Method and apparatus for identifying speech in telephone signals
US4979214A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 1989 |
| Grant date | Dec 18, 1990 |
| Priority date | — |
| Expiry date | May 15, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q1/46
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Method and apparatus for identifying telephone signals which are produced by a human voice. The method includes determining a measure of the energy of predetermined frequency bins of the frequency spectrum of the signal for a frame comprised of a predetermined number of consecutive samples of the signal, if the signal is an analog signal; averaging the measure of the energy of the predetermined frequency bins over a predetermined number of frames to provide a frame group average energy measure; determining the sum of the absolute value of the difference between the frame group average energy measure for all pairs of frame groups which are consecutive in time; and comparing the sum with a predetermined amount to identify the signal as having been produced by a human voice if the sum exceeds the predetermined amount.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.