Apparatus for fault detection for parallelly transmitted audio signals and apparatus for delay difference detection and adjustment for parallelly transmitted audio signals

Abstract

Characteristic amounts in each small region of audio signals transmitted in the working system and the standby system are extracted by characteristic amount calculators--. A characteristic amount comparatorcompares the characteristic amounts and judges occurrence of fault of a fault. Characteristic amount difference calculators--, ∥D∥ comparator, and faulty system judging unitjudges the system having a fault. Majority decision processorand significance judging unitenhance the reliability of the judgement. Delay difference of audio signals between systems is roughly detected by sub-sampling audio signals of two systems and comparing them, and then accurately detected without sub-sampling. Delay difference between audio signals is adjusted by the detected delay difference.