KR20180083629A - Signaling method for emergency alert via broadcast network in both transmitting and receiving side and apparatus thereof - Google Patents

Abstract

According to the present invention, proposed is a signaling method of an emergency alert through a broadcast network. A method for transmitting a broadcast signal of the signaling method of the present invention, comprises the steps of: generating service data for broadcast services; generating a service list table; performing the processing with IP packets; performing the processing with link layer packets; performing the processing with PLPs; performing the processing with a signal frame; and/or performing a transmission. In addition, the signaling method of the present invention proposes a method for efficiently performing signaling for an emergency alert in an emergency.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signaling method of an emergency alert through a broadcasting network on a transmission / reception side and a broadcasting signal transmitting / receiving device for emergency alert signaling,

The present invention relates to a broadcast signal transmitting apparatus, a broadcast signal receiving apparatus, and a broadcast signal transmitting / receiving method. The present invention also relates to a method and apparatus for providing signaling for an emergency through a broadcast network.

Hybrid broadcasting service is a form of broadcasting service that is likely to be utilized in future broadcasting services. Hybrid broadcasting service provides broadcasting service by interworking terrestrial broadcasting and internet network (broadband). The hybrid broadcast service can provide A / V (Audio / Video) media data of a broadcast service through a terrestrial broadcast network and provide additional data for a broadcast service through the Internet network. According to an embodiment, additional data may be transmitted through a broadcasting network, or all and / or a part of A / V media data may be provided through an Internet network. Such a hybrid broadcasting service can provide various broadcast contents to the user.

The present invention proposes a method for transmitting data in real time in a hybrid broadcasting environment. According to an embodiment this may be done via transmission of an IP-based file.

Also, the present invention proposes a method for efficiently performing signaling for an emergency situation in a hybrid broadcasting environment. The system according to the existing method provides an alarm for the emergency situation in terms of use and purpose. The present invention extends the signaling for an alert in an emergency situation so that the corresponding information can be efficiently transmitted through various transmission methods. Accordingly, the present invention can solve the limitations and problems of the conventional system.

In accordance with the purpose of the present invention, as embodied and broadly described herein, the present invention proposes a scheme and apparatus for efficiently providing signaling for a broadcast service and an emergency situation in a hybrid broadcast environment.

According to another aspect of the present invention, there is provided a method of signaling an emergency alert through a broadcast network, the method comprising: generating service data for broadcast services; Generating a service list table indicating a transmission session to which service signaling information for the broadcast services is transmitted; Processing the service data and the service table into Internet Protocol (IP) packets delivered over transport sessions, wherein the IP packets comprising the service list are delivered over a dedicated transport session having a specific IP address; Processing the IP packets and link layer signaling information into link layer packets, wherein the link layer signaling information comprises information indicative of a relationship between the transport sessions and data PLPs (Physical Layer Pipes); Processing the link layer packets with the data PLPs, wherein information shared between the data PLPs is processed with a base PLP; Processing the data PLPs and the base PLP into a signal frame, wherein the signal frame further comprises a shared signaling channel; And transmitting the signal frame through a broadcasting network; Wherein the signal frame includes the AEAT in different areas of the signal frame according to priority information of an alert message of an Advanced Emergency Alert Table (AEAT), the alert message of the AEAT includes information on an emergency situation And the like.

Advantageously, if the priority information indicates that the emergency situation has a highest level of priority, the signaling method comprises: inserting the AEAT into the shared signaling channel; And a signaling method of an emergency alert signal through a broadcasting network.

Advantageously, if the priority information indicates that the emergency has a highest level of priority, the signaling method comprises: separating the AEAT into a first sub AEAT and a second sub AEAT; Inserting the first sub AEAT into the shared signaling channel or the base PLP; Processing the second sub AEAT into IP packets; And forwarding IP packets including the second sub AEAT through the dedicated transport session with the specific IP address; And a signaling method of an emergency alert signal through a broadcasting network.

Preferably, the first sub AEAT includes the first identifier information and the priority information, alert issuer information, valid time information, and expiration time information in the alert message, and the alert issuer information indicates the alert message Wherein the validation time information indicates a valid time of the alert message, the expiration time information indicates an expiration time of the alert message, the second sub AEAT indicates second identifier information, and an alert description in the alert message And the alert description information provides text data describing the emergency situation. The method of signaling an emergency alert through a broadcasting network may be proposed.

Preferably, the first identifier information of the first sub AEAT is matched with the second identifier information of the second sub AEAT. A signaling method of an emergency alert through a broadcasting network may be proposed.

Preferably, the second sub AEAT further comprises live media information identifying an emergency situation related service providing A / V (Audio / Video) media data for the emergency situation, The transmission session to which the service signaling information is transmitted is indicated by the service list table, the live media information is used to identify the emergency service in the service list table, and the service signaling information for the emergency service And provides session description information describing transmission sessions for delivering the A / V media data to the alert message. The method of signaling an emergency alert signal through a broadcast network may be proposed.

Advantageously, said signal frame further comprises L1 signaling information for signaling said service data in said data PLPs, said L1 signaling information including whether said AEAT or said first sub AEAT is included in said shared signaling channel And a flag signal for indicating an emergency alert signal through the broadcasting network.

Preferably, when the priority information indicates that the emergency situation has an intermediate level priority, the signaling method includes: processing the link layer signaling information by including the AEAT in the link layer packets ; And a signaling method of an emergency alert signal through a broadcasting network.

Advantageously, if the priority information indicates that the emergency situation has a lower level of priority, the signaling method comprises: processing the AEAT as IP packets; And forwarding IP packets including the AEAT over the dedicated transport session having the specific IP address; And a signaling method of an emergency alert signal through a broadcasting network.

