KR20110062574A - Method and apparatus for synchronizing of multimedia contents - Google Patents

Abstract

PURPOSE: A content synchronization method and method thereof are provided to synchronize digitalized content in each different media platform. CONSTITUTION: An information obtaining unit(220) obtains metadata and a second scene converting information including additional information added to a service target content from a different media platform device by using preset connection information. A correlation analyzing unit(225) selects an image set which has high correlation by analyzing correlation about an image including in each the first scene information and the second scene converting information.

Description

Method and apparatus for synchronizing content

The present invention relates to content provision, and more particularly, to a method and a system capable of synchronizing and providing digitized multimedia content in different systems.

In general, digitized content (eg, video files) may have different starting and ending points for different media platforms. This is due to the characteristics of each media platform.

For this reason, when the additional information (or metadata) attached to the digitized content in each media platform is reused in another media platform, there is a problem that the additional information is not displayed at the correct position.

The present invention is directed to providing a method and system capable of synchronizing digitized content on different individual media platforms.

Accordingly, the present invention is to provide a method and system that can be displayed in the correct position of the additional information attached to the content.

According to one aspect of the invention, a method is provided for synchronizing digitized content on a separate media platform.

According to an embodiment of the present invention, in a method of synchronizing contents by a media platform device, (a) analyzing first service content on a frame-by-frame basis to generate first scene transformation information—the first scene transformation information is a scene. A plurality of images and times corresponding to the transform location; (b) obtaining metadata and second scene transformation information including additional information attached to the service target content from another media platform apparatus using preset connection information; (c) selecting a set of highly correlated images by analyzing correlations for the images included in the first scene transformation information and the second scene transformation information, respectively; (d) calculating a correction interval using the selected image set; And (e) correcting a position at which the metadata is to be displayed on the content to be serviced using the calculated correction interval.

According to another embodiment of the present invention, in a method for synchronizing content by a media platform device, (aa) requesting and acquiring metadata corresponding to the service target content from another media platform device using preset access information; The meta data includes program identification information, bookmark location, bookmark location image for the bookmark location and additional information; (bb) determining a target time point by selecting a frame having the highest correlation with the bookmark location image for each frame of the service target content within a predetermined range based on the bookmark location; And (cc) correcting a position at which the additional information is to be displayed on the service target content by using the target viewpoint.

According to another aspect of the present invention, there is provided a media platform device for synchronizing digitized content on a separate media platform.

According to an embodiment of the present invention, in a media platform device for synchronizing service target content, the information generating unit for generating first scene transformation information by analyzing the service target content on a frame-by-scene basis may include scene transformation. A plurality of images and times corresponding to the location; (Information obtaining unit for acquiring meta data including additional information attached to the service target content and second scene transformation information from other media platform apparatuses using preset connection information; First scene transformation information and second scene transformation information) A correlation analysis unit for selecting a high correlation image set by analyzing the correlations of the images included in each of the images; and calculating a correction interval using the selected image set, and using the calculated correction interval, A media platform device may be provided that includes a correction unit that corrects a position to be displayed on the service target content.

According to another embodiment of the present invention, in a media platform device for synchronizing service target content, an information acquisition unit for requesting and obtaining metadata corresponding to the service target content from another media platform apparatus using preset connection information; The meta data includes program identification information, bookmark location, bookmark location image for the bookmark location and additional information; A correlation analysis unit for determining a target viewpoint by selecting a frame having the highest correlation with the bookmark location image for each frame of service target content within a predetermined range based on the bookmark location; And a correction unit configured to correct a position at which the additional information is to be displayed on the service target content by using the target viewpoint.

By providing a method and apparatus for synchronizing content according to the present invention, it is possible to synchronize digitized content in different individual media platforms.

Accordingly, the present invention can allow the additional information attached to the content to be displayed at the correct position.

The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated and described in the drawings. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all transformations, equivalents, and substitutes included in the spirit and scope of the present invention. In the following description of the present invention, if it is determined that the detailed description of the related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are only used to distinguish one component from another.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

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

[Description of Fig. 1]

1 is a diagram schematically illustrating a configuration of a system for synchronizing contents according to an embodiment of the present invention.

Referring to FIG. 1, a system according to an embodiment of the present invention includes a plurality of user terminals 110, a first media platform device 120, and a second media platform device 130.

