CN101350687A

CN101350687A - Broadcast receiver, broadcast data transmitting method and broadcast data receiving method

Info

Publication number: CN101350687A
Application number: CNA2008101281505A
Authority: CN
Inventors: 李俊徽; 李文烈; 金镇泌
Original assignee: LG Electronics Inc
Current assignee: LG Electronics Inc
Priority date: 2007-07-19
Filing date: 2008-07-21
Publication date: 2009-01-21
Anticipated expiration: 2028-07-21
Also published as: KR101351040B1; KR20090008968A; CN101350687B

Abstract

A broadcast receiver, broadcast data transmitting method and broadcast data receiving method are disclosed, by which information on a service provided by a service provider can be provided, by which a preview can be provided, and by which a time taken for a channel switching can be reduced. The present invention includes transmitting service provider discovery information (S904) including information on a service provider, transmitting service discovery information including information on a service provided to the service provider (S910), and transmitting a stream for the service to a connected receiver (S916).

Description

Broadcasting receiver, broadcast data transmitting method and broadcast data receiving method

The application requires the priority of the korean patent application No.10-2007-72353 of submission on July 19th, 2007, by reference this application is combined in this, as setting forth fully at this.And the application requires the priority of the korean patent application No.10-2007-79138 of submission on August 7th, 2007, by reference this application is combined in this, as setting forth fully at this.

Technical field

The present invention relates to a kind of broadcast data method of sending and receiving, and more specifically, relate to a kind of broadcasting receiver, broadcast data transmitting method and broadcast data receiving method.

Background technology

Usually, in the broadcasting receiver of correlation technique, via the electric wave mounting medium, for example ground, cable, satellite broadcasting etc. send the content that is produced by broadcasting station (broadcasting station).The user watches via the content that receiver received that can receive described respective carrier medium then.

Owing to develop the digital broadcasting technology and with its commercialization from case of conventional analog broadcast, so can for example ground, wire cable etc. provide various content services to the user, for example broadcasting, CoD (on-demand content), recreation, news etc. in real time via the internet that is connected to family and traditional sucrose.

Use the internet that the example of content service is provided as being used to, IPTV (Internet Protocol TV) is arranged.In the IPTV technology, send various information services, live image content, broadcasting etc. it is provided to user's receiver via the internet.Can on the diverse network that comprises fiber cable network (optical cable network), coax network, FTTH (Fiber to the home), telephone network, wireless network etc., realize internet network based on IP (Internet Protocol).

State in the use in the situation of service of internet network,, can add interactivity unlike common terrestrial broadcasting.Therefore, be convenient to the user and watch special content service at a convenient time.

Summary of the invention

Correspondingly, the present invention relates to a kind of broadcasting receiver, broadcast data transmitting method and broadcast data receiving method, they have avoided one or more problem of causing owing to the restriction of correlation technique and shortcoming basically.

One object of the present invention is to provide a kind of broadcasting receiver, broadcast data transmitting method and broadcast data receiving method, and the information of service that relevant service provider provides can be provided thus.

Another object of the present invention is to provide a kind of broadcasting receiver, broadcast data transmitting method and broadcast data receiving method, can provide preview thus.

Also purpose of the present invention is to provide a kind of broadcasting receiver, broadcast data transmitting method and broadcast data receiving method, can reduce thus to be used for the required time of channel switching.

Additional advantages of the present invention, purpose and feature will partly be set forth in explanation subsequently, and are partly understood or can understand from the invention process by reading following content by those of ordinary skills.By the structure that in printed instructions and claim and appended accompanying drawing, particularly points out, can realize and obtain purpose of the present invention and other advantage.

In order to realize these purposes and other advantage, and according to as here embody and the purpose of the present invention of generalized description, a kind of method that sends broadcast data according to the present invention comprises: the service provider who sends the information that comprises relevant service provider finds that information (service providerdiscovery information), transmission comprise the service discovery information (service discovery information) about the information of the service that is provided for the service provider, and sends the stream (stream) that is used for described service to the receiver that is connected.

Preferably, in the stream forwarding step, send the stream that is used for showing the stream of the service of asking channel (displayrequested channe) and is used for the service of at least one buffering setting contents of channel (buffering-set channel).Here, the buffering setting contents of channel comprises at least one channel of selecting from following group, described group comprises the adjacent channel that shows the request channel, watches channel (previously viewed channel), user's special use to watch reserved channel (user-specific viewing reserved channel) and user's preference channel (user-preferredchannel) in advance.

Preferably, described information about service comprises the information about the preview service of main service and main service.Here, in the stream forwarding step, send the stream that is used for the preview service.

More preferably, described service discovery information comprises the information of relevant at least one preview service.

More preferably, described preview information on services comprises at least one information of selecting from following group, described group comprises that indication provides DVB three metamessages (DVB triplet information), preview service access address information, preview service maximal rate information, preview service audio attribute information and the preview services video attribute information of the preview information whether service occurs, preferred preview information on services, preview service.

Preferably, in the stream forwarding step, be sent in the stream by content being divided into a part that shows in the service that at least one or more parts provide and the stream of at least one buffering setting section.

In the present invention on the other hand, a kind of method that receives broadcast data, reception comprises the service discovery information grouping of the information of relevant service, and be extracted in the information that comprises in the described grouping, the information that storage is extracted from described grouping, and use institute's canned data to carry out channel map (channel map), and use described channel map to receive the stream that is used for described service.

Preferably, in the stream receiving step, receive and show the stream of the service that is used for the demonstration request channel on the screen, and receive and cushion the stream of the service that is used at least one buffering setting contents of channel.Here, described buffering setting contents of channel comprises at least one channel of selecting from following group, and described group comprises the adjacent channel that shows the request channel, watches channel, user's special use to watch reserved channel and user's preference channel in advance.

Preferably, in the stream receiving step, on screen, receive and be presented at by being divided into the stream of the current display part in the content service that at least one or more parts provide, and receive and cushion the stream of at least one buffering setting section.

Preferably, described information about service comprises the information about the preview service of main service and main service.Here, in the stream receiving step, receive the stream that is used for the preview service.

More preferably, described method also is included in the step of the preview service that demonstration receives on the screen.

More preferably, described method comprises also whether reception watches the step of the main service of shown preview service.

More preferably, described method also is included in channel shows the preview service that receives between transfer period step.

More preferably, described method also comprises the step of the preview service that buffering receives.

More preferably, described preview information on services comprises at least one information of selecting from following group, described group DVB three metamessages, preview service access address information, preview service maximal rate information, preview service audio attribute information and the preview services video attribute information that indicates whether to exist to the information that provides of preview service, first-selected preview information on services, preview service is provided.

More preferably, the grouping of described service discovery information comprises the information of relevant at least one preview service.

More preferably, described stream comprises at least one preview service.

In another aspect of this invention, a kind of broadcasting receiver comprises: the service discovery manager, be used to receive the service discovery information grouping of the information that comprises relevant service, and be extracted in the information that comprises in the described grouping; The service information data library unit is used to store the information of extracting from described grouping; Domain channel manager is used to use institute's canned data to produce channel map, and manages described channel map; And application/UI manager, be used to use described channel map to receive the stream that is used for described service.

Preferably, the reception of application/UI manager is used to show the stream of the service of asking channel, shows described stream on screen, receives stream of the service that is used at least one buffering setting contents of channel, and controls the described stream that will be cushioned.

Preferably, described broadcasting receiver also comprises memory cell, is used to receive and store the stream of the service that is used for described buffering setting contents of channel.

Preferably, described application/UI manager receive at least one buffering setting section of the content service that is divided at least one part stream, show described stream, receive the stream of at least one buffering setting section, and the control described stream that will be cushioned.

Preferably, described information about service comprises about the information of main service and the information of relevant main preview service of serving.Here, described application/UI manager use the control of described channel map be used for the preview service with received stream.

More preferably, the preview service that described application/control of UI manager is received is displayed on the screen.

More preferably, described application/UI manager shows the preview service that is received at channel on screen between transfer period.

More preferably, described application/UI manager shows the preview service of selected channel in advance on screen, and whether control watching the main service of selecteed selected channel occur.

Correspondingly, the invention provides following effect and/or advantage.

At first, can provide preview via the information of the service that relevant service provider provided.And, can carry out the multichannel buffering.

The second, the user can use the preview that comprises in the information of the service that provides relevant service provider to check service content in advance.

The 3rd, use the preview that is provided to reduce and realize that channel switches required time.

The 4th, the user can use described preview to come channel searching before watching main service.

The 5th, reduces and be used for the required time of channel switching by carrying out the multichannel buffering, the broadcasting that the user can the direct viewing dedicated channel.

The 6th, can select by scene unit in the situation of single content, the user is from described content choice special scenes, and the selected scene of direct viewing then.

It is exemplary and indicative to should be appreciated that the general remark of front of the present invention and following detailed description are, and is intended to further explanation is provided as the present invention for required protection.

