Audio signal coding for data compression factor

摘要

The process involves using filter banks, buffers, predictors and coders and starts by dividing the audio signal into partial filter bands, using the MPEG audio process with or without a time-frequency transformation. The partial bands are examined for noise content by a predictor and the bands containing noise are characterised by their mean value only, not by their time functions. Pref the tonal partial bands without noise are coded in the time and frequency range by discrete and quantised values. Each partial band is typically supplied to an individual predictor, and a certain number of scanning values are grouped.