ASIC - Based Acoustic Echo - Canceller Board ' for
نویسندگان
چکیده
This paper deals with the design and realization of an echo-canceller board for a VME bus. The work has been carried out by integrating the abilities and the competences of some academic and industriai research groups within the framework of Subproject 3.1 of the ltalian National Research Council «TelecommuniCation Project». The board implements an efficient algorithm for the cancellation of acoustic echoes and is to be used in a video-conference terminaI. lt employes application specitic integrated circuits (ASIC), in order to obtaiTI a compact realization ofthe system, as required in present inter-personal terminal systems. The board consists of a DSP processor which computes the algorithm, a high-performance interface with the analog world, and a finite impulse response filter (FIR) which emulates the response of the acoustic channeI. The design and the performance of the integrated circuits for the AID and DIA conversion and the FIR filter are reported.
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