Time base correcting device
US5335077A · kind A · utility
Inventors
Key dates
| Filing date | Jun 26, 1992 |
| Grant date | Aug 2, 1994 |
| Priority date | — |
| Expiry date | Jun 26, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/896
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A time base correcting device inputs a video signal including a sync. signal and a burst signal, produces an error signal representing a phase difference between a clock signal synchronized with the sync. signal and the burst signal, writes the video signal into the memory in synchronism with the clock signal having a phase thereof adjusted in accordance with the error signal, produces an interpolation signal to interpolate a plurality of adjacent error signals along a time base and controls the readout from the memory by the error signals and the interpolation signal. In this manner, it attains time base correction, particularly velocity error correction with high accuracy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.