SU1455357A1 - Device for displaying information on television indicator screen - Google Patents

Abstract

The invention relates to computing, is intended for the extraction of information from a computer and can be used in specialized devices displaying graphical information. The aim of the invention is to expand the field of application of the device by displaying information in various television standards. The device comprises a control unit 1, a fixed memory unit 2, a first 3, a second 4 and a third 5 registers, a decoder 6, an adder 7, a television indicator 9, a counter 12 and a multiplexer 13 with corresponding links. The control block I implements the program recorded in block 2 of the permanent memory and sets the periods of formation of the horizontal and frame sync pulses by writing the corresponding codes to the register 5. The data enter the device in the form of words, which are alternately entered into the first 3 and second 4 registers where are shifted, and, the passage through multiplexer 13, goes to adder 7, where a full television signal is generated that controls the display of information on the screen of television indicator 9. Change the value of programmable delays in the block 1 control, provide the ability to change the temporal relationship of the television video signal. Table I. 2 ill. (L ate O1 "h

Description

The invention relates to computing technology, is intended to | output information from a computer and can be used in specialized graphic display devices.

The purpose of the invention is to expand the field of application of the device by displaying information in various television standards.

FIG. 1 shows a functional diagram of the device; in fig. 2 - control unit operation algorithm.

The device contains a control unit 1, a fixed memory unit 2, the first 3, the second 4 and the third 5 registers, the decoder 6, the adder 7, the informational input-output 8 of the device, the TV display 9, the address input-output 10 of the device , a clock output of the device II, a counter 12, a multiplexer 13, an output 14 of a personnel damping device, controlling the output 15 of the device. FIG. 2 positions I days 16-26 denote the block numbers I of the functioning algorithm. : The device works as follows.

Image information is stored in a computer memory (not shown) with which the display device is operating, in the form of a sequence of bytes. Each data byte carries information about one single image point. Changing information in the image storage device is allowed only during

: screen blanking. This function ensures that the 40 signal is mixed into the full television by transmitting to the output 14 frame lasting pulses (OIG) from the fourth output of the third register 5. The direction of transmission of the bus data buffers that match the display device with the computer is controlled by the signal from the third the output of the control unit 1 arriving at the control unit output 15 of the device.

The operation of the device nodes, the television image standard is determined by the program stored in block 2 of the permanent memory. In the process of executing this program, control unit 1 sets the address of the next command at the outputs, which is sent to the address inputs of the permanent memory unit 2 and generated 50

55

the vision signal, as a result of which the horizontal scanning generator of the television indicator 9 will be reset and the beam will be extinguished. Then, the unit 1, similarly to the one described, enters into the third register a 5 new code, where in the bit corresponding to the FID, zero is recorded, and in the bit of the SGI is one. Due to this, a cut of the FID is formed. As a result, the horizontal scan generator of the television indicator 9 is started. The non-linear prime portion remains invisible, i.e. there is a GIS. While the SGI is in progress, the control unit 1 in one of its internal registers sets in its initial state the code of the pointer to the edge of the image point corresponding to

The memory read signal is received from its first output to the read control input of block 2 of the permanent memory. In this case, from command 2 of the permanent memory, the command code is selected, which, via information input / output 8, enters the control unit I, where the command is decoded and executed. Then the next command is executed, etc. After turning on the power, the control block I starts the execution of the program (see Fig. 2) from the beginning.

When executing program block 16 Setting the initial state, first of all, a frait is formed: a horizontal sync pulse (FID) and a lower quenching pulse (GIS), for which the control block I sets the address of the third register 5 to the address output, the code with unigatas in the bits corresponding to the FID and the SGI, and on the first output - a recording signal.

The address is decoded by the decoder 6, as a result of which the first output appears at the level of the logical unit, which enters the recording control input of the third register 5. The coincidence of this signal with the recording signal from the first output of the control unit 1 to the clock input of the third register 5 provides. recording information in the third register 5 from the input-output 8 of the data of the control unit 1. At the outputs of the third register 5, the FID and TIG signals appear. The inputs to the adder 7, these

d

0

five

the vision signal, as a result of which the horizontal scan generator of the television indicator 9 will be reset, and the beam will be extinguished. Then, the unit 1, similarly to the one described above, enters into the third register the 5th new code, where in the category corresponding to the FID, zero is recorded, and in the SGI discharge the unit is recorded. Due to this, a cut of the FID is formed. As a result, the horizontal scan generator of the television indicator 9 is started. The non-linear prime portion remains invisible, i.e. SGI operates. While the SGI is in progress, the control unit 1 in one of its internal registers sets to the initial state the code of the pointer to the edge of the image point corresponding to

