SPECTRA OF VOCODER CHANNEL SIGNALS
Abstract
A channel vocoder derives the short time magnitude spectrum of speech by passing the speech through a set of analyzing channels, each consisting of a band pass filter followed by an envelope detector and a low pass filter. Each channel produces a slowly varying output signal which represents a short term average of the speech energy in the corresponding frequency band. The measurement of the power spectra of these signals is described herein. It appears that these signals may be thought of as band limited to 25 cps.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 04, 1964
- Accession Number
- AD0600185
Entities
People
- C. M. Rader
Organizations
- Massachusetts Institute of Technology