Machine answer detection
US5371787A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 1, 1993 |
| Grant date | Dec 6, 1994 |
| Priority date | — |
| Expiry date | Mar 1, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2203/2027
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A detector to indicate if a telephone call was answered by an answering machine or a live person includes (to analyze frames): a click detector; a ring detector; a voice detector; an energy detector; and a controller. The controller routes to: a voice analyzer if voice occurred; a ring analyzer if ring started, continues, or ended; a noise detector if there is neither ring nor voice; a click analyzer if a click occurred; an answer analyzer if ring did not start in the frame; and a silence analyzer. The noise detector detects noise; the ring analyzer detects start time, end time, and length of ring; the click analyzer detects click time; the answer analyzer detects call answer time; the silence analyzer detects silence and the time of predetermined lengths of silence; and the voice analyzer detects the first frame of voice and routes to an on-first voice analyzer or to an after-first voice analyzer. Lastly, the on-first voice analyzer determines if the call was answered by an answering machine and routes to a reporter and the after-first voice analyzer determines if the telephone call was answered by an answering machine or a live person and routes to the reporter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.