Description of drawings

Accompanying drawing is included to provide to further understanding of the present invention, and in this application combined and constitute its part, and accompanying drawing illustrates embodiments of the invention and is used from specification one explains principle of the present invention.In the drawings:

Fig. 1 is the chart of IPTV system in accordance with a preferred embodiment of the present invention;

Fig. 2 A and Fig. 2 B are the summary chart of multicast and unicast scheme respectively;

Fig. 3 is the flow chart of service discovery process;

Fig. 4 is the structure chart of broadcasting discovery record in accordance with a preferred embodiment of the present invention;

Fig. 5 is the structure chart of preview service element (element) in accordance with a preferred embodiment of the present invention;

Fig. 6 is the chart that utilizes the preview element of XML (extend markup language) expression according to the present invention;

Fig. 7 A is the form that is used to broadcast the discovery record according to of the present invention to 7C;

Fig. 8 is the block diagram of broadcasting receiver according to a preferred embodiment of the present invention;

Fig. 9 is the flow chart of signal processing in accordance with a preferred embodiment of the present invention;

Figure 10 A is the flow chart that is used to handle the preview service method according to a preferred embodiment of the present invention to 10C;

Figure 11 A is the summary chart that is used to set the menu that cushions channel in accordance with a preferred embodiment of the present invention;

Figure 11 B is the summary chart that is used to select to keep the menu of watching channel in accordance with a preferred embodiment of the present invention;

Figure 12 is the flow chart of signal processing according to another embodiment of the present invention;

Figure 13 is the chart of the IP system of another preferred embodiment according to the present invention;

Figure 14 is the form of BCG discovery record in accordance with a preferred embodiment of the present invention;

Figure 15 is the form of the information of relevant preview content in accordance with a preferred embodiment of the present invention;

Figure 16 is the form of the definition of the preview medium type in the form of the information of relevant preview content according to the present invention;

Figure 17 and Figure 18 explain that broadcasting receiver according to the present invention shows the chart of preview content on screen;

Figure 19 is the flow chart of the signal processing method of another preferred embodiment according to the present invention; And

Figure 20 is the flow chart of the signal processing method of another preferred embodiment according to the present invention.

Embodiment

Now will be in detail with reference to the preferred embodiments of the present invention, the example illustrates in the accompanying drawings.In institute's drawings attached, will use the same reference numeral to quote identical or similar part as far as possible.

And the term of selecting to be widely used at present is as the term that is used for the disclosure of invention.In some cases, be used to describe the present invention by the optional term of applicant.For this reason, in the detailed description of appropriate section, stipulated accurately or correct implication.Therefore, should be appreciated that optional term not only is interpreted as the term name that is used for the disclosure content simply, but also be understood that the implication of corresponding term.

In the following description, with the operation that is elucidated in more detail with reference to the drawing according to a kind of broadcasting receiver of the present invention, broadcast data transmitting method and broadcast data receiving method.

At first, IPTV (Internet Protocol TV) system as using internet network that the system example of various contents is provided, can mainly comprise server, network and receiver (client).

The server of IPTV system can comprise the server of being responsible for various functions, for example Fu Wufaxian ﹠amp; Select server, streaming server, content guide information server, client information server, payment information server etc.

In above server, streaming server sends the moving image data of being stored that utilizes codings such as MPEG2 (Motion Picture Experts Group 2), MPEG4 via network to the user.About being used for the agreement of described transmission, can use RTP (RTP), RTCP (RTP Control Protocol) etc.

In the situation of using RTSP (real-time streaming protocol), can for example suspend by being called as the function of special play-back (trick play), reset, stop to wait and control live image to a certain extent and flow back to and put.Above agreement only is exemplary, and according to implementing to require also available other RTP.

The content guide information server provides the server of the information of relevant various contents.In this case, content guide information is the information corresponding to EPG (electronic program guides) information, and comprises various information.Content guide information server stores content guide information data and the data of being stored are provided to receiver.

Described Fu Wufaxian ﹠amp; Select server to provide the relevant link information that the server of various content services is provided for receiver, described content service is for example broadcasted, COD (on-demand content), recreation etc., playback of information etc.

Described network system comprises based on the network of internet and gateway.A kind of in the various IP-based network be can use based on the network of internet, fiber cable network, coax network, FTTH (fiber is to the family), telephone network, wireless network etc. comprised.Described gateway can use for example agreement execution multicast group management of IGMP (Internet Group Management Protocol), carries out QoS (service quality) management etc., and carries out the general data forwarding.

The IPTV receiver means the receiver that can receive the data of transmitting via internet network and received data is provided to the user then.Described receiver comprises among IPTV set-top box, home network gateway, the embedded TV of IPTV (IPTV embedded TV) etc.

In the situation of mixed type IPTV system, can provide various internet contents and various traditional broadcast content.Especially, can provide the various broadcasted contents that comprise terrestrial broadcasting, cablecast, satellite broadcasting, personal broadcaster etc., various the Internet images contents, the data content except that image or the like to the user.And, can be in real time or according to request with need these contents are provided.

Fig. 1 is the chart of IPTV system in accordance with a preferred embodiment of the present invention.

With reference to figure 1, providing aspect the content service, this IPTV system can comprise content supplier (CP), service provider (SP), network provider (NP) and user.

Described content supplier produces the various contents that will be provided.To described in the explanation of Fig. 1, described content supplier can comprise in terrestrial broadcasters (terrestrialbroadcaster), cablecast service provider (cable system operators (SO) or MSO (multisystem operator)), satellite broadcasting company, the Internet Broadcast company etc. as in front.

Described service provider will be become service packet and described service packet will be provided then by the content packaging that content supplier provides.For example, the service provider shown in Fig. 1 is with packings such as first terrestrial broadcasting, second terrestrial broadcasting, cable mso, satellite broadcasting, various Internet Broadcasts and provide the broadcasting of being packed to the user then.

Described service provider uses clean culture or multicast scheme to provide service as the user.Fig. 2 A and Fig. 2 B are respectively the summary charts that is used for multicast scheme and unicast scheme.In unicast scheme, between individual transmitter and single receiver, transmitted data according to 1: 1.For example, in the situation of unicast scheme, if receiver to the server requests data, then server sends described data in response to described request to receiver.In multi-cast system, data are sent to a plurality of receivers of particular group.For example, server can be once sends data to the receiver of a plurality of pre-registrations (pre-registered).For multicast registration, can use IGMP (Internet Group Management Protocol).

Described network provider is provided for providing to the user network of described service.The user also can be by the network that founds a family (home network end subscriber: HNED) receive described service.

For the device that is used for protecting the content of transmitting in the IPTV system, can service condition receive (conditional access), content protecting etc.For example, the condition that can be used to such as strain relief clamp (CableCard), DCAS (can download condition receiving system) receives or content protecting.

Fig. 3 is the flow chart of service discovery process.

With reference to figure 3, in order to make the IPTV receiver provide content to the user, receiver is found wherein to store the server of user's dedicated content and is visited the server of being found then.In order to find described content server, receiver can be provided by the entrance (entry point) (perhaps system operator (SO)) [S300] of the IPTV door (portal) that is provided by network provider.In this case, described entrance means a kind of access location.

User's input is used for the IP address or DNS (domain name system) URL (URL(uniform resource locator)) of the entrance of described IPTV door, perhaps selects input pre-registration address etc.Alternatively, receiver can be visited preselected visit etc. automatically.

Record is found for receiver provides the service provider in the entrance of IPTV door, and described service provider finds to write down the information [S310] that contains relevant each service provider.In this case, described service provider finds to write down the various information that contain relevant service provider.For example, described various information contains service provider's identifying information, link information etc.

Described receiver uses the service provider who is received to find that the information that writes down visits the service provider's that user's service-specific is provided server.And described service provider provides the service discovery record [S320] of the information that contains related content for receiver.In this case, described service discovery record contains the various information of related content service.In this case, for example, described service discovery writes down the reference address of the service server (service server) that contains memory contents etc.

The service discovery record that described receiver storage is received.Described receiver uses the information of described service discovery record to visit the service server of the content supplier that user's dedicated content is provided, and receives stream from described service server then.(perhaps, the content that is provided by different service servers in) the situation, the information that described receiver reuses the service discovery record of being stored visits the service server of content corresponding provider attempting to watch the content that provides on the different channel.

If service server provides the preview service, the information of then relevant preview service should be provided for described receiver.In this case, described preview service can comprise the trailer (trailer) of main service, the service that utilization is constructed than main data size of serving littler screen size etc.Use the receiver of record separately though the information of relevant preview service can be sent to, what present embodiment was described is, during the service discovery that is included in relevant main service by the information with relevant preview service writes down and with its transmission.

Fig. 4 is the structure chart of broadcasting discovery record in accordance with a preferred embodiment of the present invention.

With reference to figure 4, broadcasting finds that record is in being write down by the service discovery that the service provider provides, and is the recording of information that is used for transmitting relevant live (live) media broadcast services.

In the situation of the preview service that is provided for live media broadcast services, can be included in by information relevant preview service broadcasting find to write down in and with its transmission.

Find record about broadcasting, except MPEG (Motion Picture Experts Group) PSI (program specific information) (program specific information), exist ' the TS-Full SI ' and do not use ' the TS-Optional SI ' of (in-band) SI in the band of DVB SI (information on services) that use comprises in the TS of sequence (transport stream).

' TS-FULL SI ' can be used for actual situation via IP network transmission traditional broadcast data.Therefore, only be provided for broadcasting discovery record for receiving the desired information of TS, and the DVB SI that can comprise obtains the information of relevant each service from TS.' TS-OptionalSI ' can be used for the situation via IP network transmission data the SI in band.Therefore, about the SI of each service with the positional information of service be included in broadcasting and find in the record.' broadcasting of TS-Optional SI ' finds to be equivalent to ' the broadcasting discovery of TS-Full SI '.Yet ' TS-Optional SI ' is different from ' TS-FullSI ' at SI aspect whether existing.

Fig. 4 roughly illustrates to broadcast the structure of finding record and the element that comprises in described record.Element by the solid line signal is essential, and the element of being illustrated by dotted line is optional.For example, comprise ' SI ' element in optional mode.And ' SI ' element is included in the broadcasting of ' TS-OptionalSI ' and finds in the record.

