Timebase corrector
US5099312A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 7, 1991 |
| Grant date | Mar 24, 1992 |
| Priority date | — |
| Expiry date | Feb 7, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/44
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A timebase corrector for a video signal is comprised of a reference clock signal generating means for generating, on the basis of a first synchronizing signal separated from a reference signal, a reference clock signal which is input to a first analog-to-digital converter for converting an analog input reference signal to a digital signal, a second clock signal generating means for generating a second clock signal which goes high level during a horizontal blanking period on the basis of a first clock signal whose frequency, multiplied by a desired integer, becomes a frequency of the reference clock signal, a line memory which can store an output signal of a second analog-to-digital converter which converts a correction analog signal to be corrected to a digital signal and a third clock signal generating means for generating a third clock signal by delaying the first clock signal in a timebase direction in which three-value reference phase sampling error, which results from sampling an output of the second analog-to-digital converter at a timing of a seond synchronizing signal separated from the correction analog signal in synchronism with the second clock signal is reduced, wherein…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.