A simple lossy audio coding scheme based on the DWT

Gupta, Vikas Kumar; Khevariya, Prashant Kumar; Salvado, José

http://hdl.handle.net/10400.11/103

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Authors

Gupta, Vikas Kumar

Khevariya, Prashant Kumar

Salvado, José

Abstract(s)

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.

Keywords

Audio coding Lossy coding schemes Wavelet transform

URI

http://hdl.handle.net/10400.11/103

Citation

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