A broadcast signal transmission apparatus for emergency alert signaling according to an exemplary embodiment of the present invention includes a service data generation unit for generating service data for broadcast services; A lower level signaling generation unit for generating a service list table indicating a transmission session through which service signaling information for the broadcast services is transmitted; An IP layer processing unit for processing the service data and the service table into IP (Internet Protocol) packets transmitted through transmission sessions, wherein the IP packets including the service list table are transmitted through a dedicated transmission session having a specific IP address Being; A link layer processing unit for processing the IP packets and link layer signaling information into link layer packets, wherein the link layer signaling information includes information indicating a relationship between the transport sessions and data PLPs (Physical Layer Pipes); A physical layer processing unit for processing the link layer packets into the data PLPs, wherein information shared between the data PLPs is processed by a base PLP, and the physical layer processing unit processes the data PLPs and the base PLP into a signal frame Wherein the signal frame further comprises a shared signaling channel; And a transmitter for transmitting the signal frame through a broadcasting network. Wherein the signal frame includes the AEAT in different areas of the signal frame according to priority information of an alert message of an Advanced Emergency Alert Table (AEAT), the alert message of the AEAT includes information on an emergency situation And the like.

Preferably, when the priority information indicates that the emergency situation has a highest level of priority, the physical layer processor inserts the AEAT into the shared signaling channel. A broadcast signal transmission apparatus may be proposed.

Preferably, when the priority information indicates that the emergency situation has a highest level of priority, the broadcast signal transmission apparatus separates the AEAT into a first sub AEAT and a second sub AEAT, Lt; / RTI > The physical layer processing unit inserts the first sub AEAT into the shared signaling channel or the base PLP, and the IP layer processing unit processes the second sub AEAT into IP packets, wherein the second sub AEAT includes the second sub AEAT IP packets are transmitted through the dedicated transmission session having the specific IP address. A broadcast signal transmission apparatus for emergency alert signaling may be proposed.

Preferably, the first sub AEAT includes the first identifier information and the priority information, alert issuer information, valid time information, and expiration time information in the alert message, and the alert issuer information indicates the alert message Wherein the validation time information indicates a valid time of the alert message, the expiration time information indicates an expiration time of the alert message, the second sub AEAT indicates second identifier information, and an alert description in the alert message And the alert description information provides the text data describing the emergency situation. The apparatus for transmitting a broadcast signal for emergency alert signaling may be proposed.

Advantageously, the first identifier information of the first sub AEAT is matched with the second identifier information of the second sub AEAT. A broadcast signal transmission apparatus for emergency alert signaling may be proposed.

Preferably, the second sub AEAT further comprises live media information identifying an emergency situation related service providing A / V (Audio / Video) media data for the emergency situation, The transmission session to which the service signaling information is transmitted is indicated by the service list table, the live media information is used to identify the emergency service in the service list table, and the service signaling information for the emergency service And provides session description information describing transmission sessions for delivering the A / V media data to the alert message. The apparatus for transmitting a broadcast signal for emergency alert signaling may be proposed.

Advantageously, said signal frame further comprises L1 signaling information for signaling said service data in said data PLPs, said L1 signaling information including whether said AEAT or said first sub AEAT is included in said shared signaling channel And the flag information indicating the emergency alert signaling is further included in the flag signal.

Preferably, when the priority information indicates that the emergency situation has an intermediate level priority, the link layer processing unit may include the AEAT in the link layer signaling information to process the link layer packets A broadcast signal transmission apparatus for emergency alert signaling can be proposed.

Preferably, when the priority information indicates that the emergency situation has a lower level priority, the IP layer processing unit processes the AEAT into IP packets, wherein the IP packets including the AEAT are And is transmitted through the dedicated transmission session having the specific IP address. The apparatus for transmitting a broadcasting signal for emergency alert signaling may be proposed.

INDUSTRIAL APPLICABILITY The present invention can effectively support a next generation broadcast service in an environment supporting a hybrid broadcast using a terrestrial broadcast network and an internet network.

The present invention can provide an efficient emergency alert according to a situation in an environment supporting hybrid broadcasting.

The present invention can provide an efficient signaling scheme in providing an emergency alert in a hybrid broadcasting environment according to circumstances.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram illustrating a broadcast signal transmission apparatus for emergency alert signaling according to an aspect of the present invention. FIG.
Figure 2 illustrates one embodiment of a protocol stack on which the present invention is based.
3 is a diagram illustrating a broadcast signal receiving apparatus for emergency alert signaling according to another aspect of the present invention.
4 is a diagram illustrating a structure of a signal frame according to an embodiment of the present invention.
5 is a diagram illustrating an operation of the emergency alert signaling processor according to an embodiment of the present invention.
6 is a diagram illustrating an operation of the emergency alert signaling processor according to another embodiment of the present invention.
7 is a diagram illustrating an alarm message according to another embodiment of the present invention.
8 is a diagram illustrating an application layer transmission packet according to an embodiment of the present invention.
9 is a diagram illustrating an effect of an application layer transmission packet according to an embodiment of the present invention.
10 is a diagram illustrating an application layer transmission packet according to another embodiment of the present invention.
11 is a diagram illustrating an effect of an application layer transmission packet according to another embodiment of the present invention.
12 is a diagram illustrating a signaling method of an emergency alert through a broadcasting network according to another aspect of the present invention.

The present invention will be described in detail with reference to the drawings attached to an apparatus, a method and preferred embodiments thereof according to the present invention. The following detailed description describes preferred embodiments in accordance with the present invention, as well as embodiments that may be implemented in accordance with the present invention. The following detailed description includes details in order to provide a thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced without these details.

Most of the terms used in the present invention are selected from common ones widely used in the field, but some terms are arbitrarily selected by the applicant and the meaning will be described in detail in the following description as necessary. Accordingly, the invention should be understood based on the intended meaning of the term rather than the mere name or meaning of the term.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram illustrating a broadcast signal transmission apparatus for emergency alert signaling according to an aspect of the present invention. FIG.

According to an embodiment of the present invention, a broadcast signal transmission apparatus includes a service data generator, a low-level signaling generator, an IP layer processor, a link layer processor, a physical layer processor, a transmitter and / And a processing unit.

The service data generation unit may generate service data for broadcast services. The broadcasting service may include a terrestrial broadcasting service, a mobile broadcasting service, and / or a UHDTV broadcasting service. The broadcast service may be the above-described hybrid broadcast service. The service data of a broadcasting service includes not only audio / video (A / V) media data included in the corresponding broadcasting service, closed caption information, NRT (Non-Real Time) data related to the corresponding broadcasting service, Service level signaling (SLS) signaling the service.

