KR20090011315A - Digital multimedia file combined with locking control element and player element and method for the playback of the same - Google Patents

Abstract

A digital multimedia file combined with lock control element and player element and a playback method thereof are provided to ensure the optimum reproduction of contents through the structure in which a header, a player element, a control element and a digital multimedia element are arranged in sequence. A digital multimedia file combined with lock control element and player element comprises a digital multimedia element(100) in which digital multimedia data are compressed, a player element(200) including implementation data for performing the reproduction of the multimedia data, a control element(300) including at least data indicating the arrangement of the digital multimedia element and the player element in the file and lock data for controlling the locking of the digital multimedia data, and a header(400) keeping the file information.

Description

DIGITAL MULTIMEDIA FILE COMBINED WITH LOCKING CONTROL ELEMENT AND PLAYER ELEMENT AND METHOD FOR THE PLAYBACK OF THE SAME}

1 is a diagram illustrating the basic structure of a digital multimedia file capable of playing the digital multimedia data and self-playing according to the present invention.

2 is a view showing a process of producing a digital multimedia file of the present invention.

3 is a block diagram illustrating a specific example of data (or control data) belonging to the control element 300.

4 is a flowchart illustrating a preferred embodiment of the method of playing a digital multimedia file according to the present invention.

5 is a flowchart illustrating a more preferred embodiment of the method of playing a digital multimedia file according to the present invention.

The present invention relates to a novel digital multimedia file and a playback method thereof. More specifically, the present invention relates to a digital content file combined with a key control element and a player element, and a method of playing the same.

The convergence triggered by digital technology is now bringing about a major change in the media and telecommunications environment. This is the driving force to enable the ubiquitous environment, which enables the so-called 'convenient and economical communication through any media, anytime, anywhere, any device.' Accordingly, digital convergence has become an important topic in our society. This digital convergence is believed to bring about many changes in the media and telecommunications environment.

Due to the digital convergence, DMB receivers, MP3 players and car navigators are also equipped with digital multimedia playback functions. As various mobile multimedia devices have emerged, standardization of multimedia files played on these devices is being pushed by several groups. However, due to the interest of companies belonging to the standardization group, the standardization work is delayed. Therefore, a specific multimedia file produced by a company belonging to a specific standardization group is played only on a mobile multimedia device that complies with the standard.

For example, video and audio information is implemented in files such as audio video interleaving (AVI), Apple's Quick Time, and IBM's digital video media control interface (DVMCI). Although AVI files are most commonly used for multimedia playback, content providers use different programs to perform compression. Therefore, in order to play the multimedia file, a program that can decompress the compression is required. This is a major factor limiting the versatility of multimedia files and hinders the rational use of digital multimedia files.

On the other hand, one of the most important issues in digital multimedia files is the technology for rational control of illegal content use. As a conventional technique employed for copying a digital multimedia file, limiting the effective number of times of reproduction, and copyright protection, a streaming reproduction method is used. These streaming playback methods require a play-only flare for playing digital multimedia files, and the player receives the packet streams received through the RTP (realtime transport protocol) over UDP (user datagram protocol) into the buffer, and then repeats the process of deleting them. By doing so, do not store the multimedia file on the device after playback ends. However, this method is not available for mobile multimedia devices.

SUMMARY OF THE INVENTION An object of the present invention is to provide a digital multimedia file and a method of playing the same, which are compatible with various mobile multimedia devices.

Another object of the present invention is to provide a digital multimedia file and a method of playing the same, which can ensure compatibility in a mobile multimedia device and rational use of the digital multimedia file.

According to the present invention, a digital multimedia file and a method of playing the same are combined with a player element and a time control element for ensuring rational use of the digital multimedia file to ensure compatibility in a mobile multimedia device.

According to a preferred embodiment of the invention, i) a digital multimedia element having digital multimedia data compressed therein; ii) a player element comprising execution data for performing the reproduction of the multimedia data; iii) the digital multimedia element and the player. A digital multimedia file is provided that includes data indicative of an arrangement within a file of an element and a control element that includes at least key data for controlling the key of the digital multimedia data. Here, the finally obtained digital multimedia file is implemented as an executable file (* .exe). Thus, even if no player program is provided in the mobile multimedia device, the digital multimedia file can be executed independently (or by itself). In addition, the digital multimedia file ensures the rational use of the multimedia file by the key data contained in the control element.

According to another preferred embodiment of the present invention, a digital multimedia file is provided, wherein the arrangement structure of the digital multimedia file has a sequence of a player element, a control element and a digital multimedia element. In a mobile multimedia device, execution data contained in a player element is loaded into a memory, and data contained in a control element and a digital multimedia element are sequentially accessed under the control of the execution data.

