JPH0219898A - Image decoding and displaying device - Google Patents

Abstract

PURPOSE:To reduce the processing time of the title device by simultaneously transferring image information to an image contracting device when the image information is transferred from an image decoding device to an image storing device. CONSTITUTION:At the time of contracting image information to display, the image code of an image code storage device 1 is decoded into image information by means of an image decoding device 2 and the decoded image information is transferred to an image storage device 3. When the transfer is made, the image information is transferred to the overlapping address IM' of the 1st buffer of an image contracting device 6 and the storage device 3 in accordance with the address map 15 of the decoding device 2. By overlapping the addresses, it can be considered that the image information is transferred to the 1st buffer of the device 6 simultaneously with the transfer to the storage device 3 from the decoding device 2. Thus the processing time can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to image display, and particularly to an image decoding and display device that displays image information in a reduced size.

[Conventional technology]

Conventionally, this type of image decoding and display device has an image code storage device 31, an image decoding device 32, an image storage device 33, a display image storage device 34, and an image display device 35, as shown in FIG. , an image reduction device 36, a control device 37, and a bus 38.

FIG. 7 shows the configuration of the image reduction device 36.

This image reduction device includes an image reduction section 39, a first buffer 40, a first buffer control section 41, a second buffer 42, and a second buffer control section 43, and is connected to a bus 38.

FIG. 8 shows the configuration of the address decoding section of the image reduction device 36. It is composed of an address decoding section 46 from the image reduction section 39, an address decoding section 47 of the first buffer 40 from the control device 37, and an arbitration section 48.

FIG. 9 shows an address map 49 of a conventional image decoding display device.

The operation of the conventional image decoding and display device will be explained based on FIGS. 6 to 9. When displaying image information in a reduced size, the image decoding device 32 decodes the image code in the image code storage device 31 to generate image information, and transfers it to the image storage device 33.
The image information to be reduced is transferred from 3 to the image reduction device 36, the image information is reduced by the image reduction device 36, the reduced image information is transferred from the image reduction device 36 to the display image storage device 34, and the image information is transferred from the image reduction device 36 to the display image storage device 34. It was displayed on the display device 35.

As can be seen from the address map 49 in FIG. 9, image information is transferred from the image decoding device 32 to the image storage device 33 and then further transferred to the first buffer 40 of the image reduction device 36. Therefore, as shown in FIG. 10, in the conventional data flow, from reading the image code from the image code storage device 31 to displaying it on the image display device 35, '7'l=t, +t
It took 2+j3 time.

[Problem to be solved by the invention]

When the above-mentioned conventional image decoding display device displays image information in a reduced size, it transfers the reduced image information from the image storage device to the image reduction device, and transfers the reduced image information from the image reduction device to the display image storage device. The disadvantage is that the transfer process takes time.

SUMMARY OF THE INVENTION An object of the present invention is to provide an image decoding and display device that can eliminate such conventional drawbacks and shorten processing time.

[Means to solve the problem]

The present invention provides an image code storage device that stores image codes, an image decoding device that decodes the image codes sequentially output from the image code storage device into image information, and a storage device that stores image information transferred from the image decoding device. an image storage device that reduces image information read from the image storage device; a display image storage device that stores the reduced image information; and reduced image information successively output from the display image storage device. An image decoding and display device comprising an image display device for displaying an image, the image decoding and display device having means for simultaneously transferring image information to the image reduction device when transferring image information from the image decoding device to the image storage device. It is characterized by

〔Example〕

FIG. 1 is a block diagram of an embodiment of an image decoding display device of the present invention. The basic configuration of this embodiment is the same as the conventional image decoding and display device shown in FIG.

This image decoding display device is an optical disc (OD:
An image code storage device 1 which is a 0ptical disk, an image decoding device 2 which is a CODEC, and an image memory (T M :Imag).
The image storage device 3 is a frame memory (FM), which is a
) and a cathode ray tube (CRT).
), and a reduction controller (RC).
an image reduction device 6 which is a central processing unit (ler), and a central processing unit (
It is composed of a control device 7 (CPU) and a bus (BUS) 8.

