KR100498513B1 - Variable-depth image format for a wireless internet and method for loading and outputting an image thereof - Google Patents

Abstract

The present invention relates to a graphic file format for wireless Internet, which has a lot of resource constraints. The present invention relates to changing the number of bits per pixel according to the number of colors used in an image, thereby making it easy to decode and output images quickly. It offers VDI (Variable-Depth Image) format for reducing data size and efficiently processing data in images. In the VDI format for the wireless Internet of the present invention, the data of each image block that divides the original image into blocks of a predetermined size is an image type each defined according to the total number of colors used in each image block, and each of the image blocks Image width, image height of each image block, hot spot X coordinate of image of each image block, hot spot Y coordinate of image of each image block, local palette table of each image block, each image According to the image type of the block, the number of bits allocated to a pixel in each image block includes different image data.

Description

VIDABLE-DEPTH IMAGE FORMAT FOR A WIRELESS INTERNET AND METHOD FOR LOADING AND OUTPUTTING AN IMAGE THEREOF}

The present invention relates to a VDI format for wireless Internet and a method of loading and outputting an image thereof, and more particularly, to a VDI format for wireless internet and a loading and outputting of an image in which the number of bits allocated per pixel varies according to the number of colors included in the image. It is about a method.

Due to the explosive growth and use of the Internet, the use of the Internet has become commonplace in general offices and homes. Recently, mobile communication terminals such as mobile phones, PDAs (Personal Digital Assistance) and handheld PCs (hereinafter referred to as "mobile terminals"). Wireless internet technology is increasing rapidly. Domestic wireless Internet communication is based on the Code-Division Multiple Access (CDMA) method, which is one of wireless telephone transmission and reception technologies.

On the other hand, as the wireless Internet technology has advanced, mobile terminals have been able to exchange multimedia contents such as graphics, photos, music, video clips, and games in addition to basic voice and text transmission and reception functions. It is attracting much attention as a main terminal of a communication environment.

The wireless Internet communication environment described above has a limitation of overcoming the weakness of the wireless infrastructure and the requirements to be secured as a mobile terminal. In other words, the mobile terminal has limitations such as CPU and OS performance limitations, memory capacity limitations, power consumption limitations, display screen limitations, and input method limitations. Wireless networks also have limitations such as small bandwidth, greater signal arrival time, lower connection stability, and higher cost.

Therefore, in order to overcome the above limitation, in recent years, the flexibility of allowing terminals of different manufacturers to use all the services on one network, and the amount of services suitable for the characteristics and characteristics of the wireless network are provided in a given network environment. Efficiency to provide as many users as possible, reliability to provide a reliable service and reliability to provide a reliable platform, and to protect users and services from security problems even on an open wireless network. Much research has been done to satisfy such issues as safety.

In particular, with the explosive growth of the wireless Internet service market, interest in virtual machine (VM), which is an execution platform, is increasing, and development competition is accelerating, especially among mobile communication companies. This VM method has emerged as an alternative to overcome the shortcomings of the existing WAP method which is slow in service, high in communication cost, and relatively unstable. It is divided into Java and C classes according to the development programming language. For example, there are E-Java and XVM. For C, there are GVM and mobile map MAP.

The main object of the present invention is to provide a new image format for the wireless Internet to maximize the transmission and utilization of multimedia content including the image in the mobile terminal of the wireless Internet environment in consideration of the limitations of the wireless network and the mobile terminal described above.

It is also an object of the present invention to provide a mobile terminal-specific image format based on the GVM (General Virtual Machine) system.

In addition, the object of the present invention is that the image data is not compressed, the decoding is easy, the output speed of the image is fast, the number of bits per pixel according to the number of colors included in the image to reduce the data size of the entire image and effectively process the data of the image The present invention provides a method of loading and outputting a VDI format image for the wireless Internet.

In addition, the purpose of the present invention is to include a flicker and transparent color in the master palette to effectively support the special effects often used in graphic files flicker and sprites to reduce the programming burden of the developer and the processing burden of the mobile terminal To provide a VDI format and a method of loading and outputting the image.

In the VDI format for the wireless Internet of the present invention for achieving the above object, the data of each image block that divided the original image into blocks of a predetermined size, the image is respectively defined according to the total number of colors used in each image block type; An image width of each image block; An image height of each image block; A hot spot X coordinate of the image of each image block; A hot spot Y coordinate of the image of each image block; A local palette table of each image block; And image data having a different number of bits allocated to pixels in each image block according to the image type of each image block.

