SU1527663A1 - Device for recording and playback of video information - Google Patents

Abstract

The invention relates to the field of information storage and is intended for recording and reproducing video information. The aim of the invention is to reduce the search time for video information on a moving magnetic recording medium. This is achieved due to the fact that from the reproduced information from the magnetic recording medium 4, by a group of addresses and features of information frames installed on the operator panel 24, the video information is searched without stopping the magnetic recording medium 4. In this case, the adder 22 compares the current address from register 21 and the addresses set in block 23 of registers. Simultaneously, the reproduced video information is converted into digital form by an analog-digital converter 26, recorded in memory block 28 by a signal from element 29, and displayed on a video monitor when the specified and reproduced video information addresses match. 2 Il.

Description

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The invention relates to an accumulation of information, namely, devices for recording and reproducing video information.

The aim of the invention is to reduce the search time for video information on a moving magnetic recording medium.

FIG. 1 shows the functional diagram of the device; in fig. 2 - time diagrams of his work.

The device for recording and reproducing video information comprises first 1, second 2 and third 3 magnetic heads, information carrier 4, first 5 and second 6 motors, stepper motor 7, distributor 8, block 9 of control of a stepper motor, comb-f-10, TV camera 11, video monitoring device 12, speed sensor 13, engine control unit J4, dresser recording-playback amplifier 15, erase generator 16, frequency modulated signal amplifier 17, amplitude limiter J8, frequency modulators 19 and 20, regist 21, adder 22, register unit 23, operator console 24, control signal generator 25, analog-to-digital converter 26, digital-to-analog converter 27, memory block 28, first And element 29, first And block 30, first delay element 31, driver 32 signals, the second block 33 elements AND, the distributor 34 pulses, the first element OR 35, the second element 36 delay, the second element AND 37, the counter 38 cycles, the generator 39 pulses, the block 40 elements OR, the first 41, the second 42 and the third 43 groups elements And, the second element OR 44.

The magnetic carrier 4 is connected to the first 1, second 2 and third 3 magnetic heads, first 5. and second 6 motors, step motor 7, the outputs of the first 1 and second 2 magnetic heads are connected to the amplifier 17 of the frequency-modulated signal, whose input is connected with the frequency modulator 19 connected to the switch 10, and the output to the amplitude limiter 18 connected to

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to the input of the frequency demodulator 20 connected by the switch 10, the third magnetic head 3 is connected to the record-play amplifier address

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Sa 15, connected to the erase generator 16 and the switch 10, whose information outputs are connected to the register 21, the video monitor 12, and the inputs to the television camera 1 and the operator’s console 24 connected to the first control inputs of the register 21 and the adder 22, output which is connected with the first control input of the operator console 24 connected to the video monitor 12 and the control signal generator 25, the other input of which is connected to the adder 22, and the output to the stepper motor control unit 9 and the control unit 14 As the engine connected to the house of the second engine 6 and the output of the speed sensor 13 connected to the second engine 6, the output of the distributor 8 is connected to the stepper motor 7, and the input is connected to the control unit 9 of the stepper motor, the information outputs of the register 21 are connected to an adder, the input of the analog-digital converter 26 is connected to the switch 10, and the output is connected to the first information input of the memory unit 28, the information output of which is connected to the digital-to-analog converter 27 connected to the video monitor 12, Inline with the driver 32, the outputs of which are connected to the register 21, the adder 22 and the first delay element 31 associated with the control inputs of the register 21 and the adder 22, the information inputs of which are connected with the second block 33 of the elements AND associated with the block 23 registers, the control and informational inputs of which are connected to the operator’s console 24, connected to the memory unit 28, the control unit 28, the first element OR 35, the block of elements OR 40, the second element I 37, the generator 39 of pulses, the control input of the console 24 of the operatorconnected to the first element OR 35, the input of which is connected to the second delay element 36, and the outputs to the 38-clock counter and the distributor 34 pulses ,. control: the outputs of which are connected to the second block of elements AND 33, and the inputs to the second element OR 44, the second input of the latter is connected to the second element 37, which is connected to the pulse generator 39, and the outputs of the second element 37 are connected to the first an element 29 and a 38-clock counter, the outputs of which are connected to the second delay element 36 and the block 40 elements OR connected to the first block of elements AND 30, the second inputs of the first element AND 29 and the first block of elements 30 to the output of the adder 22 , the outputs of the first element And 29 and the first block of elements And 30 are connected to the control inputs of the memory unit 28.

