KR20100021025A - Method and apparatus for sharing contents - Google Patents

Abstract

PURPOSE: A method and an apparatus for sharing contents are provided to increase the download efficiency. CONSTITUTION: Each broadcasting reception terminal(100-1~100-n) shares the inside network resources. Each broadcasting reception terminal is connected through the foreign network to the broadcasting system(102) of the remote site. Each broadcasting reception terminal downloads the contents from the broadcasting system. Each broadcasting reception terminal communicates with the inside network of the other broadcasting reception terminal. Each broadcasting reception terminal is able to receive the contents from the other broadcasting reception terminal as described above.

Description

Method and device for content sharing {Method and Apparatus for sharing contents}

The present invention relates to a method and apparatus for sharing content, and more particularly, to a method and apparatus for efficiently sharing content within an internal network such as a home or an office.

In the past, the broadcast service used an analog method, but in recent years, high-definition digital broadcast services have been provided in accordance with an increase in transmission bandwidth and the development of digital compression processing of broadcast signals including video, audio, and data.

In addition, in the past, the program (content) was provided at a predetermined time in a one-way manner, but in recent years, a video on demand (VOD) service that provides corresponding content immediately upon user's request has been provided. Is being provided.

These VOD services largely include real-time VOD and download & play (D & P).

The real-time VOD method is also called an Instant Capacity On Demand (ICOD) method or a streaming method, and when a user requests a content, the content is immediately transmitted through a network and immediately played.

Real-time VOD method has the advantage of real-time guarantee, but since it occupies a lot of bandwidth, D & P method is mainly used for VOD service.

The D & P method downloads the content in advance when the user requests the content, and plays the content after downloading the content of the front end of the content according to the user's choice. It includes a scheduled download method to play after.

Currently, the D & P method is in the spotlight in that a user can view desired content at any time in conjunction with a device equipped with a large hard disk such as a set-top box or a PVR device.

On the other hand, as IPTV service is started in earnest, not only TV but also a computer provided in a general home or office can use a broadcasting service, in particular, a VOD service provided by a broadcasting system.

As described above, even if a large number of broadcast receiving terminals exist in a limited space, even if a plurality of terminals request the same contents until now, each terminal needs to access the broadcasting system and download the contents individually, thereby causing inefficient problems. .

In addition, even if each broadcast receiving terminal requests the same content simultaneously or with a small time difference, since only individual downloads are supported, there is a problem of unnecessary external network bandwidth occupancy, and in particular, all buffered playback services requiring a certain bandwidth or more are provided. There is a problem that the broadcast receiving terminal cannot be used.

In order to solve the problems of the prior art as described above, the present invention is to propose a method and apparatus that can efficiently share content in a preset internal network.

Another object of the present invention is to provide a content sharing method and apparatus that can solve the unnecessary content double download problem.

In order to achieve the above object, according to a preferred embodiment of the present invention, a method for sharing content in a broadcast receiving terminal (first broadcast receiving terminal) connected to a broadcasting system through an external network, the content download request of the user Receiving; Requesting the content from a broadcast receiving terminal (second broadcast receiving terminal) which stores the content among one or more broadcast receiving terminals belonging to a preset internal network; And receiving the requested content from the second broadcast receiving terminal.

According to another aspect of the present invention, a method for sharing content in a broadcast receiving terminal connected to a broadcast system through an external network, the method comprising: maintaining a content list for pre-stored content; Receiving storage information query information for the content requested by the user from another broadcast receiving terminal belonging to a preset internal network, receiving the user's content download request; Determining whether the requested content is stored with reference to the content list; And when the requested content is stored, establishing a connection with the other broadcast receiving terminal and transmitting the content.

According to another aspect of the invention there is provided a computer readable recording medium having recorded thereon a program for performing the above method.

According to another aspect of the present invention, there is provided a content sharing device connected to a broadcasting system through an external network, the content sharing apparatus comprising: an internal network communication unit communicating with at least one broadcast receiving terminal belonging to a preset internal network; An external network communication unit communicating with the broadcasting system; A key input unit for receiving a content download request from a user; A controller configured to establish a connection with a broadcast receiving terminal storing the requested content through the internal network communication unit when the content download request is received; And a content storage unit for storing the received content.

According to the present invention, a plurality of broadcast receiving terminals belonging to the internal network can first download contents from the internal network through mutual recognition, thereby improving download efficiency.

