DATA ENCODING AND DECODING

摘要

A method decoding a data values set includes: decoding a first portion of each data value from one or more data sets; decoding a second portion depending on integer bits of data values not fully encoded by the data sets, and, if a data value has not been fully decoded by first and second portions, decoding a remaining third portion of the data value; detecting, for a subset of the data values, (i) instances of data values for which a third portion has been encoded and would still have been required had a higher value of n been used, and (ii) instances of data values for which a second portion has been encoded but the value of n was such that the data value could have been fully encoded by first and second portions using a lower value of n; and varying n for use in subsequent data values.

主权项

1. A data decoding method for decoding a set of data values, the method comprising the steps of:
decoding a first portion of each data value from one or more data sets indicative of first portions of predetermined magnitude ranges and encoded to an input data stream using binary encoding; decoding a second portion of at least those data values not fully encoded by the data sets, the number of bits of the second portion depending upon a value n, where n is an integer, data defining the second portion being included in the input data stream and, if a data value has not been fully decoded by the respective first and second portions, decoding a remaining third portion of the data value from the input data stream; detecting, for a subset of the data values, (i) instances of data values for which a third portion has been encoded and would still have been required had a higher value of n been used, and (ii) instances of data values for which a second portion has been encoded but the value of n was such that the data value could have been fully encoded by first and second portions using a lower value of n; and varying n for use in respect of subsequent data values according to the results of the detecting step.