Image failure detection unit in redundant duplex transmission
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United States of America Patent
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Aug 3, 2004
Grant Date -
N/A
app pub date -
Jun 2, 2000
filing date -
Jun 3, 1999
priority date (Note) -
Expired
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Abstract
There is provided an image failure detection unit in redundant duplex transmission in which a failure occurring on a regular link is detected at in real time, and the link is instantaneously switched to a normal backup link, thereby preventing any failure from occurring on an output image or reducing the failure. Units for calculation of the image features calculate image features of links A and B, respectively. A comparison unit compares the image features, and then, it is judged that both of the links are normal if there is not difference between the image features. To the contrary, if there is a difference, it is judged that there is a probability of occurrence of a failure on one of the links. Thereafter, a normal/corrupted information memory stores a small region relating to the image features. Units for detection of image feature differences determine image feature differences for the links, respectively.
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