Broadcasting shown in Fig. 4 finds that record comprises ' ServiceLocation ' element that contains service position information, ' TextualIdentifier ' element that contains the original text identifying information, ' DVBTriplet ' element that contains three metamessages, ' MaxBitrate ' element that contains maximal rate information, ' AudioAttributes ' element that contains audio attribute information, ' VideoAttributes ' element and ' PreviewService ' element that contains the preview information on services of containing video attribute information.The element of being illustrated only is exemplary.Necessary element can also be comprised and unnecessary element can be removed.

The information of relevant preview service is included in ' PreviewService ' element.' PreviewService ' element comprises ' preferred ' attribute, this attribute contains the information that whether exists relevant for preferred (preference), ' ServiceLocation ' element contains preview service position information, ' DVBTriplet ' element contains three metamessages of preview service, ' MAxBitrate ' element contains the maximal rate information of preview service, ' AudioAttributes ' element contains the audio attribute information of preview service, and ' VideoAttributes ' element contains the video attribute information of preview service.Similarly, the element of being illustrated only is exemplary.Necessary element can also be comprised and unnecessary element can be removed.

Fig. 5 is the structure chart of preview service element in accordance with a preferred embodiment of the present invention.

With reference to figure 5, the preview service element comprises ' preferred ' element, ' ServiceLocation ' element, ' DVBTriplet ' element, ' MAxBitrate ' element, ' AudioAttributes ' element and ' VideoAttributes ' element.

' ServiceLocation ' element comprises ' IPMulticastAddress ' element that contains multicast address information, and ' RTSPURL ' element, should ' RTSPURL ' element contains to be useful on the address information that service is provided according to RTSP (real-time streaming protocol).In the situation that includes ' DVBTriplet ' element, described element comprises ' OrigNetId ' element that contains network ID (identifier) information, ' TSId ' element that contains TS (transport stream) id information, and ' ServiceId ' element, be somebody's turn to do the id information that ' ServiceId ' element contains the identity that identifies in another included from TS service.

Fig. 6 is the chart that utilizes the preview element of XML (extend markup language) expression according to the present invention.

With reference to figure 6, can observe relevant information shown in Figure 6 with reference to figure 4 described elements.In described information, ' minOccurs ' means minimum occurrence frequency (minimumoccurrence frequency) and ' maxOccurs ' means maximum occurrence frequency.If maximum occurrence frequency is ' unbounded (infinitely) ', then occurrence frequency is not carried out any restriction.

Fig. 7 A is the form that is used for finding according to broadcasting of the present invention record to 7C.

Described single record from Fig. 7 A to 7C, considered the accompanying drawing size and its division is come.Fig. 7 A has found record description according to the details of each element of the structure shown in Fig. 4 to the broadcasting shown in the 7C.Unlike the record shown in Fig. 4, Fig. 7 A finds that to the broadcasting shown in the 7C record also comprises about the element of forward error correction (FEC) with about the element of service availability, but does not comprise the SI element therein.' in the situation of TS-Optional SI ', can also further comprise the SI element.

It is ' BroadcastDiscovery ' to the broadcasting of the type of 7C that Fig. 7 A is provided, and service list information is included in ' BraodcastDiscovery/ServiceList '.

If there is the identifying information of the BCG record of finding about BCG (broadband content guide), then ' ServiceDescriptionLocation ' comprises this identifying information.And ‘ @preferred ' comprises the positional information of preferred BCG.In this case, BCG means the content guide information corresponding to EPG (electronic program guides).

The information of various relevant services is included in ' braodcastDiscovery/ServiceList/SingleService '.

' TextualIdentifier@DomainName ' comprises the internet DNS domain-name information that is used to discern the service provider, and ' TextualIdentifier@ServiceName ' comprises the host name information of the service that the service provider provides.

' DVBTriplet ' comprises the DVB Triplet information of relevant service.In ' DVBTriplet ', ' DVBTriplet@OrigNetId ' comprises that primitive network ID (original_network_id) information, ' DVBTriplet@TSId ' comprise transport stream ID (transport_stream_id) information, and ' DVBTriplet@ServiceId ' comprises service ID (service_id) information.And ' MaxBitrate ' comprises the maximal rate information of the stream of the service of transmission.

The information of relevant service position is included in ' among the BroadcastDiscovery/ServiceList/SingleService/ServiceLoca tion '.And, should comprise at least one IP multicast address (IPMulticastAddress) information or RTSPURL information below.

' IPMuliticastAddress@Source ', ' IPMuliticastAddress@Address ' and ' IPMuliticastAddress@Port ' comprise that indication uses IGMP (Internet Group Management Protocol) visiting the information of described service, and comprise the information of the URL and the port of accessible services.' IPMulticastAddress@Streaming ' comprises indication alternatively, and it is the information of utilizing the stream of RTP or utilizing the stream of direct UDP (User Datagram Protoco (UDP)).

' RTSPURL ' indication uses RTSP (real-time streaming protocol) with access services, and comprises the information of the URL of relevant addressable described service.

' FECBaseLayer@Address ' and ' FECBaseLayer@Port ' comprise the information of relevant IP multicast address and udp port respectively, and the basic layer of FEC (forward error correction) (FECBase Layer) information (SMPTE-2002-1) is positioned at this IP multicast address place.Similarly, ' FECEnhancementLayer@Address ' and ' FECEnhancementLayer@Port ' comprise the information of relevant IP multicast address and udp port respectively, and FEC (forward error correction) enhancement layer (FEC Enhancement Layer) information (Raptor) is positioned at this IP multicast address place.

' FECMaxBlockSizePackets ' comprises relevant to first grouping block (packetblock) information of the largest block number of the source grouping (source packet) that sends of grouping block to the end, and FECMaxBlockSizeTime ' comprises the information of the maximum transmission time of relevant FECC grouping block.' FECObjectTransmissionInformation ' comprises the transmission information of the FEC object (FEC object) that is used for speed dragon sign indicating number (Raptorcode).

' AudioAttributes ' comprises the information about the audio coding algorithm that will be used to described service and purpose, and ' VideoAttributes ' comprises the relevant details that will be used to the video coding of described service.

The information of relevant preview service is included in ' PreviewService ', ′ @preferred ', ' DVBTriplet@OrigNetId ', ' DVBTriplet@TSId ', ' DVBTriplet@ServiceId ', ' IPMuliticastAddress@Source ', ' IPMuliticastAddress@Address ', ' IPMuliticastAddress@Port ', ' RTSPURL ', ' MaxBitrate ', ' AudioAttributes ' and ' VideoAttributes ' in.

' PreviewService ' comprises the information of the preview service that indicates whether to provide described service.Can provide at least one preview service for main service.Therefore, ' ′ @preferred ' comprise indication it be this at least one or more previews service in one information more preferably.

Providing based on TS in the situation of service, can transmit several preview services by single TS.Especially, if use MPTS (MPTS) that a plurality of preview services are provided, then must differentiate each the preview service that in TS, comprises.Differentiate available DVB three metamessages about many preview services.

' DVBTriplet ' comprises the DVB Triplet information of relevant preview service.In ' DVBTriplet ', ' DVBTriplet@OrigNetId ' comprises network ID information, and ' DVBTriplet@TSId ' comprises the TS id information, and ' DVBTriplet@ServiceId ' comprises service ID information.Use network ID information, TS id information and service id information, can differentiate each the preview service that in TS, comprises.If transmit single preview service, then in record, can not comprise DVB three metamessages by single TS.

The information of relevant preview service position is included in ' among the BroadcastDiscovery/ServiceList/SingleService/PreviewServ ice/ServiceLocation '.

' IPMuliticastAddress@Source ', ' IPMuliticastAddress@Address ' and ' IPMuliticastAddress@Port ' indication use IGMP (Internet Group Management Protocol) with visit preview service, and comprise about the URL of addressable preview service and the information of port.' IPMulticastAddress@Streaming ' comprises the information of indicating it to utilize the stream of RTP or utilizing the stream of direct UDP (user data newspaper agreement) alternatively.

' RTSPURL ' indication uses RTSP (real-time streaming protocol) with visit preview service, and comprises the relevant information that can visit the URL of described service.' MAxBitrate ' comprises the maximal rate information of the stream of the service of transmission.

' AudioAttributes ' comprises the information about the audio coding algorithm that will be used to described preview service and purpose.And ' VideoAttributes ' comprises the relevant information that will be used to the video coding of preview service.

' ServiceAvailability ' provides the tabulation about the sub-district relevant with main service (perhaps zone).According to what give tacit consent to, all can use all single services (singleservices) anywhere.' CountryCode ' comprises about defining the information of the country of availability for it.‘ @Availability ' comprises that indication is by whether serving information available described in the country of ' CountryCode ' regulation.' Cells ' comprises the information of the geographic area of expression ' CountryCode ' defined.

In 7C, ' M ' in right column is that mark and ' O ' in right column of the essential element of indication (mandatedelement) is the mark of indicating the element that is comprised alternatively at Fig. 7 A.

Described receiver receives Fig. 7 A to the service discovery record shown in the 7C, and it can obtain the information of relevant preview service then.

Fig. 8 is the block diagram of broadcasting receiver in accordance with a preferred embodiment of the present invention.

With reference to figure 8, receiver can comprise the separate type tuner (separate tuner) that is used to receive terrestrial broadcasting, cablecast, satellite broadcasting etc.For clearly and be convenient to describe the present invention, the main in the following description part that is used to handle via the content of Internet transmission of explaining.

Receiver comprises network interface unit 802, IP manager 804, application/UI manager 806, CM unit 808, information on services decoder 810, service information data library unit 812, service discovery manager 814, service control manager 816, CAS/DRM unit 818, service transfer management device (service delivery manager) 820, demodulation multiplexer 822, audio/video decoder 824, display unit 826, memory cell 828, system administration manager 830, storage medium control unit 832 and storage medium 834.

