KR100853676B1 - Mheg file storage/retrieval method and apparatus for digital broadcasting receiver - Google Patents

Abstract

The present invention relates to a method and apparatus for storing / playing MHEG files in a digital broadcasting receiver. In particular, when storing MHEG content files, application objects and scene objects are classified and stored in a file unit and stored in a local storage medium. The purpose is to register information and display a list of storage files of a local storage medium when a MHEG content file is played, so that a viewer can play a desired file. The present invention for this purpose is to directly store the file and its file information together when it is confirmed as an application object when the command to save the MHEG content file is input, and check whether it is a file branched from the application object when confirmed as a scene object file from the application object If the file is identified as a branched file, storing the application file and the corresponding scene file along with the file information, retrieving the stored file information to display a list of files stored in the local storage medium, and displaying the displayed file list. When one of the playback commands is selected and the playback command is input, if it is confirmed as an application object or a scene object, the playback is performed by the MHEG decoding process. When the file is identified as a scene file branched from the application object, the application object is launched (l and playing back the corresponding Scene object according to the MHEG decoding process after the aunching).

Description

MHEEG FILE STORAGE / RETRIEVAL METHOD AND APPARATUS FOR DIGITAL BROADCASTING RECEIVER}

1 is a signal flow diagram showing a conventional MHEG engine starting process.

Figure 2 is an exemplary view showing a MHEG content file storage list in an embodiment of the present invention.

3 is an operational flowchart for storing an MHEG content file in an embodiment of the present invention.

4 is an operational flowchart for playing an MHEG content file in an embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to digital broadcast receivers, and more particularly, to a method and apparatus for storing / reproducing MHEG files.

In general, a digital broadcast receiver can start the MHEG-5 engine as a means for recognizing and displaying the presence of MHEG content from a transport stream (TS) as a digital video broadcasting project (DVB). ) And the UK DTT Profile Version1.

The MHEG-5 engine extracts content to be used by the engine, that is, a multimedia and hypermedia information coding Experts Group (MHEG) file from a transport stream (TS) currently being broadcast, that is, transmitted from a broadcasting station, and then viewed by a viewer. This function converts the data into a TV and displays it on the TV screen.

At this time, the digital broadcast receiver searches for a table such as a program association table (PAT) and a program map table (PMT) and finds data_broadcast_id_descriptor as shown in the signal flow diagram of FIG. 1 to indicate an MHEG application. Auto_Boot application recognition step that finds boot_PID, and finds carousel_id by using boot_PID obtained in the above step, and obtains service gateway object from module through standard DSI-DII mechanism. Automated acquiring the name of the initial file object through the acquisition step and the service gateway message included in the service gateway object obtained in the step, and extracting the actual file object from the module through the standard DSI-DII mechanism. Boot object 3 executes the process of the benefit phase.

Accordingly, in order to store the MHEG content extracted based on the above process, the digital broadcasting receiver transports a MHEG program to which the MHEG content belongs, together with SI (Service Information) data such as PMT and PAT table. Store in local storage unit.

Subsequently, when the MHEG content stored in the local storage device is played, the MHEG content is played by starting the MHEG-5 engine by executing the above-described process after receiving the corresponding transport stream from the local storage device.

However, the conventional method described above is required to store the data including various additional information in storing the MHEG content, thereby avoiding unnecessary overhead caused by this, and consequently the digital broadcast receiver. It is virtually impossible to store MHEG content and play back that MHEG file from a stored transport stream unless it has the capability to connect a large storage device such as a hard disk drive and its output to the input of a receiver such as a demultiplexer. Has the disadvantage.

In addition, the conventional method makes it impossible for a viewer to check what MHEG content files are stored in his or her digital broadcast receiver. Therefore, in order to view desired content, the MHEG files are searched from the first object file until the corresponding content appears. There is a hassle.

Accordingly, in order to alleviate the above disadvantages, the digital broadcast receiver recognizes the presence of the MHEG content in a normal situation in which a transport stream is received, starts the engine, displays the viewer by booting up, and stores various kinds of internal storage. There is a need for a method of storing MHEG content in file units and retrieving it if necessary.

