A Parametric Audio Coding System Oriented to High Sampling Frequency Audio Signals
Dou Wei-pei · Audio Engineering · 2005
With a brief review of current method used in parametric audio coding, a parametric audio coding system is presented in this paper, which is oriented to high sampling frequency audio signals. The proposed system is composed of a multiresolution sinusoidal model and a multiresolution ERB noise model. As options for the system, harmonic structure analysis, dual-transform transient component detector and dual-transform transient model also make the system perform better for certain kinds of audio signals. With the help of all these models, the proposed parametric audio coding system can achieve an average bitrate of 24 Kb/(s·ch) for audio signals sampled at 44.1 kHz and 48 kHz with a good subjective quality.