Network interface unit 802 receives the grouping that receives from network and sends grouping from described receiver to described network.IP manager 804 is managed from the source to the grouping transmission of destination for the grouping that is received by receiver or send.And, IP manager 804 with the branch group categories that received with corresponding to appropriate protocol.

Application/UI (user interface) manager 806 use OSD (screen display) etc. provide GUI (graphical user interface) to the user.Application/UI manager 806 receives the button input from the user, and carries out receiver operation according to described input then.For example, if receive the button input that is used for channel selection from the user, then application/UI manager is to the described key input signal of pressing of CM unit 808 transmission.

Channel map is prepared in CM (domain channel manager) unit 808.CM unit 808 uses described channel map to select channel according to the button input that receives from application/UI manager 806, and control service discovery manager 814 and service control manager 816.CM unit 808 is from the information on services of information on services decoder 810 receiving channelss, and is the audio/video PID (packet identifier) that demodulation multiplexer 822 is set selected channel then.

Information on services decoder 810 is decoded this information on services as PSI (program specific information).Especially, information on services decoder 810 receives by the PSI section (section) behind demodulation multiplexer 822 demultiplexings, PSIP (program and information on services agreement) section, DVB-SI (information on services) section etc., and the section of decoding and being received then.

Information on services decoder 810 is set up database by the Duan Erwei information on services that decoding is received.And the database that is used for described information on services is stored in service information data library unit 812.

Service discovery manager 814 provides the desired information of service provider of selecting to provide service.In the situation that receives the signal that is used for channel selection from application/UI manager 806, service discovery manager 814 finds to use the service of described information.

Service control manager 816 is responsible for selecting and the control service.For example, if the user selects to be equivalent to the direct broadcast service of conventional broadcast system, then serve control manager 816 and use IGMP, RTSP etc. to carry out services selection and control.If the user selects to serve for example VOD (video request program), then serve control manager 816 and use RTSP to carry out services selection and control.RTSP can provide special-effect mode (trick mode) for real-time stream.Described agreement only is exemplary and can uses other agreement according to embodiment.

The grouping that is used for described service that receives via network interface unit 802 and IP manager 804 is transferred to CAS/DRM unit 818.The condition receiving system (CAS) and the digital copyright management (DRM) of service is responsible in CAS/DRM unit 818.

Service transfer management device (service delivery manager) 820 is responsible for the control service data.For example, in the situation of control real-time streaming data, can use RTP/RTCP (RTP/RTP Control Protocol).In the situation of using RTP transmitting realtime stream data, service transfer management device 820 is resolved the packet that is received according to RTP, and the grouping after demodulation multiplexer 822 transmission are resolved then.Service transfer management device 820 is to the server side feedback network reception information that service is provided.

Demodulation multiplexer 822 is audio frequency, video, PSI (program specific information) data etc. with the packet signal demultiplexing that is received, and then with the transfer of data behind the demultiplexing to video/audio decoder 824 and service information decoding device 810.

824 pairs of video and voice datas that receive from demodulation multiplexer 822 of video/audio decoder are decoded.Offered the user via display unit 826 by video/audio decoder 824 decoded video datas.And decoded voice data is offered the user via the loud speaker (not shown in FIG.).

What memory cell 828 storage was used for described system is provided with data etc.Memory cell 828 can comprise non-volatile ram (NVRAM), flash memory etc.And system administration manager 830 is by the overall operation of power supply receiver control system.

Storage medium control unit 832 control of video/voice data is stored in the storage medium 834, and perhaps the data of control store in storage medium 834 are to read and playback it.Storage medium 834 is from video/audio decoder 824 receiver, videos/voice data, and stores the video/audio data that is received then under the control of storage medium control unit 832.

The entrance of receiver visit IPTV door, and receive the service provider then and find the grouping of writing down.The grouping that network interface unit 802 is received to 804 transmission of IP manager.IP manager 804 checks whether the destination of the grouping that receives is receiver, and according to transmission/reception agreement described transmitted in packets is arrived appropriate managerial device piece (manager block) then.

Use and service discovery and select relevant agreement to transmit to contain the service provider to find packets of information.For example, in the situation of DVB-IP, according to SD﹠amp; S (Fu Wufaxian ﹠amp; Select) agreement (perhaps service discovery protocol: SDP) transmit described grouping.Therefore, IP manager 804 contains the service provider to service discovery manager 814 transmission and finds packets of information.

Service discovery manager 814 is resolved the grouping that is received, and obtains the service provider then and find the various information that write down.Service discovery manager 814 is to the described information of service information data library unit 812 transmission.Described information is stored in the service information data library unit 812 then.

Described receiver can use the service provider's who comprises in the service provider finds to write down link information to come to receive the grouping that contains service discovery information from the service provider.Use SD﹠amp; S agreement (perhaps SDP) comes transmission to contain the grouping of service discovery information.

The service discovery record comprises that broadcasting is found to write down, CoD (on-demand content) finds record, grouping is found to write down, BCG finds record etc.Suppose in service discovery record, the described broadcasting that contains the information of preview service find record (as with reference to figure 7A to described in the above stated specification of 7C) be received.

Contain broadcasting and find that packets of information is transferred to IP manager 802 via network interface unit 802.IP manager 804 checks whether the destination of the grouping that receives is receiver, and then described transmitted in packets is arrived service discovery manager 814.Service discovery manager 814 obtains broadcasting discovery information from the grouping that is received.Service discovery manager 814 is to the described information of service information data library unit 812 transmission.Therefore, described information is stored in the service information data library unit 812.

The various information that receive are stored and managed to service information data library unit 812.CM unit 808 uses the various information of storage in service information data library unit 812 to produce and the managing channel mapping.

Application/UI manager 806 receives channel information corresponding to dedicated content from the user, and according to described channel map channel is switched then and control.Especially, the channel information that application/UI manager 806 receives corresponding to user's dedicated content, and then can switching channels.

Find that in the above-mentioned broadcasting that receives the information that contains relevant preview service described receiver is stored described information in the situation of record in service information data library unit 812, and produce then and the managing channel mapping.

The address of the main service of described receiver visit storage, and the address of storage preview service, and can be provided to main service and preview service then.Yet, in single main service, having in the situation of a plurality of preview services, it can select preferred preview service according to ' preferred ' attribute.Alternatively, it can select suitable preview service by considering resolution or video attribute according to the option of receiver.Alternatively, the user directly selects the preview service.Alternatively, user preset condition and select corresponding preview service then.

The grouping that contains the data of selected main service and the data that selected preview is served is transferred to demodulation multiplexer 822 via IP manager 804, CAS/DRM unit 818 and service transfer management device 820.

CM unit 808 carries out demultiplexing by control demodulation multiplexer 822 under the control of application/UI manager 806 to the grouping that contains main service data and preview service data.CM unit 808 uses control demultiplexings such as PID (packet ID), reference address.If receive at least one the preview service (MPTS) that in single TS, comprises, then can use DVB three metamessages to discern the preview service that is included among the TS.

Service data behind the audio/video decoder 824 decoding demultiplexings, and then it is presented on the display unit 826.Under the control of storage medium control unit 832, the service data behind the demultiplexing is stored in the storage medium 834.

Can with main service on screen, show and the preview service perhaps can on screen, show the preview service discretely with main service.For example, when on main screen, showing main service, can use PIP or screen to separate (screen partition) and at least one preview service that shows on the screen on the different channel.

By for example showing the preview service on EPG and the BCG at the content guide image, make the user can obtain services selection information fully with information on services ground.

As described in the above description, can on screen, show the preview service or can use described preview service execution fast channel search and switching.For example, during the service on watching dedicated channel in the situation of switching channels, receiver should be visited and be served institute's address stored on the switching channels.

The situation that above channel switches takes place in, the address that the 806 visit storage previews of applications/UI manager are served, and the main service institute address stored of switching channels.If the preview service is lower than main service at aspects such as resolution, code checks, then can before main service, receive the preview service by receiver.Therefore, before main service was received and is displayed on the screen, receiver should be presented at the preview service that receives before the main service on the screen.Yet,, also may before the preview service, receive main service according to network configuration.If like this, then be presented at the main service that receives before the preview service on the screen.

Alternatively, the situation that above channel switches takes place in, the address that the 806 visit storage previews of applications/UI manager are served, and the main service institute address stored of switching channels.By at first show the preview service on screen, application/UI manager receives the input whether the indication user will watch described service.Especially, application/UI manager 806 makes the user to determine whether to watch described main service after at first watching the preview service, perhaps carries out channel and switches to switch on the different channels.In this case, the user can use the preview service that takies less time of reception to carry out channel search more fast.

In the situation of using the service buffering, can further be reduced time of delay.Especially, by cushioning main service or preview service, can reduce the required time of address of visit stores service.

For example, can be by calling party preference channel in advance, currently watch the adjacent channel of channel, before watched the main address of service of channel, user's setting contents of channel etc. to come buffered data.In this case, if channel is switched to the buffering setting contents of channel, then can direct viewing channel after the buffering.

Alternatively, can cushion the preview service.By calling party preference channel in advance, currently watch the adjacent channel of channel, before watched the preview address of service of channel, user's setting contents of channel etc. to come buffered data.And the data after the buffering can be directly used in above-mentioned channel and be switched or channel search.

In the situation of using buffering, at the PID that in demodulation multiplexer 822, sets the grouping that contains the service that to be cushioned under the control of CM unit 808.Described service is cushioned and is stored in the storage medium 834.Alternatively, can be for cushioning the buffer storage that provides independent.Alternatively, can use the transport address of service to carry out buffering.

Fig. 9 is the flow chart of signal processing in accordance with a preferred embodiment of the present invention.

