Digital method and device for correcting the phase error of a sampled signal as applicable to the correction of television signals
US4503453A · kind A · utility
7Cited by
3References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 19, 1982 |
| Grant date | Mar 5, 1985 |
| Priority date | — |
| Expiry date | Jul 19, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/0991
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
At the time of analog-to-digital conversion by sampling of a sine-wave signal having a frequency F by means of a clock signal having a frequency 4nF where n is a whole number, these two signals exhibit a residual phase error .PHI.. The method for correcting the converted digital signal according to the invention consists in delaying this signal by n periods of the clock signal in a shift register, in multiplying the undelayed signal by cos .PHI., in multiplying the delayed signal by sin .PHI. and in transmitting the results to an adder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.