SIGNAL PROCESSING SYSTEM AND SIGNAL PROCESSING METHOD

摘要

Provided is a signal processing system in which a plurality of programs are not required to be stored in advance. A CPU 12 reads a predetermined sound signal processing program from a non-volatile memory 14 and transmits the program to each microphone unit via a communication I/F 11. The sound signal processing program transmitted from a host device 1 is temporarily stored in a volatile memory 23A via a communication I/F 21A. A sound signal processing section 24A performs a process corresponding to the temporarily stored sound signal processing program and transmits a digital sound signal relating to the sound picked up by a microphone 25A to the host device 1. For example, in the case that an echo canceller program was transmitted from the host device 1, the echo component in the sound picked up by the microphone 25A is removed and the resultant sound is transmitted to the host device 1. The sound signal processing program temporarily stored in the volatile memory 23A is erased in the case that power supply to a microphone unit 2A is shut off. At each startup, the microphone unit surely receives a sound signal processing program for operation from the host device 1 and performs operation.