The low level signaling generator may generate low level signaling information. The lower level signaling information may be communicated over a dedicated transport session having a specific IP address. Where a particular IP address may refer to a predefined well known IP address and port number. A dedicated transport session may also refer to a particular IP stream defined by that particular IP address. The lower level signaling information may include a service list table (SLT). The service list table may indicate a transmission session in which each service signaling information for each broadcast service is transmitted. The service list table can indicate the corresponding transmission session by including the IP address and the port number of the corresponding transmission session.

An IP (Internet Protocol) layer processing unit may process the generated service data and / or lower level signaling information into IP packets. The processing here may mean encapsulating the data into IP packets. These IP packets may be forwarded through the transmission sessions. IP packets containing lower level signaling information may be transmitted through the dedicated transmission session described above.

The link layer processing unit may process the generated IP packets and / or link layer signaling information as link layer packets. The processing here may mean encapsulating the data into link layer packets. The link layer signaling information is signaling information generated at the link layer or inserted at the link layer, and can operate at a lower level than signaling information at the IP level transmitted through the IP packet. The receiving side can acquire the link layer signaling information faster than the IP level signaling information of the lower level signaling information, the SLT, the SLS, and the like. Thus, the link layer signaling information can be obtained prior to session establishment. For example, the link layer signaling information may include LMT (Link Map Table) information indicating a relationship between the above-described transmission sessions and data PLPs (Physical Layer Pipes) to be described later.

The physical layer processing unit can process the data according to the physical layer protocol to generate a signal frame and generate it as a broadcast signal. The physical layer processing section may process the link layer packets into a data PLP. These data PLPs may be mapped to signal frames through LDPC encoding, bit interleaving, constellation mapping, time interleaving, and the like. Such a series of operations can be performed by the physical layer processing unit. Here, information shared between data PLPs may be processed and transmitted in a specific PLP called a base PLP. The physical layer processing unit may map the data PLPs and the base PLP to the signal frame. The physical layer processing unit may further insert L1 signaling information into the signal frame. The L1 signaling information may provide signaling information on the data of the PLPs. The physical layer processing unit may further insert the shared signaling channel and / or the P1 signaling information into the signal frame. A shared signaling channel will be described later. The P1 signaling information may provide transmission parameters for the signal frame. The physical layer processing unit may eventually process the data to generate a signal frame and generate a broadcast signal.

The transmitting unit can transmit the generated broadcasting signal through the broadcasting network. That is, the transmitting unit can transmit the generated signal frame through the broadcasting network. This transmission unit may be a kind of antenna.

The emergency alert signaling processing unit can generate an AEAT (Advanced Emergency Alert Table) and perform processing on the AEAT. The AEAT may be a signaling table including at least one Alert Message. Each alert message may include information for an alert when an emergency occurs. Through the transmission of alarm messages, viewers can receive and respond to emergencies.

The emergency alert signaling processing unit can transmit the AEAT to each processing unit for data transmission. Each processing unit for data transmission may mean an IP layer processing unit, a link layer processing unit, and / or a physical layer processing unit.

The emergency alert signaling processing unit may transmit the AEAT to each processing unit for data transmission according to the priority information (priority) of the alarm message of the AEAT. The AEAT can be included in different areas of the corresponding signal frame according to the priority information of the alert message. To this end, the emergency alert signaling processing unit may be configured to transmit the AEAT to the AEAT so that the AEAT can be processed at different stages of the transmission process. To the processing units.

When receiving a broadcast signal, the broadcast receiving apparatus sequentially processes the broadcast signal. The broadcast receiving apparatus may first access the P1 signaling information to identify the corresponding signal frame, and then access the L1 signaling information and / or the data of the shared signaling channel. The broadcast receiving apparatus can access the base PLP information to acquire the corresponding data, and can access the link layer signaling information by parsing the data PLP. After that, the broadcast receiving apparatus accesses the IP stream of each transmission session, obtains low-level signaling information, and obtains each service data corresponding thereto.

In the broadcast system according to the present invention, the receiver of the broadcast can acquire data in the signal frame in such a stepwise manner. Therefore, as described above, the scheme that differentiates the data of the AEAT according to the priority information and processes it in each step of the transmission process is a scheme in which the broadcasting receiver receives the high-priority alarm message as soon as possible, Messages can be properly accessed from lines that do not place excessive stress on the system.

According to an embodiment of the present invention, when the emergency situation indicated by the alarm message of the AEAT has the highest priority, the emergency alert signaling processing unit may transmit the AEAT to the physical layer processing unit. The physical layer processing unit may insert the corresponding AEAT into the shared signaling channel described above.

According to another embodiment of the present invention, when the emergency situation indicated by the alarm message of the AEAT has an intermediate level priority, the emergency alert signaling processing unit may transmit the corresponding AEAT to the link layer processing unit. The link layer processing section can process the corresponding AEAT as the link layer signaling information described above. That is, the link layer processing unit can process the corresponding AEAT as a link layer packet that conveys link layer signaling information.

According to another embodiment of the present invention, when the emergency situation indicated by the alert message of the AEAT has a low-level priority, the emergency alert signaling processing unit may transmit the corresponding AEAT to the IP layer processing unit. The IP layer processing unit may process the corresponding AEAT into IP packets to be delivered at the IP level. Where these IP packets can be delivered over a dedicated transport session defined by the specific IP address described above.

According to another embodiment of the present invention, when the emergency situation indicated by the alarm message of the AEAT has the highest priority, the emergency alert signaling processing unit transmits the corresponding AEAT to the compact sub AEAT and the main (main) sub AEAT, and each of them can be transmitted to a processing unit of another layer (layer). The compact sub AEAT can include information for quickly grasping basic information, attributes, and the like for the alert message among the information in the alert message of the corresponding AEAT. The main sub AEAT may include information related to the emergency alert that the alarm message actually wants to be transmitted among the information in the alarm message of the corresponding AEAT. The compact sub AEAT and the main sub AEAT may be referred to as a first sub AEAT and a second sub AEAT, respectively.

