KR20050096625A - System for reproducting moving images - Google Patents

Abstract

The present invention relates to a video reproducing system, and more particularly, to a video reproducing system capable of reproducing a large amount of multimedia files through a mobile terminal having a limited memory capacity, for example, a mobile phone or a personal portable terminal. .

The video playback system according to the present invention streams the video file to the mobile terminal according to a video file transmission request input from the mobile terminal through a wireless network, and provides the corresponding codec file according to the codec request from the mobile terminal. A video service server; Requesting a video file to the video service server according to a user's operation signal, requesting a codec file to the server upon receiving video stream data from the server, and real-time video stream data using the codec file transmitted from the server. It characterized in that it comprises a mobile terminal including a media playback unit to play.

Description

Video playback system {System for reproducting moving images}

The present invention relates to a video playback system. More particularly, the present invention relates to a video playback system that enables a user to view a huge amount of multimedia files through a mobile terminal having a limited memory capacity, for example, a mobile phone or a personal portable terminal. will be.

Today, with the development of the Internet, there is a need for a codec capable of streaming in real time, and many kinds of software codecs have been announced. Accordingly, if anyone wanted to download the necessary software codec through the Internet and applied it to their computer environment.

These computers or laptops can be used without system restrictions in using software codecs because of their high capacity and abundant system resources.

However, mobile environments, such as mobile phones or personal digital assistants (PDAs), are very different. This is because the systemic resource environment is significantly lower than that of the normal desktop environment. For example, a small amount of memory environment and a memory environment running in the O / S area.

Accordingly, it was almost impossible to watch videos through mobile terminals. Recently, however, due to the development of mobile technology, a mobile terminal capable of downloading and viewing various videos through the Internet has appeared. The mobile terminal has a built-in hardware codec that can restore the compressed video, and play the video restored by the codec.

As such, since video playback in a mobile environment is possible only in a limited mobile terminal, there is a cost problem of newly purchasing a separate mobile terminal with a built-in codec in order to view a video.

Therefore, it is impossible to watch videos on most mobile terminals currently in use without replacing the terminal. Accordingly, the development of a software codec suitable for the environment of a mobile terminal is urgently required.

The present invention has been made to solve the above problems, the present invention

The present invention relates to a video reproducing system capable of viewing a large amount of video files through a mobile terminal having a limited memory capacity, for example, a mobile phone or a personal portable terminal.

Furthermore, the present invention relates to a video playback system that plays video files even in a conventional mobile terminal without a codec.

The present invention also relates to a video playback system capable of playing back video files through an existing mobile phone without a media program.

The video playback system according to an aspect of the present invention for achieving the above object is to stream the video file to the mobile terminal in response to the video file transmission request input from the mobile terminal through a wireless network, the mobile terminal A video service server providing a corresponding codec file according to a codec request from the video service server; Requesting a video file to the video service server according to a user's operation signal, requesting a codec file to the server upon receiving video stream data from the server, and real-time video stream data using the codec file transmitted from the server. It is composed of a mobile terminal including a media playback unit to play with.

According to this aspect of the present invention, a video playback system according to the present invention transmits a video file in a real time based stream method in a video service server and simultaneously plays back files transmitted in a stream method according to a codec request from a mobile terminal. By providing a software codec to a user's mobile terminal, the function of the terminal can be expanded to play a huge amount of video files through a mobile terminal having a limited memory capacity, for example, a mobile phone or a personal portable terminal.

In particular, it is possible to play a large amount of MPEG / AVI video files even in the existing mobile terminal without the MPEG / AVI codec, mobile terminal users can watch a large amount of video through the existing mobile terminal, Without purchasing a dedicated mobile terminal for viewing video files, it is possible to watch various movies or music without restriction of place and time.

These and further auxiliary aspects of the present invention will become more apparent through the following preferred embodiments with reference to the accompanying drawings. Hereinafter, the present invention will be described in detail to enable those skilled in the art to easily understand and reproduce the present invention. In the following description of the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted.

1 schematically illustrates a network configuration of a video playback system according to a preferred embodiment of the present invention.

As shown in the figure, the video playback system according to the present invention includes a video service server 100, a swap gateway 220, a swap server 210, and mobile terminals 400, 401, and 402.

