| 摘要 |
PROBLEM TO BE SOLVED: To attain proper audio delay control in matching with a display image by preventing intermission of an audio signal on its way to eliminate a sense of incongruity in an interactive state between a transmitter side and a receiver side. SOLUTION: A silence state detection section 4 of an audio delay controller 1 detects a silence state or a small sound volume state of a transmission audio signal, a silence state detection section 5 detects a silence state or a small sound volume state of a reception audio signal. An interactive state detection section 7 detects both interactive states between a transmitter side and a receiver side based on the silence state detection signals from the silence state detection sections 4, 5. An image motion detection section 6 detects whether or not an image of a transmission image signal is in a still state. A delay control timing control section 3 generates a delay on/off control signal with respect to a voice signal based on output signals from the silence state detection section 4, the image motion detection section 6 and the interactive state detection section 7 to control the operation of a voice delay circuit 2. |
