Patent · US Expired

Method and device for arranging digitized image signals or data in orthogonal rows and columns

US6331875A · kind A · utility

0Cited by

5References

23Claims

0Family size

Assignee

Deutsche Thomson-Brandt GmbH · DE

Inventors

Gangolf Hirtz · Niedereschach, DE
Thomas Hollmann · Villingen-Schwenningen, DE
Albrecht Rothermel · Neu-Ulm, DE
Rainer Schweer · Mengen, DE

Key dates

Filing date	Mar 4, 1998
Grant date	Dec 18, 2001
Priority date	—
Expiry date	Mar 4, 2018

Classification

Technology area (CPC H)Electricity
CPC primaryH04N5/12
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

Television receivers are increasingly making use of digital signal processing. Present-day television receivers use a line-coupled clock system in this case, since this produces an orthogonal pixel array for signal processing on the picture screen. The disadvantage of such a clock grid resides in its problematical generation, in particular when video recorders are used as signal source. According to the invention, video signals are digitized and processed by means of a free-wheeling system clock made from a quartz oscillator. In order not to have to use large buffer memories, the vertical deflection is synchronized with the input signal, but the number of lines per field or frame is varied.

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