| 摘要 |
<p>It is an object of the present invention to provide an echo suppressor which is simple in construction in comparison with the conventional echo suppressor, and which can suppress echoes corresponding to the spatial transfer paths, and reduce the amount of calculations necessary to suppress echoes. The echo suppressor is operative under the condition that transfer functions corresponding to spatial transfer paths between two or more loudspeakers ( 105, 106 ) and one or more microphones ( 107, 108 ) are estimated on the basis of symmetrical arrangement of the loudspeakers (105, 106) and the microphones ( 107 , 108 ). The echo suppressor includes: a target signal generating unit (111) operable to generate target signals to be used to suppress echoes which are in signals indicating sounds received by the microphones ( 107, 108 ) from the loudspeakers ( 105, 106); a reference signal generating unit ( 112 ) operable to generate reference signals corresponding to the target signals on the basis of signals indicating sounds to be outputted from the loudspeakers ( 105 , 106 ); and an echo suppressing unit ( 113 ) operable to suppress, on the basis of the target signals and the reference signals, echoes which are in signals indicating sounds received by the microphones (107, 108).</p> |
