Title:
【発明の名称】遠隔ステーシヨン間の通信法及び通信用会議システム
Document Type and Number:
Japanese Patent JP2604575
Kind Code:
B2
Abstract:
An audio conferencing system includes a plurality of remote stations (10) which are interconnected in a conference mode through a central switching network (66) through communication lines (16). Each of the remote stations has a microphone (34) and a speaker (64) associated therewith. The microphone (34) on each of the remote stations has a voltage controlled amplifier (VCA) (59) associated therewith and the speaker (64) has a VCA (60) associated therewith. A CPU (48) selectively controls the output of the microphone (34) to selectively decrease the gain thereof when voice is not detected. When voice is detected above a predetermined threshold, the microphone (34) is allowed to operate at full gain and the speaker (64) has the output level thereof decreased. This effectively reduces the audio loop gain between remote stations in a conference.
Inventors:
Elia Tutt, Neil, Tamkins
Jack, Nail, Bartlemay
Jack, Nail, Bartlemay
Application Number:
JP7686186A
Publication Date:
April 30, 1997
Filing Date:
April 04, 1986
Export Citation:
Assignee:
Dita Point, Co-Palaisyan
International Classes:
H04N11/00; H04M3/56; H04M11/00; H04N7/14; H04N7/15; H04N11/24; (IPC1-7): H04M3/56; H04M11/00; H04N7/14
Domestic Patent References:
| JP56157164A |
Attorney, Agent or Firm:
Nobuhiko Nakajima (2 outside)