KR101243476B1 - System and method for transmitting preview contents, and apparatus and method for receiving the same - Google Patents

Abstract

The present invention allows the user to check the content of the content in advance by transmitting the preview content when the information of the content guide service is transmitted, and the SD & S server notifies whether the preview content exists and the preview content when the preview content exists. Provides the receiving device with access information including the classification information for identifying the content, and provides the preview content when the content guide server provides the information of the content guide service to the receiving device, and the receiving device provides the content guide service. When the information is displayed on the screen, the preview content is displayed together so that the user can watch the preview content.

IPTV. Preview Content, Content Guide, Preview, Still Image, Video, AV Signal

Description

System and method for transmitting preview contents, and apparatus and method for receiving the same}

The present invention relates to a system and method for transmitting preview content for transmitting preview content, and an apparatus and method for receiving preview content for receiving and providing preview content to a user.

In general, a television broadcasting service transmits an audio and video (AV) signal produced by a content producer through a radio wave transmission medium such as terrestrial broadcasting, cable broadcasting or satellite broadcasting, and transmits the transmitted AV signal through a television receiver and The service is received by a receiving device such as a set-top box and viewed by the user.

As digital-based digital television technology has been developed and commercialized, AVD broadcasts in real time through a network such as the Internet connected to each home, in addition to the existing radio transmission media, contents on demand, games, and news. It is possible to provide a variety of content, such as to viewers.

One example of providing various contents over a network is known as IPTV (Internet Protocol TeleVision). The IPTV is a service that provides an information service, a video content, a broadcast signal, and the like to a receiving device by using a high speed network such as high speed internet in a server.

IPTV is the same as terrestrial broadcasting, cable broadcasting and satellite broadcasting broadcasting through the radio wave transmission medium in that it provides contents, but it has a great feature in that a server and a receiving device can communicate in both directions. And unlike general terrestrial broadcasting, cable broadcasting or satellite broadcasting, IPTV has an advantage that viewers can select and watch desired contents at a convenient time.

As one of various services that IPTV can provide, a Broadband Contents Guide (BCG), which is a content guide service that provides information on each content, an access location, service provider information, and a service channel, is known.

In conventional digital broadcasting using an electric wave transmission medium, an EPG (Electronic Program Guide) service which processes information provided in the form of a service information (SI) table is common.

As a content guide service similar to the EPG, BCG is provided in IPTV, and information of the content guide service is transmitted to a viewer through a network that provides a wider bandwidth than a broadcast using a radio wave transmission medium.

However, the information transmission of the content guide service provides a name of a corresponding channel, name and broadcasting time information of each content provided by each channel, a connection location, a description, and the like. In addition, the receiving apparatus is limited to displaying the information of the contents guide service in the form of text or displaying the logo of a broadcasting station, and the like, such as a preview for previewing brief contents of the contents, and the like. It does not provide.

Therefore, users can only predict the brief contents including the titles of the contents with the information provided as text, and could not confirm the specific contents. In order to confirm the specific contents, they had to watch the contents directly.

An object of the present invention is to provide a preview content when the content guide server transmits the content guide service information to the receiving device to provide viewers with a preview content to preview the contents of the preview content delivery system and method To provide.

According to another object of the present invention, when a receiving device requests information of a content guide service from a content guide server, the content guide server transmits information indicating whether the preview content is present together with the information of the content guide service, so that the receiving device receives the information of the preview content. The present invention provides a device and a method for receiving preview content for downloading the preview content with information indicating whether there is a presence and displaying it on a screen.

Another object of the present invention is to provide an apparatus and method for receiving preview content for displaying preview content for respective contents when displaying information of a content guide service on a screen.

An embodiment of a system for transmitting preview content having the above object includes a content server configured to store a plurality of contents, provide information of a content guide service, a preview content server configured to store preview contents of the contents, and And preview content for contents included in the information of the content guide service provided by the content server, received from the preview content server, and stored, and when the information of the content guide service is transmitted to a receiving device. And a content guide server for providing its own access information, access information of the content server and preview content server, and SD & S (SD & S) for transmitting the access information provided by the content guide server to the receiving device. ) Is configured to include servers .

Another embodiment of a transmission system of preview content according to the present invention includes a content server for storing a plurality of contents, providing information of a content guide service, preview content for the contents, and receiving the stored preview content. A content guide server which transmits information of a content guide service provided by the content server to the receiving device, and provides its own connection information and access information of the content server and the preview content server; And a service discovery & selection (SD & S) server for transmitting the access information provided by the content guide server to the receiving device.

According to an embodiment of the present invention, a content server provides a content guide service to a content guide server, and the content guide server provides access information to a service discovery & selection (SD & S) server. Receiving, by the content guide server, the preview content server included in the information of the content guide service and providing the preview content server; transmitting, by the SD & S server, the access information to the receiving device; And transmitting the information of the content guide service and the preview content to the receiving apparatus when the content guide server is connected to the content guide server according to the access information.