Fig. 9 is illustrated between service server and the service provider server and in the entrance of IPTV door and the stream (flow) and the sequence of the signal between the receiver.In this case, service server means and wherein stores substantial service server.

With reference to figure 9, receiver is provided by the entrance [S902] of the IPTV door that is provided by network provider.The IPTV door can be checked the ordering information (subscriptioninformation) of institute's visit receiver.Especially, by checking ordering information etc., can check that whether described receiver is the receiver that can be provided to the service that is associated with described IPTV door.

The entrance of IPTV door comprises that to the receiver transmission service provider of related network provider or service provider's various information finds record [S904].

Receiver is stored in the various information [S906] that the service provider who is received comprises in finding to write down.In this case, described information can comprise service provider's identifying information, service provider's link information etc.

Described receiver uses the link information of relevant service provider in described information to visit service provider's server [S908].If there is the receiver visit, then service provider's server comprises the service discovery record [S910] of the various information of relevant service to the receiver transmission.

Described receiver receives the service discovery record, and is stored in the various information [S912] that comprise in the described record then.In this case, described information can comprise content supplier's identifying information, content sources identifying information, content substance identifying information (content substance identificationinformation), the characteristic information of content-data, the link information of service etc.In the situation of the preview service that is provided for described service, can comprise the information of relevant described preview service.Described receiver uses described information to produce channel map.

Described receiver uses channel map to visit the service server [S914] of storage respective service.Described service means the main or preview service of corresponding channel.Described receiver can only be visited the server of the main service of storage or can only be visited the server of storage preview service.

Described service server starts stream service [S916] by data flow from the service of being stored to accessed receiver that transmit.Described receiver shows the main and preview service that receives from described service server on screen, perhaps use EPG, BCG etc. to show main service and preview service [S918] individually on screen.Alternatively, switch for channel or channel search shows described preview service on screen.

Figure 10 A is the flow chart that is used to handle the preview service method in accordance with a preferred embodiment of the present invention to 10C.

Figure 10 A is illustrated in and receives and handle the preview service method in the receiver.

With reference to figure 10A, ask to use the content guide of EPG and BCG for example to select to be used to provide the channel [S1000] of service-specific according to the user.If described channel is selected, whether the preview service that then determines described channel to provide exists, and is applicable to whether the preview service of receiver option exists [S1002].Can use video attribute or audio attribute to decide described preview service whether suitable.

As the result of deciding step S1002, if there is suitable preview service, then the service server [S1004] of described preview service is stored in visit.Can use above-mentioned service discovery record to wait the address that receives service server in advance.As the result of deciding step S1002, if there is no suitable preview service does not then show the preview service on screen.

Described receiver access services server, and receive the preview service then.Whether the preview service that described receiver decision is received is corresponding to the many previews service [S1006] that receives to comprise at least one preview service manner in single stream.For example, can receive it by several previews service being included in the single transport stream (TS).

As the result of the decision of in step S1006, making,, then be the preview service search preview service [S1008] of selected channel if it is many previews service.Can use certain identifying information, for example DVB three metamessages are found the preview service of selected channel.If find the preview service of selected channel, then on screen, show described preview service [S1010].

As the result of the decision of in step S1006, making,, then receive single preview service if it is not many previews service.Therefore, on screen, show the single preview service [S1010] that is received.

Figure 10 B is a flow chart of handling the another kind of method of preview service according to an embodiment of the invention.Figure 10 B illustrates the process that is used for receiving and showing the preview service during the receiver switching channels on screen.

With reference to figure 10B, answer request that the user makes or the like to switch the channel [S1020] of the service-specific that will watch.Described receiver use service discovery information etc. visits the service server [S1022] of switching channels.

Whether the described receiver decision preview that switching channels provided service exists, and is applicable to whether the preview service of receiver option exists [S1024].Can use video attribute or audio attribute to decide described preview service whether suitable.

As the determination result of step S1024, if there is suitable preview service, then the service server [S1026] of preview service is stored in visit.Can use above-mentioned service discovery record to wait the address that receives service server in advance.In this example, in order to know and to be convenient to explanation, have the step of the service server of visiting switching channels and the step of the preview service server of visit switching channels.Alternatively, described receiver can side by side be handled two accessing steps.

As the result of deciding step S1024, if there is no suitable preview service does not then show the preview service on screen.Receiver is waited for until the main service that receives switching channels.If receive main service, then receiver shows the main service that is received on screen.

Receiver access services server, and receive the preview service then.Whether the preview service that described receiver decision is received is corresponding to many previews service [S1028].

As the result of the decision of in step S1028, making,, then from the preview service, find the preview service [S1030] of selected channel if it is many previews service.Can use certain identifying information, for example DVB three metamessages are found the preview service of selected channel.If the preview service of selected channel is found, then showing on the screen that the preview service is presented at [S1032] on the screen until the main service that receives switching channels and with it.

As the result of the decision of in step S1028, making,, then receive single preview service if it is not many previews service.Therefore, showing on the screen that the single preview service that is received is received and is displayed on [S1032] on the screen until the main service of switching channels.

Figure 10 C is a flow chart of handling the another kind of method of preview service according to an embodiment of the invention.Figure 10 C illustrates and is used for the process of using the preview service to come channel searching at receiver.

With reference to figure 10C, come switching channels according to user's request, for example EPG and BCG select to provide the channel [S1040] of service-specific perhaps to use content guide.If described channel is switched or is selected, whether the preview service that then determines described channel to provide exists, and is applicable to whether the preview service of receiver option exists [S1042].Can use video attribute or audio attribute to decide described preview service whether suitable.

As the result of deciding step S1042, if there is suitable preview service, then the service server [S1044] of preview service is stored in visit.Can use above-mentioned service discovery record to wait the address that receives service server in advance.As the result of deciding step S1042, if there is no suitable preview service, then demonstration preview service on screen is still switched or the main service of selected channel directly is presented on the screen.

Described receiver access services server, and receive the preview service then.Whether the preview service that described receiver decision is received is corresponding to the many previews service [S1046] that receives to comprise at least one preview service manner in single stream.

As the result of the decision of in step S1046, making,, then be the preview service search preview service [S1048] of selected channel if it is many previews service.Can use certain identifying information, for example DVB three metamessages are found the preview service of selected channel.If found the preview service of selected channel, then described preview service is displayed on [S1050] on the screen.

As the result of the decision of in step S1046, making,, then receive single preview service if it is not many previews service.Therefore, the single preview service that is received is displayed on [S1050] on the screen.

The user uses the preview service that shows on screen to import the main service [S1052] of whether watching described channel.If watch the order of the main service of main channel to be transfused to, then the main service of selected channel is displayed on [S1054] on the screen.Yet,, can select once more or handed over service channel [S1040] if do not watch the main service of selected channel.

Simultaneously, the receiver shown in Fig. 8 cushions that at least one channel and user attempt to watch watches channel (viewing channel), perhaps cushions at least one scene part.And, can set described buffering channel (buffering channel) via menu.

Figure 11 A is the summary chart that is used to set the menu that cushions channel in accordance with a preferred embodiment of the present invention.

With reference to figure 11A, if via the input equipment that offers screen, for example remote controller, keyboard, roller (jog dial), touch-screen etc. and input user request, then the setting menu shown in the displayed map 11A on screen.

If make above request, then application/UI manager 806 uses OSD (screen display) setting menu shown in the displayed map 11A on display unit 826.

Left menu shown in Figure 11 A is roughly represented main menu.Described main menu comprises video related setting menu, audio frequency related setting menu ... set menu with buffering.Described video related setting is used for regard to screen ratio, picture quality etc. and sets the entity relevant with video.The audio frequency related setting is used for regard to sound quality, audio channel setting etc. and sets the entity relevant with audio frequency.Buffering is set at least one channel setting that is used for explaining in the above description and partly is set at buffering for buffering or with at least one scene.

Right menu shown in Figure 11 A is roughly represented to set the submenu that menu shows when selected when buffering on screen.And described submenu can mainly be divided into, and the channel buffering is set and the scene buffering is set.

' adjacent channel buffering ', ' before having watched the channel buffering ', ' watching the reserved channel buffering ' (viewing-reserved channel buffering) and ' user's preference channel buffering ' are used to set at least one channel to be cushioned and to set the current menu of watching channel.And ' scene buffering ' is used for providing content by scene unit then sets the menu that at least one scene partly is cushioned if be.

In setting the situation of adjacent channel for buffering, the current adjacent channel of watching channel of receiver buffering.For example, if current channel 3 is viewed, then receiver cushions the last channel of channel 3 and a back channel of channel 3.The last knob down that the user can use a teleswitch waits selects last channel or back one channel, and content that then can the channel that direct viewing cushioned.

Before having watched channel in setting is in the situation of buffering, the channel that described receiver interruptible customer had before been watched.For example, when channel 3 current when viewed, if channel 5 is viewed, receiver buffering channel 5 then.The user can use then and before watch channel button, button waits direct viewing channel 5 backward.

Watching reserved channel in setting is in the situation of buffering, and the receiver buffering has been set the channel of watching reservation for it.Can use another to watch the reservation menu to wait and set the described setting of watching reservation.If the user is switched watching reserved channel to carry out channel, then the user can the direct viewing content corresponding.Yet, set if watch keeping, can on screen, show and inform the message of not watching reservation to set.

Figure 11 B is the summary chart that is used for selecting to keep the menu of watching channel (reserved viewing channel) in accordance with a preferred embodiment of the present invention.

With reference to figure 11B, reference numerals 100,101,102,205 is indicated the channel number of channel respectively.Described receiver shows the channel that can watch on screen.The user then can be for watching specific one in the channel to watch reservation to set.In Figure 11 B, show for channel 102,202 and 205 settings and watch reservation.Therefore, the service corresponding to channel 102,202 and 205 can be cushioned.

