KR20090091892A - Method and system for synchronization between broadcasting contents and data information - Google Patents

Abstract

A synchronization method of broadcasting contents and additional information and a system providing the service according to the flow of the time are provided to supply a service which temporally is synchronized by controlling the error of synchronization by the request of a user. A communication unit(210) performs communication with a communications terminal. An additional information database(220) stores the additional information connected with the broadcasting contents. A start PTS(Presentation Time Stamp) searcher(230) extracts the start PTS about a channel program ID. An additional information extractor(240) calculates the program progress time by using the searched start presentation time stamp. The extracting unit extracts the additional information corresponding to the calculated program progress time.

Description

Method and system for synchronization between broadcasting contents and data information

The present invention relates to a method and a system for synchronizing broadcast content with additional information. More specifically, when an additional service is requested through a communication network while a communication terminal outputs broadcast content, an additional information database provided with a communication content providing server is provided. Search and extract the starting PTS (Presentation Time Stamp) and corresponding additional information about the program ID of the corresponding channel and transmit it to the communication terminal.The communication terminal calculates the program progress time until the service request point by using the start PTS and then The present invention relates to a method and system for synchronizing broadcast content with additional information by extracting additional information corresponding to a running time and outputting the same on a broadcast screen.

Current mobile data communication services include wireless Internet services, mobile computing services, wireless data communication services, wireless Internet access services, and satellite communication services.

Among the mobile data communication services, the wireless broadcasting service field that provides various contents as personal information terminals is one of the most popular fields due to diversification of business, marketability, and technological progress, and currently includes CP (Contents Provider) and There is provided a data broadcasting service centered on broadcasters and mobile communication providers.

In the case of the existing data broadcasting service, additional information (e.g., URL) for interfacing with the communication network is transmitted through the broadcasting network, and a user accesses the communication network by using it, or delivers information displayed on the broadcasting program in the communication network. Use the method.

However, transmitting additional information through a broadcasting network causes a problem of using additional broadcasting frequency resources, and inefficiency of transmitting information even in the absence of a request for additional information from a viewer, and delivering the same information to all users. There is a service limitation.

In addition, in the case of a service providing information associated with a broadcast through a communication network, it is difficult to have a close relationship between broadcast information and additional information of a communication network in time, and thus, additional information according to the details of a broadcast program. Does not provide time matching, and relies only on a limited way of providing information by program unit.

In addition, when only data broadcasting provided through a broadcasting network is used, there is a limit in channel capacity, and thus it is not easy to provide enough desired additional information. In order to use bidirectional communication, a combination with communication is essential. For more accurate broadcast associated service, it is essential to provide a service that is exactly synchronized to each screen according to the passage of time of broadcast content.

If it is necessary to provide additional information that is perfectly synchronized with the broadcast content, such as movement of each screen or screen, audio sound, not a program unit, communication content that is already synchronized with the broadcast content is produced before the broadcast.

However, the synchronization of the broadcast content and the communication content that was matched when produced by a network delay, a processing delay, or the like may be changed in the communication terminal, and a desired degree of synchronization may vary according to the user's taste.

Accordingly, an object of the present invention is to provide a user's experience in the case where the synchronization experienced by the user in the communication terminal is not accurately represented by a network delay, a processing delay, a system delay, and the like, which may occur technically when providing a synchronized broadcast / communication service in time. The present invention provides a method and system for synchronizing broadcast content and additional information capable of receiving a service synchronized in time by adjusting an error of synchronization by request.

Another object of the present invention is to provide a method and a system for synchronizing broadcast content and additional information that can not only correct a time error in a service synchronized through a broadcast network and a communication network, but also directly reflect a user's synchronization request situation.

It is still another object of the present invention to provide a method and system for synchronizing broadcast content and additional information, which allows a user to have flexibility in service by adjusting a degree of synchronization in a communication terminal according to a service.

According to an aspect of the present invention to achieve the above object, a method of synchronizing the broadcast content provided through the broadcast network and the additional information provided through the communication network, (a) while outputting the broadcast content from the communication terminal through the communication network When an additional service is requested, generating an additional service request message including a corresponding channel ID and a program ID and transmitting the generated additional service request message to a communication content providing server, (b) when the additional service request message is received from the communication content providing server, Searching the additional information database and extracting the starting PTS for the program ID of the channel included in the message and the corresponding additional information and transmitting the extracted additional information to the communication terminal, (c) when the starting PTS and the additional information are received at the communication terminal, Calculate the program progress time up to the point of service request using the start PTS And, the synchronization method of the additional information and the broadcast contents, characterized in that it comprises a step to extract the additional information corresponding to the progression of the calculated time to the program output on the TV screen in the received additional information is provided.

