SU1125778A1 - Device for forming television picture signal - Google Patents

Abstract

A TELEVISION PICTURE SIGNAL DEVICE, containing a first memory block, a second memory block connected in series, a switching unit whose second input is connected to the output of the first memory block, a digital-analog converter and a body for generating a video signal, the second input of which is connected to the first output of the synchronous generator, the second output of which is connected to the synchronous input of the video monitoring unit, in order to increase the resolution by eliminating noise, transient sampling of the television image signal, the first, second, third and fourth multiplication blocks are entered into it, the first inputs of which are connected to the output of the first memory block, and the outputs to the input adder, the output of which is connected to the signal input of the second memory block, and the unit for forming the weight coefficients, the first, second, third and fourth outputs of which are connected to the second inputs of the first, second, third and fourth multipliers, respectively, and the control signal generating unit The first output of which is connected to the control input of the first memory block, the second output to the control O) inputs of the first, second, third, and fourth multiplication blocks, the third output to the control section of the weighting factor generation unit, the fourth output to the control input of the second memory block and the fifth output - to the control input of the switching unit; the output of the television signal conditioning unit is connected to the signal input of the video monitoring unit, and the third output of the synchro generator is connected to the synchronous signal the house of the control signal generation unit.

Description

The invention relates to television, more precisely to video path schemes designed to form a signal of a television image, and can be used to solve practical problems in which high-quality requirements are imposed on image quality (for example, in image recognition tasks)

A device comprising serially connected a video signal sensor, an analog-to-digital converter, a memory unit, a row sampling unit, a digital-to-analog converter, a television video signal generating unit and a video monitoring unit, as well as a synchronous generator and a control unit, the first second, third and fourth outputs of the synchronous generator to the clock inputs of the video signal sensor, analog-digital and digital-analog converters, as well as the control unit, first, second and third The outputs of which are connected to the control inputs of the memory block, the row selection block and the digital-to-analog converter lj, respectively.

With this device, it is possible to improve the quality of reproducible images by reducing the visibility of the raster image structure only by reducing the visibility of the noise of spatial sampling. The visibility of spatial sampling noise is reduced due to the inertial properties of the phosphor and the observer's visual system, however, the noise of spatial sampling in the video signal is not reduced.

The closest to the technical solution proposed is a device comprising a first memory block, a second memory block connected in series, a switching unit whose second input is connected to the output of the first memory block, a digital-to-analog converter and a television signal generating unit whose second input is connected to the first step of the synchronous generator, the second output of which is connected to the synchronous input of the video monitoring unit, as well as the gating unit, is switched on between the TV signal forming unit as well as a video montage unit, and

the video signal shaping unit of the additional lines, the signal input of which is connected to the output of the first memory block, and the output - with the input of the second memory block, and the third output of the synchronous generator is connected to the clock input of the first memory block and the fourth and fifth outputs to the first and the second clock input of the gating unit, and the sixth output to the clock input of the second memory block 2.

A disadvantage of the known device is that the noise of spatial discretization on the television image is reduced very slightly.

The purpose of the invention is to increase the resolution by eliminating the noise of the spatial sampling of the television image signal.

The goal is achieved by the fact that, in a forming device, a television image signal comprising a first memory block, serially connected a second memory block and a switching unit, the second input of which is connected to the output of the first memory block, a digital-analog converter and a television signal generating unit, the second input of which connected to the first output of the sync generator, the second output of which is connected to the synchronous input of the video monitoring unit, the first, second, third and fourth multiplication units, the first The e inputs of which are connected to the output of the first memory block, and the outputs to the input adder, the output of which is connected to the signal input of the second memory block, as well as the weighting factor shaping unit, the first, second, third, and fourth of which are connected to the second the inputs of the first, second, third and fourth multiplications, respectively, and the control signal generation unit, the first output of which is connected to the control input of the first memory block, the second output to the control inputs of the first, second, third and fourth multiplying units the third output - to the control input of the generating weighting coefficients, a fourth output - to the control input of the second memory block, and n ty

the output is to the upstream input of the switching unit, while the output of the block: the television signal is connected to the signal input of the video control block, and the third output of the synchro-generator is connected to the control signal generating unit.

The drawing shows a structural electrical circuit of the device.

The device for forming the television image signal contains the first 1 and second 2 memory blocks, switching unit 3, digital-to-analog converter 4, television signal generating unit 5, video monitoring unit 6, clock generator 7, control generating signal unit 8, respectively, first, second, third and a fourth multiplying unit 9-12, a weight factor generating unit 13, and an adder 14.

The device works as follows.

In the proposed device, the formation of a television image signal consists in that the video signal of the original television image, which enters the first memory block and consists of Z lines, is stored between the trocs of the original television image. images of the additional video signal and (Z-1) lines, where. p 1,2,3, ... memorize this video signal; between the memorized values of the video signal of the television image, in each of 2 (n + 1) -n lines, the video signal n (a-1) of additional elements of the television image, where a - the number of elements in the line of the stored original television image. Then, the video signal of additional elements is memorized, a synthesized television video signal of an image consisting of 2 (1 + 1) -and lines is formed and converted into an optical image,

In the first memory block 1, the video signal of two adjacent lines of the original image is recorded in digital form backwards. Upon completion: recording the video signal of two lines, the control signal generating unit 8 outputs control code sequences to the control inputs of the first memory block 1 and the block 13 forv.

world weight coefficients. Upon receipt of the control code, the first memory block 1 enters the first inputs of the first 9, second Yu, third 11 e, and fourth 12 multiplications

corresponding to the video signal value of the four elements of the original image involved in the processing. At the same time, the block 13 of forming the weight coefficients results in the second inputs, the first 9, the second 10, the third 11, and the fourth 12 blocks multiplying the value of the weighting coefficients in accordance with the data obtained from the block

2 generation of control signals by a control code. The value of the coefficient depends on the processing law, as well as on the position of the element being formed in the array being processed (under the array being processed).