In addition, according to the present invention, it is possible to receive different parts of the content from the internal network and the external network through the attribute information of the content stored in each broadcast receiving terminal, thereby improving the content download efficiency.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. Like reference numerals are used for like elements in describing each drawing.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

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.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

 Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, the same reference numerals will be used for the same means regardless of the reference numerals in order to facilitate the overall understanding.

1 is a diagram illustrating a configuration of a content sharing system according to an exemplary embodiment of the present invention.

As shown in FIG. 1, the content sharing system according to the present invention may include one or more broadcast receiving terminals 100-1 to 100-n belonging to an internal network, and each broadcast receiving terminal 100 includes an internal network. The resources may be connected to a remote broadcast system 102 via an external network while sharing resources.

Herein, the internal network supports a plurality of broadcast receiving terminals 100 installed in a limited space such as a home or an office to access an external network, and may include a general wired / wireless LAN.

In the present invention, the internal network is used as a meaning distinguished from the external network such as the Internet, satellite network, cable network, and other broadcasting networks, and communication between a plurality of pre-registered broadcast receiving terminals 100 in addition to the connection to the external network is performed. Defined as a network that can be supported.

Meanwhile, the broadcast receiving terminal 100 according to the present invention accesses the broadcast system 102 to download content requested by a user, decodes and plays the received content, and simultaneously stores the content in a mass storage such as a hard disk. do.

In addition, the broadcast receiving terminal 100 communicates with another broadcast receiving terminal 100 belonging to the internal network.

The broadcast receiving terminal 100 may be a conventional set-top box, but is not limited thereto. The broadcast receiving terminal 100 may be connected to the broadcasting system 102 such as a computer, a mobile communication terminal, and a PDA, and reproduce the content received from the broadcasting system 102. If the terminal can be applied without limitation.

The broadcast system 102 is a server that provides a video on demand (VOD) service. The broadcast system 102 provides information on content that is currently being serviced or scheduled to be provided in the form of an EPG, and when requested by the broadcast receiving terminal 100, download and play. Provide content in a way.

In addition, the broadcast system 102 may provide an application for a content request of the user.

The application may be executed in the broadcast receiving terminal 100 to process a process for channel selection, genre (category) selection, content selection, and playback of a user.

On the other hand, when the user requests the paid content, the broadcasting system 102 may perform a charging process for the content, and perform a scheduling function for the content and a scrambling function for restricting reception so that other users cannot access other than the subscriber. .

According to an exemplary embodiment of the present invention, the plurality of broadcast receiving terminals 100 may request and receive content from another broadcast receiving terminal 100 belonging to an internal network instead of the broadcast system 102. Only when the desired content is not stored in the terminal 100, the terminal 100 may selectively access the broadcast system 102 to download the desired content.

In the following description, for convenience of description, a terminal for receiving a content download request of a user is stored in the first broadcast receiving terminal 100-1 and an internal network, and the terminal for transmitting the content is transmitted through a second broadcast receiving terminal. This is described as the terminal 100-2.

For example, when a user requests a content from the first broadcast receiving terminal 100-1, the first broadcast receiving terminal 100-1 firstly selects another broadcast receiving terminal 100-2 to 100-belonging to an internal network. n) inquires whether the corresponding content is stored, and if there is a response, the user establishes a connection with the second broadcast receiving terminal 100-2 with a response, The requested content can be received.

In this case, when only some of the contents are stored in the second broadcast receiving terminal 100-2, the first broadcast receiving terminal 100-1 may request and receive only the remaining portion of the content from the broadcasting system 102. Can be.

Meanwhile, according to another embodiment of the present invention, each broadcast receiving terminal 100 may maintain a content list stored by another broadcast receiving terminal 100 belonging to an internal network. The user may search for the broadcast receiving terminal 100 storing the content requested by the user through one content list, establish a connection with the discovered terminal, and receive the content.

In general, in the download and play method, when the broadcast receiving terminal 100 downloads predetermined content from the broadcasting system 102, the broadcast receiving terminal 100 deletes the content when playback is completed at the request of the user.

In particular, since the download speed is faster than the content playback speed in the method of immediately playing after buffering a predetermined portion (eg, the minimum part for playback) of the content, the broadcast receiving terminal 100 corresponds to the case where the content playback is completed. Delete the content.

