Title:
APPARATUS FOR TELEVISION CONFERENCE CALLING SYSTEM, TELEVISION CONFERENCE BRIDGE AND METHOD OF EXECUTING TELEVISION CONFERENCE
Document Type and Number:
Japanese Patent JPH04234285
Kind Code:
A
Abstract:
PURPOSE: To sharply the reduce transmission band width and the cost by reducing the number of channels for transmitting pictures at the time of a video conference among plural conference rooms. CONSTITUTION: The system has plural video conference rooms 217 and a center video conference bridge. In each conference room 217, a sound signal to which a control signal is superposed is received by a fixed means 219. The control signal normally indicates that one conference room is a management side and all other conference rooms are passive sides and a video on the management side conference room is transmitted to all other conference rooms through a fixed means 211. Although the management side conference room is frequently changed in a video conference, the management side conference is usually set up on one conference room.
Inventors:
JIEI DABURIYU DANURUFU
DEI RIIDO
DEI RIIDO
Application Number:
JP23376291A
Publication Date:
August 21, 1992
Filing Date:
August 22, 1991
Export Citation:
Assignee:
AMERICAN TELEPHONE & TELEGRAPH
International Classes:
H04M3/56; H04M9/00; H04N7/15; (IPC1-7): H04M3/56; H04M9/00; H04N7/15
Domestic Patent References:
| JPH01128685A | 1989-05-22 | |||
| JPH01188188A | 1989-07-27 |
Attorney, Agent or Firm:
Hirofumi Mimata