| 摘要 |
PROBLEM TO BE SOLVED: To provide high quality voice call service by preventing malfunction of an echo canceller device that operates depending on a result of determining whether an input voice signal is a single talk (ST) voice signal or a double talk (DT) voice signal.SOLUTION: An echo canceller control device 300 comprises: a measurement unit 301 for measuring the magnitude of an input measurement signal input, as a second voice signal, to an echo canceller device 310 that determines whether a first voice signal input as a signal transmitted from a communication terminal device 31 to a communication terminal device 32 is a DT voice signal or a ST voice signal on the basis of a determination criterion 311 and performs processing of removing an echo voice signal from the first voice signal depending on a result of the determination, and the magnitude of a generated echo input measurement signal caused by the input measurement signal; and correction means for correcting the determination criterion 311 on the basis of a result of the measurement by the measurement unit 301.SELECTED DRAWING: Figure 4 |