Image Sampling Address

Line number code Code of the byte number of the image decomposition image not vertically in the line

Higher address bits

Typically, the initial code state of the current image point contains zeros in fields x 2, 3, and 4. This completes the execution of program block 16. Then the control unit 1 proceeds to the execution of the next block of block 17 Preparing the beginning of the first line. In this case, the control unit 1 sets an address equal to the pointer of the current image point at the address output and generates a read signal at the first run and a receive signal at the third output. These signals are sent to the memory device, the computational space (through the input-output 10 of the address, the clock output I1 of the device and the control output 15. At the same time, the address from the output of the control unit 1 goes to the address input of the decoder 6. The decoder 6 is designed in such a way that addressing the control unit 1 to the reference device of the computer at an even address, the second output is activated, and in the case of accessing the odd address, the third output. Consequently, if the initial value of the pointer is even, then the active The value will be set at the second output of the decoder 6. This level is fed to the recording control input of the first register 3. The read signal generated by the control unit 1 on the MEMR line of the first output goes through the clock output 11 of the device to the read input of the computer’s storage device, in re - as a result of which the word of the image is found from it. The latter through the information input-output device

Minor address bits

35

20 -25

40

45

0

WA 8 enters the information inputs of the first register 3, where it is memorized. Then, control unit 1 increments the pointer of the current image point and repeats the above-described read cycle. However, since the address will now be odd, the second word of the image is stored in the second second register 4. The pointer of the current point of the image again decreases, thus preparing the address to match the next word of the image.

Next, the control unit 1 proceeds to the execution of the next program block 18 Formation of a slice of the SGS, video signal and the sign of the end of the image. In this case, the control unit 1 outputs the zero code to the third register 5 (the output occurs as described in block 16 Setting the initial state}. This creates a slice of the GIS. The termination of the SGI at the first output of the third register 5 causes the signal blocking the operation of the counter 12 to be removed, the clock input of which constantly receives pulses from the second output of control unit 1. The counter 12 changes its state for each input pulse. The state code of the counter 12 goes to the control input of the multiplexer 13, to the information inputs of which The first 3 and second 4 reg bits are received. As a result, a multiplex video signal will be generated at the output of the multiplexer 13, the values of which, at each state from -.- sensor 12, correspond to the times of the first 3 and second 4 registers. those.

elements of the image. This signal arrives at the fifth input of the adder 7, where it is mixed with the quenching and timing pulses. As a result, the full television signal from the output of the adder 7 causes the television indicator 9 to display the image at the beginning of the line. The control unit operates in such a way that at the moment when the counter 12 provides

the transmission through the multiplexer 13 of the last bit of the image from the second register 4, the control unit 1 replaces the image word in the first register-15 block 20 Image end 7rere 3, and when the counter 12 provides the conditional transition to the projection of the first bit of the new word

The control panel outputs the code of the SGI, FID, XI, OIG 1100 in the third register, as a result of which the fronts of the FOG and the FID are formed. Then the code 1000 is output, which ensures the formation of a slice for the FID. The codes are entered into the third register 5 in the same way as described above for block 16. Then, using the time reserve, while the SGI lasts, control unit 1 performs the preparation of the next line beginning, similarly to block 17. Thereafter, control block i executes the program a sign of the end of the image placed in one of the bits of the flag register of the control unit 1. I

the images from the first register 3 are in the second register 4. This process of writing the image codes to registers 3 and 4 is exactly the same as described above (for block 17). Thus, several updates of the contents of the first 3 and second 4 registers can be performed on one of the lines without any degradation of the image quality. While the counter 12 provides scanning of the next pair of words of the image, block 1 of the control

has the ability to calculate the sign of the end of the image. This can be done by comparing the code of the pointer of the current point of the image with a previously known value corresponding to the end of the image

neither The result of the comparison — the sign of the end of the image — must be saved for transmission to the program block 20 End of the image.

All these operations are performed by

The control unit 1 in the intervals between 40 control units is incremented by specifying the contents of the first 3 and second 4 registers. Excessive time intervals in the operation of the control unit 1, arising due to an unrecognizer of the current image point, taking into account the movement of the beam of the television indicator 9 along an invisible row, and compares it with

match the duration of the reproduction - 45 value corresponding to the end of the XI. No image fragments on the line. The result of the comparison is formed exactly in the television indicator and time as well as the sign of the end of the image performed by the control unit 1 of commands. similarly to block 18. Then, the signs necessary for the calculation, depending on the value of this attribute, are compensated by executing a hollow, a delay to the end of the current commands is performed, duplication of commands or a line is performed, and control block 1 passes

to the execution of the program block 22 Generation of the string pulses, which is performed similarly to the block 55 19, with the only difference that the codes entered into the third register 5 have

any other way to implement software delays. After executing the image required by the format of the number of updates, control unit 1 proceeds to execution of the next program block 19 Generation of line pulses. In the process of implementing this function, block 1.

