Apparatus for fault detection for parallelly transmitted audio signals and apparatus for delay difference detection and adjustment for parallelly transmitted audio signals
US7876907B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 2008 |
| Grant date | Jan 25, 2011 |
| Priority date | — |
| Expiry date | Aug 27, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/44209
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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 6-1, 6-2. A characteristic amount comparator 7 compares the characteristic amounts and judges occurrence of fault of a fault. Characteristic amount difference calculators 9-1, 9-2, ∥D∥ comparator 10, and faulty system judging unit 11 judges the system having a fault. Majority decision processor 12 and significance judging unit 13 enhance 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.