However, according to the present invention, since the stored content can be used by another broadcast receiving terminal 100, another deletion method is applied.

For example, when a user of the first broadcast receiving terminal 100-1 requests the same content while the second broadcast receiving terminal 100-2 is downloading content from the broadcasting system 102, the first broadcast is performed. The receiving terminal 100-1 may receive the corresponding content from the second broadcast receiving terminal 100-2 instead of the broadcasting system 102. At this time, even if content reproduction is completed, the second broadcast receiving terminal 100-2 suspends deletion of the corresponding content until the content transmission to the first broadcast receiving terminal 100-1 is completed.

That is, as shown in FIG. 2, the second broadcast reception terminal 100-2 deletes the content at the time when the content transmission to the first broadcast reception terminal 100-1 is completed, not at the time when the reproduction is completed. Can be.

According to the present invention, when there are a plurality of terminals that receive and reproduce broadcasts in the internal network, the broadcast system 102 is unconditionally connected to receive the content requested by the user, rather than receiving the content requested by the user. In this case, the network load can be reduced, and the content transmission quality can be improved because the content is received from a broadcast receiving terminal located at a short distance.

3 is a diagram illustrating a detailed configuration of a broadcast receiving terminal according to an embodiment of the present invention.

As shown in FIG. 3, the broadcast receiving terminal according to the present invention includes an internal network communication unit 300, an external network communication unit 302, a content storage unit 304, a video signal processing unit 306, and an audio signal processing unit 308. The controller 310 may include a terminal list manager 312, a content list manager 314, and a key input unit 316.

The internal network communication unit 300 communicates with another broadcast receiving terminal 100 belonging to a preset internal network, and when a user requests a content through the key input unit 316, the internal network communication unit 300 stores the content requested by the user. Receive requested content from 100.

The external network communication unit 302 communicates with the broadcast system 102 connected to the external network. According to the present invention, when all of the plurality of broadcast receiving terminals 100 belonging to the internal network do not store content requested by a user, Communicate with the broadcast system 102 to receive the content requested by the user.

As described above, according to the present invention, there is a case where the broadcast receiving terminal 100 belonging to the internal network stores only a part of content for specific content.

In this case, the internal network communication unit 300 may receive a part of content stored in another broadcast receiving terminal 100, and the external network communication unit 302 may request and receive the remaining part of the content by accessing the broadcast system 102. have.

In the above case, the external network communication unit 302 according to the present invention may request the remainder of the content from the broadcast system 102 after the reception of a part of the content through the internal network under the control of the control unit 310, but Without limitation, the broadcast system 102 may be connected to the broadcast system 102 at the same time as receiving the content through the internal network to request the rest of the content.

In the above description, the internal network communication unit 300 and the external network communication unit 302 have been described in separate configurations for convenience of description, but it will be apparent to those skilled in the art that one communication unit can support access to the internal and external networks. will be.

As described above, the contents received through the internal network communication unit 300 and the external network communication unit 302 are stored in the content storage unit 304.

If the user requests a reservation download, the received content is stored in the content storage unit 304. However, in the case of requesting playback after buffering, the received content is stored in the content storage unit 304 and the received content is passed through the video signal processor 306 and the audio signal processor 308, respectively, to the display unit 320 and the speaker 322, respectively. Is output via

The video signal processor 306 may include a video decoder for decoding the input video signal into a video frame and a buffer (not shown) for temporarily storing the decoded video signal.

The video signal processor 306 analog converts the temporarily stored video frame and outputs the analog frame to the display 320.

The audio signal processor 308 may include an audio decoder and an audio DAC for decoding an audio signal into an audio frame and converting the audio signal into an analog signal. The audio converted into an analog signal is output to the speaker 322.

Meanwhile, the broadcast receiving terminal according to the present invention further includes a terminal list manager 312 managing a terminal list including identification information and access information for identifying a plurality of broadcast receiving terminals 100 belonging to an internal network.

Here, the access information included in the terminal list may include address information about the broadcast receiving terminal 100 and information on whether the power is on or off.

According to an exemplary embodiment of the present invention, when a user's content request is received through the key input unit 316, the controller 310 generates a control message for inquiring whether to store the requested content by referring to the terminal list. This is transmitted to another broadcast receiving terminal 100 located at a short distance through the internal network communication unit 300.