20 cops will be understood as a set of image elements forming a quadrilateral, at the vertices of which there are elements of the original image involved in processing). The weight processing, as a result of which the value of the video signal of the additional elements is formed, is carried out in accordance with the formula

thirty

  B, -a-482b-A6, -c j B4-ciij,

where Bjj is the value of the video signal of the additional image element located on the 1st line

machined

an array in the jth column,

B, Bg, B, B - values of the video signal, respectively, of the 1st,

2nd, 3rd and 4th elements of the original image, Sec. in the formation of an additional element; Ojj, b, -j, j; , {ij: - weighting factors for Bj, Bg, Bj, V., respectively, when forming an additional image element located on the 1st row of the processed array of elements in the jth column.

When the first 9j of the second 10, third-11 and fourth 12 blocks of the control signal of the control signal generation unit 8 are received at the control inputs, the video signal values of the elements of the original image and the corresponding weights are multiplied in them. The results of the multiplication are fed to the corresponding inputs of the adder 14, in which the final processing of the weighting and the output of which takes place, the summation result, which is the value of the video signal of the generated additional element, is fed to the signal input of the second memory block 2. In the VTOM. Memory block 2, the obtained value of the video signal is recorded in the memory register with the address obtained from the fourth output of the control signal generation block B.

Thus, the formation of the video signal values of all additional elements obtained by processing the video signal values of the elements of two lines of the original image stored in the first memory block 1 is carried out. At the same time, the formation-synthesized video signal of the previous image lines occurs. This is done as follows.

From the first output of the control signal generation unit 8, the control input of the first memory unit 1, the address of the readable memory register is received. The value of the video signal of the coupled element through the switching unit 3, to the control input of which the switching signal arrives from the fifth output of the control signal generating unit 8, enters the digital-to-analog converter 4. Having read the value of the video signal of the source image from the first memory unit 1, unit 8 generating control signals is generated at the fourth output

the sequence of addresses of the regisgpb of the second memory block 2 to be shared. The reading of the values of video signals of additional elements from the second memory block 2 occurs in the same way as the reading of the video signal values of the elements of the original image, the values of the video signals through the switching block 3 arrive at

digital-to-analog converter 4. As a result of reading the values of the video signal of the original and additional elements, the video signal of the synthesized television image in analog form is formed at the output of the digital-analog converter. This video signal is fed to the signal input of the television signal generation unit 5, the control input of which from the first output of the synchro generator 7 receives the horizontal and vertical sync pulses, as well as the horizontal and vertical quenching pulses. The synthesized television video signal obtained by mixing the horizontal and vertical damping pulses and the horizontal and vertical clock pulses into the synthesized video signal is fed

to the signal input of the video monitoring unit 6 and is converted therein into an optical image. To control the operation of the video monitor unit .6, its sync input is fed

impulses hundred and;, from the second output

sync generator 7. In addition, the sync generator 7 outputs from the third wave the sync pulses arriving at the synchronous input of the control signal generating unit 8. The frequency of these sync pulses is determined by the upper frequency of the control signals generated by block 8.

 Thus, a television image signal is generated with an increase in relation to the original number of lines and the number of elements in a line. Denoting by k the number of additional elements between two elements of the original image adjacent in a row, where K is 1,2,3, ..., then the total number of elements of the synthesized line is ca (v: 4l) -V :. in general

P may not be equal to K. .

Therefore, in the reproduced image, by increasing the number of decomposition elements, the same image format eliminates noise.

7

the spatial discretization of the image, due to the discrete structure of the image, increases the resolution of the television system. Through weight processing of the video signal, false contours in the image are eliminated. The resolution of the television system is increased in both the vertical and horizontal directions. By varying n and k, one can achieve varying degrees of resolution increase in different directions, as well as 257788

Noah visibility of the discrete structure of the image. In this case, the digital-to-analog converter should operate with a correspondingly increased clock frequency. The mode differences in this case will also have a television signal generation unit (the frequency of following 10 sync pulses, horizontal damping pulses, etc., will increase, as well as the video monitoring unit. A wider frequency grid than in the known device should also be provided by the synchro-generator.

Claims (1)

A TELEVISION IMAGE SIGNALING DEVICE, comprising a first memory block, a second memory block connected in series, a switching block, the second input of which is connected to the output of the first memory block, a digital-to-analog converter and a television signal generating block, the second input of which is connected to the first output of the clock generator, the second output of which It is connected to the sync input of the video control unit, which is due to the fact that, in order to increase the resolution by eliminating spatial noise To sample the signal of a television image, it introduced the first, second, third, and fourth multiplication units, the first inputs of which are connected to the output of the first memory unit, and the outputs to the input adder, the output of which is connected to the signal input of the second memory unit, as well as the formation unit weight coefficients, the first, second, third and fourth outputs of which are connected to the second inputs of the first, second, third and fourth multiplication units, respectively, and a control signal generating unit, the first output which is connected to the control input of the first memory block 19, the second output to the control inputs of the first, second, third and fourth multiplication blocks, the third output to the control input of the weighting unit, the fourth output to the control input of the second memory block, and the fifth output - to the control input of the switching unit, while the output of the television signal generating unit is connected to the signal input of the view of the monitoring unit, and the third output of the clock generator is connected to the sync input of the forming unit control signals. > 112.5778