Coded data generation or conversion – Digital code to digital code converters – To or from differential codes
Patent
1995-06-19
1997-02-11
Williams, Howard L.
Coded data generation or conversion
Digital code to digital code converters
To or from differential codes
341 60, 341 63, H03M 700
Patent
active
056025505
ABSTRACT:
A method and apparatus for compressing a data vector of a predetermined number of data points. The apparatus includes a memory for storing the compressed data vector, a first comparator for determining a largest and smallest data point of the data vector and a second comparator for comparing the largest and smallest data point and when they are equal, causing a first data point of the data vector to be stored in the memory as the compressed data vector. The apparatus also includes a first processor for determining a data field width necessary to uniquely describe a largest relative magnitude data point and a second processor for storing the data points of the data vector as the compressed vector in data fields of memory of the data field width. The apparatus also includes a comparator and register for creating a difference vector of difference values of adjacent data points of the data vector, a first processor for determining a data field width necessary to uniquely describe a largest magnitude difference value of the difference vector, and a second processor for storing the difference points of the difference vector as the compressed vector in data fields of the memory of the determined field width along with a magnitude and sign of the first data point of the data vector.
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Bio-logic Systems Corp.
Williams Howard L.
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