Patent · US Expired

Method and apparatus for converting the sampling rates of a digital video signal

US5367338A · kind A · utility

14Cited by

8References

4Claims

0Family size

Assignee

Deutsche Thomson-Brandt GmbH · DE

Inventors

Albrecht Rothermel · Neu-Ulm, DE
Rainer Schweer · Mengen, DE
John Stolte · Memmingen, DE
David Gillies · Schreiber, CA

Key dates

Filing date	Feb 8, 1993
Grant date	Nov 22, 1994
Priority date	—
Expiry date	Feb 8, 2013

Classification

Technology area (CPC H)Electricity
CPC primaryH04N5/14
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

When processing a digital video signal, the problem often arises of converting the signal from a first sampling raster which is asynchronous with respect to the line interval to a second sampling raster which synchronous with the line interval. Interpolation filters are used for this purpose. The present invention provide a simple method for the conversion which does not require intermediate D/A or A/D conversion. For each line of the input signal, the phase of samples of the first sampling raster relative to the line synchronization pulse and the total number of the samples for this line are determined and are used to control of the interpolation filter.

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