A control unit for controlling operation of a plurality of audio teleconference terminals comprises a plurality of inputs which are connected each to a particular terminal. A speech detector detects from which terminals speech signals are received and actuates switching means to connect those terminals in open loop teleconference.
申请公布号
US4456789(A)
申请公布日期
1984.06.26
申请号
US19790017280
申请日期
1979.03.05
申请人
THE POST OFFICE
发明人
GROVES, IAN S.;GUARD, DAVID R.;BUNTING, JOHN G.;ROWLANDS, CHRISTOPHER E.;POWTER, EDWIN J.;HOLMES, DAVID W. J.;TROTT, GRAHAM J.