In the synchronization method of the broadcast content and the additional information, if the synchronization correction is requested while the communication terminal outputs the additional information on the broadcast screen, the PTS increment for the correction correction is calculated, and the corresponding additional information is calculated according to the calculated PTS increment. And outputting forward or backward.

The synchronization correction request is input using a predetermined button.

The PTS increment for the synchronization correction is obtained by adding or subtracting the difference of the correction request PTS to the starting PTS or by adding or subtracting the difference of the correction request PTS to the PTS at the time of the synchronization correction request.

In the step (a), requesting access to the communication content providing server while outputting the broadcast content, and when connected to the communication content providing server, displaying an additional service list providing screen and providing the displayed additional service list. If the desired additional service is selected through the screen, generating an additional service request message including a channel ID and a program ID for the currently broadcast program, and transmitting the generated additional service request message to the communication content providing server.

The step (c) is a step of calculating a program progress time using the difference between the start PTS and the additional information PTS at the time of the service request and the start PTS, and additional information corresponding to the calculated program progress time in the additional information. Extracting and outputting the image on a broadcast screen.

According to another aspect of the present invention, in a method of synchronizing broadcast content provided through a broadcast network and additional information provided through a communication network, (a) when an additional service is requested through a communication network while outputting broadcast content from a communication terminal, Generating an additional service request message including a corresponding channel ID, a program ID, and a PTS at the time of the service request and transmitting the generated additional service request message to the communication content providing server; (b) when the additional service request message is received from the communication content providing server, Searching the additional information database to search for a start PTS for the program ID of the channel included in the message; (c) the communication content providing server to the service request point using the searched start PTS and the service request point PTS; The program progress time of the program and search the additional information database Extracting additional information corresponding to the calculated program progress time and transmitting the extracted additional information to the communication terminal; (d) when the additional information is received from the communication content providing server in the communication terminal, outputting the received additional information on a broadcast screen; Provided is a method of synchronizing broadcast content and additional information, comprising the step of: a.

In the synchronization method of the broadcast content and the additional information, if the synchronization correction is requested while the communication terminal outputs the additional information on the broadcast screen, the PTS increment for the synchronization correction is calculated, and the corresponding additional information is calculated according to the calculated PTS increment. It characterized in that it further comprises the step of outputting forward or backward.

The program progress time until the service request time is obtained using the difference between the PTS at the service request time and the start PTS.

According to another aspect of the present invention, a communication content providing server for providing additional information synchronized with broadcast content through a communication network to a communication terminal for outputting broadcast content provided through a broadcast network, the communication terminal for A communication unit, an additional information database storing additional information associated with the broadcast content, and when an additional service request message is received through the communication unit, extracts a starting PTS for a program ID of a channel included in the message by searching the additional information database; A start PTS search unit to calculate a program progress time up to a service request time by using the start PTS searched by the start PTS search unit, and correspond to the calculated program progress time from additional information corresponding to the program ID of the channel; Add the additional information to the additional information database. Extracted by the communication unit is provided a communication content server is provided comprising parts of the additional information extracted to be transmitted to the.

In the additional information database, a start PTS for each program ID of each channel and additional information thereof are mapped.

The additional service request message includes at least one of a channel ID, a program ID, and a PTS at the time of the service request.

According to another aspect of the invention, the communication terminal, the input unit and the output unit is provided with a communication terminal for synchronizing and outputting the broadcast content provided through the broadcast network and the additional information provided through the communication network, the additional service is requested through the input unit A service request message generation unit for generating an additional service request message including a channel ID and a program ID of the corresponding time point and transmitting the additional service request message to the communication content providing server through the communication unit; and a communication content providing server in response to the additional service request message. When the additional service information including the starting PTS and the additional information is received from the broadcast progress time calculation unit for calculating the broadcast progress time to the service request time using the start PTS and the PTS of the service request time, the additional service information The broadcast progress time meter in my additional information An additional information extracting unit which extracts additional information corresponding to a time point when the broadcast progress time calculated by the unit has passed, and outputs it through the output unit, while the additional information extracted by the broadcasting content and the additional information extracting unit is output; When the synchronization correction is requested through, a communication terminal is provided, comprising a synchronization correction unit for calculating a PTS increment for synchronization correction and outputting corresponding additional information according to the calculated PTS increment.

