JPH064634A - Still picture reproducing device - Google Patents

Abstract

PURPOSE:To smoothly process a screen effect at the time of transferring partial compression picture data in a still picture reproducing device. CONSTITUTION:A control host processor 2, a picture processor 5, a screen effect processor 6 and an I/O controller 12 are connected to a main bus 1 so as to make the I/O controller 12 to the bus master of the main bus 1 and a picture extension coprocessor 7 connected to I/O transfers partial compression picture data inputted from the I/O controller 12 to a transfer buffer memory 8. Then, the I/O controller 12 as the bus master issues a control command transferring picture data of a transfer buffer memory 8 to the specified area of a picture memory 4 and at the time of transferring picture data, a control host processor 2 issues the control command to the screen effect processor 6 at an optional time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a still image file system or a general image file system which requires processing of a still image or image processing for switching images and displaying the processing result at the same time. The present invention relates to a still image reproducing device applicable to an image device.

[0002]

2. Description of the Related Art Conventionally, as this type of still picture reproducing apparatus, for example, there is the one shown in FIG. 2, and this still picture reproducing apparatus controls and manages the entire apparatus via a main bus 1. 2, an I / O controller 3 that controls input / output and transfer of image data, an image memory 4 that is a transfer destination of the image data, and a predetermined process (including data transfer) of the image data of the image memory 4 An image processing processor 5, a screen effect processor 6 that switches the processed images (controls screen switching), and an image expansion coprocessor that expands and transfers compressed image data from the I / O controller 3 to a predetermined image memory. (Hereinafter referred to as a coprocessor) 7, a transfer buffer memory 8 used when transferring partial image data (or partial compressed image data), and the above-mentioned screen effect process. And a screen effect means 9 for changing screen Wori image by the image data read out from the image memory 4 by a control signal from the sub 6.

Further, in this still image reproducing apparatus, each sub-processor of the I / O controller 3, the image processing processor 6 and the co-processor 7 is constituted as a slave processor, and the input / output of image data and the input image are carried out. The control host processor 2 issues a command for the predetermined processing and the switching or display of the processed image, and each sub-processor executes the predetermined processing by this command. Aligned transfer of image data to the transfer buffer memory 8 and transfer from the buffer area to the designated area of the image memory 4 are executed.

Therefore, the screen effect processor 6 and the screen effect means 9 are connected by the first local bus 10, and the image memory 4, the image processor 5, the coprocessor 7 and the transfer buffer memory 8 are connected by the second local bus. Connected at 11. The processor 7 is connected to the I / O controller 3.

In the still image reproducing apparatus having the above-mentioned structure, the I / O controller 3 is controlled by the image processing processor 5 by the control command from the control host processor 2, for example.
Input image data from the I / O controller 3 is transferred to the image memory 4 by the coprocessor 7. The input compressed image data from the I / O controller 3 is expanded and transferred to the image memory 4. The image data transferred to the image memory 4 is subjected to predetermined processing by the image processing processor 5 and read out, and the screen effect means 9 controls the screen effect means 9.

When the above screen is partially processed,
The partial image data is transferred to the transfer buffer memory 8 by the image processor 5, or the partial compressed image data is expanded and transferred to the transfer buffer memory 8 by the coprocessor 7. The partial image data and the partial compressed image data may be input from a device connected to the I / O controller 3.

After transferring the image data to the transfer buffer memory 8, the image data is transferred to a designated area of the image memory 4, and the image data of the image memory 4 is read out to the screen effect means 9. On the other hand, the screen effect processor 9 controls the screen effect means 9 to switch the screen according to the image data read from the image memory 4.

As described above, the input image data (or the input compressed image data) is processed variously, and the partial image data (the partial compressed image data) is also processed variously, and the screen according to the processed image data is arbitrarily switched. be able to.

By the way, when the control host processor 2 notifies each sub-processor of the I / O controller 3, the image processing processor 5, and the screen effect processor 6 of a predetermined processing unit (control command) and executes the predetermined processing, the same control is performed. The control command is sequentially issued according to the time management of the host processor 2, or the control command is sequentially issued to each sub-processor after waiting for the end information from the sub-processor which issued the control command by the handshake method.

[0010]

However, in the still picture reproducing apparatus, the partial compressed image data is decompressed and transferred to the transfer buffer memory 8, aligned and transferred, and the image is transferred from the transfer buffer memory 8. When transferring to a designated area of the memory 4, the former is executed by the I / O controller and the coprocessor 7 and the latter is executed by the image processor 5, and two sub-processors of the I / O controller 3 and the image processor 5 are executed. Since the control host processor 2 intervenes during this process, the control of the screen effect processor 6 by the control host processor 2 is restricted during this period, so that a smooth screen effect can be obtained. There was a drawback that you couldn't.