If a response signal corresponding to the content storage is received from another broadcast receiving terminal 100 storing the corresponding content, the controller 310 establishes a connection with the broadcast receiving terminal 100 transmitting the corresponding response signal to the user. Receives the requested content.

Meanwhile, the response signal transmitted from another broadcast receiving terminal 100 may further include attribute information of the stored content in addition to the information on whether the content is stored.

Here, the content attribute information may include the total size of the corresponding content and the currently stored size information.

If a part of content is stored in the other broadcast receiving terminal 100, the controller 310 confirms the partial storage of the content through the received content property information, and the other broadcast receiving terminal (300) through the internal network communication unit 300. At the same time as requesting a part of the content through the 100, the external network communication unit 302 is connected to the broadcast system 102 to request the rest of the content.

According to the present invention, the content download efficiency can be further improved by receiving each part of the content simultaneously through the external network as well as the internal network using the attribute information of the content.

Meanwhile, according to the present invention, when a plurality of broadcast receiving terminals belonging to an internal network are storing specific content, each of the plurality of broadcast receiving terminals storing content may transmit content attribute information.

In this case, the control unit 310 according to the present invention may compare the content storage size and establish a connection with the broadcast receiving terminal that stores the largest portion of the corresponding content, that is, the stored content size is the largest.

In the above, when a user requests a content, the broadcast receiving terminal 100 receiving the user request inquires of another broadcast receiving terminal 100 whether to store the content, and when the response is received, the corresponding content is received. As described.

However, according to another embodiment of the present invention, the broadcast receiving terminal 100 according to the present invention may further include a content list manager 314 and request content from another broadcast receiving terminal 100 without the above-described inquiry process. .

The content list management unit 314 basically maintains information about content stored in its content storage unit 304, but is not limited thereto. The content list manager 314 may store information about individual content stored in each broadcast receiving terminal belonging to an internal network. I can keep it.

As shown in FIG. 4, the content list according to the present invention may include a terminal identification field, a content name field, and a content size field.

The terminal identification field 400 includes identification information of each broadcast receiving terminal 100 belonging to an internal network, the content name field 402 includes information for content identification, and the content size field 404 includes the total size of the content and Stored size information of the content may be included.

As in another embodiment of the present invention, when each broadcast receiving terminal manages a content list stored in another broadcast receiving terminal, a process of inquiring whether to store content to another broadcast receiving terminal at the user's request may be omitted. .

Meanwhile, the content list according to the present invention can be updated in various ways. For example, content deletion may be performed at one of the broadcast receiving terminals, or the content list may be updated in synchronization with content download.

In this case, when content is deleted from a specific broadcast receiving terminal, the broadcast receiving terminal may transmit a content update message to another broadcast receiving terminal after the deletion is completed. Each broadcast receiving terminal that receives the content update message deletes the corresponding content information from the broadcast receiving terminal that transmitted the message in the content list.

When content download is performed at a specific broadcast receiving terminal, the content update message may be transmitted to another broadcast receiving terminal at the same time as the content download starts.

As such, the broadcast receiving terminal receiving the content update message according to the start of the content download adds information on the content being downloaded to the broadcast receiving terminal which has transmitted the above message in the content list.

At this time, when a user's request for downloading the same content is received by the broadcast receiving terminal receiving the content update message corresponding to the start of downloading, the broadcast receiving terminal receiving the user's request is requested by the current user, not the external network. Content can be received from a broadcast receiving terminal that is downloading the same content as the content.

The broadcast receiving terminal 100 according to the present invention may further include a deletion managing unit 318. The deletion managing unit 318 manages content deletion according to a general deletion policy, and receives a broadcast whose content is scheduled to be deleted. If it is being transmitted to the terminal, the deletion is suspended.

In general, the deletion management unit 318 may be set to delete the content when the content playback is completed. However, when a specific content is played after being buffered and downloaded at the same time, and at the same time, when the content is transmitted to another broadcast receiving terminal, the deletion manager 318 receives another broadcast even if the content is finished playing. The content deletion is suspended until the content transmission to the terminal is completed.

The deletion manager 318 not only deletes the content during the buffering and playback process, but also if there is content transmission to another broadcast receiving terminal even when the specific content is to be deleted according to a general deletion period, the content transmission to the other broadcasting receiving terminal is performed. You may want to hold back the deletion until it is complete.

Hereinafter, the content sharing process according to the present invention will be described in detail with reference to FIGS. 5 to 7.

