JPH0224698A - X-ray image processor - Google Patents

Abstract

PURPOSE:To improve the efficiency of a system by providing plural buffer memories where character data are written at a time at the same rate and read out at mutually different rates, plural display devices, and a controller. CONSTITUTION:The character data is inputted to a character memory 11 by the access of a CPU and read out of the memory 11 with a readout signal RE1, and the data is written in the buffer memories 17 and 27 with write signals WE17 and WE27 from the memory controller 6. Then the signal RE17 from the controller 6 is read out of the memory 17 to a character generator 12 so that the image is displayed on a TV monitor with resolution of 1,051 scanning lines. Further, the signal RE27 from the controller 6 is read out to a character generator 22 so that the data is displayed with 525 scanning lines. Then, the signals after the character font conversion by the generators 12 and 22 are put together with various signals by overlay circuits 13 and 23 and D/A- converted 14 and 24 to display the TV images on the TV monitor 15 with 1,051 scanning lines and on the TV monitor 25 with 525 scanning lines.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention provides an X-ray image processing device in which an image display unit consisting of a plurality of display systems with different display speeds is provided in parallel to a CPU bus. Regarding.

(Prior Art) Conventionally, X-ray diagnostic equipment has been equipped with an X-ray digital image processing device using an X-ray TV camera. This image processing device is equipped with a high-definition skin display system that uses a method consisting of 1051 scanning lines and a general TV display system that uses a method that uses 525 scanning lines in parallel with the CPU. The same clear digital image is simultaneously displayed on the image display section.

FIG. 3 is a block diagram showing an image display section of a conventional X-ray digital image processing apparatus. In the figure, character memory 11. Character generator 12, overlay circuit 13. D/A converter 14. A TV monitor 15 constitutes a high-definition display system 1 that employs a scanning line 1051 method. The character memory 11 has 1,051,051 scanning lines for high-definition display, and inputs character data such as characters and figures from the CPU bus 3 and stores this data. Character memory 11 is generally SRAM.

DRAM is used. Character generator 12
converts the character data from the character memory 11 into a character font. The overlay circuit 13 receives image data sent from an image memory (not shown),
Various data 1B such as graphic data sent from a graphic memory (not shown) and character font data from the character generator 12 are synthesized. The D/A converter 14 converts the digital signal from the overlay circuit 13 into an analog signal. The TV monitor 15 inputs the analog signal from the D/A converter 14 and displays images such as characters and figures.

On the other hand, character memory 21. character generator 2
2. Overlay circuit 23. A D/A converter 24° TV monitor 25 constitutes a general TV display system 2 that employs a 525 scanning line system, and this display system 2 is connected in parallel with the display system 1 to the CPU bus 3. has been done. Also character memory 21. Character generator 22. Overlay circuit 23° D/A converter 24. TV monitor 25
is the character memory 11. character generator 1
2. Automatic lay circuit 13. D/A converter 14. T
The V monitor 25 operates in the same manner as the corresponding one.

According to such a configuration, character data such as patient information and date are accessed by a CPU (not shown), and
It is written into the character memory 11.21 via the U bus 3, and further read out from the character memory 11.21 to the character generator 12.22.

The signal converted into a character font by the character generator 12.22 is sent to the overlay circuit 13.23.
The signal is combined with various signals by the D/A converter 14 and converted into an analog signal by the D/A converter 14 and 24. Thus, a high-definition, clear image with 1051 scanning lines is displayed on the TV monitor 15 using both analog signals, and a general TV image with 525 scanning lines is simultaneously displayed on the TV monitor 25.

(Problem to be Solved by the Invention) However, since the image display speed of the display system 1 consisting of 1051 scanning lines and the display system 2 consisting of 525 scanning lines differs by twice, the character memories 11 and 21 are In the past, character data had to be written or read through access from the CPU.

Therefore, the CPU had to access each character memory 11.21 one by one, and it took a considerable amount of time to transfer the character data. Further, in software processing, there is also a problem in that complicated processing must be performed.

SUMMARY OF THE INVENTION An object of the present invention is to provide an X-ray image processing apparatus that can easily access character data to shorten data transfer time, simplify software processing, and improve system efficiency.

[Structure of the Invention] (Means for Solving the Problems) In order to solve the above problems and achieve the objects, the present invention takes the following measures. That is, the present invention has one character memory that stores character data such as characters and figures from the CPU bus, and is connected in parallel to the output of this one character memory so that the character data is simultaneously written at the same rate and different from each other. a display system with a number of stages consisting of a plurality of buffer memories that read data at a rate, a plurality of display means each connected to each buffer memory and displaying with scanning lines corresponding to the boundary rate; and a display system that reads character data for the plurality of buffer memories. The apparatus includes an image display section provided with a control means for controlling writing or reading.

(Effects) By taking such measures, the following effects are achieved. Since one character memory is provided, and a buffer memory is used for each display means for outputting this character memory, the character memory is halved, and the cost can be reduced by using the buffer memory. Furthermore, since the CPU only needs to access one character memory, data transfer time can be shortened, software processing can be simplified, and system efficiency can be improved.

(Embodiment) FIG. 1 is a block diagram showing an embodiment of an image display section of an X-ray digital image processing apparatus according to the present invention. Furthermore, the third
Components that are the same as those in the figures are given the same reference numerals and detailed explanations will be omitted. Buffer memory 17. Character generator 12. Overlay circuit 13. D/A converter 1
4. The TV monitor 15 constitutes a display system 3 consisting of 1051 scanning lines.