The present invention described above is also achieved by a computer readable recording medium which records data having a VDI format for wireless internet.

In the present invention, the VDI format may further include information about whether to use transparent colors in the image and information about the number of colors actually used in the image for use when the image type is true color.

In the present invention, the image data includes data substituted with a color value of a corresponding master palette through a local palette table configured with information on a master palette index.

In the present invention, the master palette is a 4-greyscale master palette consisting of 16 color values including white, black, light gray, dark gray, transparent, and flashing color, and 128 basic colors and 1 transparent color and 53 It contains a 256-color master palette of 182 color values, including 1 blinking color. And if the image type is True Color, the master palette is configured to reference the existing 24Bit RGB (Red, Green, Blue) color system.

In the present invention, the VDI format is preferably used as an image format of GVM content based on a general virtual machine (GVM) system.

In addition, the method for loading and outputting the VDI format image for the wireless Internet to the mobile terminal according to the present invention, (a) using an image conversion tool image type, image width, image height, hot spot X coordinate of the image, hot of the image Preparing an image file in a VDI format consisting of a spot Y coordinate, a local palette table, and image data; (b) storing the VDI format image file in a GVM server; And (c) loading data of a VDI format stored in the GVM server into a mobile terminal memory, translating it through the GVM, and displaying the data on the screen of the mobile terminal through a display driver.

In the present invention, the step (a) of preparing an image file in the VDI format includes: (a1) dividing an original image into image blocks having a predetermined size; (a2) defines an image type of each image block according to the total number of colors used in each image block; (a3) identifying the width of the image of each image block, the height of the image, the hot spot X coordinate of the image, and the hot spot Y coordinate of the image; According to the image type of each image block, the color value of each pixel in each image block is sequentially converted to a color value of a pre-prepared master palette and stored in a horizontal bitmap manner.

In the present invention, step (a4) is a 4-grayscale master palette consisting of 16 color values including white, black, light gray, dark gray, transparent, and flashing color, and 128 basic colors and one transparent color. This is done via a master palette consisting of a 256-color master palette of 182 color values including 53 flashing colors.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing the structure of a VDI format according to an embodiment of the present invention, Figure 2 is a view showing a modification to the structure of the VDI format of FIG.

As shown in Fig. 1, the VDI format of the present invention has an image type and a data structure composed of image width, height, hot spot X coordinate, hot spot Y coordinate, local palette table, and image data. As shown in Fig. 1, the image type, image width, height, hot spot X coordinate, and hot spot Y coordinate each have a size of 1 byte, and the local palette table and image data are appropriately variable according to the number of colors and sizes of the image. Has a size.

FIG. 2 additionally includes information on whether to use transparent color in the image and information on the number of colors actually used in the image when the image is true color.

Table 1 below shows the image type of the VDI format.

Referring to Table 1, the color mobile terminal can use all the image types of the VDI format of COLOR1, COLOR2, COLOR4, and COLOR8, but it is possible to set an appropriate image type for each image depending on how many colors each image uses. Therefore, if the number of colors included in the image is small, the number of bits per pixel is reduced, thereby reducing the overall data size of the image. For example, in the case of a semi-multimedia application, the size of image data, which occupies 70 to 80% of the total capacity, can be reduced.

As described above, the present invention provides information on whether transparent color to be used in an image in a VDI format data structure and a palette used in an image in a VDI format data structure according to the size or capacity of the image so that the image is true color. Information about numbers may be included as appropriate.

3 is a diagram illustrating a process of processing data in a VDI format according to an embodiment of the present invention.

As shown in FIG. 3, the VDI format according to the present invention uses colors predefined in the master palette. Two master palettes are provided: four grayscale master palettes and 256 color master palettes (see FIGS. 6 and 7A-7D).

The four grayscale master palettes described above are 16 in total, including four colors that can be actually expressed (white, black, light gray, dark gray), including transparent and blink colors for transparency. Provide color values.

The color master palette is called a 256-color master palette because it uses 8 bits to represent one color value. However, the basic colors that can be expressed are 128 (3-2-2 format), and there are only 182 color values including one transparent color and 53 flashing colors. Therefore, you can have a value from 0 to 255 in the palette, but be aware that specifying a value other than 0 to 181 will result in undefined colors.

