KR20060042048A - Device and method for displaying data using overlay technique in terminal equipment - Google Patents

Abstract

A device for displaying a multimedia image of a mobile terminal includes a multimedia memory for storing desktop and overlay images, a back buffer for storing the desktop image, an overlay buffer for displaying the overlay images, a screen buffer, and the back. And a control unit for overlaying the image of the overlay buffer on the image of the buffer and storing the overlay buffer image in the screen buffer, outputting the stored screen buffer image to the display screen, and a display unit for displaying the display screen output from the control unit.

Overlay, multimedia, character display

Description

Device and method for overlaying multimedia data on mobile terminal {DEVICE AND METHOD FOR DISPLAYING DATA USING OVERLAY TECHNIQUE IN TERMINAL EQUIPMENT}

1 is a diagram showing the configuration of a portable terminal according to an embodiment of the present invention.

2A-2D illustrate the structure of a character memory in accordance with an embodiment of the invention.

3A-3D show examples of images of characters according to embodiments of the present invention.

4 is a view for explaining the structure of a buffer for displaying display data on a display unit of a mobile terminal according to a first embodiment of the present invention;

5 is a diagram illustrating a procedure for displaying multimedia data according to the first embodiment of the present invention.

6 is a diagram illustrating a procedure for displaying multimedia data according to the first embodiment of the present invention.

FIG. 7 is a diagram showing a detailed procedure of displaying multimedia data in FIG.

FIG. 8 is a diagram illustrating a procedure of changing a display position of an avatar image in FIG. 6.

9 is a diagram illustrating a procedure of changing a size of an avatar image in FIG. 6.

10 is a flowchart illustrating a procedure for displaying multimedia data according to a second embodiment of the present invention.

FIG. 11 is a flow chart illustrating a procedure for processing an input generated by a user in FIG. 10.

FIG. 12 is a flowchart illustrating a procedure of processing data included in an overlay data list in FIG. 10.

FIG. 13 is a flowchart illustrating a procedure of overlay processing data pixels selected in FIG. 12.

FIG. 14 is a flowchart illustrating another procedure of overlaying data pixels selected in FIG. 12.

15 is a view for explaining an operation of displaying a character image on a display screen according to the first embodiment of the present invention;

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data display device and method of a mobile terminal, and more particularly, to an apparatus and method capable of overlaying and displaying data.

In general, a mobile terminal refers to a device that a user can carry, and a typical device is a mobile phone. The mobile phone can service various additional functions in addition to the native phone function. The mobile phones having the above additional functions may be camcorder phones having cameras, TV phones capable of watching TV, MP3 phones capable of listening to MP3 music files, and the like. In other words, current mobile phones are increasing in number of products having additional functions for processing multimedia data.

In addition, a portable terminal having a function of processing the multimedia data generally includes an LCD display unit, and various display methods for displaying the multimedia data are being developed. The portable terminal should be able to display various kinds of data. That is, the portable terminal needs a function capable of displaying multimedia data while simultaneously displaying data for performing a terminal-specific function. Among the multimedia data, there are data to be displayed while moving the display position on the display unit. That is, when an avatar operation is expressed in the mobile terminal, it should be displayed while changing the position of the display unit region according to the operation of the avatar. In such a case, it is preferable to display the operation of the avatar while maintaining display data of the mobile terminal located on the display unit. That is, when displaying the multimedia data, it is preferable to display the multimedia data by overlaying the screen currently displayed on the mobile terminal.

Accordingly, an object of the present invention is to provide an apparatus and method capable of overlaying multimedia data on a screen currently being displayed on a mobile terminal.

Another object of the present invention is to provide an apparatus and a method for displaying multimedia data having a movement in a mobile terminal by overlaying it on a screen of a display unit.

Still another object of the present invention is to provide an apparatus and method for allowing a mobile terminal to blend and display different multimedia data images on an image of a display screen.

It is still another object of the present invention to provide an apparatus and method for inserting multimedia data to be overlaid on an overlay display area of a display screen in an overlay display mode and outputting the display screen data.

Another object of the present invention is to provide an apparatus and a method for a mobile terminal to blend and output multimedia data to be overlayed on an overlay display area of a display screen at a predetermined ratio in the overlay display mode.

It is still another object of the present invention to provide an apparatus and method for overlaying and displaying multimedia data on a screen of a display unit having a screen buffer for storing display data to be displayed on a screen and an overlay buffer for storing multimedia data. In providing.

Another object of the present invention includes a screen buffer for storing display data to be displayed on the screen and an overlay buffer for storing multimedia data, and overlays and displays multimedia data on the screen of the display unit, and the position of the overlay buffer. The present invention provides an apparatus and method for changing the display position of the multimedia data by moving.

Still another object of the present invention is to provide an apparatus and method for allowing a mobile terminal having a character agent function to display character data by overlaying it on a set display position of a background screen.

Still another object of the present invention is to display a character data by overlaying the character data on the display position of the mobile terminal having a character agent function, and blends the background data and the character data at a set ratio when displaying the overlay. It is to provide an apparatus and method that can be.

DETAILED DESCRIPTION A detailed description of preferred embodiments of the present invention will now be described with reference to the accompanying drawings. It should be noted that the same components in the figures represent the same numerals wherever possible.

In an embodiment of the present invention, when multimedia data is displayed on a mobile terminal, the multimedia data is overlaid and displayed on a screen that is currently displayed. In this case, the multimedia data overlay function supports an overlay function not supported on an operating system of the portable terminal. The process of processing the multimedia image data for performing the overfp function is added, and the display function can be variably controlled according to the position, direction, and size change of the multimedia image data. In addition, in the embodiment of the present invention, it is assumed that the multimedia data is character data. In addition, in the embodiment of the present invention, it is assumed that the character data is composed of avatar, avatar house, item, and background data. Here, the avatar is a character that can have a function of expressing emotion according to the use state of the mobile terminal, the avatar house is a character that can be used as data displayed in the standby state of the mobile terminal, and the item and the background screen are the avatar. It can be the characters that make up the house.

1 is a view showing the configuration of a mobile terminal according to an embodiment of the present invention.

Referring to FIG. 1, the wireless communication unit 123 performs a wireless communication function of a portable telephone. The wireless communication unit 123 includes an RF transmitter for upconverting and amplifying a frequency of a transmitted signal, and an RF receiver for low noise amplifying and downconverting a received signal. The data processor 120 includes a transmitter for encoding and modulating the transmitted signal and a receiver for demodulating and decoding the received signal. That is, the data processor 120 may include a modem and a codec.

