| CPC G10L 21/0232 (2013.01) [G10L 25/18 (2013.01); G10L 25/21 (2013.01); G10L 2021/02082 (2013.01)] | 11 Claims |
|
1. An echo suppression device configured to be provided in a transmitting signal path that transmits an input signal input from a microphone, in a near-end terminal including a speaker and the microphone, the echo suppression device, comprising
a mask generation unit that
generates a base mask based on a learning signal transmitted through the transmitting signal path when a speech is not input to the microphone and a sound is output from the speaker, and
generates a plurality of masks by changing a magnitude of the learning signal, the plurality of masks including the base mask;
a mask storage unit that stores the plurality of masks;
a mask selection unit that sequentially selects an optimal mask from among the plurality of masks, the optimal mask selected for each sample point in time that a reception signal is acquired, the reception signal transmitted through a receiving signal path that transmits a signal to the speaker, the optimal mask selected according to;
a magnitude of a reception signal and
the base mask generated for the reception signal acquired within a predetermined period before the sample point in time;
a double-talk detection unit that sequentially detects whether a speech is input to the microphone at the sample point in time that the reception signal is acquired based on a result of comparing the input signal with the optimal mask selected for the sample point in time; and
an echo suppressor that sequentially performs a process of suppressing an echo on the input signal in response to the double-talk detection unit detecting that a speech is not input to the microphone and the reception signal includes a speech.
|