Referring back to FIG. 1, in the VDI format data structure, the sixth byte corresponding to the predetermined size is a local palette used in each image (in FIG. 2, the eighth byte corresponds to the predetermined size). Consists of information about the master palette index of the color used by. This configuration is for ensuring that the image data converted to the VDI format and the information of the master palette correspond appropriately when the number of colors used in the image is small.

On the other hand, in the above-described local palette, since the image data of the VDI format directly correspond to the color value of the master palette one-to-one, as in the case of the image type GRAY4 or COLOR8, for example, the sixth byte is viewed structurally without information on the local palette. To describe the image data directly (see Table 1 and FIG. 3).

The VDI format of the present invention stores an image in a horizontal orient bitmap scheme that is most easily decoded. That is, after storing from the top row to the left to the right, the next row is stored. Each row is byte aligned. For example, a VDI format image with a width of 15 in the GRAY2 format requires 2 * 15, or 30 bits, to store one row because each pixel consists of 2 bits. Each time, the last two bits are left blank.

4 is a view for explaining a hotspot (Hotspot) of the VDI format according to an embodiment of the present invention.

As shown in Fig. 4, the VDI format according to the present invention is designed to add hot spot coordinates to its data. That is, in FIGS. 1 and 2, the fourth and fifth bytes represent the x coordinate and the y coordinate of the hot spot. By using hot spot coordinates, an image may be output based on an arbitrary position rather than the upper left of the image. In addition, as shown in FIG. 4, when the VDI format according to the present invention is used, animations having different heights may be easily implemented at the same coordinates by using hot spots.

Next, an example of changing a ring image to a VDI format will be described with reference to FIGS. 5A and 5B. FIG. 5A illustrates a ring image, and FIG. 5B illustrates image data obtained by converting the ring image of FIG. 5A into a VDI format.

5A and 5B, as shown in Table 2 below, the image type of the ring image is COLOR2, and the width 21, the height 21, and the hot spot coordinates are (10, 10). In addition, since the image type is COLOR2, the size of the local palette is 4 bytes, and the subsequent data is the actual image data.

On the other hand, in the VDI format according to an embodiment of the present invention, for example, in the case of an image having five colors used, GRAY4 should be selected as the image type. However, if the image type is arbitrarily selected as GRAY2, the image master chooses four of the five colors (the priority of the palette), and the fifth color automatically replaces the highest color among the four colors. For example, if you use three colors of light gray, black, and transparent in an image block, and you select GRAY2 as the image type, the light gray and black are selected in the palette and the transparent color is replaced by the light gray in the palette.

FIG. 6 is a diagram for describing a 4-grayscale master palette of a VDI format according to an embodiment of the present invention. FIG.

As shown in FIG. 6, the 4-grayscale master palette is composed of four base colors, one transparent color, and eleven blinking colors. Among these 16 colors, image type GRAY1 uses 2 colors, GRAY2 uses 4 colors, and GRAY4 uses 16 colors. In FIG. 6, "Trans." Is an abbreviation of Transparent and is used to show the picture below, and "Prop." Is an abbreviation of Property and means a color appearing by timeout on the LCD. .

7A to 7D are diagrams for describing a 256-color master palette of a VDI format according to an embodiment of the present invention.

As shown in Figs. 7A to 7D, the 256-color master palette is composed of 128 primary colors, one transparent color, and 53 flashing colors, and is not compatible with the Gray Palette. Of the 182 colors in this 256-color master palette, the image type COLOR1 uses two colors, COLOR2 uses four colors, COLOR4 uses 16 colors, and COLOR8 uses 182 colors.

8 is a block diagram illustrating an overview of a system associated with a VDI format image in accordance with one embodiment of the present invention.

The VDI format according to the present invention is an advanced form of image format generated from an image in an existing bitmap format. FIG. 8 schematically illustrates the generation of the VDI format image 3 via the ImageMaster 2, which is one of the image conversion tools, upload / download to the GVM server 4, and execution in the mobile terminal 5. In FIG. Shows. In this case, the GVM server 4 represents a separate GVM server connected to a GVM system connected to a wired / wireless public telecommunication network equipped with a GVM protocol and a file system for uploading and downloading the VDI format from the mobile terminal 5.

Of course, the VDI format of the present invention can be directly executed between mobile terminals equipped with a GVM server function according to the high functionality of the mobile terminal in addition to the execution of the mobile terminal using the separate GVM server described above.

9 is a block diagram illustrating generation of a VDI format image according to an embodiment of the present invention.