The broadcast progress time calculation unit calculates a broadcast progress time until a service request time by using a difference between the PTS at the time of the service request and the start PTS.

The synchronization correction unit + or-the obtained PTS increments to or from the start PTS, which is a reference for starting additional information, so that the additional information is output faster or slower than the corresponding broadcast screen.

In addition, the synchronization correction unit + or-to the obtained PTS increments to the current PTS so that the additional information is output faster or slower than the broadcast screen.

According to another aspect of the present invention, in the system for synchronizing the broadcast content provided through the broadcast network and the additional information provided through the communication network, if the additional service is requested through the communication network while outputting the broadcast content, the corresponding channel ID And generates an additional service request message including a program ID and transmits the generated service request message to a communication content providing server, and when a start PTS and additional information are received from the communication content providing server, a program progress time until a service request time using the start PTS. A communication terminal for extracting additional information corresponding to the calculated program progress time from the received additional information and outputting the additional information on a broadcast screen; and when an additional service request message is received from the communication terminal, the additional information database provided. Search for and include in the message The synchronization system of additional information and broadcast, characterized in that to extract the start PTS and the additional information on the program ID ID includes a communication content providing server to transmit the content to the communication terminal is provided.

When the synchronization correction is requested while outputting the broadcast content and the additional information on the broadcast screen, the communication terminal calculates the PTS increment for synchronization correction and outputs the additional information according to the calculated PTS increment.

As described above, according to the present invention, when the synchronization experienced by the user in the communication terminal is not accurately represented by a network delay, a processing delay, a system delay, etc., which may technically appear when providing a synchronized broadcast / communication service in time, A method and system for synchronizing broadcast content and additional information capable of receiving a service synchronized in time by adjusting an error of synchronization by a user's request can be provided.

In addition, it is possible to provide a method and a system for synchronizing broadcast content and additional information that can correct a time error in a service synchronized through a broadcast network and a communication network, and can directly reflect a user's request for synchronization.

In addition, the present invention can provide a method and system for synchronizing broadcast content with additional information that allows a user to adjust the degree of synchronization in a communication terminal according to a service.

1 is a diagram showing a system for synchronizing broadcast content and additional information according to the present invention;

2 is a block diagram schematically showing the configuration of a communication content providing server according to the present invention;

3 is a block diagram schematically showing the configuration of a communication terminal according to the present invention;

4 is a flowchart illustrating a method of synchronizing broadcast content and additional information according to an embodiment of the present invention.

5 is a flowchart illustrating a method of synchronizing broadcast content and additional information according to a user request according to an embodiment of the present invention.

6 is a flowchart illustrating a synchronization method of broadcast content and additional information according to another embodiment of the present invention.

7 is a flowchart illustrating a method for synchronizing broadcast content and additional information according to a user's request according to another embodiment of the present invention.

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

100: broadcast center 110: communication terminal

120: communication content providing server 210, 310: communication unit

220: start PTS search unit 220: additional information database

230: additional information extraction unit 320: input unit

330 storage unit 340 output unit

350: service request message generation unit 360: progress time calculation unit

370: additional information extraction unit 380: synchronization correction unit

Details of the above-described objects and technical configurations of the present invention and the effects thereof according to the present invention will be more clearly understood by the following detailed description based on the accompanying drawings.

1 is a diagram illustrating a system for synchronizing broadcast content and additional information according to the present invention.

Referring to FIG. 1, a system for synchronizing broadcast content with additional information may include a broadcast center 100 providing broadcast content through a broadcast network, and a broadcast center provided through the broadcast network while receiving broadcast content provided from the broadcast center 100. The communication terminal 110 requesting a service includes a communication content providing server 120 that provides a corresponding additional service when the additional service request message is received from the communication terminal 110.

The communication content providing server 120 receives the same broadcast content from the content provider as the broadcast content transmitted through the broadcast network and stores additional information associated with the broadcast content. Here, the additional information includes plot information of a specific program, character information of an actor, background music information, information about products appearing in the program, and the like.

