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Method and apparatus for capturing video images
| Details |
Inventors: Pyle, Harry S.; Bahr, Norman H.; Nietfeld, Paul G.;
Assignee: Image Data Corporation (San Antonio, TX)
Primary Examiner: Groody; James J.
Assistant Examiner: Lee; Michael H.
Attorney, Agent or Firm: Baker & Botts
Apparatus and method are provided which receive and sample an incoming video image signal asynchronously, and then processes the signal to recover the video image, including video format, for conversion into a preselected video format. The apparatus and methods first sample the video signal using a stable (crystal oscillator) time base clock to reconstruct the frequency of the video signal, i.e., to recover the video format and then using a contrast optimization process to determine the video signal pixel clock rate. |
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DETAILED DESCRIPTION The present invention provides method and apparatus for acquiring video signals having different video formats, determining those formats and their associated parameters, and then optionally converting the video signals to a preselected format.
In a preferred embodiment of the present invention a simple and reliable apparatus receives an incoming video image signal, samples it asynchronously using a stable (crystal oscillator) time base dock, and then processes the signal to recover the video image, including video format and associated parameters, for conversion into a preselected video format.
The methods of the present invention first asynchronously sample or digitize the video signal to reconstruct the frequency of the video signal, i.
e.
, to recover the video format and then determine the video signal pixel clock rate via a contrast optimization process.
The resulting video signal and format parameters then allow for any type of desired reconstruction of the video data, i.
e.
conversion to different video formats.
It is an object of the present invention to provide a simple and reliable apparatus for acquiring video signals having different video formats.
It is an object of the present invention to provide simple and reliable methods for acquiring video signals having different video formats.
It is an object of the present invention to provide apparatus for acquiring video signals having different video formats and converting the acquired signals to a preselected video format.
It is an object of the present invention to provide methods for acquiring video signals having different video formats and converting the acquired signals to a preselected video format.
It is an object of the present invention to provide a video image capture system that does not require prior knowledge of the video format parameters for the incoming video signal.
Accordingly, these and other objects/features and advantages of the present invention will become apparent from the following detailed description, wherein reference is made to the Figures in the accompanying drawings
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