Third European Conference on Speech Communication and Technology

Berlin, Germany
September 22-25, 1993


A Pitch Synchronized Synthesizer for the IMBE Vocoder

W. Ma, A. M. Kondoz, B. G. Evans

Center for Satellite Engineering Research, University of Surrey, Guildford, Surrey, UK

Sinusoidal coding and Multi-Band Excitation (MBE) vocoders are very promising coding schemes, but require large computational complexity for generating the large number of sinusoids. This paper presents a synthesizer based on pitch period interpolation. As a result, it significantly reduces the computational requirement, in real time implementation. The computational load for a typical IMBE vocoder is reduced from 30% to 12% of the available DSP32C capacity. Since the pitch synchronized method mimics natural speech production, it produces better quality than the conventional sample by sample interpolation method.

Keywords: Speech Coding, Speech Synthesizing

Full Paper

Bibliographic reference.  Ma, W. / Kondoz, A. M. / Evans, B. G. (1993): "A pitch synchronized synthesizer for the IMBE vocoder", In EUROSPEECH'93, 527-530.