Another embodiment of a method of transmitting preview content of the present invention includes the steps of providing a content guide service to a content guide server by a content server and providing the access information to a service discovery & selection (SD & S) server by the content guide server; And transmitting, by the SD & S server, the access information to a receiving device, and when the receiving device accesses the content guide server according to the access information, the content guide server transmits the information of the content guide service to the receiving device. And transmitting the preview content of the contents included in the information of the content guide service to the receiving device when the receiving device accesses the preview content server according to the access information. do.

An embodiment of an apparatus for receiving preview content according to the present invention may include a network interface unit for receiving a packet including access information, information of a content guide service, and preview content, and forwarding the received packet to a corresponding manager according to a protocol. An Internet Protocol (IP) manager, a service discovery manager for parsing the received packet according to a protocol for service discovery and selection, and a service discovery manager for extracting connection information, content guide service information, and preview content, and the network interface unit. An application / control that connects to a service discovery & selection (SD & S) server to receive the access information, and accesses a content guide server according to the access information to receive a packet including information of a content guide service and preview content; Configuration, including the user interface (UI) manager The features.

Another embodiment of the apparatus for receiving preview content according to the present invention includes a network interface unit for receiving a packet including access information, information of a content guide service, and preview content, and forwarding the received packet to a corresponding manager according to a protocol. An Internet Protocol (IP) manager, a service discovery manager for parsing the received packet according to a protocol for service discovery and selection, and a service discovery manager for extracting connection information, content guide service information, and preview content, and the network interface unit. Connect to a service discovery & selection (SD & S) server to receive the access information, access to a content guide server according to the access information to receive information of a content guide service, and access to a preview content server according to the access information to preview Application to control receiving content It characterized by configured to include indications / UI (User Interface) manager.

According to an embodiment of the present invention, there is provided a method of receiving a preview content by connecting a network interface unit to a service discovery & selection (SD & S) server under the control of an application / user interface manager, and receiving the access information. Receiving, by the network interface unit, a content guide server according to the access information, receiving information of a content guide service and preview content, and displaying information of the content guide service including the received preview content on a screen; It is characterized by comprising.

Another embodiment of a method of receiving a preview content of the present invention includes the steps of a network interface connecting to a service discovery & selection (SD & S) server and receiving the access information under the control of an application / UI manager; Receiving, by the network interface unit, a content guide service according to the access information, and receiving information of a content guide service; receiving, by the network interface unit, a preview content server according to the received access information; And displaying the information of the content guide service on the screen including the received preview content.

The present invention includes information indicating whether or not the preview content exists when the SD & S server provides access information to the receiving device, and division information for distinguishing the preview content when the preview content exists.

When the content guide server provides the information of the content guide service to the receiving device, the preview content is provided together or the receiving device determines whether the preview content exists by using the access information, and when the preview content exists, the preview is performed. When the display command of the content guide is generated after requesting and providing the preview content to the content server, information of the content guide service including the preview content is displayed on the screen.

Therefore, the user can grasp the specific content of each content through the screen displaying the information of the content guide service, and can select and watch only the desired content.

The following detailed description is only illustrative, and merely illustrates embodiments of the present invention. In addition, the principles and concepts of the present invention are provided for the purpose of explanation and most useful.

Accordingly, it is not intended to provide a more detailed structure than is necessary for a basic understanding of the present invention, but it should be understood by those skilled in the art that various forms that can be practiced in the present invention are illustrated in the drawings.

1 is a block diagram showing the overall configuration of a transmission system of the present invention. Referring to FIG. 1, the delivery system of the present invention includes a content server 100, a preview content server 110, a content guide server 120, a service discovery & selection server 130, and a first server. The gateway 140, the second gateway 150, and the receiver 160 are configured to be included.

The content server 100 stores a plurality of contents, and provides the content guide server 120 with information of a content guide service including a name of the contents and a description.

The preview content server 110 stores preview content for each of a plurality of contents in advance. The preview content may include, for example, a corresponding audio signal of contents, text, an AV (Audio and Video) signal of a notice program for predicting the contents, or a representative still image of the contents.

The content guide server 120 provides the SD & S server 130 with connection information about various servers providing predetermined services through a network. That is, the content guide server 120 provides the SD & S server 130 with access information for accessing the content server 100, the preview content server 110, and the content guide server 120. The access information provided by the content guide server 120 includes information indicating whether or not the preview content exists, and information indicating whether the preview content exists when the preview content exists.

In addition, the content guide server 120 stores the information of the content guide service provided by the content server 100, and receives the information of the stored content guide service at the request of the receiving device 160 It serves as). In addition, the content guide server 120 receives and stores the preview content for the plurality of contents from the preview content server 110, and provides the preview content when the information of the content guide service is provided to the receiver 160. Can be provided together.