Buffer memory 27. Character generator 22. Overlay circuit 23. D/A converter 24. The TV monitor 25 constitutes a display system 4 consisting of 525 scanning lines.

The buffer memory 17.27 is the character memory 11.
The character data in the character memory 11 is simultaneously written at the same rate and read out at a rate corresponding to 1051 and 525 different scanning lines, respectively. 1 buffer memory,
The two memory devices are, for example, inexpensive FIFφ memories (line memories), which can write and read data line by line in the horizontal direction. Further, a CPU (not shown) accesses only the character memory 11 via the CPU bus 3.

The memory controller 6 is connected to the buffer memory 17゜27.
This is to asynchronously control writing and reading of character data to and from the memory.

FIG. 2 is a timing diagram showing control of writing and reading character data into and from the buffer memory 17, 27 by the memory controller 6. As shown in FIG. 2, the access ACS for writing or reading character data between the CPU and the character memory is controlled by the vertical blanking signal BLK.
During the blanking period B of the memory controller 6
It is designed to be carried out by Buffer memory 17
．． Writing to 27 is performed using write signals WE17.27 from memory controller 6. Write signal W
E17.27 is synchronized with the read signal REI and is enabled only during the screen display period, and each buffer memory 17.2
7. At the time of writing, character data is simultaneously read out using different read signals RE17 and RE27.

Next, the operation of the embodiment will be explained with reference to FIG. 2 as appropriate. First, as shown in FIG. 2, character data is input from the CPU bus 3 into one character memory 11 by access from the CPU and is written therein. This character data is read from the character memory 11 by the read signal REI, and written into the buffer memory 17.27 by the write signal W E 17.27 from the memory controller 6 in synchronization with the read signal REI. Next, the data is read out from the buffer memory 17 to the character generator 12 at a transfer rate of 32 μS in response to a read signal RE 17 from the memory controller 6 to be displayed on the TV monitor 15 with 1051 lines. In addition, in order to display the scanning line 525 tree on the T and V monitor 25, a read signal RE 27 from the buffer memory 27 is transmitted from the buffer memory 27 to 6.
The data is read out to the character generator 22 at a transfer rate of 4 μs. The signal converted into a character font by the character generator 12.22 is sent to the overlay circuit 13.
The signal is synthesized with various signals by the D/A converter 14 23 and converted into an analog signal by the D/A converter 14 24 . Thus, a high-definition, clear image with 1051 scanning lines is displayed on the TV monitor 15 using both analog signals, and a general TV image with 525 scanning lines is simultaneously displayed on the TV monitor 25.

According to this embodiment, since the inexpensive buffer memories 17 and 27 are connected in parallel to only one character memory 11, characters can be displayed simultaneously on the TV monitors 15 and 25 with different display speeds. The character memory is halved and the cost is reduced by using buffer memory. Furthermore, since the CPU only needs to access one character memory, data transfer time can be shortened, software processing can be simplified, and system efficiency can be improved.

Note that the present invention is not limited to the embodiments described above. In the embodiments described above, character memory has been described, but other memories such as graphic memory, blanking memory, etc. may be used. It goes without saying that various other modifications can be made without departing from the gist of the present invention.

[Effects of the Invention] According to the present invention, there is one character memory that stores character data such as two characters and figures from the CPU bus, and a memory that is connected in parallel to the output of this one character memory and stores the same character data. a plurality of display systems comprising a plurality of buffer memories that simultaneously write at different rates and read at different rates; a control means for controlling writing or reading of character data to and from the buffer memory;
Since it is equipped with an image display section equipped with
Furthermore, it is possible to provide an X-ray image processing apparatus that can simplify software processing and improve system efficiency.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the image display section of the X-ray digital image processing apparatus according to the present invention, and FIG. 2 is a timing diagram showing control of writing and reading character data into the buffer memory by the memory controller. be. FIG. 3 is a block diagram showing an example of a conventional X-ray digital image processing device. 1.2.4.5...Display system, 3...CPU bus, 6
...Memory controller, 11.21...Character memory, 12.22...Character generator, 1
3゜23...Overlay circuit, 14.24...D/
A converter, 15°25...TV monitor, 16.213
...graphic memory and image memory, 17
．． 27...Buffer memory, REI, REI7.
27...Read signal, WE17.27...Write signal. Applicant's agent: Patent attorney Takehiko Suzue Procedure: Ichimasa, September 12, 1988, Patent Application No. 173,703 No. 1983 Name of the invention X-ray image processing device 7 Contents of amendment (1) Description page 4 No. 3 rTV monitor 2 listed in the row
Correct 5J to "rTV monitor 15". "Display system 3" and "display system 4" written on page 7, line 8 of the specification are corrected, and "display system 4" written on line 11 of the same page is corrected to "display system 5." 3゜Relationship with the amended person case Patent applicant (307) Toshiba Corporation 4゜

Claims (1)

[Claims] One character memory that stores character data such as letters and graphics from the CPU bus, and a plurality of character memories that are connected in parallel to the output of this one character memory and that write the character data simultaneously at the same rate and read it at different rates. a buffer memory, a plurality of display systems comprising a plurality of display means each connected to each buffer memory and displaying with scanning lines corresponding to the different rates, and controlling writing or reading of character data to and from the plurality of buffer memories. An X-ray image processing apparatus comprising: an image display unit provided with a control means;