Real time scene change detection in video sequences
First Claim
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1. An apparatus configured to process a digital video signal comprising:
- an input circuit configured to present a digital video signal comprising a plurality of frames;
a processing circuit configured to detect scene changes in said digital video signal by analyzing (i) a current one of said plurality of frames and (ii) two or more other frames; and
an encoder circuit configured to generate an encoded signal in response to said digital video signal and said scene changes, wherein (a) said two or more other frames comprise (i) a first window of frames that are processed before said current frame and (ii) a second window of frames that are processed after said current frame and (b) (i) said first window comprises a first fixed number of frames that are processed before said current frame, (ii) said second window comprises a second fixed number of frames that are processed after said current frame and (iii) said processing circuit detects said scene changes by analyzing changes between said first window and said second window.
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Abstract
An apparatus configured to process a digital video signal comprising an input circuit, a processing circuit and an encoder circuit. The input circuit may be configured to present a digital video signal comprising a plurality of frames. The processing circuit may be configured to detect scene changes in the digital video signal by analyzing (i) a current one of the plurality of frames and (ii) two or more other frames. The encoder circuit may be configured to generate an encoded signal in response to the digital video signal and the scene changes.
24 Citations
13 Claims
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1. An apparatus configured to process a digital video signal comprising:
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an input circuit configured to present a digital video signal comprising a plurality of frames; a processing circuit configured to detect scene changes in said digital video signal by analyzing (i) a current one of said plurality of frames and (ii) two or more other frames; and an encoder circuit configured to generate an encoded signal in response to said digital video signal and said scene changes, wherein (a) said two or more other frames comprise (i) a first window of frames that are processed before said current frame and (ii) a second window of frames that are processed after said current frame and (b) (i) said first window comprises a first fixed number of frames that are processed before said current frame, (ii) said second window comprises a second fixed number of frames that are processed after said current frame and (iii) said processing circuit detects said scene changes by analyzing changes between said first window and said second window. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for processing video, comprising the steps of:
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(A) receiving a video signal comprising a plurality of frames, wherein said video signal is generated in response to (i) a stored signal, (ii) a captured signal, or (iii) a decoded signal; (B) (a) generating one or more transition signals in response to (i) a current one of said frames, (ii) one or more frames that are processed before said current frame and (iii) one or more frames that are processed after said current frame, (b) generating field measures in response to said plurality of frames and (c) calculating a second order derivative of a first transition from a first scene to a second scene; (C) generating an encoded signal in response to (i) said video signal and (ii) said transition signals; and (D) recording said encoded signal. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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Specification