Switch 10 is intended for electronic switching of information and control signals.

The television camera 11 is designed for reading video information (design documentation, graphics, photographs and alphanumeric information) and has high sensitivity, since it is made on a video recorder with magnetic deflection. The television camera contains a video recorder, a horizontal scanning generator, a vertical scanning generator, and a driver. pulses, node for automatic adjustment of the target potential, 1 preamplifier for automatic adjustment of the potential of the miptenium, preduster, video amplifier, node Linear quenching pulses, a node for mixing horizontal sync pulses, a horizontal sync generator, a converter, a trigger pulse generator, a voltage multiplier, an output video amplifier, a matching stage. The change in the illumination of the lens is corrected by the system of automatic control of the target potential. When the illumination on the lens changes from 300 to 1000 lux, the signal changes only by 40%. A significant part of the television camera is built on integrated circuits.

Register 21 is intended to store the current address received from the recording amplifier 15-reproduced addresses through the switch 10 under the control of signals from the operator console 24.

The adder 22 is designed to cyclically compare the current address from the register 21 and the set addresses in the register block 23 and generate comparison control signals.

addresses to go to the motion control carrier 4 stepper motor 7.

The operator console 24 is a functional keyboard for typing addresses and controlling the processes of recording, searching and reproducing information, and also a keyboard for indexing — describing a frame of an image in an information retrieval language. Structurally designed as a separate unit with the appropriate indication of operating modes.

The amplitude limiter 18 in the playback channel performs the functions of a preamplifier playback, providing, together with other blocks at the output, a signal with a specific amplitude and load resistance.

The register unit 23 is designed to store addresses recorded from the operator console 24, and is standard consisting of several registers connected in parallel.

An analog-to-digital converter 26 is standard and is intended to convert a television signal to a digital equivalent for recording in memory block 28.

D / A converter 2 is designed to convert a digital signal to a television analog signal.

The signal conditioner 32 is designed to match the characteristics of the signals in amplitude, duration of load.

The pulse distributor 34 is designed to generate pulses from the first, second, and so on outputs of the signals from the second element OR 44, coming from the generator 39,

Counter 38 clocks is designed to count the number of clocks (and pulses) generated from AND 37 when comparing the addresses in sump 22, and when completed, sets O to the dispenser 34 pulses and the counter 38. clocks, prepares the remote for operation in the next frame 24 operators.

The pulse generator 39 is designed to generate clocking pulses for cyclically comparing the current address with the addresses stored in the second block.

The device works as follows.

When the device is turned on by a signal from the operator’s console 24, the register 21 registers, the register block 23, the cyt-iMaTOpa 22, the pulse distributor 34 and the memory block 28 are set,

In the initial state, the video magnetic information carrier 4 must be set to the initial state, on the operator panel 24 the marking mode of the carrier 4 is turned on (1 output. The address signals generated in the operator panel 24 are fed to the switch 10 and through the recording-reproduction amplifier 15 addresses to the third magnetic head 3 associated with the information carrier 4. With the uniform motion of the stepper motor 7 of the carrier 4, the magnetic head 3 records the current addresses. Thus, the address signals are recorded in, i.e. the markup of the magnetic tape.

The video signal is recorded on the information carrier 4 as follows.

On the operator panel 24, the address and features of the frame of input information (drawing, graphics, photographs, descriptions, etc.), the mode of recording or reproducing frames on the video tape are set.

