14th International Congress of Phonetic Sciences (ICPhS-14)

San Francisco, CA, USA
August 1-7, 1999

Synchronous Recording of EPG and Speech Signals using a Computer's Sound Interface

Michel Scheffers, Werner Thon

Institute of Phonetics and Digital Speech Processing, University of Kiel, Germany

Electro-palatograph systems that allow time-synchronous capture of the EPG data and the corresponding speech signal, typically require a special interface card for the connection to a computer. This makes them dependent on the type of computer and its operating system.
   Most computers used in speech research are nowadays equipped with high-quality 16-bit stereo analogue I/O. We therefore explored encoding the digital EPG data in an analogue signal within the bandwidth and the dynamic range required for a high-quality speech recording. This analogue EPG signal may then be recorded on any PC, MAC or workstation having such a sound interface. Recording it in stereo with the speech signal ensures perfect time-synchronization. System-dependency is thus reduced to the decoding and display software.
   We illustrate the coding and decoding principles by describing an experimental hardware implementation of the coder and the decoding software.

Full Paper

Bibliographic reference.  Scheffers, Michel / Thon, Werner (1999): "Synchronous recording of EPG and speech signals using a computer's sound interface", In ICPhS-14, 2255-2258.