Audio encoder for encoding an audio signal, method for encoding an audio signal and computer program under consideration of a detected peak spectral region in an upper frequency band

Audio encoder for encoding an audio signal comprising a lower frequency band and an upper frequency band, comprising:

• a detector for detecting a significant signal component in the lower frequency band and a peak spectral region in the upper frequency band of the audio signal;
• a shaper for shaping the lower frequency band using shaping information for the lower frequency band and for shaping the upper frequency band using at least a portion of the shaping information for the lower frequency band, wherein the shaper is configured to additionally attenuate spectral values in the detected peak spectral region in the upper frequency band, when the significant signal component in the lower frequency band has been detected;
• and
• a quantizer and coder stage for quantizing a shaped lower frequency band and a shaped upper frequency band and for entropy coding quantized spectral values from the shaped lower frequency band and the shaped upper frequency band.