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

摘要

An audio encoder for encoding an audio signal having a lower frequency band and an upper frequency band, comprising: a detector for detecting a peak spectrum region of an upper frequency band of the audio signal; a shaper (804) for shaping the lower frequency band using shaping information for the lower band and for shaping the upper frequency band using at least a portion of the shaping information for the lower band; a quantizer and coder stage (806) for quantizing the shaped lower frequency band and the shaped upper frequency band and entropy coding the quantized spectral values from the shaped lower frequency band and the shaped upper frequency band; (804) is an audio encoder, configured to further attenuate a spectral value of the detected peak spectral region in the upper frequency band.