| 摘要 |
PROBLEM TO BE SOLVED: To recognize which opposite party is talking among plural call opposite parties by obtaining the physical position of a partial video whose change quantity with a previous frame partial picture in respective video information is the largest on a video display part. SOLUTION: A reception part 72 separately receives video information of plural terminals and receives mixed sound information obtained by mixing sound information of the plural terminals. Sound output means 41 and 42 are arranged near video display means 21 and 22 corresponding to the plural terminals. Position information detection means 142, 143 and 144 obtain change quantity with the previous partial pictures in video information, obtain the physical positions of the partial video whose change quantity is the largest on the video display parts 21 and 22 and execute counting. A sound volume control means 612 sound volume-controls the decoding signals of mixed sound information based on output from the position information detection means so that sound from the sound output means 41 and 42 correspond to the videos from the corresponding video display means and transmits the signals to the sound output means 41 and 42. |