As shown in Fig. 9, the original image 1 in bitmap format is converted into VDI format-related files 8, 9, and 10 using the image master 2. The generated file includes a block definition file 8 defining blocks in the image, a VDI format image file 9 in the form of a text file for two different uses, and a VDI format image block file 10 in the form of a binary file.

10 is a block diagram illustrating an example of a method of uploading and downloading a VDI format image according to an embodiment of the present invention.

As shown in Fig. 10, the VDI format image file 9 is inserted into the Mobile C original code 13, and then the GVM object file 15 is generated by the Mobile C compiler 14. The GVM object file 15 may be uploaded to the GVM download server 17 via an online / offline method. This series of tasks is performed by the content provider (CP). The uploaded GVM object file 15 is downloaded to the mobile terminal 5 via an online / offline scheme.

11 is a block diagram illustrating a method of uploading and downloading a VDI format image according to an embodiment of the present invention. 11 illustrates a case where a GVM application executed in the mobile terminal 5 uses the VDI format image block file 10 by accessing the GVM connection server 22 in real time.

Referring to FIG. 11, the VDI format image block file 10 may first be uploaded 21 to the GVM connection server 22 in an online / offline manner, and at this time, the GVM connection server 22 may be connected to the mobile terminal 5. The server program that handles the request is loaded and this series of work is performed by the CP.

In addition, in order to dynamically use the VDI format image when the GVM application is executed in the mobile terminal 5, the LoadMedia function, which is a function already implemented in the GVM module, is called (23) and connected to the GVM connection server 22. The VDI format image block data may be downloaded 24 to the mobile terminal 5 in an online manner.

12 is a block diagram illustrating loading of a mobile terminal of a VDI format image according to an embodiment of the present invention. 12 illustrates a method in which a VDI format image is loaded into a memory unit of the mobile terminal 26 equipped with a GVM module when downloaded to the mobile terminal in the manner of FIG. 10.

Referring to FIG. 12, the GVM object file is loaded into the NV-SSB area 27 of the flash ROM area of the mobile terminal 26 after downloading. In this case, the inserted VDI format image 29 is located in a media pool in the GVM application 28. If the GVM object execution is then required, the VDI format image 29 is loaded in the SSB region 30 in the mobile terminal 26 memory, such as the GVM application 28.

FIG. 13 is a block diagram illustrating loading of a mobile terminal of a VDI format image block according to an embodiment of the present invention. FIG. FIG. 13 illustrates a method in which a VDI format image block is loaded into a memory of the mobile terminal 26 equipped with a GVM module when downloaded to the mobile terminal 31 in the manner of FIG. 11.

Referring to FIG. 13, the GVM-mounted mobile terminal 26 accesses the GVM connection server 33 through a load media function call 32 implemented in a built-in library, and then connects to a GVM server in the server. The stored VDI format image block file 34 is read 35 and downloaded 35 into the WorkSpace 36 area of the terminal 26 via an online method.

14 is a block diagram illustrating output of a mobile terminal of a VDI format image according to an embodiment of the present invention. 14 illustrates a method of outputting the VDI format image 38 to the LCD 50 in the mobile terminal 26 equipped with the GVM.

Referring to FIG. 14, the VDI format image 38 stored in the SSB area in the mobile terminal 26 is moved to the virtual LCD buffer 40 through the DrawXXX function call 39 in the built-in library, and flushed. The function call 41 is moved to the LCD buffer 42 and output to the LCD 50.

15 is a block diagram illustrating output of a mobile terminal of a VDI format image block according to an embodiment of the present invention. 15 illustrates a method of outputting the VDI format image block 45 to the LCD 50 in the mobile terminal 26 equipped with the GVM.

Referring to FIG. 15, the VDI format image 45 stored in the WorkSpace area in the mobile terminal 26 is moved to the virtual LCD butter 47 through the DrawXXX function call 46 in the built-in library. It is moved to the LCD buffer 49 through the flush function call 48 and output to the LCD 50.

As described above, the present invention provides a new image format for the wireless Internet to maximize the transmission and utilization of multimedia content including the image in the mobile terminal of the wireless Internet environment in consideration of the limitations of the wireless network and the mobile terminal.

In addition, the present invention provides a mobile terminal-specific image format based on the GVM system having a data structure of the VDI format.