The SD & S server 130 inputs and stores access information about various servers provided by the content guide server 120. In addition, the SD & S server 130 provides the stored access information to the receiving device 160 in response to a request of the receiving device 160.

When the receiving device 160 boots, it first requests the access information to the SD & S server 130. That is, the reception device 160 accesses the SD & S server 130 through the first gateway 140 to provide access information about the content server 100, the preview content server 110, and the content guide server 120. In response to the request, the SD & S server 130 provides access information to the receiving device 160.

The request and transmission of the access information performed between the receiving device 160 and the SD & S server 130 are based on a unicast scheme. Therefore, the first gateway 140 supports unicast.

The unicast method is a method of transmitting information in a 1: 1 manner. When the reception apparatus 160 requests access information from the SD & S server 130, the SD & S server 130 transmits the access information according to the request. 160).

The receiver 160 registers with the SD & S group of the first gateway 140 using the Internet Group Management Protocol (IGMP). The receiver 160 registered in the SD & S group may receive access information, playback information, and the like, for the various servers provided by the SD & S server 130 in a multicast manner. Therefore, the first gateway 140 supports the multicast scheme together.

In the multicast scheme, the SD & S server 130 may simultaneously transmit a large amount of data to a plurality of receivers 160 belonging to the SD & S group. The SD & S server 130 periodically transmits access information for various servers to the receiving device 160 registered in the SD & S group in a multicast manner.

The transmission of the access information is, for example, in the case of Digital Video Broadcasting over Internet Protocol (DVB-IP), a table of BCG (Broadband Contents Guide) Discovery records containing access information of the content guide server 120. To the receiving device 160.

Referring to the European Telecommunication Standards Institute (ETSI) Technical Specification (TS) 102 034, which is a standard for DVB-IP, a table of the BCG discovery record includes access information of the content guide server 120.

In the standard of the DVB-IP, the SD & S server 130 provides the access information to the SD & S server 130. The unicast method stipulates that the HTTP (Hyper-Text Transport Protocol) protocol is used, and the multicast method is DVBSTP (Digital). It requires the use of the Video Broadcasting SD & S Transport Protocol protocol.

The SD & S server 130 uses the DVBSTP protocol as a multicast method for transmitting the table of the BCG discovery record.

According to the present invention, the table of the BCG discovery record includes information indicating whether or not the preview content is present, and classification information for distinguishing the preview content when the preview content exists.

The receiving device 160 accesses the content guide server 120 using the access information included in the table of the BCG discovery record, and requests the information of the content guide service. The request for information of the content guide service is made by a unicast method.

The receiver 160 requests content guide service information stored in the content guide server 120 through the second gateway 150 to which the content guide server 120 is connected. The second gateway 150 supports a unicast scheme.

In the unicast method, the reception device 160 may request information of a content guide service from the content guide server 120, and the content guide server 120 receives information of the content guide service according to the request. To send). When the query is supported, the reception device 160 may selectively request only the information of the content guide service required by the content guide server 120 and selectively receive the information.

Here, the content guide server 120 and the receiver 160 request information of a content guide service using a simple object access protocol or a hyper-text transport protocol. Can be provided.

The content guide server 120 provides the information of the content guide service to the corresponding reception device 160 when a request for the information of the content guide service is input from the reception device 160.

When the content guide server 120 provides information of a content guide service to the receiving device 160, the content guide server 120 displays the preview content received from the preview content server 110. It can also be sent with information. In addition, the reception apparatus 160 determines whether the preview content exists in the table of the BCG discovery record without receiving the preview content from the content guide server 120, and when it is determined that the preview content exists, the BCG. The preview information may be requested by directly accessing the content guide server 120 using the access information included in the discovery record table, and the preview content may be provided from the content guide server 120 according to the request.

FIG. 2 illustrates a table of a BCG discovery record including information indicating whether or not preview content exists and classification information for identifying the preview content when the preview content exists. Referring to FIG. 2, the BCG providing type 'BCGOffering type' in the table of the BCG discovery record means that the table is 'BCGDiscovery'.

'BCG' means BCG record.

'BCG @ Id' means the identification code of the provider / server providing the BCG. The identification code is assigned by the service provider.

'BCG @ version' means version information of BCG. When the version information of the BCG is changed, it informs that the BCG data has been updated.

'Name' means the name of the BCG. The name of the BCG may be provided in one or more languages.

'Description' means a description of the BCG. The description of the BCG may be provided in one or more languages.

'Logo' means a pointer to the BCG's logo.

'Type' includes type information of content related to BCG. For example, the content type may be a Live Program, a Content On Demand (COD), or another type.

'TargetProvider' contains domain name information about the provider of the content described in BCG.

'TransportMode' includes location information where BCG data can be found.

'DVBSTP' in 'TransportMode' includes location information of BCG provided using DVBSTP protocol.

