A Band Extension Technique for G.711 Speech Using Steganography

Naofumi AOKI  

IEICE TRANSACTIONS on Communications   Vol.E89-B   No.6   pp.1896-1898
Publication Date: 2006/06/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.6.1896
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Network
speech enhancement,  band extension,  narrow-band speech,  wide-band speech,  steganography,  

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This study investigates a band extension technique for speech data encoded with G.711, the most common codec for digital speech communications system such as VoIP. The proposed technique employs steganography for the transmission of the side information required for the band extension. Due to the steganography, the proposed technique is able to enhance the speech quality without an increase of the amount of data transmission. From the results of a subjective experiment, it is indicated that the proposed technique may potentially be useful for improving the speech quality, compared with the conventional technique.