Apparatus and method for monitoring a CCTV camera

Claim 1

An apparatus for monitoring a CCTV monitoring camera, comprising: rotation state detecting means for detecting states in which said monitoring camera is adjusted upwardly, downwardly, left and right, in response to an upward, downward, left and right rotation controller; zooming state detecting means for detecting zooming states of said monitoring camera in response to a zoom controller; and on-screen display control means for generating an on-screen display signal to display the upward, downward, left and right adjusted states and the zooming states of said monitoring camera on the screen of a monitor in response to upward, downward, left and right adjusted state detect signals from said rotation state detecting means and zooming state detect signals from said zooming state detecting means, and then combining the on-screen display signal with a video signal from said monitoring camera to output them to said monitor; wherein said rotation state detecting means includes: a plurality of rectifying means for half-wave rectifying and smoothing output signals from upward, downward, left and right rotating switches in said upward, downward, left and right rotation controller, respectively; a plurality of wave-shaping means for wave-shaping output signals from said rectifying means, respectively; and first and second latching means for latching output signals from said wave-shaping means and outputting upward/downward adjust signals and left/right adjust signals to said on-screen display control means through a plurality of inverter gates, respectively.

Claim 2

An apparatus for monitoring a CCTV monitoring camera, comprising: rotation state detecting means for detecting states in which said monitoring camera is adjusted upwardly, downwardly, left and right, in response to an upward, downward, left and right rotation controller; zooming state detecting means for detecting zooming states of said monitoring camera in response to a zoom controller; and on-screen display control means for generating an on-screen display signal to display the upward, downward, left and right adjusted states and the zooming states of said monitoring camera on the screen of a monitor in response to upward, downward, left and right adjusted state detect signals from said rotation state detecting means and zooming state detect signals from said zooming state detecting means, and then combining the on-screen display signal with a video signal from said monitoring camera to output them to said monitor; wherein said rotation state detecting means includes: a plurality of rectifying means for half-wave rectifying and smoothing output signals from upward, downward, left and right rotating switches in said upward, downward, left and right rotation controller, respectively; a plurality of wave-shaping means for wave-shaping output signals from said rectifying means, respectively; and first and second latching means for latching output signals from said wave-shaping means and outputting upward/downward adjust signals and left/right adjust signals to said on-screen display control means through a plurality of inverter gates, respectively.

Claim 4

An apparatus for monitoring a CCTV monitoring camera, comprising: rotation state detecting means for detecting states in which said monitoring camera is adjusted upwardly, downwardly, left and right, in response to an upward, downward, left and right rotation controller; zooming state detecting means for detecting zooming states of said monitoring camera in response to a zoom controller; and on-screen display control means for generating an on-screen display signal to display the upward, downward, left and right adjusted states and the zooming states of said monitoring camera on the screen of a monitor in response to upward, downward, left and right adjusted state detect signals from said rotation state detecting means and zooming state detect signals from said zooming state detecting means, and then combining the on-screen display signal with a video signal from said monitoring camera to output them to said monitor, wherein said zooming state detecting means includes: an OR gate for ORing output signals from zoom buttons in said zoom lens controller; an inverter gate for inverting an output signal from said OR gate and outputting the inverted signal as a zooming interrupt signal to said on-screen display control means; an AND gate for ANDing the output signal from said OR gate and a clock signal from a clock generator in said zoom lens controller; and an up/down counter for receiving the output signals from said zoom buttons, as UP/DOWN signals and an output signal from said AND gate and a frequency-divided signal from a frequency divider in said zoom lens controller, commonly, as a count clock signal, and performing a zooming up/down counting operation in accordance with the received signals to output count signals to said on-screen display control means.

Claim 5

An apparatus for monitoring a CCTV monitoring camera, comprising: rotation state detecting means for detecting states in which said monitoring camera is adjusted upwardly, downwardly, left and right, in response to an upward, downward, left and right rotation controller; zooming state detecting means for detecting zooming states of said monitoring camera in response to a zoom controller; and on-screen display control means for generating an on-screen display signal to display the upward, downward, left and right adjusted states and the zooming states of said monitoring camera on the screen of a monitor in response to upward, downward, left and right adjusted state detect signals from said rotation state detecting means and zooming state detect signals from said zooming state detecting means, and then combining the on-screen display signal with a video signal from said monitoring camera to output them to said monitor, wherein said zooming state detecting means includes: an OR gate for ORing output signals from zoom buttons in said zoom lens controller; an inverter gate for inverting an output signal from said OR gate and outputting the inverted signal as a zooming interrupt signal to said on-screen display control means; an AND gate for ANDing the output signal from said OR gate and a clock signal from a clock generator in said zoom lens controller; and an up/down counter for receiving the output signals from said zoom buttons, as UP/DOWN signals and an output signal from said AND gate and a frequency-divided signal from a frequency divider in said zoom lens controller, commonly, as a count clock signal, and performing a zooming up/down counting operation in accordance with the received signals to output count signals to said on-screen display control means.

Claim 6

A method for monitoring a CCTV monitoring camera, comprising the steps of: checking whether an on-screen display switch is at its ON state and enabling an on-screen display when the on-screen display switch is at its ON state; checking upward, downward, left and right adjusted states of the monitoring camera detected by a rotating state detecting circuit, upon the selection of the on-screen display mode, and displaying the checked results on the screen; and checking zooming states of the monitoring camera, if a zooming interrupt signal from a zooming state detecting circuit becomes active on the basis of the adjustment of a zoom lens in the on-screen display mode, and displaying the checked results on the screen, wherein said zooming state on-screen display step comprises the steps of: comparing sequentially a zooming adjustment count data value detected from an up/down counter of the zooming state detecting circuit, with a predetermined maximum zooming limit value and a predetermined minimum zooming limit value; if current zooming adjustment data is equal to or more than the maximum zooming limit value, enlarging a camera state display mark displayed on a predetermined portion of the screen to a maximum magnitude; if the current zooming adjustment data is less than the minimum zooming limit value, erasing the camera state display mark; and if the current zooming adjustment data is between the maximum zooming limit value and the minimum zooming limit value, enlarging/reducing the camera state display mark to a corresponding magnitude and displaying the magnitude on the screen.

Claim 7

A method for monitoring a CCTV monitoring camera, comprising the steps of: checking whether an on-screen display switch is at its ON state and enabling an on-screen display when the on-screen display switch is at its ON state; checking upward, downward, left and right adjusted states of the monitoring camera detected by a rotating state detecting circuit, upon the selection of the on-screen display mode, and displaying the checked results on the screen; and checking zooming states of the monitoring camera, if a zooming interrupt signal from a zooming state detecting circuit becomes active on the basis of the adjustment of a zoom lens in the on-screen display mode, and displaying the checked results on the screen, wherein said zooming state on-screen display step comprises the steps of: comparing sequentially a zooming adjustment count data value detected from an up/down counter of the zooming state detecting circuit, with a predetermined maximum zooming limit value and a predetermined minimum zooming limit value; if current zooming adjustment data is equal to or more than the maximum zooming limit value, enlarging a camera state display mark displayed on a predetermined portion of the screen to a maximum magnitude; if the current zooming adjustment data is less than the minimum zooming limit value, erasing the camera state display mark; and if the current zooming adjustment data is between the maximum zooming limit value and the minimum zooming limit value, enlarging/reducing the camera state display mark to a corresponding magnitude and displaying the magnitude on the screen.