GUPTA,Vikas K; KEVARIYA, Prashant K; SALVADO, José - A simple lossy audio coding scheme based on the DWT In Proceedings Engenharias’2007. Covilhã: UBI, 2007
978-989-654-000-5
Title
A simple lossy audio coding scheme based on the DWT
This paper proposes a simple scheme for audio
coding that does not use perceptual models. The audio coder
is based on the discrete wavelet transform to decorrelate
signals, computed through the lifting scheme, and followed by
Huffman coding. The evaluation of the coding scheme is
presented by using some .wav audio test files, coded for
different conditions, and also includes subjective evaluation.
Experimental results show the compression ratios achieved,
the degradation of the signals expressed as values of signal to
noise ratio and the changes in spectrum information.
