| 摘要 |
PURPOSE:To obtain an echo canceller with simple construction without deterioration in a characteristic by inputting an inputted reception signal string to each Rin input of n-set of echo cancellers and using it as a reception output signal. CONSTITUTION:An inputted transmission signal Y is divided into signal strings Y1, Y2 by a branch circuit 50. That is, the branch circuit 50 divides the sent signal string into two signal strings at an interval of 2-sample and each signal is inputted to an Sin of two echo cancellers 30, 30', Since the echo cancellers have a double processing time more than that before the branching, it is possible to use a low band echo cenceller. A multiplex circuit 60 constitutes a transmission output signal E by Sout signals E1, E2 of each echo canceller. The order of the multiplex of the signals E1, E2 in the same order as that before the branching and in forming the hardware for the branch circuit and the multiplex circuit, the period signal to each echo cenceller is separated by applying wired OR to the Sout output.
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