Method for encoding delta values

Details Method for encoding delta values Method for encoding delta values

1996-08-09

1998-03-03

Gaffin, Jeffrey A.

Coded data generation or conversion

Digital code to digital code converters

To or from differential codes

341 76, 341 77, H03M 300

Patent

active

057240337

ABSTRACT:
In a computer implemented method for encoding digital values that are arranged in a successively increasing order, a delta value is determined for each pair of immediately successive values. The delta values are the differences between the pair of immediately successive values. For each delta value which can be encoded as a single byte, a logical zero is stored in the least significant bit of the single byte, and the delta value is stored in the most significant bits of the single byte. Otherwise, for each delta value which must be encoded as a plurality of bytes, a logical one is stored in the least significant bit of the first byte of the plurality of bytes, and a first portion of the delta value is stored in the most significant bits of the first byte. In this case, a logical zero is stored in the most significant bit of the next byte, and a next portion of the delta value is stored in the least significant bits of the next byte. If the next portion is the last portion of the delta value, a logical zero is stored in the most significant bit of the last byte, and the last portion of the delta value is stored in the least significant bits of the last byte.

REFERENCES:
patent: 4719642 (1988-01-01), Lucas
patent: 5467134 (1995-11-01), Laney et al.

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