Signal time difference detector

摘要: PURPOSE: To accurately detect a signal time difference real by band passing filtering and envelope extracting voice output from microphone. CONSTITUTION: Voice signals microphones M1, M2 are input to BPFs 33a, 43a via preamplifiers 31, 41. The pass filter the members 36a, 46a. outputs of 46a converted A-D converters 38, 48. A finite impulse response (FIR) 11 executes digital converter an adder 12. 12 subtracts 48, error subtracted result is controller 10. 10 so varies weighting coefficient that square becomes minimum vary delay value, value as two signals. COPYRIGHT: (C)1996,JPO