In the example shown in Figure 11 B, roughly configure and watch reserved channel to set menu.Yet, can for example EPG (electronic program guides) and BCG (broadband content guide) go up but not are watching reserved channel to set setting on the menu and watching reserved channel at navigation picture.

In setting the situation of user's preference channel for buffering, the preferred channel of described receiver interruptible customer.Can import user's preference channel by preestablishing by the user.Alternatively, can watch custom and automatic setting user preference channel by the channel of analysis user.For example, can for example preestablish preference channel on EPG and the BCG at menu or the navigation picture shown in Figure 11 B.Alternatively, watch custom, preference channel automatically can be set at the channel that the user frequently watches or belong to the channel of the type (for example motion, drama etc.) that the user frequently watches by the channel of analysis user.

In the situation of set scene for buffering, at least one scene part of the content that is provided by scene unit is provided described receiver.The user selects at least one special scenes of described content.Described receiver cushions selected scene part then.If scene unit does not provide described content, then can on screen, show the message of informing that function corresponding is not supported.

In the example of above explanation, can change the number of buffering channel or scene according to embodiment by considering buffer storage or the like.Above-mentioned menu image, form and title only are exemplary, and they are not construed as limiting thought of the present invention.

If buffering channel or scene are set, then application/UI manager 806 uses channel map to visit the address of the content that can send corresponding channel or scene.

The grouping that contains the data that are useful on buffering channel or scene is transferred to demodulation multiplexer 822 via IP manager 804, CAS/DRM unit 818 and service transfer management device 820.Application/UI manager 806 is set PID of the grouping that contains the data that are useful on buffering channel or buffering scene or the like in demodulation multiplexer 822.If like this, then demodulation multiplexer 822 is being stored A/V data with grouping of setting PID or the like in storage medium 834 under the control of storage medium control unit 832, and cushions the A/V data of being stored then.In this example, carry out buffering for the data of storage in storage medium 834.Yet, can use the transport address of service to wait and carry out buffering.

Can change cushion space according to embodiment.And, wait to determine cushion space by the number of considering network state, storage medium space, buffering setting contents of channel (buffering-set channels).For example, if network state is bad, then can increase cushion space.If network state is good, then reduce cushion space, perhaps more multichannel or scene are set in same space and cushion.Can be set by the user described cushion space, buffering number of channels etc.

If the user select in the channel that cushions or the scene one and then input watch order, then applications/UI manager 806 is controlled at the data that cushion in the storage medium 834 with by video/audio decoder 824 direct decodings.

If the user select non-buffering channel or scene and then input watch order accordingly, then can use the mode that channel map is transmitted the address of the content of corresponding channel or scene to receive data with visit.

Figure 12 is the flow chart of signal processing according to another embodiment of the present invention.

Figure 12 is illustrated between service server and the service provider server and in the entrance of IPTV door and the stream and the sequence of the signal between the receiver.In this case, service server means and stores substantial service server therein.

With reference to Figure 12, receiver is provided by the entrance [S1200] of the IPTV door that is provided by network provider.The IPTV door can be checked the ordering information of institute's visit receiver.Especially, by checking ordering information etc., can check that whether described receiver is the receiver that can be provided to the service that is associated with described IPTV door.

The entrance of IPTV door comprises that to the receiver transmission service provider of related network provider or service provider's various information finds record [S1210].

Described receiver is stored in the various information [S1220] that the service provider who is received comprises in finding to write down.In this case, described information can comprise service provider's identifying information, service provider's link information etc.

Described receiver uses the link information of the relevant service provider in described information to visit service provider's server [S1230].If there is the visit of receiver, then service provider's server comprises the service discovery record [S1240] of the various information of relevant service to the receiver transmission.

Described receiver receives described service discovery record, and is stored in the various information [S1250] that comprise in the described record then.In this case, described information can comprise characteristic information, the service link information etc. of content supplier's identifying information, content sources identifying information, content substance identifying information, content-data.Described receiver can use described information to produce channel map.

If the channel information of user input content is so that watch, then receiver uses institute's canned data and channel map to visit the service server of corresponding contents.Set in the situation of buffering channel or scene the user, described receiver is visited the reference address [S1260] of described buffering channel or scene.

Service server is by starting stream service [S1270] to accessed receiver transmitting data stream.Described receiver on screen, show the data that receive from service server, the user imported the content of watching order for it, and cushioned to store the content [S1280] of described buffering setting contents of channel or scene.

Figure 13 is the chart of the IP system of another preferred embodiment according to the present invention.

With reference to Figure 13, transmission system of the present invention comprises content server 1300, preview content server 1310, content guide server (content guide server), SD﹠amp; S (Fu Wufaxian ﹠amp; Selection) server 1330, first gateway 1340, second gateway 1350 and receiving equipment 1360.

The information that content server 1300 is stored a plurality of contents therein and content name is provided and contains the content guide service of explanation for content guide server 1320.

Each the preview content that is used for a plurality of contents is stored in preview content server 1310 in advance.For example, described preview content comprises the audio signal of corresponding contents, the text of corresponding contents, AV (Voice ﹠ Video) signal that is used for the previewer of preview corresponding contents and/or the representative still image of corresponding contents.

Content guide server 1320 is SD﹠amp; S server 1330 provides about the link information of the various servers of specified services is provided via network.Especially, content guide server 1320 is SD﹠amp; S server 1330 is provided for the link information of accessed content server 1300, preview content server 1310 and content guide server 1320.The link information that is provided by content guide server 1320 contains and is useful on the information whether the notice preview content exists, and is used for the authentication information at the described preview content of situation discriminating that has preview content.

The information that the content guide that 1320 storages of content guide server are provided by content server 1300 is served, and playing a role aspect the stored information that the content guide service is provided to receiving equipment 1360.Content guide server 1320 receives the preview content that is used for a plurality of contents from the preview content server, and stores the preview content that is received then.Content guide server 1320 can provide described preview content with the information of content guide service then in the situation of the information that the content guide service is provided to receiving equipment 1360.

SD﹠amp; The link information of the various servers that S server 1330 reception related content guide server 1320 are provided, and store the link information that is received then.And, SD﹠amp; S server 1330 provides the link information of being stored according to the request of being made by receiving equipment 1360 to receiving equipment 1360.

If receiving equipment 1360 is activated, then it is at first to SD﹠amp; S server 1330 request link informations.Especially, receiving equipment 1360 is via first gateway, 1340 visit SD﹠amp; S server 1300, and ask related content server 1300 then, the link information of preview content server 1310 and content guide server 1320.In response to described request, SD﹠amp; S server 1330 provides described link information to receiving equipment 1360.

At receiving equipment 1360 and SD﹠amp; Unicast system is followed in request and transmission to link information between the S server 1330.Therefore, first gateway 1340 is supported clean culture.

Described unicast system is the system that is used for according to 1: 1 transmission information.If described receiving equipment is to SD﹠amp; S server 1330 request link information, then SD﹠amp; S server 1330 in response to described request to the described link information of receiving equipment 1360 transmission.

Receiving equipment 1360 uses IGMP (Internet Group Management Protocol) to be registered to the SD﹠amp of first gateway 1340; The S group.Be registered to SD﹠amp; The receiving equipment 1360 of S group can receive then by SD﹠amp; S server 1330 is by the link information about various servers that multi-cast system provided, playback of information etc.Therefore, first gateway 1340 is also supported multi-cast system.

Multi-cast system makes mass data side by side to be transferred to belong to SD﹠amp; A plurality of receiving equipments 1360 of S group.SD﹠amp; S server 1330 is registered to SD﹠amp by multi-cast system to; The receiving equipment 130 of S group periodically transmits the link information of relevant various servers.

For example, in the situation of DVB-IP (utilizing the digital video broadcasting of Internet Protocol), find that with the BCG (broadband content guide) of the visit information that will contain content guide server 1320 mode that the form of record is transferred to receiving equipment 1360 carries out the transmission of described link information.

Consult ETSI (ETSI) TS (technical specification) 102034, it is the standard of DVB-IP, and the link information of related content guide server 1320 is comprised in the form of BCG discovery record.

In the standard of DVB-IP, described unicast system is conditioned (regulate) for using HTTP (HTML (Hypertext Markup Language)) as being used for SD﹠amp; The SD﹠amp of S server; The S agreement is to provide link information.And described multi-cast system is adjusted to and uses DVBSTP (digital video broadcasting SD﹠amp; The S host-host protocol).

SD﹠amp; S server 1330 uses DVBSTP to send the form that BCG finds record by multi-cast system.

According to the present invention, BCG finds that the form of record contains the information whether the indication preview content exists, and the authentication information that is used for differentiating in the situation that has preview content described preview content.

Receiving equipment 1360 uses at BCG and finds that the link information that contains in the form of record visits content guide server 1320, and the information of request content guide service then.Carry out the request of the information that content guide is served by unicast system.

Receiving equipment 1360 is asked the information of the content guide service of storage in content guide server 1320 via second gateway 1350 that is connected to content guide server 1320.And second gateway 1350 is supported unicast system.

Utilize unicast system, receiving equipment 1360 can be to the information of content guide server 1320 request content guides services, and content guide server 1320 then in response to described request to the information of receiving equipment 1360 transmission content guides services.In the situation of supporting inquiry, receiving equipment 1360 is to the content guide server 1320 essential information of request content guide service optionally, and can optionally be provided with essential information then.

In this case, between content guide server 1320 and receiving equipment 1360, use Simple Object Access Protocol (simple object access protocol), HTML (Hypertext Markup Language) to wait the information of request content guide service, and the information of this content guide service is provided then.