Wireless data communication terminals (400, 401, 402) used by users using the video playback system according to the present invention may include a mobile phone, a personal portable terminal, etc., which are equipped with a virtual machine, furthermore, data service through the wireless network 300 It encompasses any portable wireless data communication terminal capable of receiving and having computer computing capabilities.

On the other hand, the video playback system according to the present invention is based on the message transmitted to the terminal by the video service server 100, and does not require any special hardware or software on the terminal side. That is, the video playback system according to the present invention provides a video file and a codec file necessary for the playback of the video file in the video service server. Accordingly, it is possible to play MPEG / AVI compressed video files even in the existing mobile terminal without the MPEG / AVI codec.

In a preferred embodiment of the present invention, the video playback system includes a wireless communication server that supports interconnection with the wireless communication network 300. As shown in the figure, data communication between the mobile terminals 400, 401, 402 and the video service server 100 is implemented through a swap gateway 220 and a swap server 210 that are linked to the wireless communication network 300. Video playback system based on the swap server 210 is built.

In the embodiment of the present invention, the data communication between the mobile terminal (400, 401, 402) and the video service server 100 performs data communication with the mobile terminal through a wireless application protocol (Wireless Application Protocol), the above-described swap gateway and swap server Are idiomatic, detailed description thereof will be omitted.

Hereinafter, a video service server according to the present invention will be described with reference to FIG. 2.

As shown in FIG. 2, the video service server 100 according to the present invention includes a video index database 110, a video database 120, a codec server 130, a video processing unit 140, and a codec processing unit ( 150). And a player download processor 160 in accordance with an additional aspect of the present invention.

The video index database 110 stores location information of a plurality of video files. The video database 120 stores corresponding video files specified in the video index database 110.

The codec server 130 stores a codec for playing a video file stored in the video database 120. For example, an MPEG / AVI codec for decoding a video file compressed with MPEG / AVI is stored. In the embodiment of the present invention, the codec stored in the codec server is not limited thereto, and includes a codec corresponding to a compression algorithm of a video file.

On the other hand, the video processor 140, when a video file request from the mobile terminal, extracts the video file stored in the video database 120, and streams it and transmits it to the mobile terminal. That is, the video processor 140 searches for the video index database 110 when the video file request signal from the mobile terminal is received and extracts the video file stored in the video database 120. The extracted video file is transmitted to the mobile terminal. At this time, the transmission is performed by a stream method based on real time transmission. In a preferred embodiment of the present invention, the video file transmitted from the video server is a binary file consisting of binary codes.

The codec processor 150 is responsible for processing the codec file, and extracts the codec file stored in the codec server 130 according to a codec file request signal from the mobile terminal and transmits the codec file to the mobile terminal. At this time, the codec processing unit 120 converts and outputs the TCP socket method to enable data communication between the mobile terminal and the video service server.

Although the codec server 130 is illustrated as being located inside the video service server 100 in the embodiment of the present invention, the codec server 130 is not limited thereto and may be physically connected to the video service server and may be located outside the video service server. In this case, the codec processing unit 150 is located in the codec server 130.

The data processing process of the video service server having such a configuration will be described later.

According to this aspect of the present invention, a video playback system according to the present invention is a video service server in a video service server and various codecs for playing these files, such as MPEG / AVI codec for playing video or MP3 codec for playing sound, etc. By providing the same software codec to a user's mobile terminal, it is possible to play a large amount of video files transmitted from a video service server in real time even in a mobile computing environment, which is significantly lower than a desktop environment such as a mobile phone or a personal portable terminal.

According to an additional aspect of the present invention, the video service server 100 further includes a player download processor 160 for downloading a media player to play a video file. In an embodiment of the present invention, if there is no application for playing a video file by analyzing the terminal information received from the mobile terminal, the video service server 100 downloads the application to the mobile terminal through the player download processor 160. . As described above, the application downloaded to the mobile terminal includes location information of the codec file as well as a media application that plays a video file.

Accordingly, the video playback system according to the present invention provides a media application that plays a video file through a player download processor when the media player program does not exist in the mobile phone itself, thereby extending the scope of providing a video service. have. In addition, since the mobile terminal allows the user to watch the video in real time through the existing terminal, it is possible to reduce the economic burden of purchasing a separate dedicated terminal for watching the video.