5 is a flowchart illustrating a content sharing process according to an exemplary embodiment of the present invention.

FIG. 5 illustrates a process between a first broadcast receiving terminal 100-1 receiving a user's content request in an internal network and a second broadcast receiving terminal 100-2 storing some of the content requested by the user. One flow chart.

Referring to FIG. 5, when the first broadcast receiving terminal 100-1 receives a content download request from a user (step 500), the first broadcast receiving terminal 100-1 receives a second broadcast belonging to an internal network. The terminal 102-2 inquires whether to store the corresponding content (step 502).

In response to the content storage query, the second broadcast receiving terminal 100-2 inquires whether the content requested by the first broadcast receiving terminal 100-1 is stored (step 504), and the corresponding content is stored. If so, a response signal corresponding to the content store is transmitted (step 506).

The first broadcast receiving terminal 100-1 requests the corresponding content from the second broadcast receiving terminal 100-2 (step 508).

The second broadcast receiving terminal 100-2 extracts the stored content (step 510), and transmits the extracted content to the first broadcast receiving terminal 100-1 (step 512).

The first broadcast receiving terminal 100-1 processes and reproduces the received content (step 514).

If the user makes a reservation download request, the received content is stored in the content storage unit 304.

The first broadcast receiving terminal 100-1 determines whether all of the content is received (step 516). If only a part of the content is received, the first broadcast receiving terminal 100-1 connects to the broadcasting system 102 through an external network to display the rest of the content. Request (step 518).

Meanwhile, when all of the content is downloaded in step 516, the first broadcast receiving terminal 100-1 releases the connection with the second broadcast receiving terminal 100-2 (step 520).

6 is a flowchart illustrating a content sharing process according to another preferred embodiment of the present invention.

FIG. 6 is a diagram for describing a process of sharing content without inquiring whether to store content as shown in FIG. 5.

Referring to FIG. 6, the first broadcast receiving terminal 100-1 maintains a content list of each broadcast receiving terminal in cooperation with a plurality of broadcast receiving terminals 100-2 to 100-n belonging to an internal network (step 600).

The content list of each broadcast receiving terminal may be updated in synchronization with the content deletion or download start of the other broadcast receiving terminal.

When receiving a content download request of the user (step 602), the first broadcast receiving terminal 100-1 searches for a broadcast receiving terminal that stores content requested by the user with reference to a content list of each broadcast receiving terminal stored in advance. (Step 604).

If the found terminal is the second broadcast receiving terminal 100-2, the first broadcast receiving terminal 100-1 requests content from the found second broadcast receiving terminal 100-2 (step 606). .

The second broadcast receiving terminal 100-2 extracts the requested content (step 608) and transmits the corresponding content to the first broadcast receiving terminal 100-1 (step 608).

Subsequent processes are the same as steps 510 to 514 of FIG. 5, and thus a detailed description thereof will be omitted.

7 is a flowchart of a content deletion process according to the present invention.

FIG. 7 illustrates a case where the first broadcast receiving terminal 100-1 requests the same content while the second broadcast receiving terminal 100-2 is downloading content from the current broadcasting system 102 in FIGS. 5 to 6. It is a figure which shows a process.

Referring to FIG. 7, while the second broadcast receiving terminal 100-2 connects to the broadcast system 102 and downloads specific content (step 700), the first broadcast receiving terminal 100-1 transmits the second to the second broadcast receiving terminal 100-1. In step 702, a user download request for the same content as the content being downloaded by the broadcast receiving terminal 100-2 is received.

In this case, it is assumed that the second broadcast receiving terminal 100-2 performs a buffering and playing process for the downloaded content.

The first broadcast receiving terminal 100-1 establishes a connection with the second broadcast receiving terminal 100-2 belonging to the internal network (step 704).

The second broadcast receiving terminal 100-2 transmits the content currently being downloaded to the first broadcast receiving terminal 100-1 (step 706).

Meanwhile, when content reproduction is completed (step 708), the second broadcast reception terminal 100-2 determines whether content transmission to the first broadcast reception terminal 100-1 is completed (step 710).

Whether or not the content transmission is completed may be determined based on whether a content transmission completion message is received from the first broadcast receiving terminal 100-1.

If the content transmission to the first broadcast reception terminal 100-1 is not completed, the second broadcast reception terminal 100-2 suspends the deletion of the content that has been played (step 712), and only when the content transmission is completed. The content is deleted (step 714).