'Http @ Location' in 'TransportMode' contains location information of BCG provided using HTTP protocol.

'Http @ SOAP' in 'TransportMode' contains information on whether BCG provided using HTTP protocol uses SOAP protocol. The default value is 'false'.

'BCGProviderName' includes name information of a BCG provider.

In the table of the BCG discovery record, the present invention further includes 'PreviewAvailability' and 'PreviewInformation'.

The 'PreviewAvailability' informs whether or not the preview content exists. If there is no preview content, the default value is 'false'.

The 'PreviewInformation' informs the preview content when the preview content exists.

3 is a diagram illustrating a table for information 'PreviewInformation' of preview content according to the present invention. Referring to FIG. 3, a table of information of preview content is' PreviewCategory ',' PreviewMediaType @ id ',' DisplayMode ',' Position ',' Size ',' StareTime ',' Duration ',' PreviewDescription ',' MediaLocator And 'AssociatedMediaLocator'.

'PreviewCategory' informs the preview content what kind of content such as series, sports, action or art.

'PreviewMediaType @ id' indicates whether the preview content is an image, a video, an audio, or a text by using a predefined media format type.

The 'DisplayMode' indicates how the media is displayed in a form such as a slide or a trail when displayed.

The 'Position' designates a position where the preview content is to be displayed.

The 'Size' indicates the size to display the preview content.

The 'StareTime' indicates when the preview content starts.

'Duration' informs the entire time that the preview content is displayed.

'PreviewDescription is a brief description of the preview content.

The 'MediaLocator' informs the addresses of media files in which the preview content exists. The address can be any transport protocol in a Uniform Resource Identifier (URI) manner.

The 'AssociatedMediaLocator' announces the address of content associated with the preview in a CRID manner.

FIG. 4 is a diagram illustrating a table for preview media type 'PreviewMediaType @ id' in the table for information 'PreviewInformation' of the preview content of FIG. 3. Referring to FIG. 4, if the preview content is an image, whether or not the preview content is an image, the preview content is formatted in a graphics interchange format (GIG), a joint photographic coding expert group (JPEG), a tagged image file format (TIFF), or an X bit map (XBM). Inform.

If the preview content is text, it indicates whether it is plain American Standard Code for Information Interchange (ASCII) text or text formatted in Hyper-Text Markup Language (HTML) or XML (eXtensible Markup Language).

If the preview content is audio, it indicates whether it is basic audio or audio formatted as a Moving Picture Experts Group (MPEG) or a Windows Wave file (WAV).

When the preview content is video, it is informed whether the video is formatted in Quicktime or AVI (Audio Video Interleaving).

5 is a block diagram showing the configuration of the receiving apparatus of the present invention. Referring to FIG. 5, the reception apparatus of the present invention includes a network interface unit 502, an IP protocol manager 504, an application / user interface manager 506, a channel manager 508, and a service information decoder. 510, service information database unit 512, service discovery manager 514, service control manager 516, CAS / DRM (Conditional Access System / Digital Rights Management) unit 518, service delivery manager 520, The demultiplexer 522, the audio and video (AV) decoder 524, the display unit 526, the storage unit 528, the system manager 530, the audio and video signal controller 532, and the AV signal storage unit ( 534).

The network interface unit 502 receives packets through a network and outputs packets provided by the receiver 160 to the outside through the network.

The IP manager 504 is responsible for packet transmission from the source to the destination for the packet received through the network interface unit 502 and the packet transmitted to the outside from the receiving device 160. In addition, the IP manager 504 classifies the packet received through the network interface unit 502 to correspond to the appropriate protocol.

The application / UI manager 506 provides a graphical user interface (GUI) for the user to operate the receiving device 160 to the user using an OSD (On Screen Display), and is input from the user through the GUI. The receiver 160 performs an operation according to an operation command of a key signal. For example, when the key signal input from the user is an operation command for channel selection, the application / UI manager 506 transmits an operation command for channel selection to the CM (Channel Manager) unit 508.

The channel manager 508 creates a channel map. In addition, the channel manager 508 selects a reception channel according to an operation command for channel selection input from the application / UI manager 506 and controls the service discovery manager 514. In addition, the channel manager 508 receives the service information of the channel from the service information decoder 510, and sets the PID (Packet Identifier) of the AV signal received through the reception channel to the demultiplexer 522.

The service information decoder 510 decodes service information such as program specific information (PSI). That is, the demultiplexer 522 receives and decodes the demultiplexed PSI section, PSIP (Program and Service Information Protocol) section, or DVB-SI (Service Information) section.

The service information decoder 510 decodes the received sections to generate a database of service information, and stores the database of the service information in the service information database unit 512.

The service discovery manager 514 provides information necessary for selecting a service provider providing a service. When a signal for channel selection is input from the application / UI manager 506, the service discovery manager 514 uses the information to find a service.

