Rate Audio Coding Research Articles

Multi Rate Audio Coding Based On Combining Wavelet with DCT Transform

Multi Rate Audio Coding Based On Combining Wavelet with DCT Transform

Perceptual filter design for audio coding using psychoacoustic modelling

A generalised perceptual filter which aims to reduce the audible quantisation noise in low bit rate audio coding has been developed. The filter derivation is based on a psychoacoustic excitation pattern model. Experimental results show that the perceptual filter can reduce the audible quantisation noise in a sub-band coded audio signal.

On the compression obtainable with four-tap wavelets

The performance obtainable with four-tap wavelet filters for low bit rate audio coding is presented. For the investigation and comparison of the performance of these wavelet filters, a codec model has been designed and implemented based on wavelet packet algorithm and the model of auditory perception.