3 is a block diagram schematically illustrating the configuration of a mobile terminal according to the present invention. As shown in the figure, these terminals 400, 401, 402 include a keyboard 410, which is an operation unit for inputting an operation command, and a display device 420 for displaying an operation state or selection data, for example, an organic EL or LCD display device. It includes. It also includes a voice output unit 440 for outputting a voice signal and a microphone related circuit for inputting voice in accordance with an advantageous aspect of the present invention. And a wireless communication unit 430 for transmitting and receiving data with the outside. In an embodiment of the present invention, the control unit 450 is commercially provided as a single integrated circuit. Commonly called MSM chips, these integrated circuits contain dedicated hardware to process communications, digital signal processors, and general purpose microprocessors.

Meanwhile, the media player 500 according to the characteristic aspect of the present invention is based on a virtual machine (hereinafter, referred to as "V / M") of a mobile communication terminal, for example, a Kilobyte Virtual Machine (KVM). Program code written in Java, for example, implemented in Java, which accesses a codec file stored in a codec property buffer through a codec interface, and a video stream received as a stream using a codec file accessed from the codec property buffer. The operation of restoring the data and restoring the image and the sound source frame are output from the liquid crystal display of the mobile communication terminal.

In the preferred embodiment, the elements constituting the media player are all implemented as program codes as described above, and are executed by a single microprocessor in the main control chip embedded in the mobile communication terminal.

Hereinafter, a media player according to an exemplary embodiment of the present invention will be described with reference to FIG. 4.

In this embodiment, the media player 500 processes the V / M memory unit 510, the stream detector 520, the codec property 530, the codec interface 540, and the video stream data. A central processing unit 550 and a display interface 570 for outputting the image and sound frame reconstructed through the central processing unit 550 to the display unit and the audio output unit.

The V / M memory unit 510 exists in a media player platform separately from a virtual machine (hereinafter, referred to as a "V / M") of a mobile terminal and includes various environmental information. For example, it stores the UEL information of the codec server where the codec file is located and various applications for executing the media. As described above, various applications stored in the V / M memory unit may be written in the Java language to expand the media player function and to add or delete a function of the media player suitable for the preference of the age group.

The stream detector 520 detects reception of stream binaries (hereinafter referred to as "stream data") received through the wireless communication unit of the mobile terminal. In the embodiment of the present invention, the stream detector 520 determines the video stream data through the header information included in the data input through the wireless communication unit.

Accordingly, the media reproducing unit is driven according to the detection signal of the stream detecting unit 520. That is, the media reproducing unit is driven by the moving picture stream data detection signal input from the stream detecting unit, and restores and outputs the input moving picture stream data. When the data for notifying the end of the stream data is input from the stream detector 520, the driving of the media player is terminated, and the codec file provided from the codec server is deleted.

The codec property 530 is an application program interface (API), which is a method defined by a mobile terminal operating system or another application to request processing from an operating system or another application. Method). In other words, codec properties are implemented by calling a function that provides a link to a specific subroutine for execution within a program.

In a preferred embodiment of the present invention, the codec property 530 requests a decoder codec file related to the video stream data by accessing the codec server through the wireless communication unit of the mobile terminal upon receiving the video stream data, and transmits the codec file transmitted from the codec server. Is temporarily stored, and includes a connection processor 531 and a property buffer 532.

The connection processor 531 requests a codec file that reproduces video stream data according to the detection signal of the stream detector 520. That is, the connection processor 531 refers to the location information of the codec file input from the V / M memory manager, which will be described later when receiving the video stream data from the outside, and automatically connects to the codec server where the corresponding codec file is stored, and corresponds to the codec server. Request a codec file.

The property buffer 532 temporarily stores the codec file downloaded through the connection processor 531.

As described above, the codec file stored in the property buffer 532 is written in C / C ++. The codec linking the codec method to the codec interface 540, which will be described later, will be linked to the codec method. It consists of a connection part.

In the embodiment of the present invention, the link unit is composed of a dynamic link library (hereinafter referred to as a "DLL") file which calls and executes a virtual codec method stored in the property buffer 532. The codec connection unit is formed of a class file for interfacing the dynamic link library file virtually linked through the link unit with the control unit.

The codec interface 540 according to the aspect of the present invention connects to communicate with the codec file stored in the codec property 530. In a preferred embodiment of the present invention, the codec interface 540 is formed of a Java language executed in J2ME (Java 2 Micro Edition) to communicate with the DLL file of the codec file as described above.

