Telephone apparatus and a communication method using such apparatus
US7212841B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 2002 |
| Grant date | May 1, 2007 |
| Priority date | — |
| Expiry date | May 13, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M9/08
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In accordance with a first aspect of the present invention there is provided a telephone apparatus including a transmitter portion and a receiver portion, an input transducer for converting input audio signals into electrical signals, a connectable input link between the input transducer and the transmitter portion to deliver when connected an input electrical signal to the transmitter portion to be transmitted by the transmitter portion, an output transducer for converting an output electrical signal into an audio signal and a connectable output link between the receiver portion and the output transducer for delivering when connected an output signal to the output transducer, optionally an echo cancellation circuitry portion adapted to sample the output signal and produce an echo replica signal, optionally a mixer included in the input link for mixing an echo replica signal produced by the echo cancellation circuit with an input signal produced by the input transducer, and an echo suppression circuitry portion including detector means for producing a first magnitude signal which represents a magnitude property of a first sample of an output signal So in the output link and a secon…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.