According to another embodiment of the present invention, the emergency alert signaling processing unit may transmit the compact sub AEAT to the physical layer processing unit, and may be transmitted to the receiving side via the shared signaling channel or the base PLP. In addition, the emergency alert signaling processing unit may transmit the main sub AEAT to the IP layer processing unit and be delivered at the IP level through the dedicated transmission session described above.

According to another embodiment of the present invention, the alarm message of the AEAT may further include live media information. The live media information may include information about an emergency-related service. Live media information can also identify emergency services. Emergency-related services may be a part of a broadcast service that provides A / V media data related to an emergency that an AEAT alert message is intended to represent. Through the emergency service, viewers can receive specific information about the emergency situation and the alert in the form of A / V media.

The broadcast receiving apparatus can determine through which transmission session the SLS of the emergency situation related service is delivered through the information of the live media information and the service list table described above. At this time, the service identification information of the live media information can be used to identify the emergency service among the plurality of services described by the service list table. The broadcast receiving apparatus can acquire the information related to the transmission session in which the A / V component of the service is delivered and obtain the components using the obtained SLS of the emergency service. The SLS may provide transport session description information for a transport session in which components included in the related broadcast service are delivered. The broadcast receiving apparatus can additionally provide the A / V media for the emergency according to the obtained information.

According to another embodiment of the broadcast signal transmission apparatus according to the present invention, when the AEAT is separated, the live media information may be included in the main sub AEAT.

The details of each part (processing part, generating part, etc.) of the broadcast signal transmitting apparatus according to the present invention may be omitted or replaced with other parts, and other parts may be added according to the embodiment. Also, according to the embodiment, the respective parts may be integrated to perform the corresponding operation in one part.

Figure 2 illustrates one embodiment of a protocol stack on which the present invention is based.

As described above, the broadcast service can be delivered to the receiver through a plurality of layers (layers). In a broad sense, the broadcast signal transmission apparatus may generate service data of a broadcast service, and then perform processing for transmission to finally transmit data through a broadcast network (or broadband).

The service data may be generated in a format according to ISO base media file format (BMFF). ISO BMFF media files may be used for broadcast network / broadband delivery, media encapsulation and / or synchronization format. Here, the service data is all data related to the service, and may be a concept including service components constituting the linear service, signaling information on the linear service, Non Real Time (NRT) data, and other files.

There are two methods for broadcast service delivery through a broadcast network.

The first method is to process service data into MPU (Media Processing Units) based on MMT (MPEG Media Transport) and transmit it using MMTP (MMT protocol). In this case, the service data transmitted through the MMTP may include service components for the linear service and / or service signaling information therefor.

The second method may be to process the service data into DASH segments based on MPEG DASH and transmit it using ROUTE (Real time Object delivery over Unidirectional Transport). In this case, the service data transmitted through the ROUTE protocol may include service components for the linear service, service signaling information for the linear service, and / or NRT data. That is, non-timed data such as NRT data and files can be transmitted through ROUTE.

The data processed according to the MMTP or ROUTE protocol can be processed as application layer transmission packets such as MMTP packets and ROUTE packets, and then processed as IP packets through the UDP / IP layer. In service data delivery through a broadcasting network, SLT (Service List Table) can also be transmitted through a UDP / IP layer through a broadcasting network.

Each service component, e.g., an audio component or a video component, included in the broadcast service may be included in the transport sessions and delivered to the receiver. Here, the transmission sessions may mean a ROUTE session to an MMTP session.

IP packets can be processed as link layer packets at the link layer. The link layer can encapsulate data of various formats transmitted from the upper layer into a link layer packet, and then transmit the data to the physical layer.

In hybrid service delivery, one or more service elements may be delivered via a broadband path. In the case of hybrid service delivery, the data delivered to the broadband may include DASH format service components, service signaling information and / or NRT data thereto. These data can be processed via HTTP / TCP / IP, passed through the link layer for broadband transmission, and forwarded to the physical layer for broadband transmission.

The physical layer processes the data received from the link layer and transmits the data through a broadcasting network or broadband.

Each ROUTE session includes one or more LCT sessions that convey, in whole or in part, the content components that make up the service. In streaming service delivery, an LCT session may carry individual components of a user service, such as audio, video, or closed caption streams. Streaming media can be formatted as a DASH segment. For delivery of the NRT service or system metadata, the LCT session may deliver a file based content item. These content files may be composed of continuous (timed) or discrete (non-timed) media components of NRT services or metadata such as service signaling.

3 is a diagram illustrating a broadcast signal receiving apparatus for emergency alert signaling according to another aspect of the present invention.

According to an embodiment of the present invention, a broadcast signal receiving apparatus includes a tuner, a physical layer controller, a signal frame parser, a link layer packet processor, an IP / UDP filter, a signaling parser, a channel map DB, Layer client, a DTV control engine, a DASH client, an ISO BMFF parser, a media decoder, and / or an HTTP access client.

The tuner can receive a broadcast signal through a terrestrial broadcast channel. According to an embodiment, the tuner may perform some processing on the broadcast signal. In this case, the tuner can convert the broadcast signal into the form of a signal frame.

The physical layer controller can control the tuner and / or the signal frame parser. The physical layer controller can control the tuner using RF information of the broadcast channel to be received or control the operation of the signal frame parser using PLP-related parameters.

The signal frame parser may parse the received signal frame and perform the associated physical layer process. The signal frame parser can perform an inverse process of the operation performed by the physical layer of the transmitting side to obtain a link layer packet or the like.

The link layer packet processor can perform the process associated with the link layer. The link layer packet processor may obtain IP packets or link layer signaling information and the like from the link layer packets. The link layer packet processor can perform an inverse process of the operation performed by the link layer of the transmitting side.

The IP / UDP filter can filter a specific IP stream from IP packets (IP / UDP datagram). That is, IP packets corresponding to a specific transmission session can be filtered.

The signaling parser can obtain and process various types of signaling information. The signaling parser can obtain L1 signaling information, information of the shared signaling channel, information of the base PLP, link layer signaling information, low-level signaling information, etc. from the signal frame parser, the link layer packet processor, the IP / . The signaling parser can in particular acquire the information of the service list table and store it in the channel map DB. The signaling parser can be obtained by parsing the AEAT, the alert message, the compact sub AEAT and / or the main sub AEAT. The signaling parser may also obtain and obtain signaling information related to personalization of the broadcast service / content and / or user targeting. The signaling parser can pass the obtained signaling information to the DTV control engine.

