SU1765816A1 - Device for data displaying on television receiver screen - Google Patents

Abstract

The invention relates to automation and computing and can be used to display information from a computer. The purpose of the invention is to expand the field of application of the device due to the possibility of a projective display of a three-dimensional image of the surfaces of a non-convex polyhedron on the screen plane of a television receiver, which is achieved by introducing a RAM block, first and second multiplexers, a decoder and corresponding functional links. The invention allows a projective mapping to the screen from partially overlapping planes, which, in particular, makes it possible to simulate the effect of sinking of the sides of the swimming means into the water surface. 2 Il.

Description

The invention relates to automation and computing and can be used to display information from a computer.

The purpose of the invention is to expand the field of application of the device due to the possibility of a projective display of a three-dimensional image from the surfaces of a non-convex polyhedron on the plane of the screen of a television receiver.

Figure 1 shows the block diagram of the device; figure 2 - structural diagram of the address generator.

The device contains 1 group address drivers, 2 group memory blocks, AND 3 group elements, OR 4 element, video signal shaper 5, memory block, first 7 and second 8 multiplexers, AND 9 element, register 10, decoder 11, block 12 sync.

Block 12 contains an inverter 13, an element 14, a delay element 15, a counter of 16 points and a counter of 17 rows, a block 6 - a block 18 of RAM, an inverter 19, triggers 20.

Figure 2 is a diagram of a driver of addresses X21 and addresses Y22, registers 23-26, block 27, multiplexers 28, 29, adders 30.31.

The device works as follows.

Information on images on different planes of a nonconvex polyhedron is recorded in the group 2 RAMs of the group. The image of the individual planes may overlap. The recording is carried out at the addresses received from the address inputs of the device group via multiplexers 29.

The law of reading the discretization elements of the image, the elements of which are located in one plane in the case of projective transformations when reflecting information is determined by the formula

Xoay Cl + l / tAi .x + Bi1);

(1) Yoay Ca + lAA xJ + B

cl

with

V4 O SL 00

CS

where I defines the raster line number, a j is the point number in the raster line; A, B, C are conversion factors that are stored respectively in registers 25,23,26.

In block 18, the RAM is stored from the interface between the planes at specific viewing angles of the polyhedron. At the outputs of the decoder 11, signals are generated that indicate from which plane the mapping to a particular raster point is conducted.

When displaying on the screen of a television receiver, for example, the air situation for an aircraft, information on the boundary of the horizon line is also stored in memory block 2, and the horizon color code is stored in register 10.

For projective mapping of images from N planes, it is necessary to have N address generators, each of which works as follows.

Before forming a 1-1 raster line from the microcomputer, in which the device operates, it is necessary to enter into each shaper 1 a reading of the values Ci1, AI, Bi1, C21, Az1, 62 defining the parameters of the projective transformation of each plane of the polyhedron to the television receiver screen. Before the formation of the image frame, the codes of the interfaces between the planes of the polyhedron, the horizon, and the borders of the screen are recorded in the 18-unit block. The switching of the address output and the recording signal from the microcomputer with the inputs of memory block 2 is provided by multiplexers 7 and 8, respectively.

In the process of displaying information, the reading from memory block 18 is performed at addresses formed by a counter of 16 points and a counter of 17 lines included in block 12 of synchronization. The read addresses from memory blocks 2 are determined by the address builder 1.

The signals from the output of the decoder 11 for each raster point open the corresponding elements from the group or element 9, skipping information about the image of the video signal generator 5 image information about the image of the polyhedron visible at this point.

Thus, the invention allows a projective display on the screen of a television receiver of information from the planes of a non-convex polyhedron, when the image of individual planes may partially overlap. In the particular case, this allows one to simulate the effect of the sinking of the sides of the swimming means into the water surface.

Claims (1)

Invention Formula A device for displaying information on a television receiver screen, containing address drivers, a group of RAM blocks, a group of elements AND, an element AND, an OR element, a register, a video signal generator, a synchronization unit, the first and second outputs of which are connected to the first and second clock inputs of the drivers the addresses, respectively, the information, control and address inputs of the driver, the addresses are respectively the information inputs of the first group, the control inputs of the first group and the address The inputs of the device group, the sync inputs of the address formers, the synchronization unit and the video signal generator are the synchronous inputs of the device, the outputs of the address formers are connected to the address inputs of the RAM blocks of the group whose information and control inputs are respectively the information and control inputs of the second group of device, the outputs of the group's RAM blocks are connected to the first inputs of the AND elements of the group, the outputs of which and the output of the AND element are connected to the inputs of the OR element, the stroke of which is connected to the information input of the video signal generator, the output of which is the output of the device for connecting to the video input of the television receiver, the first input of the element I is connected to the output of the register, the information and control inputs of which are respectively the first information and first control inputs of the device, different in order to expand the field of application of the device by providing a projective display of a three-dimensional image from the surfaces of a nonconvex polyhedral It contains the first and second multiplexers, the RAM unit, the decoder information inputs of which are connected to the outputs of the RAM unit, the address and control inputs of which are connected respectively to the outputs of the first and second multiplexers, the control inputs of which are the second control device input, the third output of the synchronization unit is connected to the first information input of the second multiplexer, the second information input of which is the third control input of the device, The fifth and fifth outputs of the synchronization unit are connected to the second and second information inputs 517658166 The first multiplexer, the third informational information input device whose input is an address, the decoder outputs are connected to the input device input, the information inputs of the AND element and the AND elements The RAM input is a group. - U / U 6-s, , " / U s w D Q ttA-.i J 4, L. L- ABOUT but g Mhtojx Upts S yin d. th g L. . -7Л I N s Manage bh. # 23 / H L J