Patent · US Expired

Test and monitoring system for a digital video tape recorder/reproducer

US4907181A · kind A · utility

15Cited by

10References

19Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Rolf Hedtke · Darmstadt, DE
Rolf Loos · Eppertshausen, DE
Roland Mester · Darmstadt, DE
Jurgen Hansel · Darmstadt, DE

Key dates

Filing date	Jun 8, 1988
Grant date	Mar 6, 1990
Priority date	—
Expiry date	Jun 8, 2008

Classification

Technology area (CPC H)Electricity
CPC primaryH04N17/06
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A system for testing and/or monitoring a digital videotape apparatus makes use of the presence several identically equipped recording and reproducing channels to detect or test for errors by comparing the treatment of the same data in two or more channels. Comparisons are made at test nodes between reference "signatures" and actual "signatures" in normal operation or in test operation. Syndrome units are used to test or monitor circuits for protection against errors and for error correction. The monitoring and testing is done in a system which connects a microcomputer to test nodes of the equipment to be tested or monitored over a test bus.

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