JPS6315328A - Picture information display device - Google Patents

Abstract

PURPOSE:To rapidly perform displaying, by storing at least picture information of three pages in a picture information memory, and switching them order so as to be the picture information of three pages in which one follows on the other, corresponding to the displaying of a display. CONSTITUTION:After the picture information at the n-th number of pages is displayed, and when the displaying of the the next (n+1)-th number of pages of the picture information on the display 7 is designated at a keyboard 9, CPU10 sends the (n+1)-number of pages of the picture information from the memory 4 to a decoding circuit 11. Simultaneously, the CPU10 requests to send the picture information at the (n+2)-th number of pages to an interface 2, based on the fact that n-number of pages centering a displaying (n+1)-th number of pages are stored in the memory 4. The (n+1)-number of picture information sent to the decoding circuit 11, after being decoded, are displayed on the display 7. Meanwhile, if the (n+2)-th number of pages of the picture information is stored in a storage medium, the bit of picture information is taken out. And is transferred to the memory 4. And the (n+2)-number of picture information are switched to the (n-1)-number of picture information, then they are stored in the memory 4.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an image information display device having a memory for temporarily storing image information.

2. Description of the Related Art A conventional image information display device of this type includes a storage medium that stores image information over multiple pages, is connected to this storage medium via an interface, and displays image information stored in the storage medium one page at a time. It is equipped with a memory for inputting and storing image information, and a display section for inputting image information from this memory and displaying it. Normally, the storage medium is accessed page by page, and the image information is transferred page by page through the memory. was displayed on the display.

Problems to be Solved by the Invention Incidentally, when displaying image information, it is often desirable to display the previous and next pages in order to confirm the contents. In such a case, in the conventional image information display device as described above, the storage medium is accessed for each page to be displayed.
Image information of a predetermined page is extracted from a storage medium and displayed on a display unit.

However, such an image information display device has a problem in that it takes time to display the image information of a predetermined page.

This problem arises for the following reasons. That is, in the above-mentioned image information display device, until the image information is displayed, there is an access time Tl of the image information storage medium, a time T2 during which the image information of the storage medium is stored in the memory, and a time T2 when the image information is retrieved from the memory. While this requires a total time including the time T3 until it is displayed on the display unit, the access time T has a particularly large weight (the access time TI is equal to or greater than T2+T3). Because it occupies

The present invention has been made in view of the above problems, and it is an object of the present invention to provide an image information display device that can quickly display at least three pages of image information including the front and rear pages.

Means for Solving the Problems In order to achieve the above object, the present invention includes a storage medium that stores image information covering a plurality of pages, and a storage medium that is connected to the storage medium via an interface so that at least three pages of image information are stored. an image information memory for inputting and displaying the image information in this image information memory, and a display section for inputting and displaying the image information in this image information memory; It is equipped with a CPU as a means for storing image information for two pages, front and rear, in an image information memory.

The CP specifies the image information of a predetermined page to be displayed on the operation display section.
When U receives the request, the CPU retrieves the specified image information from the storage medium via the interface.

Input into image information memory. Furthermore, the image information is transferred to the display unit and displayed there. During this time, the CPU takes out the image information of the previous page and the image information of the next page from the storage medium and stores them in the image information memory. Then, when displaying the image information of the previous page or the next page, either image information is taken out from the image information memory and displayed. During this time, image information is selected from the storage medium by the CPU so as to cover three pages in front and back in the margin of the image information memory.

These are transferred and stored in the image information memory. These operations are performed sequentially.

Embodiment FIG. 1 is a block diagram showing an image information display device according to an embodiment of the present invention.

This image information display device is connected to an optical disk and driver device (hereinafter referred to as a storage medium) 1 that stores image information spanning multiple pages, and to the storage medium 1 via an interface 2 and a CPU bus 3, and displays three pages of image information. It is connected to the memory 4 via an image information memory (hereinafter referred to as "memory 5") 4, a half-image information bus (hereinafter referred to as "bus") 6, and a display interface 6, and displays the image information input from the memory 4. The display 7 is equipped with a display 7 for displaying. This device further includes a keyboard 9 connected to the CPU bus 3 via an interface 8 and into which device operation information is input, and a CPU 10 connected to the CPU bus 3 and controlling each circuit of the device. There is. This CPU 1o transfers image information from the memory 4 to the display 7, and when one page of image information from the memory 4 is transferred to the display 7, the CPU 1o processes images for two pages before and after the transferred image information page. Information is stored in memory 4.

