Fremgangsm?te, apparat og system for
datakomprimering
申请(专利)号： NO19960004764
专利号： NO964764A 主分类号： E21B47/12 申请权利人： WESTERN ATLAS
INTERNATIONAL INC 公开国代码： NO 优先权国家： US
摘 要：
A plurality of sensors, each of which is coupled to a data channel, are mounted on a downhole logging tool for periodically measuring and sampling, at preselected timed sample intervals, petrophysical characteristics of the borehole sidewall material. The sample values are arranged in a two-dimensional array of a plurality of time series in channel-sequential order, indexed by consecutive sample number. Means are provided for transforming the plurality of time series from the time domain to the wavelet domain. The
wavelet coefficients for each transformed time series are compressed by
thresholding. The compressed wavelet coefficients corresponding to each time series are transmitted to a receiver where the compressed wavelet coefficients are decompressed by formatting same into a broken sequence of wavelet coefficients. The original time series is reconstructed by inversely transforming the broken
sequence of wavelet coefficients from the
申请日： 1996-11-08 公开公告日： 1997-05-15
分类号： E21B47/12 发明设计人： LI, XUGUANG
申请国代码： NO
优先权： 19951114 US
55761795
摘 要 附 图：
wavelet domain back to the time domain. 主权项：
权 利 要 求 说 明 书
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Fremgangsm
