Switching apparatus for digital signals
US5440591A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1992 |
| Grant date | Aug 8, 1995 |
| Priority date | — |
| Expiry date | Apr 10, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/268
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A circuit for preserving a predetermined timing relationship between a synchronization signal including periodic sync codes and a digital signal composed of successive frames of which the nominal duration is equal to the period of the sync codes includes a delay device connected to receive the digital signal. The delay device is selectively adjustable to impose a controllable delay on propagation of the digital signal. A FAW detector detects a frame alignment word in the digital signal, and a time measurement circuit measures the time that elapses between occurrence of a sync code and detection of a frame alignment word. A delay adjustment circuit is responsive to the time measurement circuit to adjust the delay imposed by the delay device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.