The key input unit 121 includes keys for inputting numeric and character information and function keys for setting various functions. In addition, the key input unit 127 may include a key for generating a command for performing short-range communication with an external data terminal device according to an exemplary embodiment of the present invention. The memory 130 may include program memory and data memories. The program memory may store programs for controlling the general operation of the portable telephone and programs displaying overlay of character data according to an embodiment of the present invention. The data memory also includes a character memory for storing character data according to an embodiment of the present invention.

The character memory includes a memory for storing a character structure (hereinafter referred to as a character structure memory) and a memory for storing character image data corresponding thereto (hereinafter referred to as a character image memory). Here, the character structure memory stores types of characters, animations, and structures of frames, and the character image memory is a memory storing images of characters.

The controller 110 controls a general operation of the mobile terminal. In addition, the controller 110 may include the data processor 120. Therefore, a microphone and a speaker for processing voice and audio signals may be connected to the controller 110 or may be connected to the data processor 120. The controller 110 displays a character set according to the operation of the mobile terminal according to an embodiment of the present invention, and updates the parameters of the avatar according to the display of the character.

The display unit 140 displays information according to the operation of the mobile terminal under the control of the controller 110, and displays the character in association with the character if necessary. In this case, the display unit 140 may use an LCD. In this case, the display unit 140 may include an LCD controller, a memory capable of storing image data, and an LCD display device. In this case, when the LCD is implemented using a touch screen method, the LCD may operate as an input unit.

The portable terminal having the above configuration includes a character file, and the character file is stored in the memory 113. The structure of the character file has a configuration as shown in FIG. 2A.

Referring to FIG. 2A, the character file is composed of a header and images. That is, the header is composed of a character header 210, m animation headers 231-23m, and n frame headers 251-25n corresponding to each of the animation headers 231-23m. do. The character header 210 is an information header that defines the type of the character and the number of animations. The number of animations is the number of characters that can be represented by the corresponding character type. The animation headers 231 to 23m are information headers that define the type of animation and the number of frame images. If the number of frame images is 1, the single header is a single image. The frame header 251-25m is an information header defining frame information constituting the animation and the number of frame images, and is composed of a number corresponding to the number of frame images of the corresponding animation header. That is, the number m of animation headers is provided as the number of animations of the character header 210, and the number n of the frame headers is provided as the number of corresponding animation headers. When the character images 271-27m are provided as many as the number of animation headers, the character image corresponding to each animation header corresponds to the number of corresponding frame headers.

FIG. 2B is a diagram showing the structure of the character header 210 of FIG. 2A, FIG. 2C is a diagram showing the structure of the animation header 231-23m of FIG. 2A, and FIG. 2D is a frame header 251-25m of FIG. 2A. It is a figure which shows the structure of.

Referring to FIG. 2B, the character header is an information header such as type 211 of the corresponding character file, detailed information about the character type 211, and the number of animations 215 for the character type 211. . The character header 210 includes a character type 211, a character description 213, and an animation counter 215. In the embodiment of the present invention, as described above, the character type 211 includes an avatar type, an avatar-house type, an item type, and a back-scenery type. Assume that The avatar type indicates a memory area for an avatar, and the avatar-house type indicates a memory area for an avatar house. Here, the avatar house is a screen of a mobile terminal displayed in a standby state, and is composed of a combination of a background screen and items. The item type represents a memory area for an item that can be used in the avatar house, and the item may include all items included in the avatar house and items not included in the avatar house. The back-scenery type indicates a memory area related to a background screen that can be used for the avatar house, and the background screen may include a background screen included in the avatar house and a background screen not included. .

Referring to FIG. 2C, the animation headers 231 to 23m are animation identifiers (anini) 241, start indexes 243, message information 245, frame counters, framecnts 247, and the like. Is done. The animation identifier (aniID) 241 may store an identifier of an image block displayed as an animation. The start index 243 may store an address for finding the start of the frame image, and when the image compression is not used, the start index 243 may not be used. Text information that may be included in an animation operation may be stored in the message 245 area. The frame counter (framecnt) 247 region may store the number of frame images (the number of the frame headers) of the image blocks that can be displayed by the corresponding animation. In this case, the size of the image block displayed as the animation may be composed of at least two frame images, and a single image (frame image composed of one: non-aniation: just one-cut image) is not displayed as an animation. The frame counter 247 stores "1 (that is, n = 1)".

Referring to FIG. 2D, the frame header 251-25m includes position information and display interval information of the display unit 140 of the mobile terminal in which the frame image is displayed. In this case, the PosX 261 and PosY 263 are starting position (relative coordinate) information for displaying the corresponding image on the display unit 140, and width 265 and height 267 are information indicating the size of the frame image. Accordingly, the display position of the corresponding frame image is determined by the PosX 261, PosY 263, width 265, and height 267. In addition, the display interval 269 represents a time interval until the next frame display when the frame image is an animation image composed of two or more, and "0" is stored in the case of the frame header of the last frame image. In addition, even when the image is a single image, "0" is stored in the display interval 269.

The number of the frame headers having the structure as shown in FIG. 2D is determined by the number of frame counters 247 of each of the animation headers 231 to 23m as described above. That is, for example, if the number of frame images constituting the image block is 10 in the animation header 231, the number of frame headers of the frame header 251 is 10, and if the number of frame images constituting the image block of the animation header 232 is 15 The number of frame headers 252 is 15. Accordingly, the number n of the frame headers 251-25m is determined by the value of the frame counter 247 stored in the corresponding animation header 231-23m.

In the embodiment of the present invention, as described above, the frame headers are described as an example in which the number of frame headers corresponding to the respective frame images of the image block that performs each animation. In the case of using such frame headers, when the image is displayed on the display unit 140, the position of each frame image is changed to display an animation operation. However, when composing the frame image, the frame image may be configured by changing the position of the image in advance. The frame image configured in this manner is displayed at a fixed position of the display unit 140, but since the display position of the images in the area displaying the frame image is variable, it can also be displayed by an animation operation. Therefore, when displaying the character image, the structure of the frame image may use both the former and latter methods.

3A to 3D show examples of character images corresponding to character structure files as shown in FIGS. 2A to 2D. 3A is an example of an avatar image, which is one animation, and the frame counter value is seven. 3B illustrates seven item images as an example of an item image, and the frame counter value is 1 at this time. 3C is an example of a background image, and the frame counter value is one. 3D illustrates an example of an avatar house image. The configuration shows an example of an avatar, an item, and a background image.