The media player according to the embodiment of the present invention is written in Java program code to be implemented on the V / M for the mobile communication terminal as described above, and the program code is generated in the mobile communication terminal through the J2ME (Java 2 Micro Edition) platform. It is implemented.

In an embodiment of the present invention, the J2ME platform runs on a Kilobyte Virtual Machine (KVM), and includes a class of classes based on CLDC (Connected Limited Configuration), a specification for KVM and a core API, a CLDC configuration, It includes the Mobile Information Device Profile (MIDP), the MIDP application, and the OEM classes and OEM applications for the standard API set. Since J2ME is a known technology before the filing date of the present application, a detailed description thereof will be omitted.

Accordingly, the media player 500 of the mobile terminal according to the present invention interfaces with the codec connector stored in the property buffer through the codec interface. The codec linker and the codec linker call the method function of the codec file to restore the received video stream data.

Meanwhile, according to a characteristic aspect of the present invention, the central processing unit 550 connects the codec property 530 to the codec server when receiving the video stream data, and obtains the received video stream data through the codec interface 540. The data is reconstructed for each data by using the first and second buffers in the frame memory 560, and the image and sound frames recorded in the frame memory 560 are output to the display interface 570.

In other words, in a preferred embodiment of the present invention, the central processing unit 550 includes a V / M memory management unit 551, a stream processing unit 552, and a display output control unit 553. And further includes a display drive controller 554 in accordance with an additional aspect of the present invention.

The V / M memory manager 551 manages the above-described V / M memory unit 510, and deletes, stores, and manages environmental information stored in the V / M memory unit. The V / M memory manager 551 extracts the location information of the codec file stored in the V / M memory unit 510 according to the detection signal of the stream detector 520 and outputs the location information to the codec property 530. Accordingly, the codec property 530 refers to the location information of the codec file input from the V / M memory manager 551 to automatically connect to the codec server in which the codec file is stored.

The stream processor 552 restores the video stream data input by the stream method for each data by using the codec file obtained through the codec interface 540 and buffers the data in the frame memory 560 which is a virtual memory.

In a preferred embodiment of the present invention, the stream processor 552 includes a resource extractor 552a, a video / sound separation processor 552b, and a data processor 552c.

The resource extracting unit 552a extracts a stream packet resource included in the video stream data. The image / sound source separation processor 552b separates the packet resource input from the resource extractor for each data. Accordingly, the video packet resource received by the stream method is divided into video and sound stream data.

The data processor 552c decodes the video and sound stream data separated by the video / source separation processor 522b using the video / audio decoder codec accessed through the codec interface 540, respectively. Buffer). In an embodiment of the present invention, the size of the frame memory 500 that is the virtual memory does not exceed 32K bits.

The process of stream processing as described above will be described in detail later in the media playback method.

In addition, according to an additional aspect of the present invention, the data processor 552c further includes a filter unit for removing unnecessary data included in each stream data when decoding the image and sound stream data. Accordingly, the media player 550 removes noise and null data included in the stream packet resource through the filter unit, thereby providing excellent image quality and sound quality during video playback.

The display output controller 553 outputs the image and sound frames buffered in the frame memory 560 to a display interface which will be described later. That is, the display output controller 553 outputs an image frame and a sound source frame stored in the frame memory to the display interface, which will be described later, whenever the buffered amount of the frame memory is buffered through the stream processor 552.

Meanwhile, according to a characteristic aspect of the present invention, the display interface 570 according to the present invention uses the liquid crystal display 420 and the audio of the image and sound source frames input from the frame memory 560 through the display output controller 553. As a means for outputting to the output unit 440, the image and sound frame received from the frame memory 560 is processed and output to be output from the display unit and the audio output unit.

In a preferred embodiment of the present invention, the display interface 570 includes an image / sound generator 571 and a video generator 572.

The image / sound generator 571 buffers the image frame and the sound source frame input from the frame memory 560 to the clip memory 580, and processes the image frame so that the image frame is output through the display unit 420 of the mobile terminal. do. The video generator 572 synchronizes the video and sound frames buffered in the clip memory 580 through the video / sound generator 571 to the display unit 420 and the audio output unit 440. At this time, the video generating unit 572 outputs the image data to the display unit in the 16-bit RGB data format.

