Low Delay and Low Cost Audio Surveillance System via a New Optimum FIR Digtal Filter

surveillance system can effectively prevent and discover social security problems. And low delay surveillance system can timely reflect the problem to the owner. Reducing the delay by A/D, D/A can effectively reduce the time in surveillance system. This paper proposed a new multi-rate multi-stage design method using Simulated Annealing algorithm. The data of a certain amount of optimized filter is calculated. Comparison of group delay and cost with general filters.