In the spectrographic analysis of voice exemplars, there is a question of the impact of commercially available compression schemes on the visual representation of the voice. Specifically, there is a question whether or not the codec reconstruction of the time-domain waveform might alter features of the wide-band spectrogram, including formant shape and position. This paper contributes a collection of comparative analyses of English speech exemplars that are recorded simultaneously via both linear and compression-based recording methods. G.723-encoded recordings (max 6.3kbps, used in IC-recorders and surveillance recording equipment) and the Sony Memory stick format using MSV LPEC-SP compression are evaluated.

Authors: Begault, Durand R.; Brixen, Eddy B.
Affiliations: Charles M. Salter Associates; Poza Consulting Services(See document for exact affiliation information.)
AES Conference: 26th International Conference: Audio Forensics in the Digital Age (July 2005)
Paper Number: 3-1
Publication Date: July 1, 2005 Import into BibTeX
Subject: Audio Forensics in the Digital Age
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=13255

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