Publication
A simple lossy audio coding scheme based on the DWT
| Summary: | 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. |
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| Main Authors: | Gupta, Vikas Kumar |
| Other Authors: | Khevariya, Prashant Kumar; Salvado, José |
| Subject: | Audio coding Lossy coding schemes Wavelet transform |
| Year: | 2007 |
| Country: | Portugal |
| Document type: | conference output |
| Access type: | open access |
| Associated institution: | Universidade Politécnica de Castelo Branco |
| Language: | English |
| Origin: | Repositório Científico da Universidade Politécnica de Castelo Branco |
| Summary: | 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. |
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