In this case, when the avatar house image as shown in FIG. 3D is displayed, the avatar and item images may be overlaid on the background image. In this case, the overlay display area of the avatar and the item displayed in the area displaying the background screen image may be determined by a header (here, a frame header) of the character file. In this case, when the avatar and / or item images are overlaid on the overlay area, the avatar and / or item images may be displayed as they are, and the avatar and / or item images may be set on the background image. It may be displayed by blending in proportion. Here, the image that becomes the background of the display unit 140 as the background image is referred to as a background image, and the image inserted and overlaid on the background image is referred to as an overlay image.

In addition, the embodiment of the present invention includes a buffer (back buffer) for storing the background image and a buffer (overlay buffer) for storing the overlay image, and overlaying the overlay image between the avatar buffer in the back buffer for storing the image. An embodiment will be described.

First, a first embodiment using the back buffer and the overlay buffer will be described.

In the first embodiment, the control unit 110 includes display buffers as shown in FIG. 4 to display the avatar image.

Referring to FIG. 4, buffers for storing display data displayed on the display unit 140 include a back buffer 151, an overlay buffer 153, and a display buffer 155. Here, the back buffer 151 is a buffer for storing the screen display data (desktop image) displayed on the display unit 140, and the overlay buffer 153 is a buffer for storing the image (overlay image) that is overlaid with the screen display data As a result, a display position is set in a specific area set in the display unit 140. The display buffer 155 overlays the data of the back buffer 151 and the data of the overlay buffer 153 on the display unit 140. In the following description, it is assumed that the overlay image is an avatar image. Here, the avatar image may be formed as shown in FIG. 5A, and each avatar image has a display position (Pos X, Pos Y, Width, Height of the frame header) determined, and thus, a screen area in which the background image is displayed. You can set the overlaid area in.

The buffers 151, 153, and 155 may be located in an internal memory of the controller 110, a data memory area of the memory 130, or a display memory area of the display unit 140. In the first embodiment of the present invention, it is assumed that the buffers 151, 153, and 155 are located in the internal memory of the controller 110.

In FIG. 2, the overlay buffer 153 includes a display area in which the avatar image is stored and a transparent area in which the avatar image does not exist. In this case, the avatar image of the display area is overlaid with the display data stored in the back buffer 151, and the display area stored in the back buffer 151 is displayed as it is without overlay. In addition, the size and position of the overlay buffer 153 may be changed by the user. In this case, the size and position of the overlay buffer 153 may be set using a menu, and may be set using a cursor.

The controller 110 stores the background data for displaying on the screen of the display unit 140 in the back buffer 151, and stores the avatar image for overlay display on the screen data in the overlay buffer 153. Then, the display data stored in the back buffer 151 and the overlay buffer 153 are overlaid on the screen buffer 155 and displayed on the display unit 140 as shown in FIG. 4.

In this case, the size and position of the overlay buffer 153 may vary according to a user's designation. That is, when the user requests the position change of the overlay buffer 153, the controller 110 moves the position of the overlay buffer 153 up, down, left, and right according to a user's designation. In addition, when the user requests to change the size of the overlay buffer 153, the controller 110 can enlarge or reduce the size of the overlay buffer 153 according to the user's designation. Accordingly, the avatar image displayed on the screen of the display unit 140 may move to a specific area of the screen according to the user's position designation, and the size of the avatar image displayed on the screen of the display unit 140 may be changed according to the user's size change. Can be.

5 is a diagram illustrating a procedure of overlaying and displaying an avatar image on a display screen in a mobile terminal according to an embodiment of the present invention.

Referring to FIG. 5, when the user operates the portable terminal, the controller 110 performs a display mode in step 311. If the user selects the avatar display mode in the display mode, the controller 110 detects the avatar display mode in step 313, buffers the background data of the display unit 140 in the back buffer 151 and overlays the avatar image to be displayed. Store in buffer 153. In this case, the mobile terminal may include a plurality of avatars, and each avatar has a structure as shown in FIGS. 2A to 2D. The avatar may be selected by the user, and in the avatar display mode, the avatar image of the specific animation header having the structure as shown in FIG. 2C may be displayed by the state of the mobile terminal or the user's selection. The avatar images corresponding to the specific animation header are stored in the character image storage area of the memory 130 as shown in FIG. 2A, and the number of frames of the avatar images is determined by the frame counter of the avatar animation header. The position of each frame image may be known by corresponding frame headers of FIG. 2D. That is, the number of frames of the avatar image corresponding to one animation header is plural, and the frame images of the avatars are displayed in a continuous operation.

Therefore, the controller 110 processes the display data in units of frames. In the first embodiment of the present invention, it is assumed that the back buffer 151, the overlay buffer 153 and the screen buffer 155 are located in the internal memory of the controller 110 as described above. In this case, the control unit 110 buffers the screen display data and the avatar image data in frame size units, and overlays the buffered data in pixel units and outputs them to the screen buffer 153 for display. do. Although it is described here as overlaying the buffered data in pixel units, it may be overlayed in line units or frame units. In addition, the size of the back buffer 151 may be set to be the same as or larger than the size of the screen buffer 155, the size of the screen buffer 155 may be the same as the screen size of the display unit 140.

In this case, if it detects the avatar display mode in step 313, the controller 110 buffers the screen display information to be displayed on the screen of the display unit 140 in the back buffer 151 in step 315, and displays the avatar image of the first frame in the overlay buffer 153. Buffer The controller 110 selects the first pixel in step 317 and checks whether the pixel is in the overlay buffer region in step 319. In this case, if it is not the pixel of the overlay buffer 153, the controller 110 selects the pixel data of the back buffer 151 and stores it in the screen buffer 155 in step 325.

However, when the pixel is located in the overlay display area, the controller 110 detects it in step 319 and checks whether the pixel is located in the transparent area of the overlay area in step 321. In this case, the transparent area of the overlay area is when there is no avatar image at the corresponding pixel position of the overlay buffer 153. In this case, the controller 110 proceeds to step 325 and stores the pixels stored in the back buffer 151 in the screen buffer 155. That is, the screen display data is displayed because there is no overlay data but actual data to display. In addition, the controller 110 may display the transparent area on the display unit 140 in order to sharpen the display of the avatar image. In other words, the outline of the avatar image is clearly displayed to clearly display the operation of the avatar.