The channel map DB (Data Base) may store channel map related information acquired from the signaling parser. Other acquired information can be stored in this DB. The information related to the channel map can be used for operations of the DTV control engine and the like.

The timing control receives and processes system time information from the system clock, thereby providing system time to the system. The timing control may provide timeline information for broadcast service processing. By the timing control, contents provided by streaming audio / video data, NRT data and the like can be synchronized.

The Application Layer Transport Client can process one or more ISO BMFF objects by processing data received from IP / UDP filters. Here, the received data may be an application layer transmission packet, and a transmission protocol packet supporting real-time object transmission. For example, the above-described ROUTE packet to MMTP packet may correspond to this. These packets may be contained in an IP packet, received, parsed by an IP / UDP filter, and delivered to an application layer client.

The DTV control engine is responsible for the interface between the modules, and can control them through parameter delivery. The DTV control engine can control the overall operation of the receiver to obtain data from the broadcast network / broadband channel. The DTV control engine includes an application processor (application signaling manager) for acquiring / managing application-related information related to a broadcast service and application control, a service signaling manager for acquiring and managing service signaling information, A service guide manager for managing a guide DB (not shown), an NRT file processor for acquiring and managing NRT data, and / or a targeting processor for acquiring / managing / calculating personalization related information, and the like.

The DASH client can perform processing on the DASH segment. The DASH client may perform operations relating to real-time streaming or adaptive streaming-related operations.

The ISO BMFF parser can extract audio / video data, related signaling information, and related parameters from an ISO BMFF object.

The media decoder can decode and render / present the acquired audio / video data.

An HTTP access client can request specific information from an HTTP server and receive and process responses to the request. The HTTP server can process requests received from HTTP clients and provide responses to them. At this time, the received information may be temporarily stored in the HTTP cache. In addition to the HTTP server, the broadcast signal receiving apparatus can acquire necessary information by communicating with external modules for providing broadcast services or contents such as a service / content server.

Although not shown in the drawing, the broadcast signal receiving apparatus according to the present invention may further include an emergency alert signaling processing unit. The emergency alert signaling processing section can control the processing of the signaling information related to the emergency alert, such as the AEAT, the alarm message, and the series of operations related thereto. The emergency alert signaling processing unit can perform an inverse process of the emergency alert signaling processing unit on the transmission side. The emergency alert signaling processor can match the compact sub AEAT and the main sub AEAT to obtain the information that the original AEAT wanted to provide. The emergency alert signaling processor may be located within the signaling parser or DTV control engine described above. Or the emergency alert signaling processing unit may be included in the broadcast signal receiving apparatus as a separate module.

According to another embodiment of the present invention, the broadcast signal receiving apparatus may further include additional modules participating in communication between the external apparatus and the broadcast signal receiving apparatus. These additional modules may include a device manager and / or a data sharing & communication module. The device manager can manage an external device by performing addition / deletion / update of an interlocking external device. The data sharing & communication module can perform data processing and operation control regarding data transmission / exchange between the broadcast receiving apparatus and the external apparatus. The data exchanged here may include signaling information and / or A / V data. Here, the external device is a companion device, which means a device for exchanging audio, video, and signaling information with a broadcast receiving device.

According to another embodiment of the broadcast signal receiving apparatus according to the present invention, the broadcast signal receiving apparatus may further include a redistribution module. The redistribution module may be a module that supports the acquisition of other service related information included in the broadcast signal through the broadband when the broadcast signal receiving apparatus receives the terrestrial broadcast signal through the set-top box, the cable, or the satellite.

4 is a diagram illustrating a structure of a signal frame according to an embodiment of the present invention.

The above-described signal frame may have various structures according to the embodiment. The signal frame may comprise P1 signaling information, L1 signaling information, a shared signaling channel, a base PLP, data PLPs and / or auxiliary data according to an embodiment. Each part of the signal frame may be omitted depending on the embodiment. For example, the illustrated signal frame (t4010) is a signal frame of the type in which the shared signaling channel is omitted. Here, the base PLP is denoted as a common PLP. Also, the illustrated signal frame (t4020) is a signal frame in which the base PLP is omitted. Here, the shared signaling channel is utilized for the purpose of FIC (Fast Information Channel). Depending on the embodiment, the signal frame may include both the shared signaling channel and the base PLP, or both.

The P1 signaling information may include information for detection of a transmitted signal. The P1 signaling information may also provide tuning information. The broadcast signal receiving apparatus can decode the next L1 signaling information part based on the parameter provided in P1. Accordingly, the broadcast receiving apparatus can acquire information on the configuration of the signal frame and the characteristics of the PLPs.

Data PLPs may carry service components such as audio, video, and general data. These data PLPs may be interleaved and transmitted to an "interleaved PLP region ".

The base PLP may include signaling information indicating to which data PLP the components constituting each service (channel) are transmitted. Depending on the embodiment, this signaling information may be carried in the L1 signaling information part. The base PLP can quickly and robustly transmit the signaling information for the broadcast service transmitted in the signal frame.

The shared signaling channel may contain information of the signal frame that the broadcast receiving apparatus should be able to acquire quickly. The shared signaling channel may be a separate channel within the signal frame. The shared signaling channel can be utilized as an FIC. The FIC may include information for a fast service scan and service acquisition for one or more broadcast services delivered by the corresponding signal frame. The FIC can perform a similar role to the SLT described above. Unlike the SLT, however, the FIC can be inserted directly into the signal frame as a shared signaling channel. According to an embodiment, the FIC may provide information about broadcast services generated by one or more broadcast stations. The broadcast signal receiving apparatus can quickly scan and acquire related broadcast services using the FIC.

5 is a diagram illustrating an operation of the emergency alert signaling processor according to an embodiment of the present invention.

First, the acquisition of service signaling information according to the present invention will be described.