The user terminal 110 is a terminal that can receive various contents by accessing the first media platform apparatus 120 or the second media platform apparatus 130 through a communication network. For example, the user terminal 110 may be a mobile communication terminal, a PDA, a laptop, a computer, or the like, and any device capable of accessing and executing multimedia content by accessing a communication network may be equally applicable.

The first media platform device 120 is a device that services contents corresponding to various programs requested by the user terminal 110 in response to the connection of each user terminal 110. Accordingly, the first media platform device 120 stores various contents digitized by the first media platform device 120.

However, the first media platform device 120 does not store metadata about the service target content according to the service request of the user terminal 110, and the corresponding metadata is stored in the second media platform device using preset access information. After accessing and obtaining the content, the metadata may be provided by correcting the position where the corresponding metadata is to be displayed on the service target content. This will be more clearly understood by the following description.

Here, the access information may be a URL or a domain.

The second media platform device 130 digitizes and stores various contents for the content service. In addition, the second media platform device 130 stores metadata including additional information attached to each content. Content stored in the second media platform device 130 may be content digitized by the second media platform device 130.

That is, when a metadata request for arbitrary content is received from the first media platform device 120, the second media platform device 130 may extract corresponding metadata and transmit the metadata to the first media platform device 120. have. Here, the metadata providing request may include corresponding program identification information (PID: program ID). Hereinafter, the second media platform device 130 will be described in more detail with reference to the accompanying drawings.

[Description of Fig. 2]

2 is a block diagram schematically illustrating an internal configuration of a first media platform device according to an embodiment of the present invention.

Referring to FIG. 2, the first media platform apparatus 120 according to an embodiment of the present invention may include a data transceiver 210, an information generator 215, an information acquirer 220, and a correlation analyzer 225. And a correction unit 230, a database 235, and a control unit 240.

The data transceiver 210 is responsible for transmitting and receiving data with another device (eg, the user terminal 110 and the second media platform device 130) through a communication network.

For example, the data transceiver 210 may transmit a metadata request message including content identification information (for example, program identification information) to the second media platform apparatus 130 under the control of the controller 240. have.

The information generator 215 analyzes the service target content on a frame basis to generate scene transformation information.

In more detail, the information generating unit 215 analyzes a frame only within a specified T range (where T is a real number representing time) to determine a scene transformation position, and determines scene transformation information for the determined scene transformation position. Can be generated.

For example, the information generator 215 may calculate a difference image with a frame before or after the frame, and determine that the frame as the scene conversion position when the value of all pixels of the difference image exceeds a preset threshold. have.

For example, the information generator 215 generates a difference image of a frame within a T range (for example, 10 minutes) and a frame before or after the first frame of the service target frame, and analyzes the difference image. To determine whether to convert the scene. If the difference between the image analysis result and the threshold value is exceeded, it is determined as the scene change position, and scene change information may be generated. Here, the scene transformation information may include an image corresponding to the current scene transformation position and respective time information. The image may be a thumbnail image of a frame corresponding to the corresponding scene change position.

In more detail, the information generator 215 calculates a histogram of brightness components of a frame within a T range and a frame before or after the frame, respectively, and then calculates an average squared error (MSE). If the square error is less than the first threshold, the frame may be determined as the scene transformation candidate.

Subsequently, the information generator 215 generates a difference image between a frame determined as a scene conversion candidate and a frame before or after the frame, and binarizes the difference image (for convenience of understanding and explanation). Referred to as a difference image).

That is, the information generator 215 sets the pixel value to 1 when each pixel of the binarized difference image is greater than or equal to the second threshold value, and sets the pixel value of the pixel to 0 when each pixel is less than the threshold value. Generated difference images can be generated.

Subsequently, when the pixel block of the binarized difference image has a pixel block of 1 or more, the information generator 215 may determine that a scene transformation has occurred in the corresponding image.

For example, the information generator 215 may generate a thumbnail image of a corresponding frame using an average value, a median value, or the like of a predetermined pixel block for the frame determined as the scene change position. In the present embodiment, it is assumed that a thumbnail image is generated by using an average value and a median value of a predetermined pixel block. However, the method of generating a thumbnail image may be various, such as a method using a wavelet transform. Since a method of generating a thumbnail image is already known, a separate description thereof will be omitted.

