Speech analyzer for analyzing pitch or frequency perturbations in individual speech pattern to determine the emotional state of the person
US4093821A · kind A · utility
Inventor
Key dates
| Filing date | Jun 14, 1977 |
| Grant date | Jun 6, 1978 |
| Priority date | — |
| Expiry date | Jun 14, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L25/90
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A speech analyzer is provided for determining the emotional state of a person by analyzing pitch or frequency perturbations in the speech pattern. The analzyer determines null points or "flat" spots in an FM demodulated speech signal and produces a first output indicative of the nulls and a second output indicative of the presence of a "word." A pitch frequency processor receives the FM demodulated speech signal and the first output of the detector means and produces an output having an amplitude proportional to the frequency of the speech signal at the null. A pitch null duration processor receives the first output of the detector means and produces an output having an amplitude proportional to the duration of the nulls. A ratio processor receives the first and second outputs of the detector means and produces an output proportional to the ratio of the total duration of all the nulls within a word to the total duration of the word. The outputs of the pitch frequency processor, pitch null duration processor and ratio processor can be used to provide an indication of the emotional state of the individual whose speech is being analyzed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.