The broadcast receiving apparatus can first obtain the P1 signaling information and identify the corresponding signal frame. The broadcast receiving apparatus can then obtain information on the PLPs used in one broadcast stream through the L1 signaling information.

The L1 signaling information may provide information about the data PLPs through PLP loops, respectively. Among the L1 signaling information, the PLP_Property field may indicate an attribute for each PLP. For example, if the PLP_Property field is 0x01, it indicates that the PLP is transmitted only the signaling information, when the signaling information is 0x02, the PLP is mixed with the signaling information and the service component information, and when the field is 0x03, only the service component information is transmitted. Other values of the PLP_Property field may be left for future use.

If the property of the PLP informed by the L1 signaling information is 0x01 or 0x02, it is known that the signaling information is received in the corresponding PLP. Here, this signaling information may be the above-mentioned low-level signaling information. The lower level signaling information may include a service list table. Through this process, the broadcast receiving apparatus can acquire the service list table.

The service list table can list broadcasting services delivered through the corresponding signal frames as described above. The service list table may indicate a transmission session in which each service signaling information (SLS) for each broadcast service is delivered. This indication information may be referred to as bootstrap information. The broadcast receiver can access the SLS using bootstrap information. Through the SLS, the broadcast receiving apparatus can acquire service components of the broadcast service. The SLS may provide transport session description information for a transport session in which components included in the related broadcast service are delivered.

In contrast to the foregoing, according to other embodiments of the present invention, the service list table may be communicated via a shared signaling channel, a base PLP or link layer signaling information.

Hereinafter, the emergency alert signaling using the AEAT according to the present invention will be described.

The emergency alert signaling processing unit of the broadcast signal transmission apparatus according to the present invention can manage the AEAT to be processed differently according to the priority information of the AEAT alert message as described above.

An OnScreen Message Notification Table (OSMNT) may be further utilized for signaling related to the emergency alert according to an embodiment. The OSMNT can indicate when the receiver's screen needs to be avoided from being obscured by other objects when vital information is provided through the video. For example, the OSMNT may indicate whether the screen of the receiving device should not be hidden when the emergency alert is provided as text or live media. The OSMNT may include a plurality of screen clear messages. Each screen clear message may correspond to a notification indicating whether or not the screen should be screened.

The AEAT and / or OSMNT may be selectively transmitted on the shared signaling channel t5010, the base PLP t5020, the link layer signaling t5030 or the lower level signaling t5040 according to the priority of the alert message included in the AEAT . The AEAT and / or OSMNT may be inserted and transmitted in the order of base PLP (t5020), link layer signaling (t5030), and low level signaling (t5040) in the shared signaling channel t5010 as the priority is gradually lowered. Depending on the embodiment, the AEAT and / or OSMNT may be transmitted with a longer transmission period as the priority is lowered gradually.

In one embodiment of the broadcast signal transmission apparatus according to the present invention, the emergency alert signaling processing unit may transmit the AEAT and / or the OSMNT to the physical layer processing unit so that the corresponding information can be inserted into the base PLP. At this time, the physical layer processing unit may insert the received AEAT and / or OSMNT into the base PLP and map it to a signal frame. At this time, the service list table can be transmitted at the IP level as lower level signaling information. The PLP to which the service list table is delivered may be indicated in the L1 signaling information. At this time, the AEAT may have different alert issuer information according to the broadcaster providing the AEAT. This alert issuer information can identify the broadcaster transmitting the AEAT. This allows each AEAT to be distinguished. The alert issuer information may have a unique value for each broadcaster.

There is an advantage that, when the emergency alert related signaling information such as the AEAT is transmitted through the base PLP, as described above, or through the shared signaling channel, the reliability of signaling information related to the emergency alert is further assured.

For example, it is assumed that a service list table for broadcast service # 1 is delivered through PLP # X and service components for broadcast service # 1 are delivered through PLP # X1 - PLP # Xn. At this time, if the broadcast receiving apparatus is already receiving the broadcast service # 1, it is not necessary to decode the PLP # X in order to decode / reproduce the broadcast service # 1. In particular, when the broadcast receiving apparatus has a limitation on the number of PLPs that can be decoded at one time, it may not decode PLP # X. In this case, if the AEAT is also transmitted in the PLP # X, which is the same route as the service list table, the certainty of obtaining the AEAT may deteriorate. In this case, if the emergency alert related signaling information such as the AEAT is transmitted through the shared signaling channel or the base PLP, the error as described above can be reduced.

6 is a diagram illustrating an operation of the emergency alert signaling processor according to another embodiment of the present invention.

First, the structure of the AEAT according to an embodiment of the present invention will be described.

The AEAT may include a table ID, version information, a broadcast stream ID, and / or at least one Alert Message. The table ID identifies the corresponding AEAT, the version information indicates the version of the corresponding AEAT, and the broadcast stream ID can identify the broadcast stream to which the corresponding AEAT is transmitted.

Each alert message may contain information about the emergency situation involved. The alert message may include identifier information, priority information, alert issuer information, valid time information, expiration time information, and / or alert description information.

The identifier information may identify the alert message. The priority information may indicate the priority of the emergency situation indicated by the alert message. The priority may be a maximum level, a high level, a moderate level, a low level, and / or a minor level. Classification of priorities can be configured differently depending on the designer. According to the priority information, the manner in which the AEAT is delivered as described above may vary.

The alert issuer information may indicate the entity that issued the alert message. The alert issuer information may be the same among alert messages in one AEAT. The validity time information may indicate the time at which the alert message is valid. The valid time information may mean a time interval during which the alert message can be effectively applied in relation to the emergency. The expiration time information may indicate the time at which the alert message should be discarded. The alert description information may provide textual data describing an emergency situation represented by the alert message as text.

As described above, according to another embodiment of the present invention, when the emergency situation indicated by the alert message of the AEAT has a certain level of priority, the emergency alert signaling processing unit transmits the corresponding AEAT to the compact sub AEAT And the main sub AEAT. Here, the specific level is a priority of the high axis, which may mean a priority level of the highest level to the high level.

The compact sub AEAT can include information for quickly grasping basic information, attributes, and the like for the alert message among the information in the alert message of the corresponding AEAT. The main sub AEAT may include information related to the emergency alert that the alarm message actually wants to be transmitted among the information in the alarm message of the corresponding AEAT.

