Audio coding system using characteristics of a decoded signal to adapt synthesized spectral components

A medium that is readable by a device and that conveys a program of instructions executable by the device to perform a method for processing encoded audio information, wherein the method comprises steps performing the acts of:

• receiving the encoded audio information and obtaining therefrom subband signals representing some but not all spectral content of an audio signal;
• examining the subband signals to obtain a characteristic of the audio signal;
• generating synthesized spectral components that have the characteristic of the audio signal;
• integrating the synthesized spectral components with the subband signals to generate a set of modified subband signals;
• and
• generating the audio information by applying a synthesis filterbank to the set of modified subband signals.

An apparatus for processing encoded audio information, wherein the apparatus comprises:

• an input terminal that receives the encoded audio information;
• memory;
• and
• processing circuitry coupled to the input terminal and the memory;
• wherein the processing circuitry is adapted to:
• receive the encoded audio information and obtain therefrom subband signals representing some but not all spectral content of an audio signal;
• examine the subband signals to obtain a characteristic of the audio signal;
• generate synthesized spectral components that have the characteristic of the audio signal;
• integrate the synthesized spectral components with the subband signals to generate a set of modified subband signals;
• and
• generate the audio information by applying a synthesis filterbank to the set of modified subband signals.