When the additional service request message is received from the communication terminal 110, the communication content providing server 120 searches for the start time stamp (PTS) of the request channel EID (Event Identification) included in the message. The start PTS and the corresponding additional information are transmitted to the communication terminal 110. The EID refers to an ID uniquely assigned to each program organized in each channel, that is, a program ID.

In addition, when the communication content providing server 120 receives the additional service request message from the communication terminal 110, the communication content providing server 120 searches for a start PTS of the request channel EID included in the message, and uses the searched start PTS to request a service. Calculate the program run time up to the point in time. Then, the communication content providing server 120 extracts the corresponding additional information at the time of the service request and transmits it to the communication terminal 110.

A detailed description of the communication content providing server 120 performing the above role will be given with reference to FIG. 2.

The communication terminal 110 refers to various terminals including a mobile communication terminal implemented to simultaneously implement a broadcast service and a communication service, and provides a communication content providing server through a communication network in response to a broadcast content received through a broadcast network and a request. The additional information synchronized with the broadcast content received from 120 is displayed.

That is, when an additional service is requested through the communication network while outputting the broadcast content transmitted from the broadcasting center 100 through the broadcasting network, the communication terminal 110 generates an additional service request message including a corresponding channel ID and an EID. It transmits to the communication content providing server 120.

In addition, the communication terminal 110 outputs additional information transmitted from the communication content providing server 120 in response to an additional service request while outputting broadcast content.

In addition, when the synchronization correction of the additional information is requested while the broadcast content and the additional information transmitted from the communication content providing server 120 are output, the communication terminal 110 calculates the PTS increment for synchronization correction and adds the corresponding information. Print information.

A detailed description of the communication terminal 110 performing the above role will be given with reference to FIG. 3.

Hereinafter, a method of synchronizing broadcast content and communication content in the system configured as described above will be described.

First, synchronization of video and audio broadcasting is possible by calculation of the PTS.

When the broadcast center 100 broadcasts broadcast content through a broadcast network, video and audio data are transmitted in the form of PES packets, and each PES packet has a PTS field, which is time information for synchronizing video and audio. This PTS is incremented by 90000 per second and round-trips with a period of about 26 hours, through which the communication terminal 110 can know when video and audio data should be output. .

Knowing when the video or audio data is output from the communication terminal 110 means that the service can be synchronized according to the video or audio. Therefore, the information downloaded through the communication network other than the broadcasting network is also used as the video or audio data. It is possible to provide a service exactly in units of audio and PTS.

Therefore, what is needed is a PTS when requesting a service in the middle of a broadcast, if the user knows what value the video or audio PTS is at that point in requesting an additional service over the communication network, and the PTS at the broadcast program start time at that time. Through it, it is possible to calculate how much time has passed from the program start time to the service request time, and through this, it is possible to service the corresponding communication content prepared in advance. Then, the communication content prepared for the broadcasting program provides additional information corresponding to the audio or the audio appearing on the screen when a few minutes and a few seconds have passed since the start of the communication program.

To this end, a communication content providing server 120 for controlling a service is required, and the communication content providing server 120 shares information on when and when a corresponding program starts and ends, such as broadcasting schedule and operation information, with the broadcasting center 100. When the communication terminal 110 requests a service, the communication terminal 110 extracts and provides a PTS at the start of a corresponding broadcast program.

Since the communication terminal 110 can distinguish each channel through a channel ID and an EID, when the user requests a service, the communication terminal 110 generates an additional service request message including the channel ID and the EID at the time of the service request and provides the communication content providing server ( 120).

Then, the communication content providing server 120 determines the corresponding program by using the channel EID, extracts the starting PTS from the program, and transmits it to the communication terminal 110.

The communication terminal 110 calculates how many minutes and seconds have passed since the start of the program by using the start PTS received from the communication content providing server 120 and the PTS at the time of the pre-stored service request. The additional information at the viewpoint is displayed on the broadcast screen.

Then, the communication terminal 110 may be provided with a broadcast / communication convergence service synchronized in time.

However, when the communication terminal 110 finds the correct PTS value at the time when the additional service is requested, and the start PTS is received from the communication content providing server 120, the display time due to the processing power in the communication terminal 110. The display of the broadcast screen and the corresponding additional information may not be perfectly matched by external factors such as a delay, a time error in producing the original additional information source, and an error in the starting PTS value of the broadcasting center operation information.

In addition, the user may want to change the display time of the additional information received through the communication network, such as when the user wants to receive the information slightly earlier than the actual broadcast service.