In addition, the present invention uses the VDI format image, the image data is not compressed, easy to decode and the output speed of the image, the number of bits per pixel according to the number of colors included in the image to reduce the data size of the entire image and the image Can effectively process data

In addition, the present invention can reduce the programming burden and the processing burden of the mobile terminal by including flickering and transparent colors in the master palette to effectively support flickering and sprites that are often used in graphic files by using the VDI format. .

1 is a diagram showing the structure of a VDI format according to an embodiment of the present invention;

2 is a view showing a modification to the structure of the VDI format of FIG.

3 is a view for explaining a process of processing image data in a VDI format according to an embodiment of the present invention;

4 is a view for explaining a hotspot (Hotspot) included in the VDI format according to an embodiment of the present invention,

5A and 5B are diagrams for describing VDI format image data according to an embodiment of the present invention;

6 is a view for explaining a 4-grayscale master palette of the VDI format according to an embodiment of the present invention;

7A to 7D are diagrams for explaining a 256-color master palette of a VDI format according to an embodiment of the present invention;

8 is a block diagram illustrating an overview of a system associated with a VDI format image in accordance with one embodiment of the present invention;

9 is a block diagram illustrating generation of a VDI format image according to an embodiment of the present invention;

10 is a block diagram illustrating a method of uploading and downloading a VDI format image according to an embodiment of the present invention;

11 is a block diagram illustrating a method of uploading and downloading a VDI format image block according to an embodiment of the present invention;

12 is a block diagram illustrating loading of a mobile terminal of a VDI format image according to an embodiment of the present invention;

FIG. 13 is a block diagram illustrating loading of a mobile terminal of a VDI format image block according to an embodiment of the present invention; FIG.

14 is a block diagram illustrating output of a mobile terminal of a VDI format image according to an embodiment of the present invention;

FIG. 15 is a block diagram illustrating output of a mobile terminal of a VDI format image block according to an embodiment of the present invention. FIG.

Claims (9)

The data of each image block, dividing the original image into blocks of a predetermined size, An image type each defined according to the total number of colors used in each image block; An image width of each image block; An image height of each image block; A hot spot X coordinate of the image of each image block; A hot spot Y coordinate of the image of each image block; A local palette table for each image block; And image data having a different number of bits allocated to a pixel in each image block according to the image type of each image block. 2. The computer-readable recording medium having recorded therein data having a VDI format for a wireless Internet. The method of claim 1, Computer-readable recording data having a VDI format for wireless Internet, characterized in that it further has information about the use of the transparent color in the image and the number of colors actually used in the image for use when the image type is true color Possible recording medium. The method of claim 1, And the image data is data substituted with a color value of a corresponding master palette through a local palette table configured with information on a master palette index. The method of claim 3, The master palette is a 4-grayscale master palette with 16 color values including white, black, light gray, dark gray, transparent, and flashing colors, and 128 basic colors and 1 transparent and 53 flashing colors. A computer-readable recording medium for recording data having a VDI format for wireless Internet, comprising a 256-color master palette of 182 color values. The method of claim 1, The VDI format is a computer-readable recording medium for recording data having a VDI format for the wireless Internet, characterized in that used as an image format of GVM content based on a GVM (General Virtual Machine) system. delete In the method of loading and outputting the image of the VDI format for the wireless Internet to the mobile terminal, (a) using an image conversion tool, preparing an image file in a VDI format consisting of image type, image width, image height, hot spot X coordinate of the image, hot spot Y coordinate of the image, local palette table, and image data; (b) storing the VDI format image file in a GVM server; (c) translating VDI format data stored in the GVM server through a translator means mounted in the mobile terminal and displaying the VDI format image on the screen of the mobile terminal through a display driver. Loading and discharging method. The method of claim 7, wherein In step (a), (a1) dividing the original image into image blocks of a predetermined size; (a2) defines an image type of each image block according to the total number of colors used in each image block, (a3) checking the width of the image of each image block, the height of the image, the hot spot X coordinate of the image, and the hot spot Y coordinate of the image, According to (a4), the color values of each pixel in each image block are sequentially replaced with color values of a pre-prepared master palette according to the image type of each image block. How to load and print VDI format images for the wireless Internet. The method of claim 8, Step (a4) includes a 4-grayscale master palette consisting of 16 color values including white, black, light gray, dark gray, transparent, and flashing colors; And a master palette consisting of a 256-color master palette consisting of 182 color values including 128 basic colors, one transparent color, and 53 flashing colors.