Also, when the pixel position is an overlay display area and is not a transparent area in the overlay display area, this is an overlay display area in which an actual avatar image is located. In this case, the controller 110 detects this through steps 319 and 321, and stores the pixel data of the overlay buffer 153 in the screen buffer 155 to perform an overlay function in step 323. In this case, the overlay method may store the avatar image of the overlay buffer 153 instead of the screen display pixels stored in the back buffer 151. In this case, the color of the avatar image itself is displayed. However, the average value of the screen display pixel data of the back buffer 151 and the avatar image pixel data of the overlay buffer 153 or the weighted average value of the avatar image pixel may be taken and stored in the screen buffer 155. In this case, the avatar image is overlaid on the screen display data.

Then, after selecting the next pixel, it is checked whether the pixel position is a pixel within the screen display range of the display unit 140. That is, the display data processed by the controller 110 may be out of the size of the display unit 140. Accordingly, the controller 110 determines whether the display of one frame is finished when the controller 110 checks whether the pixel is within the range of the screen of the display unit 140. Therefore, if the pixel is within the screen range, the controller 110 detects it in step 329 and proceeds to step 319 to repeat the above operation. When the steps 319 to 327 are repeated, the screen buffer 155 is overlaid with the pixels of the back buffer 151 and the pixels of one frame of the overlay buffer 153. The pixels stored in the screen buffer 155 are transferred to and displayed on the display unit 140 in line units.

As described above, the controller 110 first determines whether the current pixel position is a pixel in the avatar display area, and if the display area is in the range of the display area, determines whether the display information of the avatar for the pixel is a pixel in the transparent area. In this case, the avatar display area is processed by having the start point of the display area in which the controller 110 displays the avatar image. In this case, when the avatar display area is not the transparent area, that is, when the bitmap information is included, the avatar image may be expressed in two ways. One method is to output the pixels of the avatar image as it is. The other method is to calculate and output the average value of the pixels of the two regions. In this case, the latter average value may be recognized as a method of output, and may be subjected to other forms of image processing such as a blur effect. On the other hand, if it is not the avatar display area or the transparent area, the screen display data (ie, the background image) is output as described above.

When the overlay operation of the screen and avatar images of the first frame is finished, the controller 110 detects this in step 329, checks whether the currently processed frame is the last avatar image frame in step 231, or proceeds to step 333. After the screen and the avatar image of the next frame are selected, the above operation is repeated while buffering the back buffer 151 and the overlay buffer 153 in step 315. The above operation is terminated after processing up to the avatar image of the last frame of the animation discriminator.

In the overlay display mode as described above, the controller 110 overlays and stores the desktop image of the back buffer 151 and the overlay image of the overlay buffer 153 on the screen buffer 155, and the controller 110 stores the overlay image stored in the screen buffer 155. Displayed on the display unit 140. In the overlay display mode, the images buffered in the back buffer 151 and the overlay buffer 153 are processed in units of frames. If the image to be processed is the same as the previously processed frame image, the contents of the buffer are maintained as it is. That is, in the overlay buffer 153 storing the overlay image, the overlay image may be changed in units of frames (that is, when the overlay image is an animated image such as an avatar image, the overlay image is changed in units of frames, and one frame image is changed. In the case of an item consisting of an overlay image, the overlay image is fixed and does not change at the frame interval. In step 317 of FIG. 5, the buffering operation is performed. However, in the case of the back buffer 151, the desktop image may not be changed in units of frames. In this case, the controller 110 maintains the background image previously buffered in the back buffer 151 in step 315.

In addition, the back buffer 151 may have the same size as the screen buffer 155, so that the image stored in the back buffer 151 may be the background range of the horizontal and vertical directions displayed on the display unit 140. The overlay image buffered in the overlay buffer 153 is overlaid with the image of the back buffer 151 and stored in the screen buffer 155. At this time, the start point of the screen buffer 155 is the start point of the background image of the back buffer 151, and the start point of the overlay display area at a predetermined position. An overlay area is set at a specific position between a start point and an end point of the overlay display area.

In this case, in order to overlay the overlay image on the desktop image and display it on the display unit 140, as described above, the desktop image is buffered in the back buffer 151 and the overlay image is buffered in the overlay buffer 153. Thereafter, the controller 110 overlays the image pixels of the back buffer 151 and the overlay buffer 153 and buffers the screen buffers 155 starting from the start point of the background screen range of the display unit 140 to the last point. In this case, the desktop image pixels stored in the back buffer 151 are buffered since the starting point of the desktop image is not an overlay display area, and the desktop image pixels are buffered in the display area other than the overlay display area. . The pixels of the background images are buffered in the transparent area (that is, the area in which no actual image to be displayed in the overlay area exists) in the overlay display area, and the overlay image pixels are buffered only in the overlay display area. In this case, the pixels buffered in the overlay display area may be the overlay image pixels, and may be an average value of the background image and the overlay image pixels. In addition, the transparent area of the overlay area may be buffered with pixels of the transparent area of the overlay image instead of the background image pixels as described above.

As described above, when all the pixels of the background image of the back buffer 151 and the overlay images of the overlay buffer 153 are stored in the screen buffer 155 and all the pixels within the screen display range are buffered, the controller 110 displays the screen and avatar images of one frame. This will terminate the overlay operation. In addition, the overlay operation of the two images as described above is repeatedly performed in units of frames, and the images of the screen buffer 155 overlaid as described above are displayed on the display unit 140.

The avatar image may be overlaid by the procedure as shown in FIG. 5. 5 illustrates that the avatar image, which is the overlay image, is fixed at a specific position in the display unit 140. However, the avatar image displayed on the display unit 140 of the mobile terminal may change its display position and may also change the size of the displayed avatar image. 6 is a flowchart illustrating a procedure of varying and displaying the size and image of an avatar image displayed on the display unit 140 in the mobile terminal.

Referring to FIG. 6, when the display mode is performed in the portable terminal, the controller 110 detects this in step 411 and checks whether the display mode is in the overlay display mode in step 413. If it is not the overlay display mode, the controller 110 detects this in step 421 and performs the normal display mode. The general display mode refers to an operation of displaying, by the portable terminal, display information generated during the operation of the portable terminal on the display unit 140.

In this case, when a change request of the avatar display position is generated while the overlay display mode is performed, the controller 110 detects this in step 417 and performs a procedure of changing the display position of the avatar image in step 419. FIG. 8 is a flowchart illustrating a procedure of changing a display position of an avatar image in step 419 of FIG. 6.