When recording information on the operator’s console 24, the recording mode, address and characteristics of the input information frames are set. Controlling them to the signals from the second output of the operator’s console 24, the switch 10 switches information and control links to record data from the television camera 11. The control signal from the operator’s console 24 through the second element OR 44 is fed to the second input of the pulse distributor 34, and from the first output of the last, to the first inputs of the first group of elements AND 41. To the other inputs of the first group of elements AND 4J, from the first output 23 of the registers, the address is given, at which it is necessary to record a frame of input information from a television measures 11. Information signals from the output of the first group of elements AND 41 of block 33 arrive at the first information inputs

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The dips of the adder 22 and the control signal from the output of the first delay element 31 are recorded. At the same time, the current address from the information carrier 4 is read by the magnetic head 3 and through the address recording / reproducing amplifier 15, the switch 10 arrives at the information inputs of the register 21. The current address is written to the register 21 by the control signal from the first delay element 31. When comparing the current address coming from the information carrier 4 and the address from the operator’s 24J console, the control signal from the output of the adder 22 through the operator’s console 24 goes to the first control input of the switch 10 and read by the television camera 11 information frame converted into a video signal through the switch 10, the frequency modulator 19, the amplifier 17 of the frequency-modulated signal is recorded by the second magnetic head 2 on the information track of the carrier 4. Similarly, the video camera 11 is read in formation on any address set on the remote operator 24. In this case, in each write cycle, the setting in the O register 21 and the adder 22 is performed by the leading edge of the control frame signal from the driver 32 signals, and the current address codes from the carrier 4 and codes from the operator’s console 24 are recorded from the first delay element 31.

To search for information on media 4 and display data on video monitoring device 12, a group of addresses and features of information frames, frame search and playback modes from a video tape are set on the operator console 24.

By installing the information search mode operator’s remote control 24, the control panel 24 outputs a control signal to the first input of the second element 37, to the other input of which pulses are received from the generator 39. From the output of the 37 element, pulses are fed to the first input of the element 29, the counting input counter 38 cycles and the second input element OR. 44, and from the output of the latter - to the information input of the distributor 34 pulses.

The first pulse from the distributor 34 is fed to the first inputs of the first

a group of elements AND 41 of block 33, the information inputs of which receive the code of the first address from block 23 of registers entered from the pulp 24 of the operator. The signal from the video monitor device 12 through the driver 32 is set to O, the adder 22 and the register 21, and the pulse from the first delay element 31 records addresses from the output of the first group of elements AND 41 to the adder 22, to the other inputs of which current addresses from the information carrier 4 are readable the magnetic head 3, and through the address recording / reproducing amplifier 15, the switch 10 is entered into the register 21 by the control signal from the delay element 31, and the adder 22 compares the current address received from the register Tra 21, and the first address set in block 23 of registers.

When comparing these addresses from the adder 22, the comparison signal is fed to the operator console 24, to the second input of the first element I 29, which controls writing data to the memory block 28, and to the first control input of the block 30 elements I. The address from the operator console 24 is through a block of 40 OR elements, a block of 30 elements AND goes to the second control input of the memory block 28, which is generated by a comparison signal from the adder 22. Parallel to the operator’s console 24, the switch 10 receives a control signal through which the video signal read by the magnetic head 1 che a power amplifier 17 of a frequency-modulated signal, an amplitude limiter 18, a frequency demodulator 20, a switch 10, an analog-to-digital converter 26 is recorded in memory block 28 by a signal from element 29; simultaneously, a frame of information is displayed on the video monitor 12, Visual inspection of the read data from the carrier 4.

If the current address from the carrier 4 and the address from the first group of elements And 41 were not compared, then the second pulse from the generator 39 through the element 37 comes to the input of the distributor 34, from the second output of which the pulse goes to the control inputs of the second group of elements And 42 block 33, the next hell is fed to the other inputs

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ree installed in block 23 registers. In the case of comparing the current address and the address from the second group of elements AND 42, the video signal is recorded in the memory block 28, as indicated by the first control pulse from the distributor 34. Thus, all the addresses set on the operator panel 24 are successively compared with the current the address set in register 21, and comparing with one of the addresses from register block 23, the video signal is recorded in memory block 28 with control of the read information from media 4 on video monitoring device 12.