Accordingly, in order to improve the disadvantages of the related art, the present invention distinguishes an application object and a scene object when storing an MHEG content file, stores the file object on a local storage medium in file units, registers the stored file information, and reproduces the local file when playing the MHEG content file. An object of the present invention is to provide a method and apparatus for storing / playing MHEG content of a digital broadcasting receiver, which displays a list of storage files of a storage medium so that a viewer can play a desired file.

In order to achieve the above object, the present invention, if a save command of an MHEG content file is input, directly checks that the file and its file information together when it is identified as an application object, and checks whether the file is a branched file from the application object when it is confirmed as a scene object file. If it is confirmed as a branched file from the application object, storing the application file and the corresponding scene file together with the file information, searching for the stored file information, and displaying a list of files stored in the local storage medium; If the playback command is input by selecting one of the file list shown in, playback is performed by MHEG decoding process when it is confirmed as an application object or scene object, and when the file is confirmed as a scene file branched from the application object, Then (launching) launching the agent is characterized in that performing the procedure for reproducing the objects according to the Scene In the MHEG decoding process.

In order to achieve the above object, the present invention also provides a storage means for dividing the MHEG content currently in the active state into an application object and a scene object and storing the information in MHEG content files stored in the storage means. A data structure for displaying, a display means for displaying a list in the data structure, and reproducing means for reproducing MHEG content stored separately for each object, wherein the reproducing means includes a list of files displayed through the display means. If a play command is input for the selected list, the play operation of the corresponding file is automatically performed.

Hereinafter, the present invention will be described in detail with reference to the drawings.

A method of storing an MHEG file in an internal storage medium in a digital broadcast receiver for an embodiment of the present invention is performed in the same process as the flowchart of FIG. 3.

When the viewer enters a save command for the MHEG content that is currently being viewed through the interface with the receiver, the MHEG engine is responsible for whether the file to be saved belongs to an application object or to a Scene object from the two group objects defined in MHEG. Judge.

If the file to be stored above belongs to an application object, save the file directly to a nonvolatile storage medium such as NVM and Flash ROM, and the directory path, file name, and the fact that the file belongs to the application object. Write information such as file size and file pointer to the data structure and exit.

Conversely, if the file to be stored above belongs to a scene object, first, it is checked whether the scene object is first branched from an application object or an object branched from another scene object.

At this time, when it is confirmed that the scene object branched first from the application object, the application object file branching the scene object is stored together with the corresponding scene object file, and the data structure for file management includes the application file together with information about the scene object file. Information about is also recorded.

If the file belonging to the scene object is a file branched from a scene object instead of the scene object file first branched from the application object, only the scene file is stored and information about the file (the scene to which the file belongs) is stored in the data structure. Object, file name, file size, and file start location), then exit.

That is, in the embodiment of the present invention, since the MHEG content is stored in file units, the MHEG content can be easily stored even without a large storage medium.

Since the data structures recorded in the above process are interconnected in the form of a list, the viewer can manage the search, addition and deletion, and also display the contents of the list on a screen of a separate display means. .

The list of MHEG content files displayed on the screen of the display means is as shown in FIG.

Meanwhile, in the embodiment of the present invention, the method of reproducing the MHEG content file stored by the above process through the MHEG engine proceeds in the same process as the flowchart of FIG. 4.

First, when a viewer selects a file from the list of data structures displayed on the screen of the display unit and requests playback or display, the MHEG engine searches for a data structure managed by the viewer and the file is stored in an internal local storage medium. Find out if it exists in.

If the file does not exist in the local storage medium, the MHEG engine terminates the processing because the playback or display operation is no longer performed.

If the file exists in the local storage medium, the MHEG engine searches and checks the data structure containing the information about each file whether the file belongs to an application object or a scene object.

Accordingly, when the file is an application object, the MHEG engine displays the MHEG content on the screen of the display means through the MHEG decoding process.