Referring to FIG. 8, when a display position change of the avatar image is requested, the controller 110 senses this and waits for reception of the change position information on the display unit 140. In this case, information for changing the display position of the avatar image may be input using a stylus pen or a direction key. When the location information is input, the controller 110 recognizes it in step 511, obtains the location information input in step 513, obtains an offset value of the input location information at a basic output location in step 515, and then Add the offset information to the default output position. Here, the default output position means the position of the display unit 140 on which the avatar image is displayed when the position is not changed. In step 517, the controller 110 displays a display change position of the avatar to which the offset information is added, on the display unit 140, and waits for a user's setting. In this case, when the user inputs the setting key, the control unit 110 detects this in step 519 and stores and returns the display position of the avatar image to which the offset information is added.

As described above, the change of the display position of the avatar image is outputted as it is to the basic output position of the controller 110 or after the user determines whether the display position is changed. Read a value to get position conversion information. The offset information according to the acquired position conversion information is added to the basic output position of the avatar image, and the converted data is used for outputting the overlay screen.

In addition, when the user requests to change the size of the avatar image in the display mode, the controller 110 recognizes this in step 421 of FIG. 6 and performs a procedure of changing the display size of the avatar image in step 423. . FIG. 9 is a flowchart illustrating a procedure of changing the display size of the avatar image in step 423 of FIG. 6.

Referring to FIG. 9, when the avatar size change is requested, the controller 110 accesses the avatar image set as a default in step 551 and displays the avatar image on the display unit 140, and waits for an input for adjusting the size of the user. In this case, the size change request of the avatar image may be input by the user using the stylus pen, a direction key, or a numeric key. In this case, the size adjustment of the avatar image may be enlarged or reduced. In this case, the controller 110 detects this in step 553 and magnifies the displayed avatar image to the required size. If the user requests to zoom out, the controller 110 detects it in step 557 and requests the displayed avatar image in step 559. To the size it was created. When the user inputs a setting key, the controller 110 detects this in step 561 and stores the size of the avatar image whose size is adjusted in step 563.

As described above, when a command related to the size change of the avatar image (ie, the overlay image) is generated, the controller 110 loads and displays an image of the avatar and receives a size adjustment value. In this case, the size adjustment value of the avatar image may be designated by the actual user as a number or may be recognized as an input using a stylus pen. In this case, when the scaling value is enlarged, the enlarged image conversion process is performed, and when the scaled value is reduced, the reduced image conversion process is performed. The two processes basically have the structure of transforming the bitmap of the pixel using the average value and extending the coordinates, but as a mathematical model, the calculation is performed with an external point in the case of magnification and the end point in the case of a reduced image. There can be. The converted avatar image size information is used as a plane size value when the controller 110 outputs the avatar image.

In addition, when the overlay display mode is selected in the display mode, the controller 110 detects it in step 413 and performs the overlay display mode in step 415. 7 is a flowchart illustrating a procedure of an overlay display mode performed in step 415.

Referring to FIG. 7, in steps 451 to 465, the controller 110 overlays and displays screen image pixels and avatar image pixels of one frame as in steps 317 to 329 of FIG. 5. The user may change the display position and / or size of the avatar image while overlaying the desktop image and the avatar images as described above. In this case, when the display position of the avatar image is changed, the controller 110 detects this in step 469 and performs the procedure shown in FIG. 8 in step 471 to change the display position of the avatar image. When the display position is changed, when displaying the avatar image of the next frame, the controller 110 displays the avatar image in the overlay area where the position is changed in step 455. In addition, if the size of the avatar image is required to be changed, the controller 110 recognizes this in step 473, and changes the size of the avatar image while performing the procedure illustrated in FIG. 9 in step 475. When the size of the avatar image is changed, when displaying the avatar image of the next frame, the controller 100 displays the avatar image in the overlay area where the size is changed in step 455.

The overlay display operation of the avatar image is repeatedly performed until the last frame of the avatar image. If the avatar image frame is the last avatar image frame, the controller 110 detects this in step 467 and ends the overlay display mode.

10 is a flowchart illustrating an overlay display procedure according to a second embodiment of the present invention. In the second embodiment of the present invention, the overlay function is implemented using only the back buffer without using the overlay buffer. That is, in the second embodiment, the overlay function is implemented by inserting overlay data into the background data of the back buffer.

Referring to FIG. 10, when an overlay display function is started, the controller 110 initializes the overlay data list to an empty state in step 611 and initializes a flag indicating whether overlay data is output. Here, the overlay image uses uncompressed image data, and in the embodiment of the present invention, it is assumed that the overlay image is bitmap data. Therefore, the overlay data list may be an overlay bitmap list (hereinafter referred to as OBL).

In step 613, the controller 110 processes functions for performing the overlay function according to the user's input. FIG. 11 is a flowchart illustrating a procedure of an input processing performed in step 613 of FIG. 10. In FIG. 11, the controller 110 sets whether to output the OBL, add or delete an image to be overlaid on the OBL, and change changes according to a user input.

Referring to FIG. 11, the controller 110 checks whether an input for determining the output of the OBL is generated in step 711. If an input for changing the output of the OBL is generated, the controller 110 returns the user's setting value to the user's set value in step 713. Changes the output of the OBL. That is, the controller 110 sets the OBL flag when the user requests setting of the overlay display function in steps 711 and 713, and resets the OBL flag when the setting of the overlay display function is released. Secondly, the controller 110 checks whether an input for adding a bitmap to the OBL is generated in step 715, and if a bitmap addition request is generated, the bitmap requested by the user in step 717, an output position on the display 140, A variable α value to be used for blending is set and added to the OBL. Third, the controller 110 checks whether an input for deleting the bitmap included in the OBL is generated in step 719. If a bitmap deletion request is generated, the controller 110 deletes the bitmap selected by the user from the OBL in step 721. Fourth, when the control unit 110 detects the occurrence of the request to change the output, position, and blending variable α value of the bitmap in step 723, the user changes the bitmap (output, position, and blending variable α value in step 725). ) Is applied to the corresponding bitmap in the OBL.

As described above, when the overlay display function is performed, the controller 110 outputs an OBL, adds or deletes a bitmap to the OBL, and changes setting values of the bitmap registered in the OBL, according to a user's setting. Can be.

In step 613, the controller 110 performs an overlay display function by the OBL after outputting the OBL, adding and deleting the bitmap, and changing the setting values of the bitmap. If the OBL flag is in the reset state, the controller 110 detects it in step 615 and copies the desktop data to the back buffer 151 in step 617, and copies the desktop data copied to the back buffer 151 in step 623. Copy it to the screen buffer 155. Thereafter, the controller 110 outputs the desktop data stored in the screen buffer 155 to the display unit 140 at step 625 to display the screen. The display method as described above is a general screen display method.

