for seismic data Automatic gain control for seismic data

1984-10-05

1987-01-13

Tarcza, Thomas H.

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Land-reflection type

367 38, 367 47, G01V 136

Patent

active

046369937

ABSTRACT:
An improved apparatus and method for calculating automatic gain correction to be applied to seismic samples is disclosed which features apparatus and method for calculation of the average absolute value of a window of samples in the vicinity of the sample being processed, the calculation being performed a first time with the window shifted toward a first side of the sample and a second time with the window shifted toward a second side of the sample, and selecting for use in gain correction the minimum of the two calculated average absolute values, such that high amplitude samples in the vicinity of relatively low amplitude events is precluded from causing unrealistic shadowing around such events.

REFERENCES:
patent: 2395481 (1946-02-01), Hoover, Jr.
patent: 3283296 (1966-11-01), Newton et al.
patent: 3296588 (1967-01-01), Hawkins
patent: 3924260 (1975-12-01), Braham et al.
patent: 4344158 (1982-08-01), Landrum, Jr. et al.

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