The service control manager 516 is responsible for selecting and controlling a service. For example, when a user selects a live broadcasting service such as a conventional broadcasting method, IGMP (Internet Group Management Protocol) or RTSP (Real-Time Streaming Protocol) is used, and VOD (Video On Demand) When selecting the same service, RTSP is used to select and control the service.

The RTSP protocol may provide a trick mode for real time streaming.

The packet regarding the service received through the network interface unit 502 and the IP manager 504 is transmitted to the CAS / DRM unit 518. The CAS / DRM unit 518 is responsible for a Conditional Access System (CAS) and Digital Rights Management (DRM) of a service.

The service delivery manager 520 is responsible for controlling the received service data. For example, when controlling real-time streaming data, RTP / RTCP (Real-Time Transport Protocol / RTP Control Protocol) is used.

Since the real-time streaming data is transmitted using the RTP, the service delivery manager 520 parses the received data packet according to the RTP and delivers it to the demultiplexer 522. The service delivery manager 520 feeds back the network reception information to a server providing a service using RTCP.

The demultiplexer 522 demultiplexes the received packet into audio, video, and program specific information (PSI) data, and outputs the demultiplexer 522 to the AV decoder 524 and the service information decoder 510, respectively.

The AV decoder 524 decodes AV data input from the demultiplexer 522. The video data decoded by the AV decoder 524 is displayed on the display unit 526 and provided to the user, and the decoded audio data is output through a speaker (not shown) and provided to the user.

The storage unit 528 stores setup data for the system. The storage unit 528 may use a nonvolatile random access memory (NVRAM) or a flash memory.

The system manager 530 controls the overall operation of the receiver 160 through a power source.

The AV signal controller 532 stores the stream of the AV signal output from the demultiplexer 522 in the AV signal storage unit 534. In addition, the AV signal controller 532 reproduces the stream of the AV signal stored in the AV signal storage unit 534, and inputs and decodes the stream of the reproduced AV signal to the AV decoder 524. The video data decoded by the AV decoder 524 is displayed through the display unit 526 and provided to the user, and the decoded audio data is output through a speaker (not shown) and provided to the user.

When the receiving device 160 is booted, the application / UI manager 506 first accesses the SD & S server 120 through the service control manager 516, the IP manager 504, and the network interface unit 502. Request connection information. In response to the request for the access information, the SD & S server 120 provides a table of BCG discovery records, which are access information, to the receiver 160. The BCG discovery record table includes access information for the receiver 160 to access the content server 100, the preview content server 110, and the content guide server 120. In addition, the table of the BCG discovery record includes information indicating whether or not the preview content exists as described above, and the classification information for distinguishing the preview content when the preview content exists.

The table of BCG discovery records provided by the SD & S server 120 is received through the network interface unit 502, and a packet including the table of the received BCG discovery records is input to the IP manager 504.

The IP manager 504 checks whether the destination of the packet input from the network interface unit 502 is the receiver 160 itself, and if the receiver 160 itself is the packet, the IP manager 504 transmits the packet to the transmit / receive protocol. Therefore, it passes to the appropriate manager block.

The table of the BCG discovery record is transmitted from the SD & S server 120 to provide access information of the preview content server 110. Accordingly, the IP manager 504 forwards the packet containing the table of BCG discovery records to the service discovery manager 514.

The service discovery manager 514 manages access information for servers providing various services, and the service discovery manager 514 parses a table of the BCG discovery record to obtain access information of the content guide server 120. The acquired information is transferred to the application / UI manager 506.

The application / UI manager 506 connects to the content guide server 120 through the service discovery manager 514, the IP manager 504, and the network interface unit 502 according to the access information of the content guide server 120. Access the information guide service.

The content guide server 110 transmits the information of the content guide service when a request for the information of the content guide service is received from the receiver. When the request for the information of the content guide service is selectively requested by the query method, the information on the selectively requested content guide service is transmitted to the receiving apparatus. In this case, the content guide server 110 reads from the preview content server 110 in advance and stores the content with the preview content in the information of the content guide service, and provides the information of the content guide service to the receiver. The read preview content may be provided to the receiving device together.

The information of the content guide service provided by the content guide server 110 is received through the network interface unit 502, and the received information of the content guide service is transmitted to the application / UI manager 506 through the IP manager 504. Delivered.

The application / UI manager 506 stores and manages the received information of the content guide service in the service information database unit 512, and when a key signal for a display command of the content guide is input from a user, The preview content is also displayed while the information is displayed on the display unit 526 using an OSD or the like.

When the content guide server 110 provides the information of the content guide service and does not provide the preview content, the application / UI manager 506 previews the table of BCG discovery records provided from the SD & S server 120. Check the contents that exist. When the contents in which the preview content exists are identified, the application / UI manager 506 may connect the service discovery manager 514, the IP manager 504, and the network interface unit 502 according to the access information of the preview content server 110. The preview content server 120 is accessed and the preview content is requested.