However, if the OBL flag is set in step 615, the controller 110 copies the background data to the back buffer 151 and then blends and overlays the data to be overlaid, in steps 619 and 621. That is, the controller 110 copies the desktop data to be displayed to the back buffer 151 in step 619, and copies the bitmap data included in the OBL to the overlay display area of the back buffer 151 in step 621. 12 is a flowchart illustrating a procedure of applying bitmap data of the OBL to the back buffer in step 621.

Referring to FIG. 12, in step 751, the controller 110 checks whether a bitmap for overlay display is included in the OBL. If the bitmap data to be overlaid is not included in the OBL, the procedure of copying bitmap data to the back buffer is terminated and the process proceeds to step 623 of FIG. 10. That is, when the OBL flag is set but no bitmap data is actually included in the OBL, only the background data is output. However, if bitmap data is included in the OBL in step 751, the controller 110 selects the first bitmap data registered in the OBL in step 753, and then in step 755, is the output flag turned on? Check it. If the output flag is not in the on state, the operation of copying the selected bitmap data to the background screen is not performed. That is, when bitmap data included in the OBL is applied to the back buffer 151, if the output flag of the bitmap data is off, the bitmap data included in the OBL is not copied to the back buffer 151 of the bitmap data.

However, when the output flag of the selected bitmap data is turned on, the controller 110 detects it in step 755 and analyzes the setting value of the corresponding bitmap data in step 757. Copy to In this case, the background data is copied to the back buffer 151, and the background data is copied while overlaying the bitmap data on the background screen. 13 and 14 are flowcharts illustrating a procedure of overlaying the bitmap data on the background data copied to the back buffer 151 in step 757 of FIG. 12. 13 is a flowchart illustrating an operation procedure when the blending variable α of the selected bitmap data is applied to the same value, and FIG. 14 is an operation procedure when the blending variable α of the selected bitmap data is set differently. It is a flowchart showing the.

First, referring to FIG. 1, in step 811, the controller 110 checks a blending variable α of the bitmap data. Herein, the blending variable α refers to a variable value in which two pixel data are mixed when the bitmap data is overlaid on the background data. In this case, when the blending variable α is 0, the desktop data is output as it is to the overlay display area where the bitmap data is displayed. When the blending variable α is 1, bitmap data is displayed on the overlay display area where the bitmap data is displayed. When the blending variable α has a value of 0 <α <1, the background data and the bitmap data are blended and output in the overlay display area according to the set value of the blending variable α.

Therefore, if the blending variable α is 0 in step 811, the controller 110 detects this and returns without performing the blending operation of the bitmap data. However, if the blending variable α has a value of 0 <α <1, the controller 110 detects it in step 811 and inputs the coordinates of the first pixel of the bitmap data to the position coordinate variables (x, y) in step 813. do. In step 815, the controller 110 applies the coordinates of the pixel to the bitmap coordinate variables sx + x and sy + y where the bitmap is to be positioned on the display unit 140. Then, does the corresponding coordinate belong to the display area of the display unit 140? Check it. That is, when the bitmap data is an avatar or an item, the start coordinate and the size of the frame image in which the corresponding image is displayed are predetermined in the frame counter of the frame image as shown in FIG. 2D. Therefore, after determining the position (x, y) of the pixels constituting the bitmap data in step 813, the controller 110 applies the pixel position to the coordinates (sx, sy) of the bitmap to be displayed on the display unit 140. After determining the position (sx + x, sy + y) to be displayed on the display unit 140, it is checked whether the position is within an area that can be displayed on the display unit 140. In this case, if it is within the area of the display unit 140, the controller 110 checks whether the corresponding pixel is a pixel in the transparent area. Here, the transparent area means an area in which no pixel of bitmap data exists in the overlay display area. Therefore, when the pixel is included in the screen display area and the pixel is not a pixel in the transparent area, the controller 110 determines that the blending variable α (0 <) is the pixel of the background screen and the pixel of the bitmap in the overlay display area in step 819. Blending to α <1) value. In this case, in the blending method, R1, G1, and B1 RGB values of pixels of the background screen existing at (sx + x, sy + y) coordinates of the back buffer 151 are referred to as R1, G1, and B1, respectively. When the RGB values of the corresponding coordinate (x, y) pixels are R2, G2, and B2, the pixels blended in the back buffer 151 at the corresponding position are alpha-blended as follows.

R1 = αR2 + (1-α) R1

G1 = αG2 + (1-α) G1

B1 = αB2 + (1-α) B1

In operation 815, if the pixel is outside the screen display area or the pixel is in the transparent area, the blending operation is not performed. In this case, a pixel of the background screen may be displayed at a corresponding pixel position of the bitmap data. After performing the blending operation on one pixel of the bitmap data as described above, the controller 110 inputs the coordinates of the next pixel of the bitmap data into the position coordinate variables (x, y) in step 821. Returning to the step, the above operation is repeated.

Therefore, when the blending variable α (0 <α <1) has a value, the control unit 110 performs steps 813 to 823 and the pixels of the corresponding background data corresponding to the pixels of the bitmap data of the overlay display area. Blended as above and stored again in the back buffer 151. Accordingly, the bitmap data may be mixed with the background data and the blending variable α (0 <α <1). When the blending of the pixels of the overlay display area where the bitmap data is to be displayed is repeated by repeating the above operation, the controller 110 detects this in step 823 and returns to FIG. 12.

If the blending variable α is 1 (α = 1) in step 811, the controller 110 inserts the bitmap data into the overlay display area as it is, in steps 831-841. When the blending variable α is 1 (α = 1), except for inserting the pixel of the bitmap data into the overlay display area without blending in step 837, the operations of steps 831 through 841 are performed in step 813. It is performed similarly to step 823. In this case, since bitmap data of the overlay display area is inserted without blending in step 837, the back buffer 151 has a structure including the bitmap data in the overlay display area of the background data. In this case, when the pixels of the transparent area of the bitmap data are positioned, the pixels of the background screen remain in FIG. 13, but if the operation of step 835 is not performed, the overlay display area includes the bitmap data. It can be seen that it can be inserted as it is.

FIG. 14 is a flowchart illustrating a method of blending background data and bitmap data in an overlay display area by setting another blending variable α in each pixel of the bitmap data.

