Film-mode video stream handling method and system
AssigneeHimax Technologies Limited
InventorYing-Ru Chen
Life of this patent
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Abstract
One embodiment of the present invention sets forth a method for detecting a bad edit. The method includes receiving a 3:2 film-mode video signal comprising a sequence of video fields, for each of the sequence of video fields, determining a state for the each video field based on a first moving-pixel count for the each video field with respect to a previous same-parity video field for the each video field and a second moving-pixel count for a first immediately preceding field for the each video field with respect to a second previous same-parity field for the first immediately preceding field, and identifying the 3:2 film-mode video signal as a bad edit if a predetermined state transition has been detected in the sequence of video fields.
Claims12
A 2:2 film-mode detecting method, comprising:
- receiving a video signal comprising a sequence of video fields;
- for each of the sequence of video fields, determining a state for the each video field based on a first moving-pixel count for the each video field with respect to a first previous same-parity video field for the each video field, a first combing-pixel count for the each video field with respect to a first immediately preceding video field for the each video field, a second moving-pixel count for the first immediately preceding video field with respect to a second previous same-parity video field for the first immediately preceding video field, and a second combing-pixel count for the first immediately preceding video field with respect to a second immediately preceding video field for the first immediately preceding video field;
- and
- identifying the video signal as a 2:2 film-mode if a first predetermined state transition has been repetitively detected in the sequence of video fields, wherein a state transition from a first state for one video field in the sequence of video fields to a second state for another video field in the sequence of video fields occurs when a condition involving one or more of a moving-pixel count and a combing-pixel count associated with the sequence of video fields is satisfied.
A bad edit detecting method, comprising:
- receiving a 3:2 film-mode video signal comprising a sequence of video fields;
- for each of the sequence of video fields, determining a state for the each video field based on a first moving-pixel count for the each video field with respect to a previous same-parity video field for the each video field and a second moving-pixel count for a first immediately preceding field for the each video field with respect to a second previous same-parity field for the first immediately preceding field;
- and
- identifying the 3:2 film-mode video signal as a bad edit if a predetermined state transition has been detected in the sequence of video fields, wherein a state transition from a first state for one video field in the sequence of video fields to a second state for another video field in the sequence of video fields occurs when a condition involving one or more moving-pixel counts associated with the sequence of video fields is satisfied.
A non-transitory computer readable medium containing a sequence of instructions for detecting a bad edit, which when executed by a processing unit, causes the processing unit to:
- receive a 3:2 film-mode video signal comprising a sequence of video fields;
- for each of the sequence of video fields, determine a state for the each video field based on a first moving-pixel count for the each video field with respect to a previous same-parity video field for the each video field and a second moving-pixel count for a first immediately preceding field for the each video field with respect to a second previous same-parity field for the first immediately preceding field;
- and
- identify the 3:2 film-mode video signal as a bad edit if a predetermined state transition has been detected in the sequence of video fields, wherein a state transition from a first state for one video field in the sequence of video fields to a second state for another video field in the sequence of video fields occurs when a condition involving one or more moving-pixel counts associated with the sequence of video fields is satisfied.
Dependencies are inferred from the claim text.