In the present embodiment, the information generation unit 215 analyzes the frames within the T range from the first frame to generate scene transformation information, respectively. You may.

In the present embodiment, it is assumed that the information generation unit 215 determines the scene conversion position through frame-by-frame analysis of the service target content when requesting the provision of the service target content, and generates scene transformation information for this. According to the implementation method, the scene change information may be generated in advance and stored in the database 235 according to the service target content.

The information acquisition unit 220 transmits a metadata request including program identification information (PID) corresponding to the service target content to the second media platform device 130 to provide metadata and scene transformation information corresponding to the service target content. Can be obtained respectively.

For example, the information acquisition unit 220 may acquire a plurality of scene transformation information in a predetermined time interval, including program identification information corresponding to the service target content.

In the present embodiment, for convenience of understanding and explanation, scene transformation information generated through the first media platform apparatus 120 will be referred to as first scene transformation information. The obtained scene transformation information is referred to as second scene transformation information.

Here, the first scene transformation information and the second scene transformation information may be information generated through different media platform devices for the same service target content.

In addition, the metadata may include program identification information and additional information, and the additional information may include a title, a tag, and user information.

Scene transformation information acquired by the second media platform device 130 may also be image and time information acquired within a predetermined time (T) range from the first frame of the corresponding service target content. Of course, the second media platform device 130 may generate scene transformation information for all frames of the service target content.

The correlation analyzer 225 selects an image set having the highest correlation through correlation analysis on the image included in each of the first scene transformation information and the second scene transformation information.

For example, the correlation analyzer 225 may calculate a correlation by analyzing whether a pixel of each image included in the first scene transformation information and a pixel of each image included in the second scene transformation information are matched 1: 1. have.

For example, the correlation analyzer 225 may cross match the obtained plurality of scene transformation information and the generated scene transformation information to select an image having a high correlation, and determine a time for the selected image.

The correction unit 230 calculates a correction interval using the image set selected by the correlation analyzer 225 (that is, the image set having the highest correlation), and uses the calculated correction interval to generate the second media platform. The metadata obtained from the device 130 is corrected for the position to be displayed on the service target content.

For example, the correction unit 230 may calculate the time interval between the frames of the service target content using the selected image set and set the correction interval.

The database 235 maps and stores various contents digitized by the first media platform apparatus 120 to respective program identification information.

The control unit 240 is an internal component of the first media platform device 120 according to an embodiment of the present invention (for example, data transmission and reception unit 210, information generation unit 215, information acquisition unit 220) , Correlation analysis unit 225, correction unit 230, database 235, etc.).

[Description of Fig. 3]

3 is a block diagram schematically illustrating an internal configuration of a second media platform apparatus according to an embodiment of the present invention.

Referring to FIG. 3, the second media platform apparatus 130 according to an embodiment of the present invention includes a data transceiver 310, an information generator 315, a database 320, and a controller 325. .

The data transceiver 310 is connected to the first media platform apparatus 120 through a communication network to perform a function of transmitting and receiving data.

For example, the data transceiver 310 may receive a metadata request including program identification information (PID) from the first media platform device 120 and output the metadata request to the information generator 315.

The information generating unit 315 extracts program identification information included in the metadata request received through the data transmitting and receiving unit 310, and obtains content corresponding to the program identification information from the database 320. Subsequently, the information generating unit 315 may calculate the difference image with the previous or next frame in units of frames within the preset T range and analyze the difference image to generate scene transformation information.

Since this is the same as described with reference to FIG. 2, redundant descriptions will be omitted.

Database 320. stores content and metadata by mapping to program identification information.

In the present embodiment, it is assumed that the second media platform device 130 generates scene transformation information in response to the metadata request from the first media platform device 120. ) May pre-generate scene transformation information and map the program transformation information to the database 320 and store the scene transformation information.

The controller 325 controls the internal components of the second media platform device (data transmitting and receiving unit 310, information generating unit 315, database 320, etc.) according to an embodiment of the present invention. .

In addition, the controller 325 extracts metadata corresponding to the metadata request, and transmits the metadata and scene transformation information generated by the information generator 315 through the data transceiver 310 to the first media platform device. Control to transmit to 120.

[Description of Fig. 4]

4 is a block diagram schematically illustrating an internal configuration of a first media platform device according to another embodiment of the present invention.

