INVESTIGATION OF FACTORS AFFECTING THE QUALITY OF VOCODER SPEECH
Abstract
Research into and the development of instrumentation for the investigation of factors affecting the quality of vocoded speech are documented. The work reported was specifically concerned with developing a better understanding of the role of the vocal source in the production of both synthetic speech and of natural speech. The design of and operating instructions for the VOTIF vocal track inverse filter - built as part of the program - are presented. A theoretical determination of the interaction between the vocal source and vocoder channel filters has been made and the effect of spectrum flattening on the peak factor and power of a vocoder channel have been computed. Lastly, the pulsed excitation of resonances is discussed. A form of pitch jitter which could either maximize vocal output or minimize vocal tract impedance effects is reported on.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1969
- Accession Number
- AD0690179
Entities
People
- Thomas H. Crystal