Patent ID: 7738664

Claim:
An apparatus for fault detection for parallelly transmitted audio signals, being an apparatus for fault detection for parallelly transmitted audio signals transmitted in channels of two systems, comprising: characteristic amount extracting means provided in each system for extracting a characteristic amount in each small region of each audio signal of each system of said parallely transmitted audio signals, characteristic amount comparing means for comparing the characteristic amounts extracted by the characteristic amount extracting means between the two systems, and judging means for judging occurrence of a fault in each system on the basis of the comparison result of the characteristic amount comparing means for fault detection related to redundancy and reliability of the transmitted audio signals, wherein the two systems comprise a working system and a standby system and the working system sends out the audio signal as an output audio signal in usual operation and, when the judging means judges the occurrence of a fault in the working system, the standby system sends out the audio signal as output audio signal instead of the working system by switching according to judgment by the judging means.