Referring to FIG. 14, the controller 110 checks the first pixel position in step 851, and then analyzes the blending variable α of the corresponding pixel in step 853. In this case, when the blending variable α is 0, overlay display of the corresponding pixel of the bitmap data is not performed. Second, if the blending variable α has a value between 0 and 1, steps 855 to 861 are performed to blend pixels of the background data and pixels of the bitmap data according to the blending variable α as described above. Store in back buffer 151. Third, when the blending variable α value is 1, the pixel of the bitmap is inserted at the corresponding position of the back buffer 151. Accordingly, as described above, the pixels of the bitmap data to be displayed in the overlay display area are processed according to the blending variable α value, respectively, and are stored in the overlay display area position of the back buffer 151. The method as illustrated in FIG. 14 may process some pixel data of bitmap data to be displayed in the overlay display area with different blending variable α values to perform an overlay display function.

After processing bitmap data as described above with reference to FIG. 13 or FIG. 14 and storing the bitmap data in the back buffer 151, the controller 110 returns to step 761 of FIG. 12 to check whether the next bitmap data included in the OBL exists. do. That is, when there are two or more bitmap data registered in the OBL, the controller 110 detects this in step 761, selects the next bitmap data in step 759, and returns to step 755 as shown in FIG. 13 or 14. While performing the operation, the bitmap data processed in the back buffer 151 is inserted. Thereafter, when all bitmap data registered in the OBL is processed and stored in the back buffer 151, the controller 110 detects this in step 761 and returns to step 623 of FIG. 10.

Then, the controller 110 stores the data stored in the back buffer 151 in the screen buffer 155 in step 623, and outputs the display data stored in the screen buffer 155 to the display unit 140 in step 625. The display unit 140 then displays the display data output from the screen buffer 155. In this case, the displayed data displays the background data and the bitmap data in the set overlay display area of the background screen. The above operation is performed until the overlay display function is released. When the overlay display function is terminated, the controller 110 detects this in step 627 and releases the registration of the bitmap data registered in the OBL in step 629. Quit.

The overlay display operation as described above will be described with reference to the avatar house screen as shown in FIG. 3D. It can be seen that the avatar house screen having the configuration as shown in FIG. 3D is displayed by overlaying the avatar image and the item images as shown in FIGS. 3A and 3B on the background screen image as shown in FIG. 3C. Accordingly, it can be seen that the standby screen image as shown in FIG. 3C may be a background image, and the avatar and item images as shown in FIGS. 3A and 3B are overlay images.

The controller 110 initializes the OBL and OBL flags in step 611 of FIG. 10, and processes OBL information input by the user in step 613. In this case, when the avatar bitmap data as shown in FIG. 5A and the item bitmap data as shown in FIG. 5B are selected by the user and the blending variable α value is selected, the controller 110 performs the procedure as shown in FIG. 11 in step 613. The avatar bitmap data and the item bitmap data are registered to the OBL, the blending variable value of each bitmap is set, and the OBL output flag is set to perform the overlay display function. Then, since the OBL flag is turned on, the controller 110 detects this in step 615 of FIG. 10, and copies the background screen image of FIG. 3C to the back buffer 151 as background data in step 619 of FIG. 10. In step 621, the controller 110 copies or blends the bitmap data registered in the OBL to the back buffer 151 as an overlay image. In the following description, the original overlay image is inserted as it is without blending the overlay image on the background image.

In this case, the controller 110 first selects the item image as shown in FIG. 3B while performing the procedure of FIG. 12, and inserts the item image into the back buffer 151 while performing steps 831 to 841 of FIG. 13. That is, after analyzing the start position and size of the item image present in the frame header of the item image as shown in FIG. 3B, the item images are copied to the back buffer 151 according to the display position. Thereafter, the controller 110 secondly selects the avatar image as shown in FIG. 3A and inserts the avatar image into the back buffer 151 while performing steps 831 to 841 of FIG. 13. In this case, the avatar and item images (overlay images) of FIGS. 3A and 3B are inserted into the background screen (desktop) of FIG. 3C and reconstructed into the image of FIG. 3D. Then, the controller 110 copies the display screen data reconstructed by overlaying the avatar and item images on the background screen image as described above in step 623 of FIG. 10 to the screen buffer 155, and displays the display data of the screen buffer 155 in step 625. Output to 140 and display as shown in FIG. 3d.

At this time, the above operation procedure is performed in units of frame images, wherein the avatar images as shown in FIG. 3A are composed of a plurality of frame images that are displayed as animations, and the background screen and item images are just one-cut. image, so the change is displayed in the same form every frame. Therefore, the avatar images composed of the animation are inserted into the back buffer 151 on a frame-by-frame basis. Here, the background image and the item images are taken as an example of one frame image. However, when the images are also composed of a plurality of frame images in the form of animation, an image of a frame corresponding to the back buffer 151 like the avatar in every frame. If you copy them, you can display them in the form of animation.

15 is a view for explaining an operation of overlaying a character image on the display unit 140 according to the second embodiment of the present invention.

Referring to FIG. 15, in the overlay display mode, the controller 110 overlays and stores an overlay image on a desktop image in the back buffer 151, and then stores the image stored in the back buffer 151 in the screen buffer 155 to display the display unit. Control to display at 140. In the overlay display mode, the background image and the overlay images are processed in units of frames.

The back buffer 151 may have the same size as the screen buffer 155, and the sizes of the buffers 151 and 155 may have a size capable of buffering images within the screen range displayed on the display unit 140. Therefore, the image stored in the back buffer 151 may be a background screen range in the horizontal and vertical directions displayed on the display unit 140. The overlay image of the overlay display area is overlaid and stored on the image of the background screen in the back buffer 151, and the overlay display area may be an arbitrary position within the screen display range as illustrated in FIG. 15. In FIG. 15, it is assumed that a desktop image and an overlay image (in this case, avatars and items are shown) are displayed as shown in FIGS. 3A to 3D. It may be determined by the frame header information of the character structure as shown in Figs. 2a to 2d. In this case, when the user of the mobile terminal changes the position of the overlay image by using a cursor or the like, the controller 110 checks the display position of the moved overlay image and then changes the display position of the image corresponding to the frame structure. Can be.

Here, the image start point of the display screen is a start point of the background image of the back buffer 151 (or, if the start point of the overlay image is the start point of the display screen, it may be the start point of the overlay image), and the preset overlay display area From the beginning of the overlay images are stored overlayed on the desktop image. An overlay area is set at a specific position between a start point and an end point of the overlay display area.