Referring to FIG. 4, the first media platform apparatus 120 according to an embodiment of the present invention may include a data transceiver 410, an information acquirer 415, a correlation analyzer 420, a corrector 425, It is configured to include a database 430 and the control unit 435.

Hereinafter, a description of components that perform the same functions as the components described with reference to FIG. 2 will be omitted, and different components or functions will be described.

The information acquisition unit 415 may obtain a metadata corresponding to the service target content by transmitting a metadata request including program identification information (PID) corresponding to the service target content to the second media platform device 130. . Here, the meta data may include program identification information, bookmark location, bookmark location image corresponding to the bookmark location, and additional information.

The correlation analysis unit 420 bookmarks frames of service target content within a predetermined range (for example, 5 minutes before the bookmark location and 5 minutes after the bookmark location) based on the bookmark location included in the metadata. The correlation with the image is analyzed and the frame with the highest correlation is selected.

Since the method of analyzing the correlation is the same as described with reference to FIG. 2, duplicate descriptions will be omitted.

The correlation analyzer 420 may select a frame having the highest correlation to determine a target time point.

Here, the bookmark location may be time information on the bookmark location. Accordingly, the correlation analyzer 420 may generate a target viewpoint (ie, time information) for the frame having the highest correlation.

The correction unit 425 may correct the position where the meta data is to be displayed on the service target content by using the determined target time point.

For example, the correction unit 425 may correct the position where the additional information included in the corresponding metadata is displayed in the service target content by comparing the bookmark position included in the metadata with the determined target viewpoint.

Since the database 430 and the controller 435 are the same as those described with reference to FIG. 2, redundant descriptions thereof will be omitted.

[Description of Fig. 5]

5 is a block diagram schematically illustrating an internal configuration of a second media platform device according to another embodiment of the present invention.

Referring to FIG. 5, the second media platform apparatus 130 according to an embodiment of the present invention includes a data transceiver 510, an extractor 515, a database 520, and a controller 525.

Since the data transceiver 510 is the same as described with reference to FIG. 3, redundant descriptions thereof will be omitted.

When the extractor 515 receives a metadata request including program identification information from the first media platform device 120 through the data transceiver 510, the extractor 515 may use the program identification information included in the corresponding metadata request. Extract the corresponding metadata from the database 520.

Here, the metadata may include program identification information, a bookmark location, a bookmark location image corresponding to the bookmark location, and additional information. The bookmark location image may be, for example, a thumbnail image corresponding to the bookmark location. In addition, the bookmark location may be time information corresponding to the bookmark location.

The database 520 maps and stores the bookmark location, the bookmark location image, content, and additional information on the program identification information.

The controller 525 controls the internal components (data transmitting and receiving unit 510, extractor 515, database 520, etc.) of the second media platform device 130 according to an embodiment of the present invention. Perform.

In addition, the controller 525 may control to transmit the metadata extracted by the extractor 515 to the first media platform apparatus 120 through the data transceiver 510.

6 is a flowchart illustrating a method of synchronizing content according to an embodiment of the present invention. Hereinafter, for convenience of understanding and description, a device for requesting metadata is collectively referred to as a first media platform device, and a device for transmitting metadata is collectively described as a second media platform device.

In operation 610, the first media platform apparatus generates first scene transformation information by analyzing the service target content on a frame basis within a preset T range. Since the method of generating the first scene conversion information is the same as described above, a redundant description will be omitted. Of course, as described above, the first scene transformation information may be generated by analyzing the entire frame of the service target content.

Here, the first scene transformation information may include a plurality of images and respective times corresponding to the scene transformation position.

In operation 615, the first media platform apparatus accesses the second media platform apparatus using the preset access information and transmits a metadata request. Here, the metadata request may include program identification information (PID) corresponding to the service target content.

In operation 620, when the metadata request is received, the second media platform apparatus extracts program identification information from the metadata request, and extracts content and metadata corresponding to the extracted program identification information from the database.

In operation 625, the second media platform apparatus analyzes the extracted content in units of frames within a preset T range to generate second scene transformation information. As described above, the second scene transformation information may be analyzed / generated for all frames of the extracted content.

In operation 630, the second media platform apparatus transmits the second scene transformation information and the metadata together to the first media platform apparatus. Since the method of generating the second scene transformation information is the same as described above, overlapping description will be omitted.

