Title :
Seismic data compression using adaptive filters
Author :
Fargues, Monique ; Stearns, Samuel D. ; Coutu, Gerard
Author_Institution :
Dept. of Electr. & Comput. Eng., Naval Postgraduate Sch., Monterey, CA, USA
Abstract :
This paper describes a technique for waveform data compression. The technique is a variation on a two-stage lossless method that was developed by one of the authors. Whereas the earlier work employed a special version of the classical linear predictor in its first stage, the present method uses a lossless successive difference operation combined with an adaptive differential pulse code modulation-type (ADPCM) scheme to output a integer residual sequence for transmission, storage, or further encoding. The present method was found to operate best by taking the fourth difference of the data. Two ADPCM implementations are considered; the basic FIR filter scheme and a frequency selective scheme proposed earlier. To reconstruct the original integer data, only the first four unfiltered data values and the initial adaptive filter parameters are needed in addition to the integer residual sequence. The proposed adaptive scheme is compared to that of the linear predictor for seismic data. Results show that the original integer sequence can be recovered without loss
Keywords :
FIR filters; adaptive filters; adaptive signal processing; data compression; differential pulse code modulation; geophysical signal processing; seismology; FIR filter scheme; adaptive differential pulse code modulation; adaptive filter parameters; adaptive filters; frequency selective scheme; geophysical signal processing; integer residual sequence; lossless successive difference operation; seismic data compression; two-stage lossless method; unfiltered data values; waveform data compression; Adaptive filters; Data compression; Data engineering; Dynamic range; Encoding; Finite impulse response filter; Frequency; Modulation coding; Propagation losses; Pulse modulation;
Conference_Titel :
Circuits and Systems, 1994., Proceedings of the 37th Midwest Symposium on
Conference_Location :
Lafayette, LA
Print_ISBN :
0-7803-2428-5
DOI :
10.1109/MWSCAS.1994.518970