France Telecom

Orange

Monique Auvray

Jean-Philippe Thomas

David Deleam

Grégoire Le Tourneur

The invention relates to processing signal for improving a sound pick-up in telephone and/or videophone units. The inventive method consists in comparing () a signal transmitted by a unit microphone (Mic) with a threshold low value (THR_LOW) and in amplifying () said microphone-transmitted signal when it is less than the threshold low value. However, said steps depend on the test () carried out on a signal used for feeding the loud speaker (HP), in particular consisting in controlling said last signal (crete_HP) of a background noise order (BDF) in such a way that the background noise is not amplified by an acoustical coupling between the microphone (Mic) and the loud speaker (HP).

Sound pick-up method and device, in particular for handsfree telephone terminals

An echo processing technique for attenuating echo components of a direct signal Xin a return signal Y. A receive gain Grand a send gain Geare calculated. The receive gain Gris applied to the direct signal and an input signal Xis produced and emitted into an echo generator system. The send gain Geis applied to an output signal Yfrom the echo generator system and the return signal Yis produced. A coupling variable COR is calculated which is characteristic of the acoustic coupling between the direct signal Xor the input signal Xand the output signal Y. The receive gain Grand the send gain Geare calculated on the basis of the coupling variable.

Growing community of inventors

Lannion, France

Monique Auvray