Detecting content based defects in a video stream
First Claim
1. An apparatus for detecting content based defects in a video stream comprising:
- a plurality of detectors, each having an input coupled in parallel to receive the video stream and having an output, the output from each detector providing a separate specified content characteristic of the video stream;
means for determining whether one of the separate specified content characteristics meet a predetermined alarm criterion; and
means for reporting an error when the predetermined alarm criterion is met.
1 Assignment
0 Petitions
Accused Products
Abstract
A method of detecting content based defects in previously compressed video streams decodes a video channel from the compressed video streams and performs a match on a frame/field basis between each frame/field of the video channel and a black frame/field and/or a previous frame/field to detect missing frames/fields and/or duplicate frames/fields. The number of consecutive missing and/or duplicate frames/fields are counted and an alarm signal is generated when the count exceeds a specified value. A beat pattern detector may be used to differentiate between 3/2 pulldown and other duplicate frame/field content errors, and a graphics detector may be used to differentiate between lettering/graphics stills and other duplicate frame/field content errors.
-
Citations
17 Claims
-
1. An apparatus for detecting content based defects in a video stream comprising:
-
a plurality of detectors, each having an input coupled in parallel to receive the video stream and having an output, the output from each detector providing a separate specified content characteristic of the video stream;
means for determining whether one of the separate specified content characteristics meet a predetermined alarm criterion; and
means for reporting an error when the predetermined alarm criterion is met. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A method of detecting content based defects in a video stream comprising:
-
detecting a specified content characteristic in the video stream using a plurality of detectors, each having an input coupled in parallel to receive the video stream and having an output coupled to the determining means, the output from each detector providing a separate specified content characteristic as the specified content characteristic;
determining whether the specified content characteristic meets a predetermined alarm criterion; and
reporting an error when the predetermined alarm criterion is met. - View Dependent Claims (16, 17)
-
Specification