Patent ID: 7813380

Claim:
A method for processing a signal using pilot based coding (PBC) in a receiver, the method comprising: receiving, by a manager, a signal including a video stream and an audio stream from an Internet, demultiplexing, by a demultiplexer, the signal into the video stream and the audio stream, the audio stream including audio data; obtaining, by an audio decoder, first frequency grouping information identifying a number of parameter bands within a frame of the audio data, and second frequency grouping information identifying a group of data bands from the number of parameter bands; and decoding the audio data through extracting a pilot reference value and pilot difference values from the identified group of data bands and obtaining data elements of the group of data bands by adding the pilot reference value to the pilot difference values respectively, wherein the pilot reference value is decided with reference to the data elements of the group of data bands, the pilot reference value is a single value which applies to all of the data elements of the group of data bands, the pilot difference values of the group of data bands are generated by subtracting the pilot reference value of the group of data bands from the data elements of the group of data bands respectively, and a number of the pilot difference values of the group of data bands is equal to a number of the data elements of the group of data bands.