The present invention has been made in view of the above problems, and an object thereof is to control a screen effect processor by intervening a control host processor even when a partial compressed image transfer is executed across two sub-processors. It is an object of the present invention to provide a still image reproducing device capable of eliminating the limitation and realizing a smooth screen effect.

[0012]

In order to achieve the above object, the present invention provides a control host processor for controlling the whole image through a main bus for performing at least image processing and switching of a plurality of images, and an image processing apparatus. I / O controller for controlling input / output, image processing processor for processing data in image memory, screen effect processor for switching display screen of the processed image, image expansion for expanding input compressed image data and transferring to image memory A still image reproducing apparatus comprising a coprocessor, the control host processor as a master processor, and at least a sub processor of the image processing processor and the screen effect processor as a slave processor, wherein at least partial image data or partially compressed image data is Transfer to specified area of image memory A transfer buffer memory for controlling the image data transfer from the control host processor to the I / O controller as a bus master of the main bus, and the I / O controller to process the partial image data. After the transfer to the transfer buffer memory, the I / O controller issues a control command for transferring the image data of the transfer buffer memory to the designated area of the image memory to the image processing processor, and the control command is sent without intervention of the control host processor. The gist is that the image data in the transfer buffer memory can be transferred to a specified area of the image memory, and the control command of the screen effect processor is issued by the control host processor during the transfer of the image data.

[0013]

In the still picture reproducing apparatus having the above construction, when the control host processor issues, for example, a basic control command for transferring the partially compressed image data, the partially compressed image data from the I / O controller is transferred to the image decompression coprocessor. Are expanded and transferred to the transfer buffer memory.

After the transfer of the image data to the transfer buffer memory is completed, the image processing processor transfers the image data of the transfer buffer memory to a designated area of the image memory, and the transfer control command is I of the bus master. Issued from the / O controller.

Therefore, while the image data in the transfer buffer memory is being transferred to the designated area of the image memory, the control host command can issue the control command of the screen effect processor. Since it can be managed and controlled, a smooth screen effect can be obtained.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A still image reproducing apparatus of the present invention connects a control host processor, an I / O controller, an image processing processor and a screen effect processor for controlling the whole to a main bus, and the control host processor controls, for example, partial image data ( When transferring partially compressed image data)
The image processing processor that enables the O controller to become a bus master of the main bus, expands and transfers the partially compressed image data to the transfer buffer memory by the processing of the I / O controller, and then transfers the transfer data to the designated area of the image memory. The processing is performed by a control command from the I / O controller so that the intervention of the control host processor is eliminated.

Therefore, this still picture reproducing apparatus has the structure shown in FIG. In the figure, the same parts as those in FIG.

In FIG. 1, reference numeral 12 is an I / O controller (quasi-slave processor) which becomes a bus master of the main bus 1. As a result, the I / O controller 12 is connected to the main bus 1. It should be noted that the main bus 1 has the control host processor of the master processor,
The image processor 5 and the screen effect processor 6 of the slave processor are connected.

As in the conventional case, the first local bus 1
A screen effect processor 6 and a screen effect means 9 are connected to 0, and an image memory 4, an image processing processor 5, an image expansion coprocessor (hereinafter referred to as a coprocessor) 7 and a transfer buffer memory are connected to the second local bus 11. 8 is connected.

According to the still image reproducing apparatus having the above structure, the slave processor of the image processing processor 5 and the screen effect processor 6 under the control host processor 2 and the I / O controller 12 capable of becoming the bus master of the main bus 1.
And are connected by the main bus 1.

The screen effect processor 6 controls the screen effect means 9 via the first local bus 10 to control screen switching, and the second local bus 11 controls the I / O controller 12. A transfer path for transferring image data from the image device connected to the image memory 4 to the image memory 4, and a transfer path for decompressing and transferring the compressed image data from the I / O controller 12 to the image memory 4. .

For example, when the input image data is partial image data of the display screen or partial compressed image data,
By the basic control command from the control host processor 2, the partial image data (partial compressed image data) is transferred to the transfer buffer memory 8 via the transfer path. In the case of the transfer of the partially compressed image data, the I / O controller 12 reads the partially compressed data from the image device, and the coprocessor 7 reads the partially compressed image data and transfers the partially compressed image data.
The data is decompressed, transferred, and aligned.