In response to the request of the preview content, the preview content server 110 provides corresponding preview contents. The preview contents provided by the preview content server 110 are received through the network interface unit 502, and the received preview content is delivered to the application / UI manager 506 through the IP manager 504.

The application / UI manager 506 stores and manages the preview contents in the service information database unit 512. When the key signal for a display command of the contents guide is input from the user, the application / UI manager 506 displays the information of the contents guide on the OSD. The preview content is also displayed on the display unit 526 while being used.

For example, as shown in FIG. 6, when the content guide service is displayed, the content guide is displayed at the bottom of the screen, and when there is preview content for the content where the cursor is located, the display area on the upper right side of the screen. The preview content is displayed at 600 so that the user can check it.

Here, the displayed preview content may be displayed including both a video and a still image. In addition, when the preview content is audio data, only the audio may be output to the speaker without being displayed on the display area 600.

In addition, for the display of the information of the content guide service, for example, as shown in FIG. 7, each display area 700 is set at the lower end of each content displayed on the screen, The preview content may be displayed.

Here, for example, 'Preview not found' is displayed on the display area 700 of the content in which the preview content does not exist to inform the user that the preview content does not exist.

When the preview content includes an audio signal and outputs all of the audio signals to the speaker, the user may not hear the audio signal correctly. Therefore, when the application / UI manager 506 displays the information of the content guide service, the application / UI manager 506 may determine the content where the cursor is located, and output only the audio signal corresponding to the preview content of the determined content to the speaker.

8 illustrates the operation of one embodiment of a method of the present invention. Referring to FIG. 8, first, the content server 100 provides information of a content guide service to the content guide server 120 (S800).

The content guide server 120 provides access information to the SD & S server 130 (S802). The access information includes access information for receiving apparatus 160 to access the content server 100, the preview content server 110, and the content guide server 120. In addition, the access information includes information indicating whether or not the preview content exists, and if the preview content exists, the division information for distinguishing the preview content.

Here, the steps (S800, S802) is an order of convenience, and the content guide server 120 first provides the access information to the SD & S server 130, and then the content server 100 provides the content guide service information. The server 120 may be provided, or the access information and the information of the content guide service may be simultaneously provided.

The content guide server 120 determines the content in which the preview content exists from the information of the content guide service provided from the content server 100. When there is content with the preview content as a result of the determination, the content guide server 120 requests the preview content from the preview content server 110 (S804), and the preview content server 110 responds to the request. The preview content is provided to the content guide server 120 (S806).

In such a state, the receiving device 160 boots (S808), and when the booting is completed, accesses the SD & S server 130 and requests access information (S810). Then, the SD & S server 130 informs the reception device 160 of the BCG discovery record, which is information indicating whether the preview content exists and whether the preview content exists, the access information including the classification information for distinguishing the preview content. It provides a table of (S812).

The receiving device 160 receives the access information provided by the SD & S server 130, accesses the content guide server 120 according to the received access information, and requests the information of the content guide service (S814). Then, the content guide server 120 provides the information of the content guide service to the receiving device 160 in response to the request. At this time, the content guide server 120 provides the preview content while providing the information of the content guide service (S816).

In this state, the receiving device 160 determines whether a key signal for a display command of the content guide is input from the user (S818). When the display command of the content guide is input as a result of the determination, the reception device 160 displays the content guide service information on the display unit 526, for example, as shown in FIG. 6 or 7. Information of the content guide service is displayed on the screen (S920).

9 is a schematic diagram showing the operation of another embodiment of the method of the present invention. Referring to FIG. 9, the content server 100 provides information of a content guide service to the content guide server 120 (S900). The content guide server 120 provides access information to the SD & S server 130 (S902). In the connection information, as in the above-described embodiment, the reception device 160 can access the content server 100, the preview content server 110, and the content guide server 120, and whether the preview content exists. Information to be notified and classification information for distinguishing the preview content when the preview content exists are included.

In such a state, the receiving device 160 is booted (S904), and upon completion of booting, requests the access information to the SD & S server 130 (S906). Then, the SD & S server 130 provides the reception device 160 with BCG discovery record which is information indicating whether the preview content is present and access information including information on the preview content (S908).

When the SD & S server 130 provides the access information, the receiving device 160 receives the access information, requests the information of the content guide service by accessing the content guide server 120 according to the received access information ( S910). Then, the content guide server 120 provides the information of the content guide service to the receiving device 160 according to the request (S912).

The reception device 160 determines the content in which the preview content exists by using the access information provided from the SD & S server 130, and accesses the preview content server 110 when the content in which the preview content exists is present. The preview content is requested (S914). Then, the preview content server 110 provides the preview content to the receiving device 160 in response to the request (S916).

In this state, the receiving device 160 determines whether a key signal for a display command of the content guide is input from the user (S918). When the display command of the content guide is input as a result of the determination, the reception device 160 displays the content guide service information on the display unit 526, for example, as shown in FIG. 6 or 7. Information of the content guide service is displayed on the screen (S920).

