RU1917U1 - MICRO-COMPUTER INTERFACE DEVICE FOR VIDEO PROCESSING - Google Patents

Abstract

1. The interface device for processing the video signal using a microcomputer, consisting of two formers, a delay unit and an analog-to-digital converter, characterized in that it additionally contains a key unit, while the output of the first former is connected to the input of the delay unit, the output of which is connected with the “Start” input of the analog-to-digital converter, the analog input of which is connected to the output of the video camera preamplifier, the output of the analog-to-digital converter is connected to the input port of the microcomputer, simultaneously of the output of the delay unit is connected to the first input key unit, a third input coupled to an output of the second driver and the second and fourth inputs - with the outlet port of a microcomputer, through which klyuchami.2 control. The device according to claim 1, characterized in that the key unit consists of a 2 • 2 element and / or two 2I inverters.

Description

Interface device for video signal processing using micro-EC1

The proposed utility model relates to devices for interfacing (matching) the operation of a similar npi56opa (camera) with a microcomputer and is intended to automate the measurement and recording of video signal information from a camera using No. 1cro-EV1.

It is known a pairing device implemented in an optical multi-channel analyzer (OMA Ш), consisting of two formers, a delay unit and an analog-to-digital converter. This device is the closest in technical essence and the achieved result of the invention.

Its disadvantage is the complexity of the design, the price is high. In addition, it is focused on the use of specialized cameras designed specifically for use in these devices, with controlled line and frame scanning, and line-by-line scanning of the electron beam.

The essence of the utility model is that the video signal interface device, which consists of two formers of the delay unit and an analog-to-digital converter, additionally contains a key yolk, which consists of a 2x2 element and / or and two inverters 2i, while the output of the first driver is connected to the input of the unit delay unit, the output of which is connected to the start-up input of the analog-to-digital converter; an analogue input, whose analog input is connected to the output of the tele-camera video signal preamplifier, the output of the analogue the input port p, / shkro-computer, at the same time the output of the delay unit is connected to the first input of the key unit, the third input of which is connected to the output of the second driver, and the second and fourth inputs to the output port of the micro-computer 1, through which the key is controlled the essence of the utility model is to simplify and cheapen the design of the interface device,

The description of the model is illustrated in the drawing, which shows: a functional diagram of the device (firm, 1) and a key unit (FIG. 2). The device consists of two formers I and 2, a delay unit 3, analog-to-digital converter (ADC) 4 and a key management unit 5,

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M.cl .: WIR 23/05

Shapers I and 2 are used to form lowercase

and frame sync pulses of control pulses of the required duration 0 polarity to start the ADC 4 and the request to interrupt the operation of the micro / computer.

The delay unit 3 sets the moment of the ADC start-up through a strictly defined roaring after a horizontal pulse.

ASH1 4 is used to convert the amplitude of the analog video signal into a digital code.

The key unit 5 (Fig. 2) serves to control the passage of control pulses generated by formirovt1I I and 2 to interrupt the operation of the micro-EJ. The key control is controlled by a computer.

Key block 5 consists of a 2x2 pi / or element and two 2i inverters.

With a closed cell, 2 and an open cell, 1, the CSI is passed to the output, and with a closed cell and an open cell 2, an increase in the output of horizontal sync pulses is provided.

The device operates as follows: When the working program starts, the micro-EC opens the JECh I in waiting for the arrival of a frame sync pulse. After the KSI code, the key I is closed, and the program occurs at the time of the reverse beam path.

After that, key 2 is opened, allowing 14 access to micro-EM pulses tied to horizontal sync pulses (CCPI). After each AIS of the first half-frame, a control pulse is generated, which, after the time determined by the delay unit 3, starts the ADC 4 to measure the amplitude of the video signal in the line and a request to interrupt the MPiKpo-3HvI to record the 11-bit code from the ADC in naivraTb gzhRsro-EV a,

A similar cycle of measurements of the amplitudes of a video signal in rows occurs in the second half-frame.

Considering that, according to the existing TV standard in the USSR, the total number of active (information) lines in a frame is 375, the maximum number of lines in which measurements are taken can be no more than 375 (288 in odd and 287 in even half frame).

Video signal processing is as follows; measuring the amplitude of a video signal in a string in a certain time interval, converting it into binary code using an ADC, recording and saving this code in a micro-computer's automatic patch. This process occurs synchronously with the scanning frequency of the electron beam of the receiving tube.

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The advantages of the proposed device in comparison with similar lies in the simplicity of design, low cost. The processing of the signal occurs in real time during the usual interlace scan for each half-frame of a standard television scan. In addition, it matches any serial camera with any domestic micro-computer with an input / output port, in particular, with Electronics BK-0010.

Sources of information taken into account when compiling the description:

I. Technical description for the OMA-III spectrum analyzer (U (/ e / g-i i /. “ItU

Claims (2)

1. The interface device for processing the video signal using a microcomputer, consisting of two formers, a delay unit and an analog-to-digital converter, characterized in that it additionally contains a key unit, while the output of the first former is connected to the input of the delay unit, the output of which is connected with the “Start” input of the analog-to-digital converter, the analog input of which is connected to the output of the video camera preamplifier, the output of the analog-to-digital converter is connected to the input port of the microcomputer, simultaneously output of the delay unit is coupled to the first input key unit, a third input coupled to an output of the second driver and the second and fourth inputs - with the outlet port of a microcomputer, through which the key management.  2. The device according to claim 1, characterized in that the key unit consists of a 2 • 2 element and / or two 2I inverters.