Here, the meta data may include program identification information and additional information as described above.

In operation 635, the first media platform apparatus analyzes correlations of the images using the first scene transformation information and the second scene transformation information, and selects the image set having the highest correlation.

For example, the histogram of the brightness component for each image included in each of the first scene transformation information and the second scene transformation information is calculated, and the average square error of the calculated histogram is calculated, respectively, so that the average square error is the minimum. The pair can be selected as the image set with the highest correlation.

In operation 640, the first media platform apparatus calculates a correction interval using the selected image set.

In more detail, the first media platform apparatus may calculate a time interval between frames of the service target content using the selected image set, and set it as a correction interval.

In operation 645, the first media platform apparatus corrects the position where the metadata is to be displayed on the service target content by using the calculated correction interval. In more detail, the first media platform device may correct the position where the additional information included in the metadata is to be displayed on the service target content using the correction interval.

7 is a flowchart illustrating a method of synchronizing contents according to another embodiment of the present invention.

In operation 710, the first media platform device transmits a metadata request including program identification information to the second media platform device.

For example, the first media platform device may access the second media platform device using preset access information. Subsequently, the first media platform device may transmit a metadata request including program identification information to the second media platform device.

Here, the first media platform device may request metadata corresponding to a frame at a predetermined interval corresponding to the service target content.

In operation 715, the second media platform apparatus extracts program identification information included in the metadata request and extracts metadata mapped to the program identification information.

Here, the meta data may include program identification information, bookmark location, bookmark location image, and additional information. In addition, the bookmark location may be time information regarding a location where additional information included in corresponding metadata is to be displayed.

In addition, the bookmark location image may be a thumbnail image corresponding to a frame in which additional information included in corresponding metadata is to be displayed.

In operation 720, the second media platform device transmits metadata.

In operation 725, the first media platform device receives the metadata and analyzes the correlation between the frame of the service content and the bookmark location image using the bookmark location included in the metadata to select the frame having the highest correlation. Can be.

For example, the first media platform device may set an analysis target range using a bookmark location included in the received metadata. Here, the analysis target range may be a predetermined range set before and after the bookmark position.

Subsequently, the first media platform apparatus may determine a frame having the highest correlation by analyzing a correlation between the frames included in the analysis target range of the service target content and the bookmark location image.

In operation 730, the first media platform apparatus determines a target time point for the selected frame. Here, the target viewpoint may be time information on the selected frame.

In operation 735, the first media platform apparatus corrects a position at which the metadata is to be displayed on the service target content using the target viewpoint.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the invention may be varied and varied without departing from the scope of the invention.

1 is a diagram schematically showing the configuration of a system for synchronizing content according to an embodiment of the present invention.

2 is a block diagram schematically illustrating an internal configuration of a first media platform device according to an embodiment of the present invention;

3 is a block diagram schematically illustrating an internal configuration of a second media platform device according to an embodiment of the present invention;

4 is a block diagram schematically illustrating an internal configuration of a first media platform device according to another embodiment of the present invention.

5 is a block diagram schematically illustrating an internal configuration of a second media platform apparatus according to another embodiment of the present invention.

6 is a flowchart illustrating a method for synchronizing content according to an embodiment of the present invention.

7 is a flowchart illustrating a method for synchronizing content according to another embodiment of the present invention.

Claims (16)