 According to another preferred embodiment of the present invention, the control element comprises the size data of the player element, the size data of the digital multimedia element, the size data of the control element, and the key data indicating the effective number of playbacks , Digital multimedia files are provided.

 According to another preferred embodiment of the present invention, the control element further comprises one or both of the handle key data for scrambling / descrambling of the multimedia data and the time reflectance ratio data for counting the effective play count. Including, a digital multimedia file is provided.

 According to another preferred embodiment of the present invention, there is provided a digital multimedia file, wherein the control element further comprises codec data indicating a compression scheme of the digital multimedia data contained in the digital multimedia element.

 According to another preferred embodiment of the invention, (a) when the digital multimedia file according to any one of claims 1 to 5 is played on a digital multimedia device, the execution contained in the player element of the digital multimedia file Loading the data into the memory, (b) analyzing the data contained in the control element of the digital multimedia file, under the control of the execution data contained in the player element, and (c) the control in step (b) On the basis of the data contained in the element, the method of playing the digital multimedia without the assistance of a player program embedded in the mobile multimedia device, comprising the step of accessing the digital multimedia element compressed digital multimedia data and playing the corresponding digital multimedia. This is provided.

According to a more preferred embodiment of the present invention, there is provided a method of playing digital multimedia, wherein data contained in the digital multimedia element is accessed by disk access or file access by the execution data without being loaded into a memory. .

According to a further preferred embodiment of the present invention, a method for playing digital multimedia is provided, wherein data contained in the control element is accessed by disk access or file access by the execution data without being loaded into a memory.

1 is a diagram illustrating the basic structure of a digital multimedia file capable of playing the digital multimedia data and self-playing according to the present invention. As shown in FIG. 1, the digital multimedia file 1 according to the present invention comprises a digital multimedia element 100, a player element 200, a control element 300 and a header 400. In the digital multimedia element 100, digital multimedia data which is a combination of audio data and video data to be reproduced is compressed.

The player element 200 includes execution data for reproducing digital multimedia data included in the digital multimedia element 100. The execution data is a dedicated player of the digital multimedia data. For example, when the multimedia data is an AVI format (audio video interleaving file), the player element 200 includes a dedicated player for playing the AVI data. Execution data included in the player element 200 is loaded into the memory of the mobile multimedia device and acts as an executable file.

The control element 300 includes at least data indicating the arrangement in the file of the digital multimedia element 100 and the player element 200 and time data for controlling the time of the digital multimedia data 100. do. Specifically, the arrangement in the file of the digital multimedia element 100 and the player element 200 includes the size data of the player element 200, the size data of the digital multimedia element 100, and the control element 300. It can be confirmed from the size data of. In addition, the event of the digital multimedia content included in the digital multimedia element 100 may be confirmed from the event data indicating the effective number of reproductions. The effective number of plays means the number of times that the digital multimedia data can be played. For example, when the effective playback frequency is 5, the digital multimedia file can be played 5 times. In addition to these, the control element 300 may further include various variables or playback information. For example, the control element 300 preferably further includes handle key data for scrambling / descrambling the multimedia data. Based on the handle key data, scrambling / descrambling of the digital multimedia data included in the digital multimedia element 100 is performed. According to a more preferred embodiment of the present invention, the control element 300 further includes time reflectance ratio data for counting the effective number of refreshes. The time reflecting ratio data refers to a rate of reducing the effective playback frequency of the multimedia content when the multimedia content is played over a predetermined amount. For example, when the time reflecting ratio is 90%, when the digital multimedia data is reproduced in excess of 90%, the effective reproduction frequency is reduced by one. Except when the compression scheme is standardized and only a specific compression scheme is used, the control element 300 further includes codec data indicating a compression scheme of the digital multimedia data included in the digital multimedia element 100. The header 400 contains typical file information for the execution of the digital multimedia file 1.

One of the most important features of the present invention is the digital multimedia file 1 comprising the digital multimedia element 100, the player element 200, the control element 300 and the header 400. It is combined as an execution file. Thus, when the digital multimedia file 1 is driven in the mobile multimedia device, it is an executable file, which is executed by itself or independently without the help of the player program of the mobile multimedia device. As illustrated in FIG. 1, the digital multimedia file 100 is preferably arranged in the order of the header 400, the player element 200, the control element 300, and the digital multimedia element 100. This arrangement provides the advantage of achieving optimized playback of the digital multimedia file 10.

Another important feature of the features according to the invention is that the data contained in the digital multimedia element 200 is not loaded into the memory, but by disk data or file access by executable data belonging to the player element 200. Is approached by This provides the advantage of achieving the playback of the multimedia file while minimizing the memory load of the mobile multimedia device. The data belonging to the control element 300 may also be accessed by disk access or file access by execution data belonging to the player element 200.