If receiving equipment 1360 inputs are for the request of the information of content guide service, then content guide server 1320 provides the information of content guide service to corresponding receiving equipment 1360.

Provide in the situation of information of content guide service to receiving equipment 1360 at content guide server 1320, content guide server 1320 can with the information of content guide service transmit preview content by 1310 inputs of preview content server.And whether receiving equipment 1360 decision preview contents exist, and need not provide preview content to it by content guide server 1320.Exist in the situation of preview content in decision, thus the next direct accessed content guide server 1320 request preview contents of link information that receiving equipment 1360 is contained in the form of record by using BCG to find.Content guide server 1320 can provide described preview content to receiving equipment 1360 according to described request then.

Figure 14 is the form of BCG discovery record in accordance with a preferred embodiment of the present invention.

With reference to Figure 14, find in the form of record that at BCG BCG provides type (BCGoffering the type) ' form of BCGOffering type ' indication ' BCGDiscovery '.

' BCG ' means the BCG record.

' BCG@Id ' means the identifier of provider/server that BCG is provided.Distribute described identifier by the service provider.

' BCG@version ' means the version information of BCG.If the version information of BCG is modified, then its declaration BCG data is updated.

' Name ' means the title of BCG.The title of BCG can be provided by at least a language.

' Description ' means the explanation to BCG.Can provide explanation by at least a language to BCG.

' Logo ' means the pointer that points to the logo that is used for BCG.

' Type ' comprises the type information of the content relevant with BCG.For example, content type can comprise programme televised live (LiveProgram), COD (on-demand content) or a kind of other type.

' TargetProvider ' comprises the domain-name information about provider, and this provider is the content supplier of describing in BCG.

' TransportMode ' comprises the positional information that is used to find the BCG data.

' DVBSTP ' in ' TransportMode ' comprises the positional information of the BCG that use DVBSTP agreement is provided.

' http@Location ' in ' TransportMode ' comprises the positional information of using the BCG that http protocol provided.

' ' http@SOAP in ' TransportMode ' comprises whether the indication use BCG that http protocol provided uses the information of soap protocol.And acquiescence numerical value is ' false '.

' BCGProviderName ' comprises the name information of BCG provider.

Find that at BCG the present invention also comprises ' PreviewAvailability ' and ' PreviewInformation ' in the form of record.

Whether ' PreviewAvailability ' indication preview content exists.If preview content does not exist, then give tacit consent to numerical value and be ' false '.

And ' PreviewInformation ' is if there is the information of relevant preview content in the indication preview content.

Figure 15 is the form of the information of relevant in accordance with a preferred embodiment of the present invention preview content.

With reference to Figure 15, comprise ' PreviewCategory ', ' PreviewMediaType@id ', ' DisplayMode ', ' Position ', ' Size ', ' StareTime ', ' Duration ', ' PreviewDescription ', ' MediaLocator ' and ' AssociatedMediaLocator ' about the form of the information of preview content.

The type of ' PreviewCategory ' indication preview content is as serial (series), physical culture, action, art etc.

' PreviewMediaType@id ' expression: the preview content indication is used for the intended media Format Type of picture, live image, audio frequency or text.

The display mode of ' DisplayMode ' indication when display media, for example slip (slide), tracking (trail) etc.

' Position ' specifies the position that shows preview content.

' Size ' indication is used to show the size of preview content.

The point zero hour of ' StareTime ' indication preview content.

' Duration ' indication is used to show total duration of preview content.

' PreviewDescription ' is the simple declaration that is used for preview content.

The address that ' MediaLocator ' indication preview content exists.The form of address is URI (uniform resource identifier) (Uniform Resource Identifier), and all host-host protocols are all available.

' AssociatedMediaLocator ' indication utilizes CRID and preview associated content address.

Figure 16 is the form of the definition of preview medium type ' PreviewMediaType@id ', and described ' PreviewMediaType@id ' is arranged in the form of the information ' PreviewInformation ' of relevant preview content illustrated in fig. 15.

With reference to Figure 16, at preview content is in the situation of image, and whether the indication preview content is formatd with GIG (GIF(Graphic Interchange format)) (Graphics interchange Format), JPEG (associating picture experts group), TIFF (tagged image file format), XBM (X bitmap) etc.

If preview content is a text, whether be pure ASCII (ASCII) text or utilize HTML (HTML) or the formative text of XML (extend markup language) if then indicating preview content.

If preview content is an audio frequency, whether be elementary audio (basicaudio) or utilize MPEG (Motion Picture Experts Group) or the formative audio frequency of windows wave file (WAV) if then indicating preview content.

If preview content is a video, indicate then whether preview content is to utilize Quicktime or the formative video of AVI (Audio Video Interleaved) ((audio video interleaving)).

If receiving equipment 1360 is activated, then application/UI manager 806 visits SD﹠amp via service control manager 816, IP manager 804 and network interface unit 802; S server 1320, and ask link information then.In response to described link information request, SD﹠amp; S server 1320 provides BCG to find the form of record to receiving equipment 1360, and described form is a link information.Find in the form of record at BCG, comprise be used to make receiving equipment 1360 can accessed content server 1300, the link information of preview content server 1310 and content guide server 1320.And, find in the form of record at BCG, described in explanation in front, comprise being used for notifying information whether preview content exist and the authentication information that is used to differentiate described preview content in the situation that has preview content.

Receive by SD﹠amp via network interface unit 802; The BCG that S server 1320 provides finds the form of record, and will comprise that then the BCG that is received finds that the grouping of the form of record is input to IP manager 804.

IP manager 804 checks whether from the destination of the grouping of network interface unit 802 inputs be receiving equipment 1360.If described destination is a receiving equipment 1360, then IP manager 804 is transmitted corresponding grouping according to transmission/reception agreement to appropriate managerial device piece.

To SD﹠amp; S server 1320 sends form that BCG find record with link information that content server 1310 is provided etc.Therefore, IP manager 804 is transmitted to service discovery manager 814 and is comprised that BCG finds the grouping of the form of record.

The link information that service discovery manager 814 is managed about the server that various services are provided.Service discovery manager 814 finds that by resolving BCG the form of record obtains the link information of content guide server 1320, and transmits the link information of the content guide server 1320 that is obtained then to application/UI manager 806.

Application/UI manager 806 visits content guide server 1320 via service discovery manager 814, IP manager 804 and network interface unit 802 along the link information of content guide server, and the information of request content guide service then.

If receive request to the information of content guide service from receiving equipment, then content guide server 1310 sends the information of content guides service.In the situation of the request of optionally making the information that content guide is served according to query scheme, the information of the content guide service of optionally being asked is sent to receiving equipment.In this case, for the content that has its preview content in the information of content guide service, content guide service 1310 is read described content from preview content server 1310 in advance, and stores the preview content of being read then.Information in the content guide service will be provided in the situation of receiving equipment, and it can be provided for receiving equipment with the preview content of being read.

The information of the content guide service that provides by content guide server 1310 is provided via network interface unit 802.The information of the content guide service that is received is forwarded to application/UI manager 806 via IP manager 804.

Application/UI manager 806 is stored the information of the content guide service that is received in service information data library unit 812, and the information of the content guide service of administrative institute's storage then.If be used for the push button signalling of the display command of content guide, then use the information with preview content displaying contents guide service on display unit 926 such as OSD by user input.

If content guide server 1310 does not provide preview content by the information that the content guide service is provided, then application/UI manager 806 uses by SD﹠amp; The form of the BCG discovery record that S server 1320 provides is checked the content that its preview content exists.If having the content of preview content is found, then application/UI manager 806 visits preview content server 1320 via service discovery manager 814, IP manager 804 and network interface unit 802 according to the link information of preview content server 1310, and asks described preview content then.

In response to described preview content request, preview content server 1310 provides corresponding preview content.Receive the preview content that provides by preview content server 1310 via network interface unit 802.The preview content that is received is forwarded to application/UI manager 806 via IP manager 804.

Application/UI manager 806 is stored described preview content in service information data storehouse 812, and the preview content of administrative institute storage then.If user input is used for the push button signalling of the display command of content guide, then use information on display unit 826 such as OSD with described preview content displaying contents guide.

Information with the displaying contents guide information is example, shown in Fig. 17, at bottom of screen displaying contents guide.If the preview content of the content that cursor is indicated exists, then on the viewing area 1700 at the right top of screen, show described preview content.Therefore, the user can check described preview content.

In this case, shown preview content can comprise live image and still image.If described preview content is a voice data, then it does not show on viewing area 1700, but can export described audio frequency via loud speaker.

Information with the displaying contents guide information is example, as shown in figure 18, sets each viewing area 1800 below shown each content on screen.And, can on each viewing area 1800, show corresponding preview content.

In this case, preferably inform that in the mode that on the viewing area 1800 of the content that does not have preview content, shows " preview is not found " (' Preview not found ') user's preview content does not exist.

If outputed to loud speaker fully if comprise audio signal and described audio signal in preview content, then the user can not correctly hear audio signal.Therefore, in the situation of the information of attempting displaying contents guide service, applications/UI manager 806 determines the content at places that cursor is located, and the audio signal corresponding to the preview content of decision content can be output via loud speaker.

Figure 19 is the flow chart of the signal processing method of another preferred embodiment according to the present invention.

With reference to Figure 19, content server 1300 provides the information [S1900] of content guide service to content guide server 1320.

Content guide server 1320 is to SD﹠amp; S server 1330 provides link information [S1902].In this case, described link information comprise make receiving equipment 1360 can accessed content server 1300, the link information of preview content server 1310 and content guide server 1320.And described link information contains and is useful on the notice information that whether exists of preview content and the authentication information that is used to differentiate described preview content in having the situation of described preview content.

