SU911495A2 - Information input device - Google Patents

Description

The invention relates to computing and can be used in devices for inputting visual information into digital computers.

According to the main auth. (F b2175, a device is known comprising a transmitting television tube connected in series, a video amplifier connected to a video monitoring unit, a gating unit, a matching unit, two counters, a comparison circuit, two generators and a pulse shaper, the first counter being connected to the first and a SECOND oscillator connected to the transmitting tele-, vision tube, and with a comparison circuit connected to a pulse shaper connected to a test unit, the input of the second counter is connected to ne The output of the generator is primary, and the output of the matching unit is connected to the computer.

The disadvantage of this device is (the ability to process a television signal only with a progressive scan, which is currently limited, mainly in closed-circuit television systems.

The most widely used full-time television signal is found. A standard television signal consists of two fields. Only odd lines of the frame are expanded in the first field, only even lines of the frame are in the second field. This device does not provide for signal processing with interlaced scanning, which significantly limits the scope of its application.

The purpose of the invention is to expand the scope of the device, by

20 provide information processing of the television signal, both progressive and interlaced.

3

This goal is achieved by introducing a trigger, a third counter and a switch, the outputs of the second and third counters are connected via a switch to the comparison circuit, the second output of the first generator is connected to the input of the third counter and the second trigger input, the first input of which is connected to the first the output of the first generator, the output of the trigger is connected to the control input of the switch.

The drawing shows a structural diagram of the proposed device.

The device contains a transmitting television tube 1, a video amplifier 2, the first generator 3, the second generator A, the first counter 5 the second counter 6, the trigger 7 the third counter 8, the switch 9 comparison circuit 10, the pulse shaper 11, the gating unit 12, the video monitoring unit 13, the unit 1 coordination, digital computer 15.

The device works as follows.

The visual image is converted by the transmitting television tube 1 into a video signal fed to video amplifier 2. The second generator k produces line synchronization pulses fed to the transmitting television tube 1 and to the first counter 5 which is a frequency divider. In the setting of all its bits to the Zero position at the input of counter 5, a pulse arrives at the input of the first generator 3 which produces synchronization pulses of the first and second fields arriving at the transmitting television tube 1. The first output of the generator 3 is connected, the second counter 6, counting the synchronization pulses of the 1st field and the setup input of the trigger 7 and the third counter of the generator 3 is connected to the third counter 8, counting the synchronization pulses of the 2nd floor and the second setup input of the trigger 7. Tr output The igger 7 is connected to the control input of the switch 9. The synchronization impulse of the 1st field trigger 7 is set to one, which is fed to the j / preal of the input of the switch 9 which permits the passage of signals from the outputs of the counter 6 to the inputs of the comparison circuit 10. To the other entrances of the circuit 4954

We 10 comparisons are supplied with information from the outputs of the Sietmik 5. The state of the counters 6 and 5 are compared by the comparison circuit 10 and at a certain ratio

By producing numbers (for example, when they are equal), a signal is output to the pulse shaper 11. The sync pulse of the 2nd floor trigger 7 is set to zero and

0, the switch 9 permits the passage to the inputs of the comparison circuit 10 of signals from the outputs of counter 8, which are compared by the comparison circuit 10 to the state of the counters 5 and, at a certain

5 the ratio of the numbers registered by the counters produces a signal arriving at the driver 11, the signals from the output of the video amplifier 2 are fed to the gate .12. With

If necessary, the signal from the output of video amplifier 2 is also supplied to the video control unit 13. Gating unit 12 transmits a signal from the output of video amplifier 2 to the input of matching unit 1 only if a strobe pulse is fed to the second input of gating unit 12 from the driver 11, i.e. subject to a certain ratio between

0 numbers of the field to be read and the line to be read,

For example, in the first frame, the information of the first line of the first field is passed to the input of the matching unit,

5 i.e. the first line of the raster and the information of the 1st line of the second floor, i.e. second line of the raster. In the second frame, the information of the 2nd line of the first field is skipped, i.e. the third line of the raster and the information of the second line of the second floor, i.e. fourth line of a raster, etc.

In block H, the information is converted into a code arriving

5 to the input devices of the digital computer 15.

When processing a television signal with progressive scan, when the frame consists of one floor, i.e. field sync pulses are frame sync pulses, trigger 7 is always in one state and information from the second counter 6, which counts the number of frame sync pulses, is passed to the input of the comparison circuit 10. Further operation of the device is similar to the above.

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Thus, the proposed device allows the processing of a television signal both with post-mortem and interlaced, twisting, which greatly expands the scope of its application, increases the efficiency of using television systems in information systems and automated control systems.

Claims (1)

1. USSR author's certificate number 462175. cl. G 06 F 3/00, 1973 (prototype).