Methods for compressing and decompressing raw digital SAR data a

Details Methods for compressing and decompressing raw digital SAR data a Methods for compressing and decompressing raw digital SAR data a

1995-08-03

1997-08-26

Young, Brian K.

Coded data generation or conversion

Digital code to digital code converters

H03M 700

Patent

active

056614772

ABSTRACT:
In a method for compressing raw digital SAR data input data are first coded with fewer bits by means of an adaptive block quantization (BAQ) and subsequently vectors are formed from the block-quantized data. The vectors are coded by a special mapping table in order to achieve an effective data reduction. In a method for decompressing digital data, vectors are generated from the coded data by means of a code book table, from which scalar values are formed. After de-standardization of the scalar values, decoded data are obtained in that the scalar values are multiplied for the de-standardization by the standard deviation of each block already calculated during coding.

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Macdonald Dettwiler, "Data Encoding Techniques Study", vol. 1: SAR Study, Apr. 1992.

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