Therefore, the mobile terminal according to the present invention can play the video stream data compressed by various algorithms through the media playback unit having the above configuration, so that the video file can be conveniently and real-time anytime and anywhere through the mobile terminal with limited memory capacity. It is possible to play.

In addition, when MPEG / AVI video files are input to an existing mobile phone that does not have an MPEG / AVI codec, a software codec that decodes the video is temporarily downloaded from a server and used to play a video file input from outside in real time.

Meanwhile, according to an additional aspect of the present invention, the video playback system according to the present invention includes a display unit 420 and a voice according to a user's operation signal input from the central processing unit 550 through an operation unit 410 of the mobile terminal (see FIG. The display driving controller 540 may further include a display driving controller 540 for controlling the image quality and the intensity of the sound source output through the output unit 440. The display interface 570 may generate a video according to a control signal of the display driving controller 540. The video control unit 573 further controls an image and a sound source output through the 572.

Accordingly, the media player according to the present invention can more clearly improve the image quality and sound quality of the image and sound output to the display unit and the audio output unit through the display driving controller 540, and can also implement a contrast, contrast adjustment function, and the like. . You can even include some simple filter functions to give you graphical effects.

Hereinafter, a data processing process in the video service server will be described with reference to FIG. 5.

5 is a flowchart illustrating a process of a video service server according to the present invention. As shown in FIG. 5, first, it is checked whether there is a video file request signal from the mobile terminal 400, 401, 402 of the user (S110). At this time, the video file request signal continuously performs step S110 when there is no request signal in step S110 included in the message received by the mobile terminal 400, 401, 402. However, if there is a request signal in step S110 enters the next step to receive and analyze the terminal information of the mobile terminal (400,401,402) (S120).

At this time, if the media service for playing the video file does not exist in the corresponding terminal as a result of analyzing the terminal information (S130), if there is no media player in the corresponding mobile terminal (400,401,402) through the player download processing unit 114 Download the application for playing the video file to the mobile terminal (S140). Accordingly, when the video file is transmitted, the mobile terminal refers to the location information (URL) of the codec file included in the downloaded application, accesses the codec server providing the codec file, and downloads the codec file from the server.

However, if there is a media player in the terminal (300,301,302) in step S130, the video service server refers to the video file position information included in the video file transmission request signal from the terminal analyzed in step S120 to the video database 120 The video file stored therein is extracted and transmitted to the mobile terminal 400, 401, 402 (S150). At this time, the transmission is performed in a stream method based on real time transmission, and the communication format is converted to enable data communication with the mobile terminal. The converted video stream data is transmitted to the mobile terminal through a wireless application protocol.

In operation S160, a signal for requesting a codec file is received from the mobile terminals 400, 401, and 402. The codec file is transmitted by referring to the location information of the codec file included in the request signal received in step S160 (S170). At this time, the transmission is performed by the TCP socket method, which is a download method, and the communication format is converted to enable data communication with the mobile terminal as in the video stream data. The converted codec file is transmitted to a mobile terminal through a wireless application protocol.

Meanwhile, a process of playing a video file transmitted from a video service server will be described below.

6 is a flowchart illustrating a media playback method according to an exemplary embodiment of the present invention. As shown in FIG. 6, the media player according to the present invention detects the reception of the video stream data through the stream detector 520 to the media player (S510). If the stream detection signal is input from the stream detector 520, the media player according to the present invention is driven. However, if the stream detection signal is not input from the stream detector 520, the flow returns to step S510.

When the stream detection signal is input in step S510, the media player acquires the codec file from the codec server in which the codec file is stored (S520). That is, the codec property connection processor 531 refers to the location information of the codec file stored in the V / M memory unit 510 and accesses the codec server in which the codec file is stored. The codec file is received from the codec server and temporarily stored in the property buffer 532.

On the other hand, after the step S520, by using the codec file stored in the property buffer 532, the video stream data received in a stream method is separated and restored for each data and buffered (S530).

That is, the stream packet resource is extracted from the video stream data received through the resource extraction unit 552a. Then, the stream data, which is the packet resource extracted through the video / sound source separation processor 522b, is separated for each data. Accordingly, the video stream and the sound source stream are separated. Null data, noise, and trouble data included in the separated stream data are removed through the filter unit.