To this end, the synchronization is controlled by changing the offset in the communication terminal 110. That is, in the case of a broadcast screen, the broadcast screen is hardly delayed because it is continuously received and displayed on the screen. Since the additional information is already generated, the information can be obtained not only in time delay but also before the corresponding broadcast time, so that the information can be expressed faster or slower than the original time by giving an offset in the additional information request.

2 is a block diagram schematically showing the configuration of a communication content providing server according to the present invention.

Referring to FIG. 2, the communication content providing server includes a communication unit 210, an additional information database 220, a start PTS search unit 230, and an additional information extraction unit 240.

The additional information database 220 receives the same broadcast content as a broadcast content from a content provider and stores additional information associated with the broadcast content. Here, the additional information includes plot information of a specific program, character information of an actor, background music information, information about products appearing in the program, and the like. The additional information is mapped to a starting PTS for each channel ID and EID.

When the additional service request message is received through the communication unit 210, the start PTS search unit 230 searches for and extracts the additional information database 220 from the start PTS of the request channel EID included in the message.

That is, since the starting PTS for each channel EID and additional information thereof are mapped in the additional information database 220, the starting PTS search unit 230 searches for the additional information database 220 and corresponds to the channel EID. Extract the starting PTS.

The additional information extractor 240 extracts the additional information included in the additional information request message for the channel EID from the additional information database 220 and transmits the additional information to the communication terminal through the communication unit 210.

In addition, the additional information extracting unit 240 calculates a program progress time up to a service request time by using the starting PTS searched by the starting PTS search unit 230, and extracts the corresponding additional information at the calculated service request time. To the communication terminal. Here, the program progress time until the service request time may be a difference between the PTS and the start PTS at the service request time.

3 is a block diagram schematically showing the configuration of a communication terminal according to the present invention.

Referring to FIG. 3, the communication terminal includes a communication unit 310, an input unit 320 for receiving a user command, a storage unit 330 for storing various data, and key data and various information signals generated by the input unit 320. And an output unit 340 for receiving and displaying an input, a service request message generator 350, a progress time calculator 360, an additional information extractor 370, and a synchronization corrector 380.

When an additional service is requested through the input unit 320, the service request message generator 350 generates an additional service request message including a channel ID and an EID at a corresponding time, and transmits the communication content through the communication unit 310. To be sent to the provisioning server. Here, the additional service request message may include a PTS at the time of requesting the additional service.

The advancing time calculator 360 receives the additional service information including the starting PTS from the communication content providing server in response to the additional service request message generated by the service request message generating unit 350. And using the PTS at the time of the service request, calculates the broadcast progress time until the service request.

That is, the progress time calculation unit 360 calculates a broadcast progress time until the service request time by using the difference between the PTS at the service request time and the start PTS.

The additional information extracting unit 370 extracts additional information corresponding to a time point when the program progress time calculated by the progress time calculating unit 360 is passed from the additional service information transmitted from the communication content providing server, and outputs the information to the output unit ( To be output through 340.

The synchronization correction unit 380 calculates a PTS increment for synchronization correction when a synchronization correction is requested through the input unit 320 while broadcasting content and additional information extracted from the additional information extraction unit 370 are output. And outputs corresponding additional information according to the calculated PTS increment.

The synchronization correction request may be input using a specific button.

For example, a case where the offset unit time is a second and the PTS increase or decrease of the unit time is a / 90000 will be described.

When the user of the communication terminal requests a synchronization correction through a specific button (an input button for adjusting the offset time, such as volume + and-), the synchronization correction unit 380 presses the button once every time. The PTS value is increased or decreased so that additional information corresponding thereto is output.

That is, if the offset button is pressed n times (in the same direction), the synchronization degree can be adjusted quickly or slowly by a total of a * n seconds, and the communication terminal increases or decreases the PTS by a × n × 90000 so that the corresponding addition is performed. Print information.

The actual calculation adds the obtained PTS increments to or from the starting PTS value, which is the basis of the start of the side information. Then, the additional information is output faster or slower than the corresponding broadcast screen. As described above, synchronization may be controlled regardless of a communication content providing server, a broadcasting center, and additional information through a PTS operation by simple key manipulation in a communication terminal.

4 is a flowchart illustrating a method of synchronizing broadcast content and additional information according to the present invention.

