Seismic data compression: a comparative study between GenLOT and wavelet compression
نویسندگان
چکیده
Generalized Lapped Orthogonal Transform (GenLOT) based image coder is used to compress 2-D seismic data sets. Its performance is compared to the results using wavelet-based image coder. Both algorithms use the same state-ofthe-art zerotree coding for consistency and fair comparison. Several parameters such as lter length and objective cost function are varied to nd the best suited lter banks. It is found that for raw data, lter bank with long overlapping lters should be used for processing signals along the time direction whereas lter bank with short lters should be used for processing signal along the distance direction. This combination yields the best results.
منابع مشابه
Seismic data compression and QC using GenLOT
Modern seismic surveys with higher-precision numerization (24-bits A/D converters) have led to ever increasing amounts of seismic data. Management of these large datasets becomes critical, not only for transmission, but also for storage, processing and interpretation. Compression algorithms have been proposed in the geophysicists' community over the past few years as a way to e ectively manage ...
متن کاملGenLOT optimization techniques for seismic data compression
GenLOT coding has been shown an effective technique for seismic data compression, especially when compared to block-based algorithms (such as JPEG), or to wavelets. The transforms remove statistical redundancy and permit efficient compression, when used with advanced encoding techniques, such as the Embedded Zerotree Coding framework. In this work we derive a model for seismic data based on aut...
متن کاملOn Progressive Seismic Data Compression Using Genlot
Wavelet and subband coding have been shown eeective techniques for seismic data compression, especially when compared to DCT-based algorithms (such as JPEG), which suuer from blocking artifact at low bit-rates. The transforms remove statistical redundancy and permit eecient compression. This paper presents a novel use of the Generalized Lapped Orthogonal Transforms (GenLOTs) for compression of ...
متن کاملSeismic data compression using GULLOTS
Recent works have shown that GenLOT coding is a very effective technique for compressing seismic data. The role of a transform in a coder is to concentrate information and reduce statistical redundancy. When used with embedded zerotree coding, GenLOTs often provide superior performance to traditional block oriented algorithms or to wavelets. In this work we investigate the use of Generalized Un...
متن کاملA Review of Subband Coding of Seismic
In this paper, the literature published on lossy compression of seismic data using the popular subband coding technique is reviewed. The strong links between subband coding, transform coding, and the more recent discrete wavelet transform coding are described. The performance of seismic data subband coding depends on the proper choice of lter bank and frequency partitioning in the subband domai...
متن کامل