Here, the receiver 160 accesses the preview content server 110 to request the preview content in advance, and receives the preview content according to the request, and then includes the preview content when a display command of the content guide is input. Displaying the information of the content guide service on the screen has been described as an example.

In the embodiment of the present invention, when the receiving apparatus 160 does not receive the preview content from the preview content server 110 in advance and the display command of the content guide is input, the receiving device 160 connects to the preview content server 110 to preview content. Request information, and after receiving the preview content according to the request, the information of the content guide service including the preview content may be displayed on the screen.

The present invention has been described in detail with reference to exemplary embodiments, but those skilled in the art to which the present invention pertains can make various modifications without departing from the scope of the present invention. Will understand.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

1 is a block diagram showing the overall configuration of a transmission system of the present invention;

2 illustrates a table of BCG discovery records including presence information of preview content and information on preview content according to the present invention;

3 is a view showing a table for information of preview content according to the present invention;

4 is a table illustrating a preview media type in a table of information of preview contents according to the present invention;

5 is a block diagram showing the configuration of a receiving apparatus of the present invention;

6 and 7 are views for explaining that the receiving device displays the preview content on the screen according to the present invention;

8 illustrates the operation of one embodiment of a method of the present invention, and

9 shows the operation of another embodiment of the method of the present invention.

Claims (24)

