| 摘要 |
PURPOSE:To effectively carry on a TV conference by specifying a speaker based on the phase difference of output between two microphones at the transmitter side and the pointing the speaker by an arrow on a screen at the receiver side. CONSTITUTION:A phase difference is calculated between the output of microphones 100 and 101 placed at the transmitter side. Then an angle is detected to the center line between both microphones and the speech information is calculated on a video screen based on the rate of the detected angle. In other words, the phase difference of transmission lags of both microphones 100 and 101 is detected by a phase difference detecting circuit 200. Then an position of a speaker is calculated on the screen by a arithmetic circuit 300 on the screen, and the position information on the screen is converted based on the phase information 400. Meanwhile the video data sent from a TV camera 500 are processed by a video circuit 600, and the position symbol information on the screen is synthesized with the video information by a video synthesizing circuit. These synthesized information are sent to a video signal device 700 and coded there. At the receiver side, the speaker is pointed by an arrow on a receiving screen. In such a constitution, the speaker is specified with no use of a high speed line and a TV conference is effectively carried on. |
