Video signal processing apparatus for producing a composite signal for simultaneous display of data and video information
First Claim
1. A signal processing apparatus for use with a video camera having a physical status said processing apparatus comprising:
- means for generating data signals representing the physical status of the video camera with respect to a fixed frame of reference;
means for receiving video signals from the camera;
means for combining said data signals with said video signals to produce a composite signal by which data information and video information contained in said video signals can be displayed simultaneously but wherein said data information and said video information are substantially distinguishable with said video information being substantially unaffected by the incorporation of said data signals; and
said signal processing apparatus further comprising data encryption means wherein said data signals are digitally encrypted by said data encryption means and incorporated in said video signals using a frame flyback period thereof, and further comprising means for determining a suitable free period in said flyback period for incorporating said data signals in order to avoid corrupting said video signals when combining said data signals and said video signals, said means for determining said suitable free period being operable to test an analogue signal level of a portion of said video signals within said flyback period and to compare said level with a known base level to determine if data information is stored in said portion of the flyback period.
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Abstract
Video signal processing apparatus comprises means for generating data signals representing the physical status of a video camera with respect to a fixed frame of reference, the physical status being the position, orientation, height, altitude or speed, means for receiving video signals from the said camera and means for combining the said data signals with the said video signals whereby to produce a composite signal by which the data information and the video information contained in the video signals can be displayed simultaneously, and means for transmitting the combined signal to a remote location or means for recording the composite signal.
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Citations
18 Claims
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1. A signal processing apparatus for use with a video camera having a physical status said processing apparatus comprising:
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means for generating data signals representing the physical status of the video camera with respect to a fixed frame of reference; means for receiving video signals from the camera; means for combining said data signals with said video signals to produce a composite signal by which data information and video information contained in said video signals can be displayed simultaneously but wherein said data information and said video information are substantially distinguishable with said video information being substantially unaffected by the incorporation of said data signals; and said signal processing apparatus further comprising data encryption means wherein said data signals are digitally encrypted by said data encryption means and incorporated in said video signals using a frame flyback period thereof, and further comprising means for determining a suitable free period in said flyback period for incorporating said data signals in order to avoid corrupting said video signals when combining said data signals and said video signals, said means for determining said suitable free period being operable to test an analogue signal level of a portion of said video signals within said flyback period and to compare said level with a known base level to determine if data information is stored in said portion of the flyback period. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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- 8. A signal processing apparatus for a video camera having a physical status comprising means for generating data signals representing the physical status of the video camera with respect to a fixed frame of reference, means for receiving video signals from said camera, means for combining said data signals with said video signals whereby to produce a composite signal by which data information and video information contained in said video signals can be displayed simultaneously but wherein said data information and said video information are substantially distinguishable with said video information being substantially unaffected by the incorporation of said data signals, data encryption means wherein said data signals are digitally encrypted by said data encryption means and incorporated in said video signals using a frame flyback period, and means for determining a suitable free period in said flyback period for incorporating said data signals in order to avoid corrupting said video signals when combining said data signals and said video signals.
- 11. A video camera for tele-surveillance purposes, said camera being provided with means including broadcast navigational signal receiver and decoder means operating to generate data signals representing a physical position of said camera with respect to a fixed frame of reference, and means for combining said data signals with video signals produced by said camera in such a way that data information and video information are substantially distinguishable with said video information in said video signals being substantially unaffected by said data signals, data encryption means wherein said data signals are digitally encrypted by said data encryption means and incorporated in said video signals using a frame flyback period, and means for determining a suitable free period in said flyback period for incorporating said data signals in order to avoid corrupting said video signals when combining said data signals and said video signals.
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17. In combination:
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a signal processing apparatus comprising; means for generating data signals representing a physical status of a video camera with respect to a fixed frame of reference, means for receiving video signals from said camera, means for combining said data signals with said video signals whereby to produce a composite signals by which data information and video information contained in said video signals can be displayed simultaneously, wherein said data information and said video information are substantially distinguishable with said video information being substantially unaffected by the incorporation of said data signals, data encryption means wherein said data signals are digitally encrypted by said data encryption means and incorporated in said video signals using a frame flyback period, and means for determining a suitable free period in the flyback period for incorporating said data signals in order to avoid corrupting said video signals when combining said data signals and said video signals, and a playback apparatus having decoder means operable to extract said data signal information from said composite signal and to present it for display as a visual overly to said video information.
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18. In combination:
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a video camera for tele-surveillance purposes, said camera comprising; means including a broadcast navigational signals receiver and a decoder means operating to generate data signals representing a physical position of said camera with respect to a fixed frame of reference, and means for combining said data signals with video signals produced by said camera in such a way that data information and video information are substantially distinguishable with said video information being substantially unaffected by said data signals and further comprising data encryption means wherein said data signals are digitally encrypted by said data encryption means and incorporated in said video signals using a frame flyback period, and means for determining a suitable free period in said flyback period for incorporating said data signals in order to avoid corrupting said video signals when combining said data signals and said video signals; and a playback apparatus having decoder means operable to extract said data signal information from said composite signal and to present it for display as a visual overlay to said video information.
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Specification