A content server storing a plurality of contents and providing information of a content guide service; A preview content server storing preview content for the contents; Receive and store preview content for the contents included in the information of the content guide service provided by the content server from the preview content server, and share the preview content when transmitting the information of the content guide service to a receiver. A content guide server transmitting and providing access information of the content server and access information of the content server and the preview content server; And A service discovery & selection (SD & S) server for transmitting the access information provided by the content guide server to the receiving device; The access information includes indication information for informing the existence of the preview content so that the receiving apparatus can determine whether the preview content exists. If the indication information indicates the presence of the preview content, the connection information further includes preview content information for the preview content, The preview content information includes content encoding format information for notifying a content format of the preview content and information for designating a position at which the preview content is to be displayed. Delivery system of preview content. A content server storing a plurality of contents and providing information of a content guide service; A preview content server storing preview content of the contents and transmitting the stored preview content to a receiving apparatus; A content guide server transmitting information of a content guide service provided by the content server to the receiving device and providing access information of the content guide service and access information of the content server and the preview content server; And A service discovery & selection (SD & S) server for transmitting the access information provided by the content guide server to the receiving device; The access information includes indication information for informing the existence of the preview content so that the receiving apparatus can determine whether the preview content exists. If the indication information indicates the presence of the preview content, the connection information further includes preview content information for the preview content, The preview content information includes content encoding format information for notifying a content format of the preview content and information for designating a position at which the preview content is to be displayed. Delivery system of preview content. 3. The method according to claim 1 or 2, The preview content information includes information for designating a position at which the preview content is to be displayed, information about a size at which the preview content is to be displayed, information about when the preview content is started, and information about a duration of time when the preview content is displayed. And at least one of information on a description of the preview content and information on an address of the preview content.  Delivery system of preview content. The system of claim 1, wherein the preview content server; The preview content transmission system, characterized in that to provide the corresponding preview content at the request of the content guide server. 3. The system of claim 2, wherein the preview content server; And transmitting the preview content at the request of the receiver. The method of claim 1, wherein the content guide server; And when the receiver requests information of a content guide service, transmitting the information of the content guide service and the preview content together. The method of claim 2, wherein the content guide server; And when the receiving device requests the information of the content guide service, transmitting the information of the content guide service to the receiving device. A content server providing information of a content guide service to a content guide server, and the content guide server providing access information to a service discovery & selection (SD & S) server; Requesting, by the content guide server, the preview content included in the information of the content guide service from the preview content server; Transmitting, by the SD & S server, the access information to a receiving device; And Transmitting, by the content guide server, the information of the content guide service and the preview content to the receiving device when the receiving device accesses the content guide server according to the access information. The access information includes indication information for notifying the existence of the preview content so that a reception apparatus can determine whether the preview content exists. If the indication information indicates the presence of the preview content, the connection information further includes preview content information for the preview content, The preview content information includes content encoding format information for notifying a content format of the preview content and information for designating a position at which the preview content is to be displayed. Method of transmitting preview content. A content server providing information of a content guide service to a content guide server, and the content guide server providing access information to a service discovery & selection (SD & S) server; Transmitting, by the SD & S server, the access information to a receiving device; Transmitting, by the content guide server, information of the content guide service to the reception device when the reception device accesses the content guide server according to the access information; And Transmitting the preview content of the contents included in the information of the content guide service to the receiving device when the receiving device accesses the preview content server according to the access information. The access information includes indication information for notifying the existence of the preview content so that a reception apparatus can determine whether the preview content exists. If the indication information indicates the presence of the preview content, the connection information further includes preview content information for the preview content, The preview content information includes content encoding format information for notifying a content format of the preview content and information for designating a position at which the preview content is to be displayed. Method of transmitting preview content. 10. The method of claim 8 or 9, wherein the transmission of the access information; And transmitting the preview content when the reception apparatus requests access information by accessing the SD & S server. 10. The method according to claim 8 or 9, Transmission of the information of the content guide service; And when the receiving device requests the information of the content guide service by accessing the content guide server. 10. The method according to claim 8 or 9, And displaying, by the receiving device, information on a content guide service including the preview content on a screen according to a display command of the content guide. 10. The method according to claim 8 or 9, The preview content information includes information for designating a position at which the preview content is to be displayed, information about a size at which the preview content is to be displayed, information about when the preview content is started, and information about a duration of time when the preview content is displayed. And at least one of information on a description of the preview content and information on an address of the preview content. Method of transmitting preview content. 10. The method of claim 9, wherein the transmission of the preview content; Determining, by the receiving apparatus, content in which the preview content exists in the access information; Requesting, by the receiving device, the preview content server of the preview content of the determined content; And And transmitting, by the preview content server, the requested preview content to the receiving device. A network interface unit configured to receive a packet including access information, content guide service information, and preview content; An IP (Internet Protocol) manager for delivering the received packet to a corresponding manager according to a protocol; A service discovery manager for parsing the received packet according to a protocol for service discovery and selection to extract access information, information of a content guide service, and preview content; And The network interface unit accesses a service discovery & selection (SD & S) server to receive the access information, and accesses a content guide server according to the access information to receive a packet including information of a content guide service and a preview content; Including an application / UI (User Interface) manager to control, The access information includes indication information for notifying the existence of the preview content so that a reception apparatus can determine whether the preview content exists. If the indication information indicates the presence of the preview content, the connection information further includes preview content information for the preview content, The preview content information includes content encoding format information for notifying a content format of the preview content and information for designating a position at which the preview content is to be displayed. Receiving device for preview content. A network interface unit configured to receive a packet including access information, content guide service information, and preview content; An IP (Internet Protocol) manager for delivering the received packet to a corresponding manager according to a protocol; A service discovery manager for parsing the received packet according to a protocol for service discovery and selection to extract access information, information of a content guide service, and preview content; And The network interface unit accesses a service discovery & selection (SD & S) server to receive the access information, accesses a content guide server according to the access information to receive information of a content guide service, and previews a content server according to the access information. An application / UI (User Interface) manager controlling access to receive preview content, The access information includes indication information for notifying the existence of the preview content so that a reception apparatus can determine whether the preview content exists. If the indication information indicates the presence of the preview content, the connection information further includes preview content information for the preview content, The preview content information includes content encoding format information for notifying a content format of the preview content and information for designating a position at which the preview content is to be displayed. Receiving device for preview content. 17. The method according to claim 15 or 16, And a service information database unit for storing the access information, information of a content guide service, and preview content. 17. The method according to claim 15 or 16, The preview content information includes information for designating a position at which the preview content is to be displayed, information about a size at which the preview content is to be displayed, information about when the preview content is started, and information about a duration of time when the preview content is displayed. And at least one of information on a description of the preview content and information on an address of the preview content. Receiving device for preview content. 17. The method according to claim 15 or 16, And a display unit for displaying information of a content guide service including the preview content on a screen under the control of the application / UI manager. In the method for receiving the preview content at the receiving device of the preview content, Accessing a service provider and receiving access information; Receiving content guide information by accessing a content guide server according to the received access information; Receiving indication information on whether there is preview content for content in the content guide information; Determining whether the preview content exists using the indication information; Acquiring preview content information for the preview content when the indication information indicates the presence of the preview content; If the indication information indicates the presence of the preview content, receiving preview content from a preview content server; And displaying the content guide information on the screen together with the received preview content. The preview content information includes content encoding format information for notifying a content format of the preview content and information for designating a position at which the preview content is to be displayed. Receiving preview content. 21. The method of claim 20, Receiving the preview content Receiving the preview content together with the content guide information from the preview content server through the content guide server. 22. The method according to claim 20 or 21, The preview content information may include information about a size at which the preview content is to be displayed, information about a time point at which the preview content starts, information about a duration for displaying the preview content, information about a description of the preview content, and Further comprising at least one of information about the address of the preview content Receiving preview content. 22. The method of claim 20 or 21, wherein displaying the content guide information; And displaying the content guide information when a display command of the content guide is generated. 22. The method of claim 21, If the indication information indicates the presence of the preview content, receiving preview content information for the preview content, The preview content information includes division information for distinguishing the preview content, Receiving the preview content; Requesting and receiving the preview content with the indication information and the division information; Receiving preview content.

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