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US 8,619,187 B2Granted
Cadence detection in progressive video
AssigneeMarvell World Trade Ltd.
InventorsSanjay Garg, Nikhil Balram, Mainak Biswas, Vipin Namboodiri
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Abstract
Devices, methods, and other embodiments associated with cadence detection are discussed. In one embodiment, an apparatus analyzes a progressive video stream and determines a cadence pattern from the progressive video stream.
Claims20
An apparatus, comprising:
- a frame motion detector configured to analyze progressive frames and to determine motion values between the progressive frames;
- a cadence detector to determine a cadence pattern from the motion values of the analyzed progressive frames;
- and
- a frame rate converter to convert the cadence pattern of the progressive frames to a different cadence that has a different pull-down ratio.
1 more element
A de-interlacer, comprising:
- motion detection logic configured to analyze an input video stream and determine a pattern of motion, the motion detection logic being re-configurable between:
- determining the pattern of motion between interlaced fields when the input video stream is an interlaced stream;
- and
- determining the pattern of motion between progressive frames when the input video stream is a progressive stream;
- a cadence detector configured to determine a cadence pattern from the pattern of motion;
- and
- a converter for converting the input video stream to have a different cadence having a different type of pull-down, wherein the converting is based at least in part on the cadence pattern.
4 more elements
A method, comprising:
- analyzing a progressive video stream and comparing adjacent progressive frames;
- generating motion values between the adjacent progressive frames for a sequence of frames;
- generating and storing cadence information that represents a cadence pattern of the progressive video stream determined from the motion values;
- and
- converting the progressive video steam to a stream having a different cadence that has a different pull-down ratio than the cadence pattern based, at least in part, on the cadence information.
2 more elements
Dependencies are inferred from the claim text.