This disclosure describes a circuit which is gated to amplify the video portion of a television signal to the exclusion of its synchronizing components, and which permits the amplitude adjusted, the gated signal to be adjsuted, yet without altering the value of its black level.

Apparatus for transducing information relative to an information carrier having a rest position, and for processing transmitted information, comprises equipment including a transducing device for transducing information relative to the information carrier, a device for totaling and indicating operating hours, equipment for positioning the information carrier in an active position and the transducing device, and means operatively associated with the totaling and indicating device and the position...

A video mixer for providing video signals to be displayed on a monitor, which signals may be derived from a character generator and an external video source. The mixer can route character generator video or external video only to the monitor. The mixer may also on command mix these two signals to provide a combined output signal. The mixer has the further capability of deriving horizontal and vertical blanking signals from an incoming synchronization signal and providing them to the character ge...

A video disc for an optical image reproducing system has a storage track formed of pits alternating with lands along a spiral path. The pit depth introduces a phase change of approximately .pi./2 radians between portions of a reading beam that impinge upon pits and portions that impinge upon lands adjacent the pits.

A two-valued digital signal is produced from an analog video signal by taking a fraction of the difference between a white peak signal and a black peak signal. The peak signals decay slowly between video pulses. A jump circuit changes one or both of the peak signals rapidly when the video signal has a certain relation to a delayed and level-shifted replica of the video signal.

An image transmission system. A television camera scans a projected image and generates a video signal. An input circuit converts the video signal into a two-level signal which is sampled and stored digitally on a magnetic disk or drum. After the signals are stored, they are used to reconstruct a video signal by being recombined and combined with blanking, horizontal drive and synchronization signals from the television camera. All timing is controlled by signals recorded on timing tracks on the...

A video gate generator for excluding the sensing of any target other than a target inside the gate generated by digitally sampling a portion of a television raster and producing an output gate comprising left and right boundaries and upper and lower boundaries for superposition on a TV monitor.

A video generator having means for selectively reading out one of many patterns recorded on a first track of a magnetic disc and repeatedly writing this pattern on a second track. The pattern at a desired position on the second track is solely read out to be written on a third track of the magnetic disc, and the video signal thus recorded on the third track is displayed on a CRT display.

A line or rectangle is superimposed on a video picture to direct attention to features of the picture and to indicate heights and angles of lines in the picture. Video signals are sampled to provide synchronizing triggers to timing circuits. Four timing circuits define the vertical position and height, and horizontal position and width of the rectangle or line. One additional timing circuit defines the angle the line makes with the vertical, permitting slanted lines or diamond shapes. The pulses...

A video amplifier, for driving a kinescope, employs two transistors of opposite conductivity arranged in a series path and further having their emitter electrodes coupled together. The amplifier is biased stabilized by a third transistor having the collector electrode coupled to the emitter connection of the two transistors and having a capacitor coupled between the collector and base electrodes. The emitter electrode of the third transistor is returned to a source of reference potential. A unid...