In this case, sequentially represent above step S1900 and S1902 for simplicity.Alternatively, at content guide server 1320 to SD﹠amp; S server 1330 provides after the link information, and content server 1300 can provide the information of content guide service to content guide server 1320.The information of described link information and content guide service can side by side be provided alternatively.

1320 decisions of content guide server have the content of the preview content in the information of the content guide service that content server 1300 is provided.As determination result, have the content of described preview content if exist, then content guide server 1320 is to preview content server 1310 request corresponding preview contents [S1904].In response to described request, preview content server 1310 provides corresponding preview content [S1906] to content guide server 1320.

After receiving equipment 1360 has been activated [S1908], finish if start, then it visits SD﹠amp; S server 1330, and ask link information [S1910] then.If SD﹠amp like this, then; The form that S server 1330 provides BCG to find record for receiving equipment 1360, described form are to contain the link information [1912] that is useful on the information whether the notice preview content exist and is used to differentiate the authentication information of described preview content in having the situation of preview content.

Receiving equipment 1360 receives by SD﹠amp; The link information that S server 1330 provides.Receiving equipment 1360 visits content guide server 1320 according to the link information that is received, and the information [S1914] of request content guide service then.If like this, then content guide server 1320 provides the information of content guide service to receiving equipment 1360 in response to described request.In this case, content guide server 120 provides preview content [S1916] with the information of content guide service.

Subsequently, whether receiving equipment 1360 decision users import the push button signalling [S1918] that is used for the content guide display command.As the result of described decision, if imported the display command that is used for content guide, the information of receiving equipment 1360 displaying contents guide service on display unit 826 then.Especially, receiving equipment 1360 for example shows the information [S1920] that comprises as the content guide service of Figure 17 or preview content shown in Figure 180 on screen.

Figure 20 is the flow chart according to the signal processing method of another preferred embodiment of the present invention.

With reference to Figure 20, content server 1300 provides the information [S2000] of content guide service to content guide server 1320.Content guide server 1320 is to SD﹠amp; S server 1330 provides link information [S2002].In this case, as to described in the above stated specification of last embodiment, described link information comprise make receiving equipment 1360 can accessed content server 1300, the link information of preview content server 1310 and content guide server 1320.And described link information contains and is useful on the notice information that whether exists of preview content and the authentication information that is used to differentiate described preview content in having the situation of described preview content.

After receiving equipment 1360 has been activated [S2004], if finish startup, then to SD﹠amp; S server 1330 request link informations [S2006].If SD﹠amp like this, then; S server 1330 is found record for information and the BCG that receiving equipment 1360 is provided for notifying preview content whether to exist, and described BCG finds that record is the link information [S2008] that contains the information of relevant preview content.

If SD﹠amp; S server 1330 provides link information, and then receiving equipment 1360 receives described link information.Receiving equipment 1360 visits content guide server 1320 according to the link information that is received, and the information [S2010] of request content guide service then.If like this, then content guide server 1320 provides the information [S2012] of content guide service to receiving equipment 1360 in response to described request.

Receiving equipment 1360 uses by SD﹠amp; The link information decision that S server 1330 provides has the content of preview content.If described content has preview content, then receiving equipment 1360 is visited preview content servers 1310, and asks described preview content [S2014] then.If like this, then preview content server 1310 provides corresponding preview content [S2016] in response to described request to receiving equipment 1360.

Subsequently, whether receiving equipment 1360 decision users import the push button signalling [S2018] that is used for the content guide display command.As the result of described decision, if imported the display command that is used for described content guide, the information of receiving equipment 1360 displaying contents guide service on display unit 826 then.Especially, receiving equipment 1360 for example shows the information [S2020] that comprises as the content guide service of Figure 17 or preview content shown in Figure 180 on screen.

In this case, receiving equipment 1360 is visited preview content server 1310 in advance and is asked described preview content then.After receiving equipment 1360 provides preview content corresponding to described request,, then for example on screen, show the information of the content guide service that comprises described preview content if imported the display command that is used for content guide.

Alternatively, when enforcement was of the present invention, preview content server 1310 did not provide preview content to receiving equipment 1360 in advance.If imported the display command that is used for content guide, then receiving equipment 1360 is visited preview content servers 1310, and asks described preview content then.In response to described request, provide described preview content to receiving equipment 1360.The information that can on screen, show the content guide service that comprises described preview content then.

Correspondingly, can use Internet Protocol to apply the present invention to the IPTV system.And the present invention can be applied in the system that needs independent request system in the channel switching or switching delay is arranged when channel switches.

To those skilled in the art, various modifications and change be can make in the present invention clearly and spirit of the present invention or scope do not deviated from.Therefore, this invention is intended to contain modification of the present invention and change, as long as described modification and change belong to the scope of the claims and the equivalent form of value thereof.

Claims

1. method that sends broadcast data may further comprise the steps:

Transmission comprises that the service provider of relevant service provider's information finds information;

Transmission comprises the service discovery information about the information of the service that offers the service provider; And

Send the stream that is used for described service to the receiver that is connected.

2. according to the process of claim 1 wherein, in described stream forwarding step, send the stream that is used to show the stream of the service of asking channel and is used for the service of at least one buffering setting contents of channel.

3. according to the method for claim 2, wherein, described buffering setting contents of channel comprises at least one channel of selecting from following group, described group comprises the adjacent channel that shows the request channel, before watched channel, user's special use to watch reserved channel and user's preference channel.

4. according to the process of claim 1 wherein, described information about service comprises the information of the preview service of relevant main service and main service, and wherein in described stream forwarding step, transmission is used for the stream that preview is served.

5. according to the method for claim 4, wherein, described service discovery information comprises the information of relevant at least one preview service.

6. according to the method for claim 4, wherein, described preview information on services comprises at least one information of selecting from following group, described group comprises DVB three metamessages, preview service access address information, preview service maximal rate information, preview service audio attribute information and the preview services video attribute information that indicates whether to exist the information that the preview service is provided, preferred preview information on services, preview service.

7. according to the process of claim 1 wherein, in described stream forwarding step, be sent in the stream by content being divided into a part shown in the service that at least one or a plurality of part provide and the stream of at least one buffering setting section.

8. method that receives broadcast data may further comprise the steps:

Reception comprises the service discovery information grouping of the information of relevant service, and is extracted in the information that comprises in the described grouping;

The information that storage is extracted from described grouping, and use institute's canned data to carry out channel map; And

Use described channel map to receive the stream that is used for described service.

9. method according to Claim 8, wherein, in described stream receiving step,

Receive and show the stream of the service that is used for the demonstration request channel on the screen, and buffering is used for the stream of the service of at least one buffering setting contents of channel.

10. according to the method for claim 9, wherein, described buffering setting contents of channel comprises at least one that select from following group, described group comprises the adjacent channel that shows the request channel, before watched channel, user's special use to watch reserved channel and user's preference channel.

11. method according to Claim 8, wherein, in described stream receiving step,

On screen, receive and be presented at by being divided into the stream of the current display part in the content service that at least one or a plurality of part provide, and receive and cushion the stream of at least one buffering setting section.

12. method according to Claim 8, wherein, described information about service comprises the information of the preview service of relevant main service and main service, and wherein in described stream receiving step, reception is used for the stream that described preview is served.

13., further be included in the step that shows the preview service that is received on the screen according to the method for claim 12.

14. the method according to claim 13 further may further comprise the steps:

Receive the main service of the shown preview service that whether will watch.

15., further be included in channel shows the preview service that is received between transfer period step according to the method for claim 12.

16. according to the method for claim 12, the step of the preview service that further comprises buffering and received.

17. method according to claim 15, wherein said preview information on services comprises at least one that select from following group, described group of DVB three metamessages, preview service access address information, preview service maximal rate information, preview service audio attribute information and preview services video attribute information that comprises the information that indicates whether to occur providing the preview service, preferred preview information on services, preview service.

18. according to the method for claim 12, wherein said service discovery information grouping comprises the information of relevant at least one preview service.

19. according to the method for claim 12, wherein said stream comprises at least one preview service.

20. a broadcasting receiver comprises:

The service discovery manager is used to receive the service discovery information grouping of the information that comprises relevant service, and is extracted in the information that comprises in the described grouping;

The service information data library unit is used to store the information of extracting from described grouping;

Domain channel manager is used to use institute's canned data to carry out channel map, and manages described channel map; And

Application/UI manager is used to use described channel map to receive the stream that is used for described service.

21. broadcasting receiver according to claim 20, described application/UI manager receives the stream that is used to show the service of asking channel, on screen, show described stream, receive the stream of the service that is used at least one buffering setting contents of channel, and control the described stream that will be cushioned.

22. according to the broadcasting receiver of claim 20, further comprise memory cell, be used to receive and store the stream of the service that is used for described buffering setting contents of channel.

23. broadcasting receiver according to claim 20, wherein said application/UI manager receives the stream of at least one buffering setting section of the content service that is divided at least one part, show described stream, receive the stream of at least one buffering setting section, and control the described stream that will be cushioned.

24. according to the broadcasting receiver of claim 20, wherein

Described information about service comprises the information about the preview service of the information of main service and relevant main service,

Described application/UI manager use channel map control be used for the preview service with received stream.

25. according to the broadcasting receiver of claim 24, the preview service that is received that wherein said application/control of UI manager will show on screen.

26. according to the broadcasting receiver of claim 24, wherein said application/UI manager shows the preview service that is received at channel on screen between transfer period.

27. according to the broadcasting receiver of claim 24, wherein said application/UI manager shows the preview service of selected channel in advance on screen, and whether control watching the main service of selecteed selected channel occur.