Referring to FIG. 15, an operation of overlaying the overlay image on the desktop image and displaying the overlay image on the display unit 140 will be described. First, the controller 110 buffers the desktop image as shown in FIG. 3C to the back buffer 151. Thereafter, the control unit 110 overlays the overlay image pixels to be displayed in the overlay display area on the background image while buffering the back buffer 151 while starting from the start point of the background range of the display unit 140 to the last point. In this case, the desktop image pixels are buffered in the back buffer 151 because the back buffer 151 is not an overlay display area from the start point of the display screen to the start point of the overlay display area. The desktop image pixels are also displayed in the screen display area other than the overlay display area. Is buffered. In the overlay display area, the set overlay images are buffered. In this case, the pixels of the background images may be buffered in the transparent area in which no image pixels are actually displayed in the overlay display area, and may be buffered into the actual transparent area. In addition, when the overlay image is buffered in the overlay display area, the overlay image pixels may be buffered as they are, and the overlay image pixels may be blended with the background image by giving an appropriate weight to the overlay image pixels.

As described above, when all the pixels of the background image and the overlay image are buffered in the back buffer 151, the controller 110 buffers the screen image data of the back buffer 151 in the screen buffer 155 to overlay the screen and avatar images of one frame. The operation ends. The overlay operation of the two images as described above is repeatedly performed in units of frames, and the images of the screen buffer 155 overlaid as described above are displayed on the display unit 140.

In addition, although the above example has been described with an example consisting of the back buffer 151 and the screen buffer 155, the same applies to the case of the back buffer 151, the overlay buffer 153 and the screen buffer 155 as in the first embodiment. That is, when using three buffers as described above, the background image is copied to the back buffer 151, item images and avatar images are copied to the overlay buffer 153, and then the overlay is output to the output of the back buffer 151. If the output of the buffer 153 is inserted (or blended) and copied to the screen buffer 155, the same effect is obtained.

In addition, the direction of the avatar image may be adjusted when displaying the avatar. That is, the recent portable terminal can rotate the direction of the displayed image. Rotation of the displayed image at this time may be 90 degrees, 180 degrees, and 270 degrees. Therefore, in the avatar overlay display function according to an embodiment of the present invention, the direction control function of the image can be used.

[X] [Y] → [X1] [Y1]

[X`] [Y`] = [X1] [Y1]

Equation 1 represents an output value in a general case, and Equation 2 represents an output value when the background screen is rotated. That is, if the value of [X1] [Y1] is output as the value output to the initial [X] [Y], when the direction is changed and the original [X] [Y] output is in the form of upside down and left and right , [X '] [Y'] = [Y1] [X1]. In the embodiment of the present invention, the method of changing the direction of the image may be displayed by rotating only the direction of the overlay image while maintaining the direction of the background image.

In addition, when the orientation of the desktop image is already adjusted and buffered in the back buffer 151, the screen buffer 155 is inverted in the orientation of the desktop image or the overlay image is converted to process the conversion of [X] [Y]. You can do

As described above, the mobile terminal displaying the multimedia data may display the multimedia image by overlaying the multimedia image on the screen image displayed on the display unit. In particular, when the multimedia image is an avatar image, there is an advantage in that the avatar image is overlaid on the displayed screen image. In addition, when the displayed avatar image is an image related to the state of the portable terminal, there is an advantage that the state of the portable terminal can be visually represented.

Claims (16)

In the device for displaying a multimedia image of a mobile terminal, Multimedia memory for storing desktop and overlay images, A back buffer for storing the desktop image, An overlay buffer for displaying the overlay images; Screen buffer, A controller which overlays the image of the overlay buffer on the image of the back buffer and stores the image in the screen buffer, and outputs the image of the stored screen buffer to a display screen; And the display unit for displaying a display screen output from the controller. The method of claim 1, wherein the memory for storing the overlay image of the multimedia memory is a character memory, The character memory, Header memory for storing the position and size information of the overlay image, And an image memory for storing the overlay image. The method of claim 2, The overlay buffer has a position and a size corresponding to the header memory, and the overlay image includes an image region and a transparent region having no image. And the screen buffer overlays the background image of the back buffer and the overlay image on the overlay display area of the background image. The device of claim 3, wherein the overlay image stored in the screen buffer is stored as an average value with respect to the background image. In the overlay display method of the mobile terminal, Buffering the desktop image, Determining an overlay display area in the display area of the background screen; Inserting an overlay image into the overlay display area; And displaying a desktop image into which the overlay image is inserted. The method of claim 5, wherein the inserting the overlay image comprises: Maintaining the desktop image if the overlay image is not transparent; And if the overlay image exists, inserting the overlay image into the overlay display area. The method of claim 6, wherein the step of inserting the overlay image, And blending with the background image by the blending variable α (0 ≦ α ≦ 1) of an overlay image. The method of claim 6, wherein the displaying of the overlay image comprises: And displaying the average value of the background image and the overlay image. An apparatus for overlaying an image on a mobile terminal, Character memory for storing desktop and overlay images, Back buffer and screen buffer, A controller which overlays and stores a desktop image and an overlay image on the back buffer, and stores the image of the back buffer in the screen buffer when the storage is completed; And the display unit for displaying a display screen output from the screen buffer. A character header including information about the character type and the number of animations for the character type, Animation headers including information about the animation type and the number of frame images for representing the animation, and provided as many as the animation header of the character header; Frame headers including size and display position information of the frame image constituting the animation, each frame header number of the animation header, The apparatus as claimed in claim 1, wherein the frame image comprises frame images corresponding to the number of frame images of the frame header corresponding to the animation header of the animation header. The method of claim 10, wherein the character header, A character type representing identifier information such as a wallpaper image, which is a wallpaper, and an avatar and item image, which are overlay images; The apparatus as claimed in claim 1, wherein the apparatus comprises an animation number representing the number of animation types that can be expressed in the character type. The method of claim 11, wherein the animation header, An identifier for distinguishing a defined motion animation or motion image of the character, And the frame image is configured to represent the animation. The method of claim 12, wherein the frame header, Starting position data of the frame image, The size data of the frame image, And the display time interval data between the frames. The apparatus of claim 13, wherein the controller stores the selected wallpaper as a wallpaper image in the back buffer and overlays the selected avatar and / or items on the wallpaper image. The apparatus of claim 14, wherein the overlay image stored in the screen buffer is stored as an average value with respect to the wallpaper image. The apparatus of claim 15, wherein the controller changes the size of the overlay image to a size corresponding to an image size designated when the size of the overlay image is requested to be changed.

Images