ANALYSIS OF DIGITAL AND ANALOG FORMANT SYNTHESIZERS.
Abstract
A digital formant is a resonant network based on the dynamics of second-order linear difference equations. A serial chain of digital formants can approximate the vocal tract during vowel production. The digital formant is defined and its properties are discussed, using z-transform notation. The results of detailed frequency response computations of both digital and conventional 'analog' formant synthesizers are then presented. These results indicate that the digital system without higher pole correction is a closer approximation than the analog system with higher pole correction. A set of measurements on the signal and noise properties of the digital system is described. Synthetic vowels generated for different signal-to-noise ratios help specify the required register lengths for the digital realization. A comparison between theory and experiment is presented. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 28, 1968
- Accession Number
- AD0674421
Entities
People
- Bernard Gold
- Lawrence R. Rabiner
Organizations
- Massachusetts Institute of Technology