values 111 and 1011, respectively, and the preparation for the beginning of the next line is not done - instead of it, you are block 20 The end of the image is 7 implemented by the conditional transition to

The control panel outputs the code of the SGI, FID, XI, OIG 1100 in the third register, as a result of which the fronts of the FOG and the FID are formed. Then the code 1000 is output, which ensures the formation of a slice for the FID. The codes are entered into the third register 5 in the same way as described above for block 16. Then, using the time reserve, while the SGS lasts, the control unit 1 performs the preparation of the next line beginning, similarly to block 17. After this, the control block i executes the program block 20 End 7-picture images are conditional on transition to

gram according to the previously formed feature of the end of the image placed in one of the bits of the flag register of the control unit 1. I

If the value of this pattern is O, then control block 1 will repeat program blocks 18 and 19, otherwise it will go to block 21 execution. Forming a slice era, a frame of impulses and a sign of the end of XI. The execution of block 21 begins with the entry of control 1 into the third register 5 of the era code, FID, XSI, KGa OOP. This is accomplished in the same way as described above for block 16. This code goes to the output of the third register 5, ensuring the formation of a slice of the FGG and fronts of the XI and Kg. From this point on, the change in the contents of the image storage device of the computer is allowed by the arrival of Kg at the output 4 of the device. Further

the control unit increments the

the current point of the image, taking into account the movement of the beam of the television indicator 9 along the invisible line, and compares it with the previously known

the values 111 and 1011, respectively, and the preparation for the beginning of the next line is not performed — instead, a delay for the equivalent time is performed. Next, the program block 23 End XI is executed, which is similar to block 20. Moreover, if the formation of the XI is still incomplete,

the control unit 1 repeats the execution of the program blocks 21 and 22; otherwise, it proceeds to the execution of block 24 Formation of a slice of SGI, personnel extinguishing impulse and a sign of the end of the OIG. This program block is executed in the same way as block 21 with the difference that code 0001 is sent to the third register 5, which ensures the formation of a slice not only of the GIS, but also of the XI. In addition, the code value of the pointer of the current image point is now compared with the value corresponding to the end of the CHC, and the end indication of the OIG is formed.

Next, the program block 25 Generates line pulses is executed. This block is implemented by control block 1, similarly to block 19 with the only difference that the codes entered in the third register 5 have values of 1101 and 1001, respectively, and the preparation for the beginning of the next line is not performed. Then the final block 26 End.KGI is executed. In the process of performing this function, the control unit 1 analyzes the sign of the end of the OIG: if it is equal to one, then the transition to the beginning of the program — block 17 — is realized, otherwise the OIG playback cycle repeats, starting with block 24.

Thus, the invention provides for expanding the field of application of the device by displaying information in various television standards, the time intervals of which are formed by the control unit 1 when executing the program algorithms stored in the permanent memory unit 2.

Claims (1)

Invention Formula A device for displaying information on a television indicator screen comprising a control unit. th 15 20 25 ao s 40 45 0 the fixed memory block, the first, second and third registers, the decoder and the adder, the information input / output of the control unit, the information input of the third register and the output of the fixed memory block are the information input / output device of the device, first, second, third and fourth the outputs of the third register are connected respectively to the first, second, third and fourth inputs of the adder, the output of which is connected to the input of the television indicator, the address input – output of the control unit, the address input of the fixed memory unit and input the decoder is the address input-output of the device, the first output of the decoder is connected to the write control input of the first register, the first output of the control unit is connected to the read control input of the permanent memory unit, the clock input of the third register and the clock output of the device, characterized in that In order to expand the field of application of the device by displaying information in various television standards, it contains a counter and a multiplexer, the code of which is connected to the fifth input of the adder, W The output of the control unit is connected to the clock input of the counter, the output of which is connected to the control input of the multiplexer, the first and second information inputs of which are connected to the inputs of the first and second registers, respectively, the information inputs of which are connected to the information input output of the device, the clock inputs of the first and second The registers are connected to the first output of the control unit, the write control inputs of the second and third registers are connected respectively to the second and third outputs of the decoder, n rvy output of the third register is connected to the input Installation On counter ty fourth output of the third register is output personnel blanking pulse device, the control output of which is the output of the third control unit. () sixteen FI.2 2f hinge. slice Sgi.ka8r.gat ttmgipsh tashmzh 15 TShrirodaHuecTpotfnyhimpulgg