After the transfer is completed, it is necessary to transfer the image data in the transfer buffer memory 8 to a designated area of the image memory 4. This transfer is executed by the image processor 5, but the I / O controller 12 is used. Issues a control command for the image processor 5.

That is, the I / O controller 12 receives a control command from the control host processor 2, that is, an instruction to transfer the partial compressed image data and an instruction to switch the screen, and after the transfer to the transfer buffer memory 8 is completed, the main bus. This is because it becomes the 1st bus master. In this case, after the transfer of the image data to the transfer buffer memory 8 is completed, the I / O controller 12 transfers the image data of the transfer buffer memory 8 to the image memory 4 based on the received basic control command. Is output to the image processing processor 5 as it is, and the image processing processor 5 only needs to be able to receive the control command from the I / O controller 12.

In this way, when transferring the partially compressed image data, after decompressing the transfer buffer memory 8 and transferring the image data of the transfer buffer memory 8 to the designated area of the image memory 4, the control host The control command for controlling the transfer of the same image data does not have to be issued from the processor 2.

Therefore, when the transfer of the partial compressed image data is carried out across two sub-processors, that is, the partial compressed image data is transferred to the transfer buffer memory 8.
When the image data of the transfer buffer memory 8 is transferred to the designated area of the image memory 4, the control host processor 2 does not issue an intermediate control command to the image processing processor 5, The transfer can be performed, and the control command of the screen effect processor 6 can be issued by the control host processor 2 at an arbitrary time, whereby smooth screen effect processing can be executed.

When the input image data (or the compressed image data) from the I / O controller 12 is transferred to the image memory 4 and the image data in the image memory 4 is subjected to a predetermined process, the control host processor is operated as in the conventional case. A control command from the controller 2 is issued, and the control command causes the image processing processor 5 and the I / O controller 12 to operate as a slave processor.

[0028]

As described above, according to the present invention, the control host processor, the image processor, the screen effect processor and the I / O controller for controlling the whole are connected to the main bus, and the I / O controller is connected. The input image data (or compressed image data) from is transferred to the image memory, the transfer image data is subjected to predetermined processing, and the partial image data (partial compressed image data) is transferred to the transfer buffer memory, and then the transfer image is transferred. In a still image reproducing apparatus having a screen effect that enables data to be transferred to a designated area of the image memory and switches the screen according to the image data of the image memory, the I / O controller is mainly used when transferring the partially compressed image data. As the bus master of the bus, decompress the partially compressed image data and transfer it to the transfer buffer memory. Thereafter, the I / O controller of the same bus mass issues a control command for transferring the image data of the transfer buffer memory to the designated area of the image memory to the image processing processor, during which the control host processor controls the screen effect processor. Since the command is issued, the above partial image transfer
When the control host processor does not issue an intermediate control command to the two sub-processors of the I / O controller and the image processing processor, the image transfer can be performed. The control host processor can issue a control command at any time to the screen effect processor, which is another sub-processor, so that the screen effect can be smoothly processed.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of a still image reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic block diagram of a still image reproducing device.

[Explanation of symbols]

1 Main Bus 2 Control Host Processor (Master Processor) 4 Image Memory 5 Image Processor (Slave Processor) 6 Image Effect Processor (Slave Processor) 7 Image Decompression Coprocessor (Coprocessor) 8 Image Transfer Buffer Memory 9 Screen Effect Means 10th 1 local bus 11 2nd local bus 12 I / O controller (quasi-slave processor; bus master)

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location H04N 1/21 9070-5C

Claims (1)

[Claims] 1. A control host processor for controlling the whole image through a main bus, an I / O controller for controlling image input / output, and image memory data for performing at least image processing and switching of a plurality of images. An image processing processor for processing, a screen effect processor for switching the display screen of the processed image, an image expansion coprocessor for expanding input compressed image data and transferring the image data to an image memory, and the control host processor as a master processor, at least A still image reproducing device using the image processing processor and a sub processor of the screen effect processor as a slave processor, comprising a transfer buffer memory for transferring at least partial image data or partially compressed image data to a designated area of the image memory. , The control host pro The basic control commands of the image data transfer from the support, the I / O controller and a bus master of the main bus, the I /
After the partial image data is transferred to the transfer buffer memory by the processing of the O controller, a control command for transferring the image data of the transfer buffer memory to the designated area of the image memory by the I / O controller is sent to the image processing processor. And makes it possible to transfer the image data of the transfer buffer memory to a designated area of the image memory without the intervention of the control host processor, and during the transfer of the image data, the control command of the screen effect processor is transmitted by the control host processor. A still image reproducing device characterized by being emitted.