FIG. 2 is a diagram illustrating a process of manufacturing the digital multimedia file 1 of FIG. 1. As shown in Fig. 2, the digital multimedia file 1 is a combination of a player executable file 2 and a multimedia file 3, and control data 4 including attribute values, time data, and the like contained therein. It is obtained by the addition of. First, execution data included in the existing player executable file 2 is extracted and added to the player element 200 of the digital multimedia file 1. Then, the digital multimedia data contained in the multimedia file 3 is extracted and added to the digital multimedia element 100 of the digital multimedia file 1. Control data 4 such as attribute values and time data included in the player executable file 2 and the multimedia file 3 are added to the control element 200 of the digital multimedia file 1, and the file information is stored in the header ( By insertion into 400, the finally combined digital multimedia file 1 is obtained. At this time, the control element 300 is added to the end of the player element 200, followed by the control element 300, the digital multimedia element 100 is located. At this time, the digital multimedia file 1 is generated by a combine tool 5. The digital multimedia file 1 finally generated is an executable file (for example, combined player.exe) as described above, and is executed on the platform of the mobile multimedia without the help of the player program of the mobile multimedia device. By this independent execution, the execution data of the player element 200 is loaded into the memory of the mobile multimedia device. By loading execution data of the player element 200, data belonging to the control element 300 and digital multimedia data belonging to the digital multimedia element 100 are accessed by disk access or file access.

 3 is a block diagram illustrating a specific example of data (or control data) belonging to the control element 300. As shown in FIG. 3, the control element 300 comprises a size 301 of a player element, a size 302 of a control element, a size 303 of a digital multimedia element and time data 304. According to a more preferred embodiment of the invention, the handle key 305 and / or the time reflectance 306 of the digital multimedia data is further included in the control element 300. In addition to these, the codec data 307, the resolution 308 of the digital multimedia data, the Frams per second (FPS) 309 of the digital multimedia data, and / or the total playing time 310 indicating the total running time of the multimedia data, etc. It is good to include additional. These control elements 300 may be implemented in the form of text with binary data or special characters as delimiters.

2 and 3, the creation of the digital multimedia file 1 by the combining tool 5 will be described in detail. First, the combining tool 5 extracts the data portions of the dedicated player executable (player.exe) 2 and the multimedia file 3 and inserts them into the player element 200 and the digital multimedia element 100, respectively. . The attribute values are extracted and added to the control element 300. Here, the digital multimedia data may be inserted into the digital multimedia element after modulating the digital multimedia data by using the handle key of the control element 300. This process can be replaced or combined with DRM or encryption process. Examples of attribute values are the size of the player element, the size of the digital multimedia element, the codec data, the resolution of the digital multimedia data, the frames per second (FPS) and / or the total playback time of the digital multimedia data. Other variables of the control element 200, such as key data, handle keys and key reflectance, are externally input. The combining tool 5 then combines the control element 200 between the player element 200 and the digital multimedia element 300, and the player element 200, the control element 300 and the digital multiplayer. Based on the meyer element 100, the header 100 information is updated, and finally the digital multimedia file 1 is generated.

4 is a flowchart illustrating a preferred embodiment of the method of playing a digital multimedia file according to the present invention. As shown in FIG. 4, when the digital multimedia file is executed in the mobile multimedia device (S101), execution data included in the player element of the digital multimedia file is loaded into the memory (S102). By normal loading of the execution data included in the player element, the control element belonging to the +1 point of the player element is accessed in a disk access (or file access) manner (S103). In order to reduce the load on the memory, the data contained in the control element is not loaded into the memory. Control data included in the control element is analyzed (S104). As shown in FIG. 3, the size of the player element, the size of the control element, the size of the digital multimedia element, the key data, the handle key of the digital multimedia data, the key reflectance ratio, the codec data, the resolution of the digital multimedia data, as shown in FIG. 3. , FPS and / or total playback time of digital multimedia data. These control data are information required for reproduction of digital multimedia elements and information required for timeliness. For example, the data contained in the digital multimedia element is accessed only when the time data E has a value greater than "0". If the key data E is greater than " 0 " (S105), the data contained in the digital multimedia element is accessed. At this time, access to the digital multimedia element is performed by a value obtained through analysis of the control data. Specifically, digital multimedia data starting at the point of A + B + 1 is added by adding 1 to the sum of the size A of the player element and the size B of the control element (S106). In this case, the digital multimedia data is particularly preferably accessed by a disk access (or file access) method without being loaded into the memory. This significantly reduces the load on the memory. Recovery of the digital multimedia data is performed using the handle key which is one of the control data, and reproduction of the digital multimedia data is performed (S107). At this time, according to a preferred embodiment of the present invention, the playback progress of the digital multimedia data is confirmed (S108). When the reproduction ratio (eg, reproduction time / total reproduction time) of the digital multimedia data exceeds the time reflection ratio (S109), the value of the time data of the control element is reduced by one (S110). When the reproduction of the multimedia is completed, the digital multimedia file is inactivated (S111).

