Efficient high-frequency bandwidth extension of music and speech

E. Larsen, R.M. Aarts, M. Danessis

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Abstract

The use of perceptually based (lossy) audio codecs, like MPEG 1 - layer 3 (`mp3'), has become very popular in the last few years. However, at very high compression rates the perceptual quality of the signal is degraded, which is mainly exhibited as a loss of high frequencies. We propose an efficient algorithm for extending the bandwidth of an audio signal, with the goal to create a more natural sound. This is done by adding an extra octave at the high frequency part of the spectrum . The algorithm uses a non-linearity to generate the extended octave, and can be applied to music as well as speech . This also enables application to fixed or mobile communication systems .
Original languageEnglish
Title of host publicationProceedings of the 112th AES Convention, May 10-13, 2002, Munich, Germany
Place of PublicationNew York
PublisherAES
Pages5627-1-6
Publication statusPublished - 2008

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