According to another embodiment of the present invention, the emergency alert signaling processing unit may transmit the compact sub AEAT to the physical layer processing unit, and may be transmitted to the receiving side via the shared signaling channel or the base PLP. In addition, the emergency alert signaling processing unit may transmit the main sub AEAT to the IP layer processing unit and be delivered at the IP level through the dedicated transmission session described above.

The compact sub AEAT may include priority information, alert issuer information, valid time information, and / or expiration time information among the information in the original alert message. The compact sub AEAT may further include first identifier information identifying the corresponding compact sub AEAT. The first identifier information may have the same value as the identifier information in the original alert message, or may have a newly assigned value.

The main sub AEAT may include alert description information among the information in the original alert message. The main sub AEAT may further include second identifier information for identifying the main sub AEAT. The second identifier information may have the same value as the identifier information in the original alert message, or may have a newly assigned value.

The first identifier information of the compact sub AEAT and the second identifier information of the main sub AEAT may match each other. The broadcast receiving apparatus of the present invention can first determine whether it is necessary to acquire the actual data of the corresponding alarm message by accessing the compact sub AEAT and acquiring information on the corresponding alarm message. When it is necessary to acquire actual data, the broadcast receiving apparatus can attempt to access the main sub AEAT. At this time, the broadcast receiving apparatus can acquire the main sub AEAT using the matching of the first identifier information and the second identifier information.

According to another embodiment of the present invention, the emergency alert signaling processor may insert a compact sub AEAT for an alarm message having a highest priority level in a shared signaling channel, The compact sub AEAT for the alert message with the base < RTI ID = 0.0 > PLP < / RTI > This method may be useful when there is a need to place a difference between alarm messages having a relatively high priority.

According to another embodiment of the present invention, the L1 signaling information may further include AEAT flag information. The AEAT flag information may indicate whether the shared signaling channel of the corresponding signal frame includes AEAT or compact sub AEAT. According to an embodiment, the AEAT flag information may indicate whether the base PLP of the corresponding signal frame includes AEAT or compact sub AEAT. According to an embodiment, the AEAT flag information may indicate whether there is a shared signaling channel or a base PLP in the corresponding signal frame.

By the emergency alert signaling according to the various embodiments described above, the broadcast receiving apparatus can acquire an alarm message and the like to be delivered urgently and efficiently. The broadcast receiving apparatus can thereby acquire the critical emergency alert related information more quickly.

7 is a diagram illustrating an alarm message according to another embodiment of the present invention.

As described above, according to another embodiment of the broadcast signal transmitting apparatus according to the present invention, the alarm message of the AEAT may further include live media information.

The emergency alert signaling processor of the broadcast signal transmission apparatus according to the present invention may further include live media information in the alert message when generating the AEAT. The live media information is as described above. In addition to the information for identifying the emergency service, the live media information may further include service name information of the emergency service, broadcast stream identifier information to which the emergency service is transmitted, and the like.

The AEAT with live media information may be transmitted via a shared signaling channel, a base PLP, link layer signaling or lower level signaling according to the embodiments described above. In the above embodiment, in the case where the AEAT is separated, the live media information may be included in the main sub AEAT.

The emergency alert signaling processing unit of the broadcast signal receiving apparatus according to the present invention may transmit the live media information of the AEAT to the DTV control engine and / or the IP / UDP filter to allow the broadcast signal receiving apparatus to access the emergency service .

The broadcast receiving apparatus can determine through which transmission session the SLS of the emergency situation related service is delivered through the information of the live media information and the service list table described above. At this time, the service identification information of the live media information can be used to identify the emergency service among the plurality of services described by the service list table. The broadcast receiving apparatus can acquire the information related to the transmission session in which the A / V component of the service is delivered and obtain the components using the obtained SLS of the emergency service. The SLS may provide transport session description information for a transport session in which components included in the related broadcast service are delivered. The broadcast receiving apparatus can additionally provide the A / V media for the emergency according to the obtained information.

In the illustrated embodiment, the AEAT is being transmitted over a shared signaling channel. This fact is indicated by the AEAT flag information of the L1 signaling information. Each alert message included in the AEAT may have priority information and live media information, respectively.

For example, alert message # 1 may have the highest level of priority. According to the live media information in the alert message # 1, the broadcast signal receiving apparatus can access the emergency service related to the live message. Then, the broadcasting signal receiving apparatus can provide the corresponding emergency service to the viewer. The viewer can specifically touch information related to the emergency situation indicated by the alarm message # 1 in the form of A / V media data.

8 is a diagram illustrating an application layer transmission packet according to an embodiment of the present invention.

As described above, a transmission session may be identified by a combination of an IP address and a port number, and if the transmission session conforms to the ROUTE protocol, the transmission session may include at least one Layered Coding Transport (LCT) sessions.

The transport session may multiplex and transmit at least one or more service components. An LCT session can transmit one service component. The service component may be, for example, a DASH Representation. An application layer transport packet delivered over a transport session may carry a transport object, which may be a DASH segment associated with a DASH representation. The application layer transport packet can be processed and transmitted as an IP packet. An application layer transport packet may be referred to as a transport packet, an LCT packet, or a ROUTE packet depending on the context.

The transport packet includes a version number field V, a congestion control flag field C, a PSI field, a transport session identifier flag field S, a transport object identifier flag field O, a halfword flag field H, A closed object flag field B, a header length field HDR_LEN, a code point field CP, a congestion control information field CCI, a transport session identifier field TSI, a transport object identifier field TOI, , An extended header field, an FEC payload ID field, and / or a payload. Where Res (2) may be the bits left for future use. Where the FEC payload ID field is included in the ROUTE header portion and is not shown in the figure.

The version number field (V) indicates the version number of the corresponding transmission protocol. The congestion control flag field C may be a flag associated with the length of the congestion control information field. The Protocol-Specific Indication (PSI) field can be used as an indicator having a specific purpose in the protocol. The transmission session identifier flag field S indicates a flag related to the length of the transmission session identifier field. The transport object identifier flag field O indicates a flag related to the length of the transport object identifier field. The halfword flag field H indicates whether to add a half-word (16 bits) to the length of the TSI and TOI fields.