FIG. 5 is a flowchart illustrating a more preferred embodiment of the method for reproducing a digital multimedia file according to the present invention. When the key data E reaches "0", the digital multimedia file itself is corrupted. To illustrate. Steps S201 to S211 are the same as those described in FIG. When the key data E reaches " 0 " (S212), self destruction of the digital multimedia file is performed (S213). For example, the data contained in the player element and / or the digital multimedia element may destroy itself. Preferably, the execution data contained in the player element is corrupted. According to the most preferred embodiment of the present invention, the player element includes a function of accessing data included in the control element and the digital multimedia element, and the execution data when the key data included in the control element has "0". Has the function of self damaging at least part or all of it.

The digital multimedia file according to the present invention has a structure in which digital multimedia content and a player are fused with each other. Therefore, the digital multimedia file according to the present invention ensures content compatibility between mobile multimedia terminals. Furthermore, the digital multimedia file according to the present invention has a structure in which the digital multimedia file is fused with digital multimedia content, a playback player thereof, and control elements for ensuring the rational use and reproduction of the digital multimedia content. This ensures rational use of the multimedia content. Furthermore, by the addition of the control element, the digital multimedia content is accessed by disk access or file access without being loaded into the memory. This saves the memory load. In addition, the arrangement of the header, the player element, the control element, and the digital multimedia element in order ensures optimized playback of the multimedia content. This technology is developed by developing a playable player that can be operated based on the operating system (O / S) environment of a mobile multimedia terminal and packing digital contents in the player. When the number of times (or the number of distributions) is reached, the player and the contents can be destroyed. These technologies are compatible with the DRM method, resulting in excellent system compatibility.

Claims (10)

i) a digital multimedia element in which digital multimedia data is compressed; ii) a player element comprising execution data for performing reproduction of the multimedia data; iii) a control element comprising at least data indicating the arrangement in the file of the digital multimedia element and the player element, and key data for controlling the key of the digital multimedia data; iv) A digital multimedia file capable of self-playing of multimedia without the aid of a player program embedded in a mobile multimedia device, comprising a header retaining file information. The digital multimedia file of claim 1, wherein the digital multimedia file is an execution file. The digital multimedia file according to claim 1, wherein the arrangement structure of the digital multimedia file has a sequence of a header, a player element, a control element and a digital multimedia element. The digital multimedia file according to claim 1, wherein the control element comprises size data of a player element, size data of a digital multimedia element, size data of a control element, and time data indicating an effective number of reproductions. The method of claim 4, wherein the control element counts handle key data for scrambling / descrambling of the multimedia data, codec data indicating a compression scheme of digital multimedia data included in the digital multimedia element, and the effective number of times of playing. And data selected from the group consisting of time-to-reflect ratio data and combinations thereof. When the digital multimedia file according to any one of claims 1 to 5 is executed on a digital multimedia device, (a) reading information included in a header of the digital multimedia file in a digital multimedia device, and loading execution data included in a player element of the digital multimedia file into a memory based on the information; (b) analyzing the data contained in the control element of the digital multimedia file under the control of the execution data contained in the player element, (c) on the basis of the data contained in the control element in step (b), accessing the digital multimedia element in which the digital multimedia data is compressed and reproducing the corresponding digital multimedia data. How to play digital multimedia, without the help of a programmed player program. The method of claim 6, wherein the data included in the digital multimedia element is accessed by disk access or file access by the execution data without being loaded into a memory. The method of claim 6, wherein the data included in the control element is accessed by disk access or file access by the execution data without being loaded into a memory.  When the digital multimedia file according to any one of claims 1 to 5 is executed on a digital multimedia device, Loading execution data contained in a player element of the digital multimedia file into a memory, Accessing the control data of the control element starting at the +1 point of the player element by the normal loading of the execution data contained in the player element, Analyzing the control data included in the control element, Recovering digital multimedia data using a handle key which is one of the control data, and reproducing digital multimedia data; Checking the reproduction progress of the digital multimedia data, and if the reproduction ratio of the digital multimedia data exceeds the time reflecting ratio, which is one of the control data, decreasing the value of time data of the control data by one; Inactivating the digital multimedia file when playback of the multimedia is complete, without the assistance of a player program embedded in the mobile multimedia device. 10. The method of claim 9, further comprising the step of self-destructing the digital multimedia file when the key data reaches " 0 " after multimedia playback ends.

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