APPARATUS AND METHOD FOR PROCESSING AN ENCODED AUDIO SIGNAL

The invention refers to an apparatus for processing an encoded audio signal (100). The audio signal (100) comprises a sequence of access units (100'), each access unit comprising a core signal (101) with a first spectral width and parameters describing a spectrum above the first spectral width. The apparatus comprises: a demultiplexer (1) for generating, from an access unit (100') of the encoded audio signal (100), said core signal (101) and a set of said parameters (102), an upsampler (2) for upsampling said core signal (101) of said access unit (100') and outputting a first upsampled spectrum (103) and a timely consecutive second upsampled spectrum (103'), the first upsampled spectrum (103) and the second upsampled spectrum (103'), both, having a same content as the core signal (101) and having a second spectral width being greater than the first spectral width of the core spectrum (101), a parameter converter (3) for converting parameters of said set of parameters (102) of said access unit (100') to obtain converted parameters (104, 104'), and a spectral gap filling processor (4) for processing said first upsampled spectrum (103) and said second upsampled spectrum (103') using said converted parameters (104). The invention also refers to a corresponding method.