Apparatus for fault detection for parallelly transmitted...

Details Apparatus for fault detection for parallelly transmitted... Apparatus for fault detection for parallelly transmitted...

2004-10-05

2010-06-15

Mei, Xu (Department: 2614)

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Multiple channel

C381S058000, C381S080000, C381S085000, C381S123000

Reexamination Certificate

active

07738664

ABSTRACT:
Characteristic amounts in each small region of audio signals transmitted in the working system and the standby system are extracted by characteristic amount calculators6-1, 6-2. A characteristic amount comparator7compares the characteristic amounts and judges occurrence of a fault. Characteristic amount difference calculators9-1, 9-2, ∥D∥ comparator10, and faulty system judging unit11judges the system having a fault. Majority decision processor12and significance judging unit13enhance the reliability of the judgment. 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.

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Japanese Office Action dated Nov. 15, 2006, issued in corresponding Japanese Patent Application No. 2003-372221.

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