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Method and apparatus for combining video signals to one comprehensive video signal

  • US 7,268,834 B2
  • Filed: 02/04/2004
  • Issued: 09/11/2007
  • Est. Priority Date: 02/05/2003
  • Status: Active Grant
First Claim
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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:

  • 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, andan output that is arranged to provide a signal indicating whether said predefined repetitive pattern is detected or not, andv) 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; and

    wherein said predefined repetitive pattern includes consecutively arranged sub-patterns.

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