Patent ID: 7646319

Claim:
A method for processing a signal, the method comprising: determining, by an audio coding apparatus, an entropy table identifier associated with a particular data coding scheme used to encode a signal; obtaining a pilot reference value and one or more pilot difference values from the signal; selecting, from among several entropy tables, a particular entropy table for use with the pilot reference value or the pilot difference values, based on the entropy table identifier; and entropy-decoding the pilot reference value or the pilot difference values using the selected entropy table, wherein: the pilot reference value is dependent on each data element of a current group included in a current frame, and is not dependent on the data elements of an other frame, a quantity of the pilot difference values is equal to a quantity of the data elements of the current group, the pilot reference value is a single value which applies to all of the data elements of the current group, and each pilot difference value corresponds to each data element of the current group.