| 摘要 |
PROBLEM TO BE SOLVED: To provide an acoustic signal synchronization sound collection system that highly accurately synchronizes acoustic signals on a large number of channels communicating via a network.SOLUTION: In an acoustic signal synchronization sound collection system, acoustic signal synchronization sound collection/reproduction devices, each comprising one main controller and one or more sub controllers, communicate acoustic signals on a plurality of channels via a network in such a way that the acoustic signals are communicated between the main controllers and between the sub controllers. The main controllers supply a TSP signal of an analog signal with a prescribed period as a synchronization signal and the difference between the synchronization signal and a received acoustic signal as delay information to the sub controllers. The sub controllers take out the difference between sub side transmission speech synchronization information extracted by performing circular convolution operation of an inverse TSP signal relative to the synchronization information and a sub side reception speech synchronization signal received from a far end sub controller, and on the basis of the deviation between the difference and the delay information, synchronize the received acoustic signal with the acoustic signal received at the main controller side. |
