Patent ID: 7885819
Filing Date: 2011-02-08
Classification: G10L

Abstract:
1. A method of decoding a compressed audio bitstream containing syntax elements conforming to a bitstream syntax, the bitstream syntax defining a base coding layer and a base plus coding layer for coding a base band spectrum region of audio content, the method comprising: reading the base plus coding layer of the compressed audio bitstream; parsing a first syntax element from the base plus coding layer specifying a coding mode of the base plus coding layer from among at least an exclusive mode and an overlay mode; in case of the exclusive mode, processing coded audio content of the base plus coding layer alone to reconstruct the base band spectrum region portion of an output audio signal; in case of the overlay mode, processing coded audio content of the base coding layer and the base plus coding layer to reconstruct the base band spectrum region portion of an output audio signal, wherein the coded audio content of the base plus coding layer is combined to fill spectral holes in the coded audio content of the base coding layer; and playing the output audio signal.