Method and apparatus for signal processing that uses the transform domain log companding

摘要

And due to the fact that by applying the log companding for time-domain representation or spectral domain representation of the audio signal, and provides an encoded audio signal, a method and apparatus for audio signal processing. Encoded audio signal is decoded upon receipt. By separating the audio signal into a specific frequency band, each having a coefficient, time domain representation or frequency domain representation of the audio signal is calculated. Log companding with different compression ratios can be performed for each coefficient, the encoded signal is provided. Upon receipt of a signal encoded, the inverse log companding, and reconstruction of the time-frequency or time-scale is performed, the audio signal is provided.