Method and apparatus for decoding an audio signal

摘要

An apparatus for processing a signal and method thereof are disclosed. Data coding and entropy coding are performed with interconnection, and grouping is used to enhance coding efficiency. The present invention includes the steps of obtaining difference information and entropy- decoding the difference information according to an entropy coding scheme including time grouping and frequency grouping and data-decoding the difference information according to a data decoding scheme including a pilot difference, a time difference and a frequency difference.