Method and apparatus for combining video signals to one comprehensive video signal
First Claim
1. An apparatus for combining a first video signal with a second video signal, wherein said video signals represent video images and wherein at least the first video signal represents a sequence of video images, said apparatus comprising:
- i) a first input for input of the first video signal, ii) a second input for input of the second video signal, iii) an output for output of a third video signal, iv) a keying-pattern detector connected to said second input for detecting a predefined repetitive pattern, wherein said keying-pattern detector comprises;
a means for receiving and/or storing a representation of the predefined repetitive pattern, and an output that is arranged to provide a signal indicating whether said predefined repetitive pattern is detected or not, and v) a video switch connected to said first input, said second input, said output and said output of the keying-pattern detector for continuously selecting a video signal from one of the first and second input to be represented in a third video signal, said selection being controlled by a signal from the output of the keying-pattern detector.
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Abstract
Method and apparatus for combining a first video signal and a second video signal. The method comprising the act of replacing data in the second video signal with corresponding, in respect of a position within an image, data from the first video signal when said data in the second video signal represent a predefined repetitive pattern. The apparatus comprising a first input for input of the first video signal; a second input for input of the second video signal; an output for output of a third video signal; a keying-pattern detector connected to said second input for detecting a predefined repetitive pattern, wherein said keying-pattern detector comprises a means for receiving and/or storing a representation of the predefined repetitive pattern, and an output that is arranged to provide a signal indicating whether said predefined repetitive pattern is detected or not; and a video switch connected to said first input, said second input, said output and said output of the keying-pattern detector for continuously selecting a video signal from one of the first and second input to be represented in a third video signal, said selection being controlled by a signal from the output of the keying-pattern detector.
41 Citations
20 Claims
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1. An apparatus for combining a first video signal with a second video signal, wherein said video signals represent video images and wherein at least the first video signal represents a sequence of video images, said apparatus comprising:
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i) a first input for input of the first video signal, ii) a second input for input of the second video signal, iii) an output for output of a third video signal, iv) a keying-pattern detector connected to said second input for detecting a predefined repetitive pattern, wherein said keying-pattern detector comprises;
a means for receiving and/or storing a representation of the predefined repetitive pattern, and an output that is arranged to provide a signal indicating whether said predefined repetitive pattern is detected or not, and v) a video switch connected to said first input, said second input, said output and said output of the keying-pattern detector for continuously selecting a video signal from one of the first and second input to be represented in a third video signal, said selection being controlled by a signal from the output of the keying-pattern detector. - View Dependent Claims (2, 3, 4)
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5. A method for combining a first video signal with a second video signal, wherein at least the first video signal represents a sequence of video images, and said method comprising the act of:
replacing image data in the second video signal with corresponding, in respect of a position within an image, image data from the first video signal when said image data in the second video signal includes a predefined repetitive pattern. - View Dependent Claims (6, 7, 8, 9, 10)
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11. A method for combining a first video signal and a second video signal into a third video signal, wherein each video signal represent a video image and wherein at least the first and third video signals represents a sequence of video images, said method comprising the acts of:
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receiving said first video signal from a first source, receiving said second video signal from a second source, detecting whether image data in a predetermined number of pixels of said second video signal corresponds to image data in pixels of a predefined repetitive pattern, and if the image data in the predetermined number of pixels do not correspond to image data in the pixels of the predefined repetitive pattern, then outputting a portion of said second video signal that corresponds to said predetermined number of pixels, or if the image data in the predetermined number of pixels do correspond to image data in the pixels of the predefined repetitive pattern, then outputting a portion of said first video signal that corresponds, in respect of position within an image, to said predetermined number of pixels. - View Dependent Claims (12, 13, 14, 15)
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16. A video signal, wherein each pixel of a video image of said video signal is represented by a luminance value and two chrominance values, said video signal comprising:
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a digitally generated background, in which the luminance values of the pixels are defining a predefined repetitive pattern, and a digitally generated video graphic foreground. - View Dependent Claims (17, 18, 19, 20)
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Specification