Referring to FIG. 4, when the communication terminal receives and outputs broadcast content through the broadcasting network (S400), and the user requests an additional service through the communication network (S402), the communication terminal includes an additional service request message including a channel ID and an EID. Generate and transmit to the communication content providing server (S404).

That is, the user requests a connection to the communication content providing server while watching broadcast content using a communication terminal, and when the user is connected to the communication content providing server, an additional service list providing screen provided by the corresponding program is displayed. The user selects a desired additional service through the displayed additional service list providing screen.

Then, the communication terminal generates an additional service request message including a channel ID and an EID for a currently broadcast program and transmits the additional service request message to the communication content providing server.

When the additional content request server receives the additional service request message (S406), the communication content providing server searches the additional information database and extracts a start PTS for the channel EID included in the message and corresponding additional information (S408). That is, since the start PTS for each program and the additional information are registered in the additional information database, the communication content providing server may extract the start PTS for the channel EID included in the message and the corresponding additional information.

Then, the communication content providing server transmits additional service information including the extracted start PTS and corresponding additional information to the communication terminal (S410).

When the communication terminal receives the additional service information including the starting PTS and the additional information (S412), the communication terminal calculates a program progress time up to the service request time using the starting PTS (S414). That is, since the communication terminal stores the PTS for the time of requesting the additional service, the program progress time is calculated using the difference between the PTS at the time of the service request and the start PTS.

Thereafter, the communication terminal extracts additional information corresponding to the calculated program progress time from the additional information included in the additional service information and outputs the additional information on the broadcast screen (S416).

5 is a flowchart illustrating a method of synchronizing broadcast content and additional information according to a user request according to an embodiment of the present invention.

Referring to FIG. 5, since step 500 to step 516 correspond to step 400 to step 416 shown in FIG. 4, a description thereof will be omitted.

After performing step 516, the communication terminal determines whether there is an additional additional service request by the user (S518).

If there is no additional additional service request as a result of the determination in step 518, the communication terminal determines whether there is a synchronization correction request by the user (S520).

That is, since the additional information transmitted from the communication content providing server is already made, the information can be obtained not only in time delay but also before the corresponding broadcast time. Therefore, the information can be expressed faster or slower than the original time by giving an offset in the additional information request.

The user may request synchronization correction using a predetermined button.

As a result of the determination of step 520, when the synchronization correction is requested, the communication terminal calculates a PTS increment for the synchronization correction (S522). That is, the communication terminal calculates the PTS increments for synchronization correction by using the number of times the button for synchronization correction is pressed.

After performing step 522, the communication terminal outputs corresponding additional information according to the calculated PTS increment (S524). That is, the communication terminal outputs the additional information to be output quickly or slowly according to the calculated PTS increment.

For example, if the offset unit time is a second and the number of button inputs is n, the difference of the correction request PTS ( ) May be a × n × 90000. Then, the communication terminal is Change the value of the starting PTS. If you want to see the additional information quickly, start PTS + PTS + If you want to see the additional information slowly, start PTS- Change to

In addition, the communication terminal leaves the start PTS as it is and provides the start time of additional information. You can get the same effect by subtracting or adding as much.

When the service of the additional information is output on the screen based on the corrected PTS value as described above, the service can be provided according to the corrected synchronization time flow at the request of the user.

6 is a flowchart illustrating a method of synchronizing broadcast content and additional information according to another embodiment of the present invention.

Referring to FIG. 6, while receiving and outputting broadcast content through a broadcasting network (S600), when a supplementary service is requested through a communication network (S602), the communication terminal displays a channel ID, an EID, and a PTS at the time of requesting a service. The additional service request message is generated and transmitted to the communication content providing server (S604).

That is, the user requests a connection to the communication content providing server while watching broadcast content using a communication terminal, and when the user is connected to the communication content providing server, an additional service list providing screen provided by the corresponding program is displayed. The user selects a desired additional service through the displayed additional service list providing screen.

Then, the communication terminal generates an additional service request message including a channel ID, an EID, and a PTS at the time of the service request for the currently broadcast program, and transmits the additional service request message to the communication content providing server.

When receiving the additional service request message (S606), the communication content providing server searches the additional information database to search for a start PTS for the channel EID included in the message (S608).

Then, the communication content providing server calculates a program progress time up to a service request time using the searched start PTS and the PTS at the service request time (S610). That is, since the communication content providing server receives the PTS for the time of requesting the additional service, the program progress time is calculated using the difference between the PTS at the time of the service request and the start PTS.

