Method and system for detecting fade transitions in a video signal
First Claim
1. A method of detecting fade transitions in a digital video signal made up of a series of video images, comprising:
- segmenting a plurality of the video images, each of the plurality of video images segmented into a first number of cells, each cell comprising a second number of pixels, a pixel having a pixel intensity value representing the intensity of the pixel;
generating a plurality of cell intensity vectors each associated with one of the segmented video images, each element of the cell intensity vector associated with one of the cells and proportional to the average of the pixel intensity values for the pixels in that cell;
generating a fade-detect signal for a segmented video image in response to the cell intensity vector for that image.
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Abstract
A method and system for detecting fade transitions in a digital video signal made up of a series of video images is disclosed. In accordance with the method of the invention, a plurality of the video images are segmented into a number of cells wherein each cell comprises a number of pixels having a pixel intensity value representing the intensity of that pixel. A plurality of cell intensity vectors each associated with one of the video images is generated wherein each element of the cell intensity vector is associated with one of the cells and comprises a value proportional to the average of the pixel intensity values for that cell. A fade detect is generated for a particular video image in response to the cell intensity vector for that image.
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Citations
19 Claims
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1. A method of detecting fade transitions in a digital video signal made up of a series of video images, comprising:
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segmenting a plurality of the video images, each of the plurality of video images segmented into a first number of cells, each cell comprising a second number of pixels, a pixel having a pixel intensity value representing the intensity of the pixel; generating a plurality of cell intensity vectors each associated with one of the segmented video images, each element of the cell intensity vector associated with one of the cells and proportional to the average of the pixel intensity values for the pixels in that cell; generating a fade-detect signal for a segmented video image in response to the cell intensity vector for that image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A computerized system for detecting fade transitions in a digital video signal made up of a series of video images, comprising:
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a computer-readable medium; and a computer program encoded on the computer-readable medium, the computer program further operable to segment a plurality of the video images, each of the plurality of video images segmented into a first number of cells, each cell comprising a second number of pixels, a pixel having a pixel intensity value representing the intensity of the pixel; generate a plurality of cell intensity vectors each associated with one of the segmented video images, each element of the cell intensity vector associated with one of the cells and comprising the average of the pixel intensity values for the pixels in that cell; generate a fade-detect signal for a video image in response to the cell intensity vector for that image. - View Dependent Claims (15, 16, 17, 18)
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19. A computerized system for detecting fade transitions in a digital video signal made up of a series of video images, comprising:
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a storage medium; a processor coupled to the storage medium; a digital video signal source coupled to the storage medium and providing the digital video signal to the system; a computer program stored in the storage medium, the computer program operable to run on the processor and process the digital video signal, the software further operable to segment a plurality of the video images, each of the plurality of video images segmented into a first number of cells, each cell comprising a second number of pixels, a pixel having a pixel intensity value representing the intensity of the pixel; generate a plurality of cell intensity vectors each associated with one of the segmented video images, each element of the cell intensity vector associated with one of the cells and comprising the average of the pixel intensity values for the pixels in that cell; generate a plurality of intensity change vectors each associated with one of the segmented video images, the intensity change vector for a video image comprising the cell intensity vector for that video image minus the cell intensity vector for another video image; generate a fade signal comprising a plurality of fade values, each fade value associated with a segmented video image, the fade value for a specific image comprising the difference between the total number of elements of the intensity change vector for the specific image having a value between a first lower limit and a first upper limit and the total number of elements of the intensity change vector for the specific image having a value between a second lower limit and a second upper limit; filter the fade signal to produce a filtered fade signal comprising a plurality of filtered values, each filtered value associated with a segmented video image; generate a fade-detect signal for a segmented video image if the filtered value associated with that segmented video image exceeds a first threshold value.
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Specification