AES E-Library

Validity of Bit Compressed Digital Voice Recordings for Spectrographic Analyses: Input for a Database, a Preliminary Test

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 Import into BibTeX
Subject:Audio Forensics in the Digital Age

Click to purchase paper or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $20 for non-members, $5 for AES members and is free for E-Library subscribers.

Learn more about the AES E-Library

E-Library Location: (CD 26thPapers)   /26/aes26-000028.pdf

Start a discussion about this paper!