Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
CONFERENCE TELEPHONE SYSTEM
Document Type and Number:
Japanese Patent JPS63146546
Kind Code:
A
Abstract:

PURPOSE: To attain a conference telephone system easily identifying a caller with low cost by detecting an output of a microphone corresponding to a caller and driving/displaying an utterance display device exclusive for each talker.

CONSTITUTION: When a participant A makes an utterance on a microphone 11, it is distributed to transmission lines 52, 62 via a transmission line 31, and an utterance signal of the participant A applied to an utterance detection amplifier 8 from the transmission line 62 blinks a lamp 1 and is supplied to a participant C by a speaker 2. This is similar as to other participants. Since the caller is easily identified and the system is constituted without using a picture equipment and a transmission line, the cost is reduced and an economical conference telephone system with rich in feeling of presence is realized.


Inventors:
TAKASAKI YOSHITAKA
IMOTO KATSUYUKI
TAKASE MASAHIKO
Application Number:
JP1986000292311
Publication Date:
June 18, 1988
Filing Date:
December 10, 1986
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
HITACHI LTD
International Classes:
H04M3/56; (IPC1-7): H04M3/56