Speech signal transmitting and receiving apparatus with noise sensitive volume control
US5732390A · kind A · utility
Inventors
Key dates
| Filing date | Aug 12, 1996 |
| Grant date | Mar 24, 1998 |
| Priority date | — |
| Expiry date | Aug 12, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L21/0232
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A speech signal transmitting receiving apparatus, such as a portable telephone set, includes a speech signal transmitting encoding circuit, a noise domain detection unit, a noise level detection unit and a controller. The speech signal transmitting encoding circuit compresses input speech signals by digital signal processing at a high efficiency. The noise domain detection unit detects the noise domain using an analytic pattern produced by the speech signal transmitting encoding circuit. The noise level detection unit detects the noise level of the noise domain detected by the noise domain detection unit. The controller controls the received sound volume responsive to the noise level detected by the noise level detection unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.