A method for synchronizing content by a media platform device, (a) analyzing the service target content on a frame-by-frame basis to generate first scene transformation information, wherein the first scene transformation information includes an image and time corresponding to the scene transformation position; (b) obtaining meta data including additional information attached to the service target content and a plurality of second scene transformation information from another media platform apparatus using preset connection information; (c) selecting a set of highly correlated images by analyzing correlations with respect to images included in the first scene transformation information and the plurality of second scene transformation information, respectively; (d) calculating a correction interval using the selected image set; And (e) correcting a position at which the metadata is to be displayed on the content to be serviced using the calculated correction interval. The method according to claim 1, (a) step, Calculating a histogram of brightness components of a frame before or after a frame of the content to be serviced; Calculating a mean squared error (MSE) of the calculated histogram and selecting the scene transformation candidate when the mean squared error is less than a threshold; Calculating a difference image with a frame before or after a frame selected as the scene conversion candidate; Determining a frame as a scene change position when the total pixel value of the difference image exceeds a threshold; Selecting a frame determined as the scene change position as a key frame and generating an image corresponding to the key frame; And Generating the first scene transformation information comprising a time corresponding to the image and a key frame. The method of claim 2, Steps (a1) to (a4) are performed in units of frames within a range of T (T is a real number) based on the first frame determined as the scene change position. And the second scene change information includes an image of a frame for a scene change position corresponding to a frame unit within a T range based on the first frame. The method according to claim 1, (c) step, And selecting each image included in the first scene transformation information and the second scene transformation information as an image set having the highest correlation with each other. Synchronization method. 5. The method of claim 4, The image set is a pair of any image included in the first scene transformation information and an image included in the second scene transformation information, And an image corresponding to an initial scene change position included in the first scene change information and the second scene change information is not included. 6. The method of claim 5, (d) step, And calculating a time interval between an image corresponding to the first scene change information included in the image set and an image corresponding to an initial scene change position and setting the time interval as the correction interval. A method for synchronizing content by a media platform device, (aa) requesting and acquiring metadata corresponding to the service target content from another media platform device using preset access information, wherein the metadata is added to program identification information, bookmark location, bookmark location image for bookmark location and addition; Includes information; (bb) determining a target viewpoint by selecting a frame having the highest correlation with a bookmark location image for each frame of the service target content within a predetermined range based on the bookmark location; And (cc) correcting a position at which additional information is to be displayed on the service target content using the target viewpoint. 8. The method of claim 7, Step (aa) to (bb) is repeated a plurality of times, And in the case where there are a plurality of target viewpoints, step (cc) corrects a position at which the additional information is to be displayed on the service target content by using an average value of a plurality of target viewpoints. 8. The method of claim 7, (bb) step, Calculating a difference in pixel units for each of the frame of the service target content and the bookmark location image within a predetermined range; Selecting a frame having the smallest difference as a frame having the highest correlation with the bookmark location image; And Determining the position of the frame having the highest correlation as the target viewpoint. 8. The method of claim 7, (aa) step, Transmitting a metadata transmission request including the preset access information and program identification information corresponding to the service target content to the other media platform device; And Acquiring metadata corresponding to the program identification information from the other media platform device. A media platform device for synchronizing serviced content, An information generator configured to analyze the service target content on a frame-by-frame basis to generate first scene transformation information, wherein the first scene transformation information includes a plurality of images and times corresponding to the scene transformation position; An information obtaining unit obtaining metadata and second scene transformation information including additional information attached to the service target content from another media platform apparatus using preset connection information; A correlation analysis unit configured to analyze a correlation between the images included in the first scene transformation information and the second scene transformation information, and to select a high correlation image set; And And a correction unit configured to calculate a correction interval using the selected image set, and to correct a position at which the metadata is to be displayed on the content to be serviced using the calculated correction interval. 12. The method of claim 11, The information generation unit, A difference image is generated with a frame before or after the frame of the service target content. When the total pixel value of the difference image exceeds a threshold, the frame is determined as a scene change position, and the frame determined as the scene change position is a key. Selecting a frame, generating an image corresponding to the key frame, and generating the first scene transformation information including a time corresponding to the image and the key frame. 12. The method of claim 11, The information analysis unit, And generating the first scene transformation information by analyzing frame units within a range of T (T is a real number) based on the first frame determined as the scene transformation position. The method of claim 13, And the second scene transformation information includes a plurality of images of a frame for a scene transformation position corresponding to a frame unit within a T range based on the first frame. A media platform device for synchronizing serviced content, An information acquisition unit for requesting and obtaining metadata corresponding to the service target content from another media platform device using preset access information. The metadata includes program identification information, bookmark location, bookmark location image for bookmark location, and additional information. It includes; A correlation analysis unit that determines a target viewpoint by selecting a frame having the highest correlation with respect to the bookmark location image for each frame of the service target content within a predetermined range based on the bookmark location; And And a correction unit configured to correct a position at which additional information is to be displayed on the service target content by using the target viewpoint. The method of claim 15, The information acquisition unit repeatedly acquires metadata corresponding to the bookmark position by repeating a plurality of times, The correlation analyzer determines each target time point corresponding to the obtained metadata, And a plurality of target viewpoints, wherein the correction unit corrects a position at which additional information is to be displayed on service target content using an average value of a plurality of target viewpoints.

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