| 摘要 |
PROBLEM TO BE SOLVED: To provide a signal processing system without the necessity of prestoring multiple programs.SOLUTION: A CPU 12 reads a predetermined sound signal processing program from a nonvolatile memory 14 and transmits the program to respective microphone units via a communication I/F 11. A sound signal processing program to be transmitted from a host device 1 is temporarily stored in a nonvolatile memory 23A via a communication I/F 21A. A sound signal processing unit 24A performs processing corresponding to the sound signal processing program temporarily stored in the volatile memory 23A and transmits a digital sound signal related to sound collected by a microphone 25A to the host device 1. When the program of an echo canceller is transmitted from the host device 1, for example, an echo component is removed from sound collected by the microphone 25A and then, the signal is transmitted to the host device 1. The sound signal processing program temporarily stored in the volatile memory 23A is deleted after blocking power supply to a microphone unit 2A. Each one of the microphone units surely performs an operation after receiving a sound signal processing program for operations from the host device 1 whenever the unit is started. |
