JPS63197276A - Picture processor - Google Patents

Abstract

PURPOSE:To perform the input of data to a data converting circuit from a system bus at a high speed and at a low cost by using a bus converting circuit which is used to supply the picture data received from the system bus directly to a picture information processing data converting circuit with no intervention of a CPU and a switch. CONSTITUTION:When the picture data supplied from a system bus 4 are processed, a switch 9 is set for selection of the data given from a bus converting circuit 8. Thus the picture data received from the bus 4 are converted into the data accordant with the specifications of an image bus 5 by the circuit 8 and supplied to a data converting circuit 3. In such a way, the picture data given from the bus 4 can be processed and supplied directly to the circuit 3 with no intervention of a CPU. Then data can be processed at a high speed.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to an image processing apparatus having a data processing circuit for processing one image information.

B8 Summary of the Invention The present invention provides an image processing device that is connected to a system bus via a central processing unit and has a data processing circuit that processes image data input from the image bus. A bus conversion circuit that converts and outputs data that conforms to bus specifications, and a switch that selects either data from the image bus or data output by the bus conversion circuit and inputs the selected data to the data processing circuit. By providing this, high-speed processing of image data from the system bus can be achieved at low cost.

C9 Prior Art Figure 2 shows a block diagram of a conventional image processing device.
"I have pU12. CPU II is a host) CPU
On the other hand, the CPU 12 performs processing directly related to image processing, especially controlling the data conversion circuit 13 (described later) or complex processing that cannot be performed by the data conversion circuit 13. Do these two C's
The PUs are connected by a system bus 14.

This device includes a data conversion circuit 13 as a data processing circuit for image information processing. This circuit directly handles image information, and is characterized by being able to process image information faster than the CPU 12. Processing of image data in the data conversion circuit 13 is performed under the control of CT) U12, and data input to the data conversion circuit 13 is performed via an image bus 15 which is a bus for image data.

In addition, %CRT16a and keyboard 16 are used as peripheral devices.
b, an auxiliary storage device 16e, etc. are connected to the system bus 14, and a scanner 17a, printer 17t), etc. are connected to the system bus 14 and the image bus 15.

The data conversion circuit 13 normally takes in image data from the image bus 15 and processes it. That is, when an operator instructs the CPU 11 to input and process image data from, for example, the keyboard 161), the CPU II inputs and processes the image data, for example, from the scanner 17a. Upon startup, it instructs the CPU 12 to start image processing. The activated scanner 17a sends the captured image data to the data conversion circuit 13 via the image bus 15. On the other hand, the CPU 12 controls the data conversion circuit 13 to take in data from the scanner 17a and process it. The processing results are further processed by the CPU 12 or sent to a peripheral device via the system bus 14, such as a printer 17.
b, and is also printed out in the auxiliary storage device 16.
It is stored in c.

D0 Problems to be Solved by the Invention The data conversion circuit 13 and the image bus 15 are provided to process image information at high speed.

As described above, when image data is input from the image bus 15, high-speed processing is certainly possible.

However, when processing image data stored in the auxiliary storage device 16c, for example, since the auxiliary storage device is connected to the system bus 14Ki, the image data is once input to the data conversion circuit 13 through the CPU 12. There must be. Therefore, it takes time to take in the data, and the load on the CPU 12 increases, further reducing the processing speed.

SUMMARY OF THE INVENTION An object of the present invention is to provide an image processing device that solves these problems and allows data input from the system bus side to a data conversion circuit at high speed and at low cost.

E6 Means for Solving Problems In order to solve the above problems, the image processing device of the present invention is connected to a system bus via a CPU, and has a data processing device that processes image data input from the image bus. In an image processing device having a circuit, a bus conversion circuit that converts data from the system bus into data conforming to the specifications of the image bus and outputs the data, and data from the image bus or data output by the bus conversion circuit. The present invention is characterized by further comprising a switch for selecting one of the above and inputting the selected one to the data processing circuit.

When processing image data from the X.29 action system bus, the switch is set to select data from the data processing circuit. As a result, image data from the system bus is converted in the data processing circuit into data that conforms to the specifications of the image bus, and is input to the data processing circuit. In other words, even when processing image data from the system bus, the CPU is not used.

Since data can be directly input to the data processing circuit, high-speed data processing is possible.

G. Example Next, an example of the present invention will be described. FIG. 1 is a block diagram showing this embodiment. C'l'U1 is hos)C
It is a PU and performs processing that is not directly related to image processing, for example, processing related to C'PU2 or peripheral devices, which will be described later. On the other hand, the CPU 2 performs processing directly related to image processing, and in particular controls the data conversion circuit 3 and switch 9, which will be described later, or performs complicated processing that cannot be performed by the data conversion circuit 3. These two CPUs are connected by a system bus 4.