If the file belongs to a scene object, the MHEG engine searches the data structure to determine whether the file belonging to that scene object is the first branched object from an application object or an branched object from another scene object.

At this time, if the file belonging to the scene object is a scene object first branched from the application object, the MHEG engine checks the information about the application object file that branched the scene object from the data structure, launches the corresponding application object, and then decodes the MHEG decoding process. The scene object is then played back and displayed on the screen of the display means.

The reason why the application object is launched first and then the Scene object is reproduced by the MHEG process is to minimize the possibility of an error by making the playback process of the MHEG content stored in the local storage medium as close as possible to the normal booting sequence.

If the file belonging to the scene object is not a scene object file first branched from the application object, the MHEG engine reproduces the corresponding scene file in the MHEG decoding process and displays it on the screen of the display means.

Therefore, in the embodiment of the present invention, the application object or the scene object is delivered directly to the MHEG engine in the form of an MHEG file in the process of playing the MHEG content stored in the local storage medium as described above. It is possible to start the MHEG engine even without it.

As described in detail above, the present invention stores MHEG content on a file basis, so that MHEG content can be easily stored even without a large storage medium.

In addition, the present invention can be applied to fields such as a personal video recorder (PVR) to achieve an effect that can be easily played back MHEG content stored in the receiver without going through the existing application recognition and booting process. .

In addition, the present invention has the effect of allowing the user to easily identify and play the contents of the MHEG content currently stored through means for displaying a list of the MHEG content currently stored.

Claims (7)

Determining whether an MHEG content file to be stored belongs to an application object or a scene object; Storing the corresponding file to be stored and file information of the corresponding file when it is determined as belonging to an application object as a result of the determination; If it is determined that the object belongs to a scene object, determining whether the file is a branch filed from an application object; Storing file information of a corresponding application file, the scene object file, and the scene object file when it is determined that the file is branched from the application object; And if it is determined that the file is not a file branched from the application object, storing the scene object file and file information of the scene object file. The method of claim 1, further comprising displaying a list of files stored in a local storage medium by using the file information. A first step of dividing an application object and a scene object and storing the file information of the stored file while storing an MHEG content file in a file unit; A second step of displaying a list of files stored in a local storage medium using the stored file information; A third step of discriminating an application object and a scene object from the stored file information when the MHEG content file is played and displaying it on the screen by MHEG decoding; The third step, And a play command for a file selected from a list of files displayed in the second step is automatically performed to play a corresponding file. The method of claim 3, wherein the first step, A first step of determining whether the MHEG content file to be stored belongs to an application object or a scene object; A second process of storing the corresponding file to be stored and file information of the corresponding file when it is determined that the first process belongs to an application object; A third step of confirming whether the file branched from the application object is determined as belonging to a scene object as a result of the determination of the first step; A fourth step of storing file information of a corresponding application file, the scene object file, and the scene object file when it is confirmed as a file branched from an application object as a result of the checking of the third step; And a fifth process of storing the scene object file and file information of the corresponding scene object file when it is determined that the file is not a branched file from the application object. How to save / play MPH file. delete The method of claim 3, wherein the third step, A first step of checking whether the MHEG content file to be played belongs to an application object or a scene object; A second step of displaying the corresponding file to be played on the screen through MHEG decoding when it is confirmed that the first object is an application object; A third step of confirming whether the file is a branch filed from the application object when it is confirmed as a scene object as a result of the checking of the first step; A fourth step of launching the corresponding application object and displaying the Scene object file on the screen through MHEG decoding when it is confirmed that the file is branched from the application object as a result of the checking of the third process; And a fifth process of displaying the scene object file on the screen through MHEG decoding if it is determined that the file is not a branched file from an application object as a result of the checking of the third process. How to save / play. Storage means for dividing the MHEG content currently in an active state into an application object and a scene object and storing the file in units of files; A data structure for storing information of the MHEG content file stored in the storage means; Display means for displaying a list in the data structure; Reproducing means for reproducing the stored MHEG content divided by the object, The regeneration means, And a playback command for a file selected from a list of files displayed through the display means, to automatically play a corresponding file.

Images