Apparatus and method for transmitting or receiving broadcast signal (as amended)
Disclosed is a method for transmitting a broadcast signal. A method for transmitting a broadcast signal according to an embodiment of the present invention comprises the steps of: delivery layer processing broadcasting service data and signaling information for the broadcasting service data; UDP/IP encapsulating the broadcasting service data and signaling information for the broadcasting service data; and physical layer processing the broadcasting service data and signaling information for the broadcasting service data.
1. A method for transmitting a broadcast signal, the method comprising:
generating service layer signaling (SLS) information for broadcast service data of a broadcast service, wherein the SLS information provides information for discover and acquisition of the broadcast service and content component of the broadcast service, and the SLS information processed by a delivery protocol, the delivery protocol being Real-Time Object Delivery over Unidirectional Transport (ROUTE) protocol or MPEG Media Transport Protocol (MMT) protocol;
generating low level signaling (LLS) information, the LLS information including table ID information identifying a type of signaling information included in the LLS information; and
transmitting the broadcast signal including the broadcast service data, the SLS information and the LLS information,
wherein the type of the signaling information includes service list table (SLT) information including information used for discovering the SLS information and building a basic service list, and
wherein the SLT information includes SLS protocol information indicating a type of the delivery protocol of the SLS information as the ROUTE protocol or the MMT protocol and uniform resource locator (URL) information comprising a base URL used for obtaining the SLS information for the broadcast service via a broadband other than the delivery protocol,
wherein the base URL is used to make an hypertext transfer protocol (HTTP) request for requesting a specific SLS signaling information to a signaling server, and
wherein a response message for the HTTP request from the signaling server includes a metadata envelope including the specific SLS information, and the metadata envelop further includes next URL information comprising a URL for obtaining next scheduled update for the specific SLS information.
2. The method of claim 1 , wherein
when the delivery protocol is the ROUTE protocol, the SLS information includes a media presentation description (MPD) fragment providing a description regarding a media presentation regarding the broadcast service, and the MPD fragment includes an asset ID information for associating content IDs providing identification information of linear content and identification information of supplementary content of the broadcast service.
3. The method of claim 2 , wherein
the content ID includes a first content ID providing identification information of entertainment-related supplementary content and a second content ID providing identification information of advertisement-related supplementary content.
4. The method of claim 1 , wherein the SLT information includes service category information, and a service category includes at least one of a linear audio/video service, a service of only linear audio, an app-based service, an electronic service guide (ESG) service, or an emergency alert system (EAS) service.
5. The method of claim 4 , wherein
when the service category is the ESG service, service data regarding the ESG service includes service guide information for announcing information regarding the broadcast service, and the service guide information includes a service fragment having information regarding the broadcast service and a content fragment having content information regarding the broadcast service.
6. The method of claim 5 , wherein
the content fragment includes a preview icon element providing a URL pointing to an icon used to represent the broadcast service in the service guide.
7. A broadcast signal transmitter, comprising:
a processor configure to generate and transmit a broadcast signal,
wherein the processor is further configured to:
generate service layer signaling (SLS) information for broadcast service data of a broadcast service, wherein the SLS information provides information for discover and acquisition of the broadcast service and content component of the broadcast service, and the SLS information is processed by a delivery protocol, the delivery protocol being Real-Time Object Delivery over Unidirectional Transport (ROUTE) protocol or MPEG Media Transport Protocol (MMT) protocol;
generate low level signaling (LLS) information, the LLS information including table ID information identifying a type of signaling information included in the LLS information; and
transmit the broadcast signal including the broadcast service data, the SLS information and the LLS information via the communication unit,
wherein the type of the signaling information includes service list table (SLT) information including information used for discovering the SLS information and building a basic service list, and
wherein the SLT information includes SLS protocol information indicating a type of the delivery protocol of the SLS information as the ROUTE protocol or the MMT protocol and uniform resource locator (URL) information comprising a base URL used for obtaining the SLS information for the broadcast service via a broadband other than the delivery protocol
wherein the base URL is used to make an hypertext transfer protocol (HTTP) request for requesting a specific SLS signaling information to a signaling server, and
a response message for the HTTP request from the signaling server includes a metadata envelope including the specific SLS information, and the metadata envelop further includes next URL information comprising a URL for obtaining next scheduled update for the specific SLS information.
8. The broadcast signal transmitter of claim 7 , wherein
when the delivery protocol is the ROUTE protocol, the SLS information includes a media presentation description (MPD) fragment providing a description regarding a media presentation regarding the broadcast service, and the MPD fragment includes an asset ID information for associating content IDs providing identification information of linear content and identification information of supplementary content of the broadcast service.
9. The broadcast signal transmitter of claim 8 , wherein
the content ID includes a first content ID providing identification information of entertainment-related supplementary content and a second content ID providing identification information of advertisement-related supplementary content.
10. The broadcast signal transmitter of claim 7 , wherein
the SLT information includes service category information, and a service category
includes at least one of a linear audio/video service, a service of only linear audio, an app-based service, an electronic service guide (ESG) service, or an emergency alert system (EAS) service.
11. The broadcast signal transmitter of claim 10 , wherein
when the service category is the ESG service, service data regarding the ESG service includes service guide information for announcing information regarding the broadcast service, and the service guide information includes a service fragment having information regarding the broadcast service and a content fragment having content information regarding the broadcast service.
12. The broadcast signal transmitter of claim 11 , wherein
the content fragment includes a preview icon element providing a URL pointing to an icon used to represent the broadcast service in the service guide.