| 摘要 |
PURPOSE:To realize the conference communication for a few participants and lots of participants by changing over the system into an optimum adding system automatically in response to the number of participants of conference and connecting route. CONSTITUTION:In starting the conference communication, the information of the like of conference participants transmitted to a time division exchange from a subscriber is transmitted to a conference communication control circuit 5 via a control information line 7 and a control information receiving circuit 8. The conference communication control circuit calculates the number of conference participants by this information and sets the selected speakers according to the specified algorithm. A sound volume detecting circuit 4 detects the communication sound volume according to the subscriber by an input highway 1 and informs it to a conference communication control circuit 5. The control circuit 5 selects the number of subscribers set by a prescribed algorithm by the larger sound volume, transmits its information to a sound synthesis control circuit 6, the sound for an optimum number of participants is mixed by a sound synthesis circuit 3 and the result is shared to each participant from the output highway 2. |