Then, the communication content providing server searches the additional information database, extracts additional information corresponding to the calculated program progress time, and transmits the additional information to the communication terminal (S612).

When the additional information is received from the communication content providing server (S614), the communication terminal outputs the received additional information on a broadcast screen (S616).

7 is a flowchart illustrating a method of synchronizing broadcast content and additional information according to a user's request according to another embodiment of the present invention.

Referring to FIG. 7, since steps 700 to 716 correspond to steps 600 to 616 shown in FIG. 6, a description thereof will be omitted.

After performing step 716, the communication terminal determines whether there is an additional additional service request by the user (S718).

If there is no additional additional service request as a result of the determination in step 718, the communication terminal determines whether there is a synchronization correction request by the user (S720).

That is, since the additional information transmitted from the communication content providing server is already made, the information can be obtained not only in time delay but also before the corresponding broadcast time. Therefore, the information can be expressed faster or slower than the original time by giving an offset in the additional information request.

The user may request synchronization correction using a predetermined button.

As a result of the determination in step 720, when the synchronization correction is requested, the communication terminal calculates a PTS increment for the synchronization correction (S722). That is, the communication terminal calculates the PTS increments for synchronization correction by using the number of times the button for synchronization correction is pressed.

After performing step 722, the communication terminal outputs corresponding additional information according to the calculated PTS increments (S724). That is, the communication terminal outputs the additional information to be output quickly or slowly according to the calculated PTS increment.

As such, those skilled in the art will appreciate that the present invention can be implemented in other specific forms without changing the technical spirit or essential features thereof. Therefore, the above-described embodiments are to be understood as illustrative in all respects and not as restrictive. The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

As described above, the method and system for synchronizing broadcast content and additional information according to the present invention are experienced by a user in a communication terminal due to a network delay, a processing delay, a system delay, and the like, which may technically appear when providing a synchronized broadcast / communication service in time. If the synchronization is not accurately represented, it can be applied to a technology that can provide a time-synchronized service by adjusting the error of synchronization at the request of a user.

Claims (19)