If none of the addresses from block 23 of the registers were compared with the current address set in register 21, then after all the comparison cycles of the addresses the counter overflows 38 ticks, and from its second output the overflow signal through delay element 36 sets the OR 35 to About the dispenser 34 pulses, the 38-clock counter through the operator control panel 24 prohibits the passage of pulses through the AND 37 element from the generator 39. With the arrival of the following addresses read by the magnetic head 3 from the carrier 4 and fed through the amplifier 15 record-play address, the switch 10 on the information inputs of the register 21,

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The search cycle of information at the specified addresses in the register block 23 is repeated until all the addresses from the information carrier 4 are finished reading. The recording of the video signal in the memory block 28 is controlled from the operator console 24 by generating the read signal at the fourth control input and the information signal through the digital-analog converter 27 is fed to the input of the video monitor 12.

The use of the invention allows several times to increase the speed of information retrieval on a continuous media, reduce the requirements for entering address numbers and improve the speed of recording, searching and playing information by recording video signals into the buffer memory and continuous data search without stopping the media or step-by-step transfer, expand the field of application of the device in the RVOD system, storage and processing of the device.

Claims (1)

An apparatus for recording and reproducing video information comprising a switch connected by a first input through a serially connected frequency demodulator and an amplitude limiter to the output of a frequency modulated amplifier signal connected by an input to the first output of the switch and connected to the first and second magnetic heads via a magnetic carrier recording with a third magnetic head connected through an amplifier to record-play the address with the address pin an oracle connected by information outputs to a video monitor and a register information input and information inputs to the TV camera and operator console connected to the first control inputs of the register and adder connected to the first control input of the operator and the first input of the driver control signals connected by a second input to one of the outputs of the operator’s console connected to the video monitor and the first output via a serial connection Stepper motor control unit, the first pulse distributor to the stepper motor, coupled via the magnetic recording medium to the first motor and the second motor connected via an output speed sensor to the first input of the motor control unit connected to the output of the second motor and the second input to the second output of the driver control signals, and the adder is connected to the information outputs of the register by the corresponding inputs, and also contains the first AND element and the first delay element; so that, in order to reduce the search time for video information on a moving magnetic recording medium, an analog-to-digital converter, a digital-to-analog converter, a memory block, an element block I, a signal conditioner, a group of elements H, a second pulse distributor, the second element delays. register unit, first and second OR elements, second AND element, OR element block, pulse counter and pulse generator, the analog-to-digital converter connected to the switch and output to the information input of the memory block connected by the information output through a digital-to-analog converter to a video monitor connected via a driver to the corresponding inputs of the register, adder and the first delay element connected by an output to the control inputs of the register and adder connected by the corresponding inputs to the outputs of a group of elements And connected by one input to the outputs of the register block connected by one input to the operator’s console and the other inputs to the outputs of the second pulse distributor connected by the output to the operator’s console and to the first input of the pulse counter and through the serially connected first OR element and the second delay element to the first output of the pulse counter connected the second input through the second OR element, connected by one of the inputs to the operator’s console, with the output of the second pulse distributor, and connected by the second input to the output of the second element This AND connected by one input to the operator’s console and each other through a pulse generator with an operator’s console connected to one of the inputs of an OR block connected to another input to the output of a pulse counter and the output to the first input of an AND block whose outputs are connected to the first the control inputs of the memory block, the second control inputs of which are connected to the operator console, while the memory block is connected by the third control inputs to the operator console connected to each other, the control input of the block registers and one of the inputs of the first OR element and the fourth control inputs to the output of the first AND element connected by the first input to the output of the second AND element and the second the entrance to the interconnected the second input block of the elements And the output of the adder.