The codec interface 540 accesses the codec file stored in the property buffer 532. That is, the codec interface calls a codec connection formed of a class file surrounding the codec file. The codec linker calls the codec linker composed of a dynamic link library file. The codec link section then accesses the codec methods that are virtually linked to the Dynamic Link Library file. Therefore, through such an access method, the media player accesses the codec file provided from the codec server to restore the compressed video stream data.

In this way, the media player accesses the codec file, decodes each stream data through the data processor 552c using a video decoder and an audio decoder, and buffers the stream data in the frame memory. That is, the data processing unit 552c decodes the image and sound source decoder codec accessed from the property buffer of the codec property, configures the image and sound dot frame units into respective frames, and then allocates them to the frame memory 560 which is the virtual memory. Buffer each of the allocated regions.

At this time, the data processor 523 removes unnecessary data included in each stream data through the filter unit when decoding the video and sound stream data. Accordingly, by eliminating null data or noise included in the stream data, it is possible to provide excellent image quality and sound quality during video reproduction.

When the image and sound frame decoded through the data processor are filled to a predetermined size in the frame memory, the display output controller 553 outputs the image and sound frame stored in the frame memory to the display interface (S540). At this time, each frame stored in the frame memory is erased, and each image and sound frame processed by the data processor is stored again.

The image and sound frame input from the frame memory 560 is processed and buffered through the display interface 570, and is output to the liquid crystal display 420 and the audio output unit 440 of the mobile terminal (S540). Because the video and sound frames input from the frame memory are source codes composed of C / C ++, the video and sound frames must be processed to be used by the LCD UI of the media player according to the present invention written in Java.

Accordingly, according to a characteristic aspect of the present invention, the media playback method according to the present invention uses a J2ME method using J2ME, for example, a CreationImage method to uniformly reduce the size of an image frame input from a frame memory, thereby providing a clip as a virtual memory. Buffer the memory 800. The video and sound frames buffered through the video generator 572 are synchronized and output to the display unit 420 and the audio output unit 440 of the mobile terminal.

As described in detail above, the video playback system according to the present invention is a software that transmits a video file by a video service server in a real-time based stream method and simultaneously plays files transmitted in a stream method according to a codec request from a mobile terminal. By providing a codec to a user's mobile terminal, it is possible to play and view a compressed video file through a compression algorithm through a mobile terminal having a limited memory capacity, for example, a mobile phone or a personal portable terminal.

In particular, it is possible to play a large amount of MPEG / AVI video files even in the existing mobile terminal without the MPEG / AVI codec, mobile terminal users can watch a large amount of video through the existing mobile terminal, Without purchasing a dedicated mobile terminal for viewing video files, it is possible to watch various movies or music without restriction of place and time.

In addition, when there is no media player program in the mobile phone itself, there is an advantage of expanding the scope of providing a video service by providing a media application that plays a video file through a player download processor. In addition, since the mobile terminal allows the user to watch the video in real time through the existing terminal, it is possible to reduce the economic burden of purchasing a separate dedicated terminal for watching the video.

Although the present invention has been described with reference to the accompanying drawings, it will be apparent to those skilled in the art that many different and obvious modifications are possible without departing from the scope of the invention from this description. Therefore, the scope of the invention should be construed by the claims described to include many such variations.

1 is a diagram schematically illustrating a network configuration of a video playback system according to a preferred embodiment of the present invention.

Figure 2 is a block diagram schematically showing the configuration of a video service server according to an embodiment of the present invention.

Figure 3 is a block diagram schematically showing the configuration of a mobile terminal according to a preferred embodiment of the present invention.

4 is a block diagram schematically showing the configuration of a media player according to a preferred embodiment of the present invention.

5 is a flowchart illustrating a process of a video service server according to the present invention.

6 is a flowchart illustrating a playback process of a media player in a mobile terminal according to the present invention.

