Abstract: The object of the invention is to provide a video switchover detection circuit that reduces the circuit scale and allows high-accuracy detection with a smaller-scale configuration. According to the invention, the video switchover detection circuit comprises a PLL circuit composed of a phase comparator, an LPF, a VCO, and a frequency divider. In the phase comparator, the phase of an external HD as an input signal obtained by shaping the pulse of a horizontal synchronization signal is compared with the phase of an internal HD as a reference signal obtained by dividing the frequency of the output pulse of the VCO in the PLL circuit. In case the phases of the signals differ from each other, an error signal is output from the phase comparator. A first counter counts the period in which the error signal is active, or the time when the phase difference persists.

Abstract: A camera operating apparatus for operating at least one camera unit at an operation speed which is to be changed by an operator, comprises a retainer having an operation surface, a joystick mounted on the retainer and having a center axis, the joystick being pivotable at an inclination angle between the center axes of the joystick positioned at first and second angular positions, angle signal inputting means for inputting an angle signal indicative of the inclination angle of the joystick, a plurality of keys each operatively arranged on the retainer to perform a key-pushed action and a key-released action, each of the keys being operative to input a speed signal indicative of the key-pushed action thereof, the keys including a specified key selected for the operation speed of the camera unit desired by the operator, information recording means for recording specific relevant information between the angle signal inputted from the angle signal inputting means and the speed signal inputted from the specified ke

Abstract: The object of the invention is to provide a video switchover detection circuit that reduces the circuit scale and allows high-accuracy detection with a smaller-scale configuration.

Abstract: A camera operating apparatus for operating at least one camera unit at an operation speed which is to be changed by an operator, comprises a retainer having an operation surface, a joystick mounted on the retainer and having a center axis, the joystick being pivotable at an inclination angle between the center axes of the joystick positioned at first and second angular positions, angle signal inputting means for inputting an angle signal indicative of the inclination angle of the joystick, a plurality of keys each operatively arranged on the retainer to perform a key-pushed action and a key-released action, each of the keys being operative to input a speed signal indicative of the key-pushed action thereof, the keys including a specified key selected for the operation speed of the camera unit desired by the operator, information recording means for recording specific relevant information between the angle signal inputted from the angle signal inputting means and the speed signal inputted from the specified ke