Patent · US Expired

Signal processing for a picture signal

US6313881A · kind A · utility

9Cited by

11References

13Claims

0Family size

Assignee

Deutsche Thomson-Brandt GmbH · DE

Inventors

Wolfgang Reinhart · Tengen, DE
Carlos Correa · Villingen-Schwenningen, DE
Dimitri Croise · Villingen-Schwenningen, DE
Rainer Zwing · Villingen-Schwenningen, DE

Key dates

Filing date	Nov 20, 1998
Grant date	Nov 6, 2001
Priority date	—
Expiry date	Nov 20, 2018

Classification

Technology area (CPC G)Physics
CPC primaryG09G2340/0485
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A signal processing method for an analogue picture signal is proposed. In this case, the analogue picture signal originates from a computing unit (10) in which the signal was generated digitally in accordance with a graphics standard such as, for example, EGA or VGA and was subsequently converted into analogue form. The method consists in subjecting the analogue picture signal to analogue/digital conversion at a first chosen sampling frequency, after which the sampled picture is then investigated for picture disturbances, in order to determine a corrected sampling frequency. Further measures relate to the determination of the optimum sampling phase and the determination of the exact position of the active picture relative to the horizontal and/or vertical synchronization pulses.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.