In the synchronization method of the broadcast content provided through the broadcasting network and the additional information provided through the communication network, (a) if an additional service is requested through a communication network while outputting broadcast content from a communication terminal, generating an additional service request message including a corresponding channel ID and a program ID and transmitting the generated service request message to a communication content providing server; (b) When the additional service request message is received from the communication content providing server, the additional information database is searched, the start PTS for the program ID of the channel included in the message, and the corresponding additional information are extracted and transmitted to the communication terminal. Step; and (c) If the start PTS and the additional information are received at the communication terminal, the program progress time until the service request point is calculated using the start PTS, and the additional time corresponding to the calculated program progress time is received from the received additional information. Extracting the information and outputting it on the broadcast screen Method of synchronizing the broadcast content and the additional information comprising a. The method of claim 1, If a synchronization correction is requested while the communication terminal is outputting the additional information on the broadcast screen, calculating a PTS increment for synchronization correction and outputting the additional information forward or backward according to the calculated PTS increment. The method of synchronizing the broadcast content and the additional information further comprising. The method of claim 2, And the synchronization correction request is input by using a predetermined button. The method of claim 2, The method of synchronizing broadcast content and additional information according to claim 1, wherein the increment of PTS for synchronization correction is obtained by adding or subtracting a difference of a correction request PTS to a starting PTS. The method of claim 2, The PTS increment for the synchronization correction is obtained by adding or subtracting the difference between the correction request PTSs to the PTS at the time of the synchronization correction request. The method of claim 1, In step (a), Requesting access to the communication content providing server while outputting broadcast content, and displaying an additional service list providing screen when connected to the communication content providing server; If a desired additional service is selected through the displayed additional service list providing screen, generating an additional service request message including a channel ID and a program ID for a currently broadcast program, and transmitting the generated additional service request message to the communication content providing server. And a broadcast content and additional information. The method of claim 1, Step (c) is, If the start PTS and the additional information are received, calculating a program progress time using a difference between the PTS at the time of the service request and the start PTS; And extracting additional information corresponding to the calculated program progress time from the additional information and outputting the additional information on a broadcast screen. In the synchronization method of the broadcast content provided through the broadcasting network and the additional information provided through the communication network, (a) When an additional service is requested through a communication network while outputting broadcast content from a communication terminal, an additional service request message including a corresponding channel ID, a program ID, and a PTS at the time of service request is generated and transmitted to the communication content providing server. step; (b) searching for a start PTS for a program ID of a channel included in the message by searching an additional information database provided when an additional service request message is received at the communication content providing server; (c) the communication content providing server calculates a program progress time up to a service request point by using the searched start PTS and a PTS of a service request point, and searches an additional information database to add the corresponding program progress time. Extracting information and transmitting the extracted information to the communication terminal; and (d) if the communication terminal receives additional information from a communication content providing server, outputting the received additional information on a broadcast screen; Method of synchronizing the broadcast content and the additional information comprising a. The method of claim 8, If a synchronization correction is requested while the communication terminal is outputting the additional information on the broadcast screen, calculating a PTS increment for synchronization correction and outputting the additional information forward or backward according to the calculated PTS increment. The method of synchronizing the broadcast content and the additional information further comprising. The method of claim 8, The program progress time until the service request time is obtained by using a difference between the PTS at the service request time and the start PTS. A communication content providing server for providing additional information synchronized with broadcast content through a communication network to a communication terminal that outputs broadcast content provided through a broadcasting network. A communication unit for communicating with the communication terminal; An additional information database storing additional information associated with the broadcast content; When the additional service request message is received through the communication unit, a start PTS search unit for searching and extracting the additional information database starting PTS for the program ID of the channel included in the message; And The program progress time until the service request point is calculated using the start PTS searched by the start PTS search unit, and additional information corresponding to the calculated program progress time is added from the additional information corresponding to the program ID of the channel. Information extraction unit to extract from the data transmission to the communication unit Communication content providing server comprising a. The method of claim 11, And the additional PTS for each program ID of each channel and additional information thereof are mapped in the additional information database. The method of claim 11, The additional service request message includes at least one of a channel ID, a program ID, and a PTS at the time of a service request. A communication terminal having a communication unit, an input unit, and an output unit for synchronizing and outputting broadcast content provided through a broadcast network and additional information provided through a communication network, A service request message generator for generating an additional service request message including a channel ID and a program ID at a corresponding time when the additional service is requested through the input unit, and transmitting the additional service request message to the communication content providing server through the communication unit; When the additional service information including the starting PTS and the corresponding additional information is received from the communication content providing server in response to the additional service request message, a broadcast progress time until the service request time using the starting PTS and the PTS at the time of the service request. A broadcast progress time calculating unit calculating a; An additional information extractor configured to extract additional information corresponding to a time point when the broadcast progress time calculated by the broadcast progress time calculation unit is passed from the additional information in the additional service information and output the extracted additional information through the output unit; and If the synchronization correction is requested through the input unit while the broadcast content and the additional information extracted by the additional information extraction unit are output, calculating the PTS increment for synchronization correction and outputting the corresponding additional information according to the calculated PTS increment. Synchronization correction unit Communication terminal comprising a. The method of claim 14, And the broadcast progress time calculator calculates a broadcast progress time until a service request time by using a difference between the PTS at the time of the service request and the start PTS. The method of claim 14, And the synchronization correction unit adds the obtained PTS increments to or from the start PTS, which is a reference for starting additional information, so that the additional information is output faster or slower than the corresponding broadcast screen. The method of claim 14, And the synchronization correction unit adds the obtained PTS increments to or from the current PTS so that the additional information is output faster or slower than the corresponding broadcast screen. A system for synchronizing broadcast content provided through a broadcasting network with additional information provided through a communication network, When an additional service is requested through a communication network while outputting broadcast content, an additional service request message including a corresponding channel ID and a program ID is generated and transmitted to a communication content providing server, and the starting PTS and the additional information are transmitted from the communication content providing server. Is received, calculates a program progress time until the service request time using the start PTS, and extracts additional information corresponding to the calculated program progress time from the received additional information and outputs it on the broadcast screen ; When the additional service request message is received from the communication terminal, search for the additional information database provided to provide a communication content for extracting the start PTS for the program ID of the channel ID included in the message and the additional information and transmitting the additional information to the communication terminal. server System for synchronizing the broadcast content and additional information, comprising a. The method of claim 18, When the synchronization correction is requested while outputting the broadcast content and the additional information on the broadcast screen, the communication terminal calculates the PTS increment for synchronization correction and outputs the additional information according to the calculated PTS increment. Synchronization system of broadcast content and additional information.