Furthermore, in this device, the CPU 10 reads the CPU from the memory 4.
Encoded image information is transferred to the display 7 via the U-bus 3, and half-image information is transferred to the display 7 via the bus 6. A decoding circuit 11 is provided between the CPU bus 3 and the bus 6, and this decoding circuit 11 decodes encoded information into half-picture information.

The operation of the image information display device configured as described above will be explained with reference to FIGS. 1 and 2. Incidentally, FIG. 2 is a memory map showing the contents stored in the memory 4 at each operation stage of this device.

When the image information of a predetermined page (in this case, the n-th page) to be displayed on the display 7 is specified by operating the keyboard 9, the CPU 10 receives this specification signal and outputs 0.
The PU 10 retrieves n pages of image information from the storage medium 1 via the interface 2. This n page of image information is temporarily stored in the memory 4. This image information is the previous 0PU1
0 is taken out from the memory 4, decoded by the decoding circuit 11, and output to the bus 6. After this, this image information is sent to the display interface 6, where it is reduced to match the resolution of the display 7.

The image is enlarged and displayed on the display 7.

While decoding the image information of the n-th page from the memory 4 and transferring it to the display 7, the CPU 10 requests the interface 2 for the image information of the previous (n-1) page and the image information of the next (n+1) page. If these image information are stored in the storage medium 1, these image information are transferred to the memory 4, and the image information of these (n-1) pages and the image information of (n+1) pages are stored in FIG. ) is stored in the memory 4 as shown in FIG.

At this stage, the image information of the nth page is displayed on the display 7.
This is indicated by an arrow. The arrows in FIGS. 2(B) and 2(C) also indicate the image information being displayed on the display 7 at each stage.

Then, after the image information of the n-th page is displayed on the display 7, when displaying the image information of the next (n+1) page on the display is specified using the keyboard 9, the CPU 10 displays the image information of the next (n+1) page from the memory 4. The image information is sent to the decoding circuit 11 in the same manner as above. Along with this, CPU1
0 indicates that the two pages before and after the displayed (n+1) page are pages n and (n+2), and since page n is stored in the memory 4, it requests the image information of the (n+2) page from the interface 2. do. The image information of the (row 2) page sent to the decoding circuit 11 is decoded here and then displayed on the display 7 in the same manner as described above.

On the other hand, if the (n+2)th page image information is stored in the storage medium, this image information is extracted from there and stored in the memory 4.
will be forwarded to. Then, the image information of the (n+2) page is switched to the image information of the (row 1) page and stored in the memory 4, as shown in FIG. 2(B). Note that at this stage, as described above, the image information of the (n+1) page indicated by the arrow is displayed on the display 7.

Furthermore, when display of the previous page is specified using the keyboard 9, the image information of the previous (row 1) page is displayed on the display 7, and the same procedure as described above is performed in the memory 4 as shown in FIG. 2(C). Then, the image information of the (n-2) page is switched and stored in the storage area of the image information of the (n+1) page.

Thereafter, in the same manner, the image information of the previous and three pages are sequentially switched and stored in the memory 4 in response to the display of the image information on the display 7.

As described in detail, the present invention stores at least three pages worth of picture information in the picture information memory, and sequentially switches the picture information so that it becomes the picture information of the previous and last three pages in response to the display. Therefore, even when displaying the previous page and the next page, there is no need to access the storage medium in which image information for all pages is stored in advance, and the display can be performed quickly.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an image information display device according to an embodiment of the present invention, and FIG. 2 is a memory map of the image information memory of the device. 1... Image information storage medium, 4... Image information memory, 7.
...Display, 1o... (1!PU.

Claims (1)

[Claims] a storage medium that stores image information over a plurality of pages; an image information memory that stores at least three pages of image information on the storage medium; a display section that displays image information retrieved from the image information memory; An image information display comprising means for storing image information for two pages before and after the transferred page in the image information memory when image information for one page of the information memory is transferred to the display section. Device.