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Some observations on data compression for digital strong-motion accelerograms

Peng, Chia-Yen and Iwan, W. D. (1990) Some observations on data compression for digital strong-motion accelerograms. Bulletin of the Seismological Society of America, 80 (2). pp. 252-266. ISSN 0037-1106. https://resolver.caltech.edu/CaltechAUTHORS:20140814-083625256

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Abstract

This paper presents the results of a study of data compression for digital strong-motion accelerograms. The general characteristics of a class of data compression algorithms based on time history interpolation are discussed. Six particular compression/decompression algorithms are examined in detail. In four of these algorithms only peaks are recorded with different interpolation schemes being used to recover, or decompress, the original acceleration waveform between peaks. The compression/decompression algorithms based on peaks only are observed to result in generally unacceptable errors that are nonuniform in both the time and frequency domain. The remaining two algorithms are based on selectively sampling the data with a prescribed accuracy control. This approach is termed backward successive approximation (BSA). The algorithms store only those points between peaks which are required to maintain the desired accuracy. One algorithm also incorporates a complementary differential bit reduction (DBR) scheme to further reduce the storage required. An optimum balance between accuracy and degree of compression is achieved when the BSA and DBR schemes are combined.


Item Type:Article
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http://bssa.geoscienceworld.org/content/80/2/252.abstractPublisherArticle
Additional Information:© 1990, by the Seismological Society of America. Manuscript received 24 April 1987. This work was supported in part by the National Science Foundation and in part by Kinemetric Systems, Inc., whose assistance is greatly appreciated by the authors. The opinions expressed are those of the authors and do not necessarily reflect those of the supporting agencies or organizations.
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Kinemetric Systems Inc.UNSPECIFIED
Issue or Number:2
Record Number:CaltechAUTHORS:20140814-083625256
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140814-083625256
Official Citation:Chia-Yen Peng and W. D. Iwan Some observations on data compression for digital strong-motion accelerograms Bulletin of the Seismological Society of America, April 1990, v. 80, p. 252-266
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:48541
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:14 Aug 2014 20:59
Last Modified:03 Oct 2019 07:04

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