Patent ID: 7672379

Claim:
A method for processing a signal using pilot based coding (PBC), the method comprising: receiving, by an audio coding apparatus, a first audio signal including a payload part and a header part that has main configuration information of the payload part; extracting at least one of data coding information and entropy coding information from the payload part, wherein the payload part has at least one frame comprising: a first data part having at least one of the data coding information and the entropy coding information per a group, the data coding information indicating a data coding scheme, the data coding scheme including a pilot coding scheme; and a frame information part having sub-configuration information for the first data part; and generating a second audio signal using the extracted information, wherein: the pilot coding scheme is used to encode or decode data elements of a current group included in a current frame using a pilot reference value and one or more pilot difference values generated using the data elements and the pilot reference value, the pilot reference value is dependent on each of the data elements of the current group, 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.