This device is equipped with a data conversion circuit 3 as a data processing circuit for image information processing. This circuit directly handles image information, and is characterized by being able to process image information faster than the central processing unit 2. Processing of image data in the data conversion circuit 3 is performed under the control of the CPU 2, and data input to the data conversion circuit 3 is performed via an image bus 5, which is a bus for image data.

Peripheral devices such as a CRT 6a, a keyboard 6b, and an auxiliary storage device 60 are connected to the system bus 4, and peripheral devices such as a scanner 7a and a printer 7b that input and output image data are connected to the system bus 4 and the image bus 5. ing.

The bus conversion circuit 8 is for absorbing the difference in specifications between the system bus 4 and the image bus 5.

That is, it receives data from the system bus 4, converts it into data with specifications compatible with the image bus 5, and outputs it to the switch 9. The switch 9 transfers data from the image bus 5 or data from the bus conversion circuit 8 to c p
is selected under the control of the controller 2 and output to the data conversion circuit 3.

Next, the operation will be explained. The operator first operates the keyboard 6b to specify to C'PUI whether data is to be input to the data conversion circuit 3 from the image bus 5 side or from the system bus 4 side. The CPUI notifies this designation to the CPU2, and the CPU2 receives this and switches the switch 9.
Set. For example, if data input from the image bus 5 is specified, the switch 9 is set to the image bus 5 side.

Next, when the operator instructs the CPUX to input and process image data from the keyboard 6h, the CPUI starts up, for example, the scanner 7a and instructs the CPU 2 to start image processing. The activated scanner 7a sends the captured image data to the data conversion circuit 3 via the image bus 5. On the other hand, the CPU 2 controls the data conversion circuit 3 to take in data from the scanner 7a and process it. The processing results are further processed by cptyz or sent to a peripheral device via the system bus 4, printed out, for example, by the printer 7b, and stored in the auxiliary storage device 6c.

On the other hand, since the image data stored in the auxiliary storage device 6c is processed by the data conversion circuit 3, if the switch 9 is set to the bus conversion circuit 8 side, the system bus 4
The auxiliary storage device 6c is input to the bus conversion circuit 8 through
The image data from the bus conversion circuit 8 is converted into the specifications of the image bus 5 and then input to the data conversion circuit 3 through the switch 9. In this case, data conversion circuit 3
Generally speaking, the input data is exactly the same as the data on the image bus 5, and therefore, unlike the conventional method, where the data is taken in and processed in the same way as when inputting data from the image bus 5, the image data is Since the data does not pass through the CPU 2, it is taken into the data conversion circuit 3 and processed at high speed, and the load on the CPU 2 does not increase, so the processing speed does not decrease.

Note that in this device, as an example, the switching of the switch 9 is performed by the CPU 2, but it is also possible to configure the device to perform this switching using the CPUI.

Details of the invention As described above, the image processing apparatus of the present invention is as follows.

It is equipped with a bus conversion circuit and a switch for directly inputting image data from a system bus to a data processing circuit for image information processing without going through a CPU.

Therefore, even when processing image data from an auxiliary storage device or the like connected to the system bus, the data can be input directly to the data processing circuit without going through the CPU.

That is, image data from the system bus side can be input to the data processing circuit at high speed and processed, and the load on the CPU is not increased, so its processing capacity is not degraded.

Furthermore, the image processing apparatus of the present invention can be implemented at low cost. In other words, only a bus conversion circuit and a switch are required, and these can be realized with a simple configuration.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a block diagram showing a conventional image processing apparatus. 1.2...CPU, 3...Data conversion circuit, 4...
・System bus, 5... Image bus, 6.7...
Peripheral device, 8... Bus conversion circuit, 9... Switch. Figure 1 1, 2...CPU 3... ・T-'? IT party giant name 4...system 5...--image 6.7...f@i! ! Praise 8...no Vs'R Saip mouth et al. 2 each 9...Suinochi

Claims (1)

[Claims] (1) connected to the system bus via the central processing unit;
In an image processing device having a data processing circuit that processes image data input from an image bus, a bus conversion circuit that converts data from the system bus into data that conforms to the specifications of the image bus and outputs the data, and An image processing apparatus comprising: a switch for selecting either data from a bus or data output from the bus conversion circuit and inputting the selected data to the data processing circuit.