<Description of the symbols for the main parts of the drawings>

100: video service server

110: video index database 120: video database

130: codec server 140: video processing unit

150: codec processing unit 160: player download processing unit

210: swap server 220: swap gateway

300: wireless communication network

400,401,402: wireless terminal

410: operation unit 420: display unit

430: wireless communication unit 440: voice output unit

450: control unit

500: media playback unit

510: V / M memory unit 520: stream detection unit

530: codec properties 540: codec interface

550: central processing unit 560: frame memory

570: display interface 580: clip memory

Claims (14)

A video service server that streams the video file to the mobile terminal according to a video file transmission request input from the mobile terminal through a wireless network, and provides the codec file according to the codec request from the mobile terminal; Requesting a video file to the video service server according to a user's operation signal, requesting a codec file to the server upon receiving video stream data from the server, and real-time video stream data using the codec file transmitted from the server. A mobile terminal including a media player for playing with; Video playback system comprising a. The video service server of claim 1, wherein the video service server comprises: A video index database that stores location information for multiple video files, A video database for storing corresponding video files specified in the video index database; A codec server for storing codecs for playing video files, A video processing unit which extracts the corresponding video file stored in the video database by referring to the location information of the video file included in the video file request signal, and streams the video file; And extracting a codec file stored in the codec server in accordance with the codec file request signal and transmitting the extracted codec file to the mobile terminal, converting the data into a TCP socket so as to enable data communication with the mobile terminal. Video playback system. The video service server of claim 2, wherein the video service server comprises: And a player download processing unit for downloading the application to the mobile terminal when there is no application for analyzing the terminal information transmitted from the mobile terminal to play the video file. The method of claim 5, wherein the application is: And a media environment information including location information of a server where the media player program and codec file are located. The method of claim 1, The communication service between the video service server and the mobile terminal is performed through a wireless application protocol. The apparatus of claim 1, wherein the media player comprises: A V / M memory unit for storing environment information including location information of the codec file; A stream detector for detecting reception of video stream data transmitted from the video service server in a stream manner; A codec property for requesting a codec file for reproducing moving picture stream data to the codec server according to a detection signal of the stream detector, and temporarily storing the codec file transmitted from the codec server; A codec interface to connect with a codec file stored in the codec property; When the video stream data is received, the codec property is connected to the codec server, and the received video stream data is restored for each data using a codec file obtained through the codec interface, buffered in a frame memory, and recorded in the frame memory. A central processing unit for outputting a sound source frame to a display interface; A display interface for processing and outputting the image and sound frame received from the central processing unit to be output from the display unit and the audio output unit; Video playback system comprising a. The method of claim 6, wherein the central processing unit: A V / M memory manager for managing the V / M memory unit and extracting location information of a codec file stored in the V / M memory unit according to a detection signal of the stream detector and outputting the codec property as a codec property; A stream processing unit for restoring video stream data for each data using the codec file obtained through the codec interface and buffering the data in the frame memory; And a display output controller configured to output an image and a sound source frame buffered in the frame memory to the display interface. The method of claim 7, wherein the stream processing unit: A resource extraction unit for extracting stream packet resources included in the video stream data; An image / sound source separation processing unit for separating the packet resource input from the resource extraction unit for each data; And a data processor configured to decode the image and sound stream data separated by the image / sound source separation processor using a video / audio decoder accessed through the codec interface and buffer them in the frame memory. . The method of claim 8, wherein the data processing unit: And a filter unit which removes unnecessary information including null data included in the video and sound source stream data during decoding. 8. The method of claim 7, wherein the codec property is: A connection processing unit which accesses a server by referring to location information of a codec file input from the V / M memory management unit and requests a codec file from the server; And a property buffer for temporarily storing the codec file received through the connection processor. The method of claim 10, wherein the codec file is: A link unit comprising a dynamic link library file for calling and linking a codec method stored in the property buffer; And a codec linking unit formed of a class file for interfacing a dynamic link library file virtually linked through the linking unit with the control unit. 12. The method of claim 11, wherein the codec interface is: And a Java 2 Micro Edition (J2ME) to communicate with a Dynamic Link Library (Dynamic Link Library) file of the codec file. The method of claim 6, wherein the display interface is: An image / sound generator for buffering an image frame and a sound source frame input from a frame memory to a clip memory through the display output control unit, and processing the image frame so that the image frame is output through a display unit of a mobile terminal; And a video generator for synchronizing the video and sound frames buffered in the clip memory through the video / sound generator and outputting the video and sound frames to the display unit and the audio output unit. The method of claim 13, The central processing unit further includes a display driving control unit for controlling the image quality and the intensity of the sound source output through the display unit and the audio output unit according to the operation signal input through the operation unit of the mobile terminal, And a video controller configured to adjust an image and a sound source output through the video generator according to a control signal of the display driving controller.