Preferred embodiments of the present invention described above are disclosed for purposes of illustration, and those skilled in the art will be able to make various modifications, changes, and additions within the spirit and scope of the present invention. Additions should be considered to be within the scope of the following claims.

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

2 is a view for explaining a deletion hold process according to the present invention.

3 is a diagram illustrating a detailed configuration of a broadcast receiving terminal according to an embodiment of the present invention.

4 is a diagram illustrating a field configuration of a content list according to the present invention.

5 is a flowchart illustrating a content sharing process according to an embodiment of the present invention.

6 is a flowchart illustrating a content sharing process according to another preferred embodiment of the present invention.

7 is a flowchart of a content deletion process according to the present invention;

Claims (13)

A method of sharing content in a broadcast receiving terminal (first broadcast receiving terminal) connected to a broadcasting system through an external network, Receiving a content download request of a user; Requesting the content from a broadcast receiving terminal (second broadcast receiving terminal) which stores the content among one or more broadcast receiving terminals belonging to a preset internal network; And And receiving the requested content from the second broadcast receiving terminal. The method of claim 1, Prior to the step of requesting the content to the second broadcast receiving terminal, Maintaining a terminal list including at least one of identification information and access information of at least one broadcast receiving terminal belonging to the internal network; And And inquiring whether the one or more broadcast receiving terminals store the content requested by the user by referring to the terminal list. The method of claim 1, The method may further include maintaining a content list stored in each of at least one broadcast receiving terminal belonging to the internal network. The content list includes at least one of broadcast receiving terminal identification information, content name and size information stored in each broadcast receiving terminal. The content sharing method comprising at least one of pre-stored content related information and content related information being downloaded. The method of claim 3, And the content list is updated in synchronization with the deletion completion or the start of download in the broadcast receiving terminal belonging to the internal network. The method of claim 1, When a part of content is received from the second broadcast receiving terminal, requesting the remaining part of the content from the broadcast system; And Receiving the remainder of the content from the broadcast system. The method of claim 1, Receiving attribute information on the content from the second broadcast receiving terminal, wherein the attribute information includes at least one of total size information and stored size information of the content; And If it is determined that a part of the content is stored in the second broadcast receiving terminal based on the attribute information, requesting the remaining part of the content from the second broadcast receiving terminal at the same time as receiving the content from the second broadcast receiving terminal; Content sharing method further comprising. The method of claim 1, The first broadcast receiving terminal reproduces the content in a download and play manner, and the content download request of the user includes at least one of a request for playing after the buffering of the content and a scheduled download request. The method of claim 1, If the predetermined content is set to be deleted after the reproduction of the second broadcast reception terminal is completed, the second broadcast reception terminal may delete the content even after the reproduction of the content is completed until the content transmission to the first broadcast reception terminal is completed. How to share content on hold. The method of claim 1, Receiving attribute information on the content from a plurality of second broadcast receiving terminals storing the content requested by the user, wherein the attribute information includes at least one of total size information and stored size information of the content; And Comparing the size information stored in each of the second broadcast receiving terminal, The requesting of the content from the second broadcast receiving terminal may include establishing a connection with the broadcast receiving terminal having the largest stored size. A method of sharing content in a broadcast receiving terminal connected to a broadcasting system through an external network, Maintaining a content list for pre-stored content; Receiving storage information query information for the content requested by the user from another broadcast receiving terminal belonging to a preset internal network, receiving the user's content download request; Determining whether the requested content is stored with reference to the content list; And If the requested content is stored, establishing a connection with the other broadcast receiving terminal and transmitting the content. The method of claim 10, When the content is set to be deleted after completion of the playback, when the content is set to be connected with the other broadcast receiving terminal to transmit the content, content that is pending deletion even after the playback of the content is completed until the transmission of the stored content is completed. How to share. A computer-readable recording medium having recorded thereon a program for performing the method according to any one of claims 1 to 11. In the content sharing device connected to the broadcasting system through an external network, An internal network communication unit communicating with at least one broadcast receiving terminal belonging to a preset internal network; An external network communication unit communicating with the broadcasting system; A key input unit for receiving a content download request from a user; A controller configured to establish a connection with a broadcast receiving terminal storing the requested content through the internal network communication unit when the content download request is received; And And a content storage unit for storing the received content.

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