Spectral Fluctuation Analysis for Audio Compression Using Adaptive Wavelet Decomposition

This paper discusses the design and implementation of a spectral fluctuation analysis based lossy audio coding scheme. We present a simple lossy audio codec, composed of an adaptive wavelet decomposition filter, a modified psycho-acoustic model, an intra-channel de-correlation block followed by quantization and coding block. The intra-channel de-correlation block does the spectral fluctuation analysis to find the successive frames found to be similar and de-correlates it and codes. A Modified psychoacoustic model with simplified masking model was designed to fit this system. The evaluation of the system was clone by using European Broadcasting Union Sound Quality Assessment Material (EBU-SQAM) stereo wave files. Experimental results show the compression ratios achieved and subjective quality evaluation report.