JPS62192866A - Image data processor - Google Patents

Abstract

PURPOSE:To transfer image data at a high speed by constituting two buses of an internal bus (general-use bus) and an image exclusive-use internal bus. CONSTITUTION:First, image data inputted from a device 31 for inputting outputting the image composed of an image reader, etc., are transferred through an I/O card 30 and an image exclusive-use bus 21 to a window memory 5. To a hard disk 32 for the image, the data stored at the window memory 5 are still transferred through the image exclusive-use bus 21. Further, even when the data are displayed at a graphic CRT 7, the image data of the window memory 5 are once stored through the image exclusive-use bus 21 to a frame memory 6 under the control of a graphic processor 4, and thereafter, the data are displayed. Thus, since an internal bus 10 is not used for the transfer of the image data, the image data can be transferred at a high speed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image data processing device that transfers image data at high speed.

[Conventional technology]

Image data (binary image) has a joist capacity that is incomparable to vector data and character data created by dividing binary image data. For example, if an A3 size image is stored with a resolution of lff1j+12 dots, the memory capacity will be approximately 4 Mbytes. When transferring such a large amount of data, a method is used to transfer data at high speed by increasing the bit rate of the data bus (32-bit bus).

FIG. 2 is a diagram showing the configuration of, for example, a conventional image data processing device. In the figure, 1 is a main CPU.

2 is a main memory, 3 is an auxiliary storage device (such as an eXts-based disk), and a graphic processor 4, a window memory 5, and an interface card 8 such as an image reader are connected via an internal data bus (general-purpose bus) 10. In addition, 6 is frame memory, γ is graphic C 几T11
1 is an internal bus.

Next, the operation will be explained. First, image data obtained by reading a drawing using an image reader or the like is input to the interface card 8, and stored in the window memory 5 via the internal lotus 10 under the control of the main CPU 1. Then, it is stored in the auxiliary storage device 3 as needed.

In addition, when displaying on the graphic C-box T7, the data stored in the auxiliary storage device 3 is transferred to the window memory 5 through the internal bus 10, and is displayed via the graphic processor 4.

[Problem that the invention seeks to solve]

Since the conventional image data processing device is configured as described above, the internal bus 10 is occupied every time image data is input, stored in memory, or transferred to a CRT. During the data transfer, the main CPU's original functions are marginalized. Further, as a result, there have been problems such as the effective efficiency of the data processing device being significantly reduced.

This invention was made to solve the above-mentioned problems, and an object of the present invention is to provide an image data processing device that does not cause a bus neck in an internal bus that transfers large amounts of data such as image data. .

[Failure to solve the problem]

The image data processing device according to the present invention transfers image data input/output and image disk related data transfer to the management of the graphics processor, and only transmits processing data and control data from the main CPU via the internal bus 10. The image data is transferred to the graphics processor, and the image data is transferred via a dedicated image bus.

[For production]

゛The bus configuration in this invention is an internal bus (general-purpose bus)
By adopting a two-node configuration consisting of an image-only internal bus and an image-only internal bus, high-speed image data transfer is possible.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, the same parts as in FIG. 2 are designated by the same symbols. In FIG.
An image input/output device 31 and an image node disk 32 are connected to the card.

Next, the operation will be explained. First, image data input from an image input/output device 31 such as an image reader is transferred to the window memory 5 via the I10 card 30. Data transfer at this time is of course performed using the image dedicated bus 21. Further, the data stored in the window memory 5 is transferred to the image hard disk 32 via the image dedicated bus 21. Furthermore, when displaying data on the graphic CR, T7, the image data developed in the window memory 5 is once stored in the frame memory 6 via the image dedicated bus 21 under the management of the graphic processor 4, and then Is displayed.

〔Effect of the invention〕

As described above, according to the present invention, all image data is transferred using the image-dedicated bus, and the internal bus of the main processor is configured with two buses so as not to cause a simultaneous bus neck. There is no bus neck at all between the internal bus where data runs and the image dedicated bus where image data runs, and the main CPU can freely use the internal bus, resulting in a highly efficient image data processing device. effective.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an image data processing apparatus showing an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional image data processing apparatus. In the figure, 1 is a main CPU, 4 is a graphic processor, 5 is a window memory, 6 is a frame memory, T is a graphic CRT, 10 is an internal bus, 21 is an image dedicated bus, and 30 is an I10 card. Patent applicant Mitsubishi Electric Corporation Agent Patent attorney 1) Hiroshi Sawa □ (2 others)
' Fig. 1 JZ 1: Earth CPU 4 Kura power/Noah 0t-Fufu 5゛Ishidome ts 6: Freheme t"Noah: 2 Rough Iuno CRT 10: Internal lotus 21: Image exclusive nozzle 30: l10jJ-Do Figure 2

Claims (1)

[Claims] Transfers processing data and control data from the main CPU to the window memory via the general-purpose bus, sends the data stored in the window memory to the frame memory via another internal bus, and displays the data on the graphic CRT. An image data processing device characterized in that the image data processing device has a two-bus configuration in which an internal bus to which data of the main CPU is transferred and an image dedicated bus to which image data is transferred are separated for control purposes.