FIG. 2 shows the configuration of the image reduction device 6. As shown in FIG.

The image reduction device includes an image reduction unit 9, a first buffer 10, and a first buffer system? 111 section 11 , a second buffer 12 , and a second buffer control section 13 , and is connected to the lotus 8 .

FIG. 3 shows the configuration of the address decoding section of the image reduction device 6. This address decoding section includes an address decoding section 16 from the image reduction section 9, an address decoding section 17 of the first buffer 10 from the control device 7, and an overlapping portion between the image storage device 3 from the control device 7 and the first buffer 10. Address decoding section 19, duplication selection circuit 2
1, an arbitration section 18.

This address decoding section has a configuration in which an address decoding section 19 and a duplication selection circuit 21 are added to the conventional address decoding section shown in FIG. Decodes the address of the overlapped portion of the device 6 with the first buffer 10, disables the overlap selection when the mode signal to the overlap selection circuit 21 is 1", and enables the overlap selection when the mode signal is "0". .

In the image decoding display device of this embodiment, when reducing and displaying image information, the image code storage device 1
The image code is decoded into image information by the image decoding device 2 and transferred to the image storage device 3. At this time, according to the address map 15 of the image decoding and display device shown in FIG.
(denoted as M').

In the address map 15 of this embodiment, the image record i! Part of the device 3 and the first buffer 10 of the image reduction device 6
Since the addresses are duplicated, when image information is transferred from the image decoding device 2 to the image storage device 3, the image information is also transferred to the first buffer 10 of the image reduction device 6 at the same time.

Address duplication between the image storage device 3 and the first buffer 10 of the image reduction device 6 on the memory map 15 is performed as follows. The address encoder 1-19 decodes the address of the overlapped part between the image storage device 3 and the first buffer 10, invalidates the overlap selection when the mode signal is "1", and disables the overlap selection when the mode signal is "0". Sometimes enable duplicate selection.

According to this embodiment, as is clear from the data flow shown in FIG.
2=t,+t, and the time of TI-T2=t2 is shortened compared to the conventional method.

〔Effect of the invention〕

As explained above, according to the present invention, when transferring image information from an image decoding device to an image storage device,
By simultaneously transferring image information to the image reduction device, processing time can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the image decoding display device of the present invention, FIG. 2 is a block diagram of an image reduction device in the embodiment of FIG. 1, and FIG. 3 is an address decoding diagram of the embodiment of FIG. 1. Fig. 4 is an address map of the image decoding display device shown in Fig. 1, Fig. 5 is a diagram showing the data flow of the image decoding display device shown in Fig. 1, and Fig. 6 is a conventional image decoding display device. 7 is a block diagram of the image reduction device in the conventional image decoding display device shown in FIG. 6; FIG. 8 is a block diagram of the address decoding section in the conventional example shown in FIG. 6; FIG. FIG. 6 is an address map of the conventional image decoding and display device, and FIG. 10 is a diagram showing the data flow of the conventional image decoding and display device of FIG. ■...Image code storage device 2...Image decoding device 3...Image storage device 4...Display image storage device 5...Image display device 6... ... Image reduction device 7 ... Control device 8 ... Bus 9 ... Image reduction section 10 ... First buffer ... First buffer control section 12 ... ...Second bus buffer 3...Second buffer control section 15...Address map 16, 17.19...Address decoding section 18...
・Arbitration unit 21 ・Duplicate selection circuit

Claims (1)

[Claims] (1) An image code storage device that stores image codes, an image decoding device that decodes the image code read from the image code storage device into image information, and stores image information transferred from the image decoding device. an image storage device; an image reduction device that reduces image information read from the image storage device;
An image decoding and display device comprising a display image storage device that stores reduced image information, and an image display device that displays the reduced image information read from the display image storage device, the image decoding device to the image storage device. An image decoding and display device comprising means for simultaneously transferring image information to the image reduction device when transferring the image information to the image reduction device.