AUDIO CODING SYSTEM USING CHARACTERISTICS OF A DECODED SIGNAL TO ADAPT SYNTHESIZED SPECTRAL COMPONENTS

摘要

A receiver in an audio coding system receives a
signal conveying frequency subband signals representing an
audio signal. The subband signals are examined to assess
one or more characteristics of the audio signal. Spectral
components are synthesized having the assessed

characteristics. The synthesized spectral components are
integrated with the subband signals and passed through a
synthesis filterbank to generate an output signal. In one
implementation, the assessed characteristic is temporal
shape and noise-like spectral components are synthesized
having the temporal shape of the audio signal.