The close session flag field A indicates that the session is about to be terminated or terminated. The closed object flag field (B) indicates that the object being transmitted is about to be terminated or terminated. The header length field HDR_LEN indicates the total length of the header of the unit of 32-bit words. The codepoint field (CP) may represent information related to the encode / decode of the packet, for example a payload type. The congestion control information field (CCI) may include information necessary for congestion control, and may include a current time slot index (CTSI), a channel number, a packet sequence number of a channel, and the like. The Transmission Session Identifier field (TSI) may be the unique identifier of the session. The transport object identifier field (TOI) may be a unique identifier of the object.

The header extension field may be an extension part of the header for transmitting additional information. The FEC payload ID field includes identification information of a transmission block or an encoding symbol. The header extension field and / or the FEC payload ID field may be included in the ROUTE header. The payload may include data of a transmission block or an encoding symbol.

The application layer transport packet according to an embodiment of the present invention may include a presentation time extension header in a header extension field.

The presentation time extension header may provide presentation time related information of the payload data included in the transmission packet. The presentation time extension header may include a HET field, a HEL field, an object type field, an M field, and / or an NTP timestamp.

The HET field may indicate the type of the extension header. The HEL field may indicate the length of the corresponding extension header. The object type field may indicate the type of the transport object of the transport packet. The object type field may have a value similar to the payload type information of the original header. If the object type field has a value of 0x01 - 0x07, it indicates that the corresponding transport object has a type of file, entity, package, AC-4 based audio, MPEG-H based audio, H.264 based video, HEVC based video . The 0x00 value can be left for future use. Values up to 0x08-0x7F can represent other types. The M field may be interpreted differently depending on the object type field. For example, if the type of object for transmission is a file, it may indicate that the transport packet contains the end of the file. Here the end is the part that contains the last bit of the file. As another example, if the type of object for transmission is AV data, it may indicate that the transport packet includes the first or last bit of the access unit.

The NTP timestamp field may indicate timing information of data included in the packet payload. For example, the NTP timestamp field may contain information about when the first byte of data contained in the packet payload is decoded. As another example, the NTP timestamp field may include information on the playback timing of the data. In addition, the NTP timestamp field may include timing information based on time scale information or a time scale. Here, the time scale information may be a unit indicating a time for decoding or playback time of the transport object. The first 32 bits of the NTP timestamp field represents the incremented second information since January 1990, after which the 32 bits may represent the fraction of second information.

9 is a diagram illustrating an effect of an application layer transmission packet according to an embodiment of the present invention.

As described above, by including a presentation time extension header in a transmission packet, the broadcast receiving apparatus can have an effect (Stall-free Playback) that the broadcasting service can be reproduced without stopping.

In the drawing, when one media segment (DASH segment) is divided and transmitted into several transport packets, the header of the first transport packet (ROUTE packet # 1) may include the above presentation time extension header. This presentation time extension header can describe the expected delay time in the process of dividing the media segment at the transmitting end and encapsulating it into a packet. This delay time information is transmitted to the receiver and can be used to reproduce the broadcast service without stopping.

10 is a diagram illustrating an application layer transmission packet according to another embodiment of the present invention.

The application layer transmission packet according to another embodiment of the present invention can utilize the FEC payload ID field described above as a purpose of expressing the start offset position of the payload data.

When transmitting data in real time based on IP, FEC (Fast Error Correction) technique may not be used. Therefore, the FEC payload ID field of the transport packet may have no special meaning. In this case, the present invention can propose a scheme for utilizing the FEC payload ID field for another purpose. Particularly, the present invention can utilize the FEC payload ID field as an application for expressing the start offset position of payload data.

If the FEC payload ID field has a value of 0, it may mean that one file is not divided and is transmitted as one complete packet.

If the FEC payload ID field has a value other than 0, it means that one file is divided and transmitted in several transport packets. In this case, the value of the FEC payload ID field may indicate the location address value that the payload data transmitted by the transport packet starts from the original file. For example, if the original file having a size of 100 is divided into 70s and 30s and transmitted in different transmission packets, the FEC payload ID field value of the first packet is 0, the FEC payload ID field value of the second packet is 70 days .

11 is a diagram illustrating an effect of an application layer transmission packet according to another embodiment of the present invention.

The illustrated embodiment shows a case where a file having a size of 3,536,288 bytes is divided into a plurality of transport packets and transmitted.

The first packet (t 11010) may indicate a FEC payload ID value of zero. At this time, the transport packet may further include an extension header indicating the length of the original entire file, which indicates that the length of the entire file is 3,536,288 bytes. At this time, the payload length of the first packet may be 1428 bytes.

The last packet (t11020) may indicate a FEC payload ID value of 3,535,728. The payload length of the last packet is 560 bytes. By adding this payload length and the start offset position value indicated by the FEC payload ID value (3,535,728 + 560), the length of the entire file can be equal to 3,536,288 bytes.

In the case where one file (transport object) is divided into a plurality of transport packets and transmitted, as in the present invention, if the start offset position address of the payload data delivered by each transport packet is indicated in each transport packet, Even if the packets are transmitted in the changed order, they may not fail to collect and process each packet.

12 is a diagram illustrating a signaling method of an emergency alert through a broadcasting network according to another aspect of the present invention.

The signaling method of an emergency alert signal according to the present invention includes generating service data for broadcast services, generating a service list table, processing with IP packets, processing with link layer packets, , Processing with a signal frame, and / or transmitting.

The service data generator of the broadcast signal transmission apparatus according to the present invention can generate service data for broadcast services. The lower level signaling generator may generate a service list table indicating a transmission session in which service signaling information for broadcast services is transmitted. The IP layer processing unit may process the service data and the service table as IP packets transmitted through the transmission sessions. Here, the IP packets including the service list table can be transmitted through a dedicated transmission session having a specific IP address.

The link layer processing unit may process IP packets and / or link layer signaling information into link layer packets. Here, the link layer signaling information may include information indicating a relationship between transmission sessions and data PLPs (Physical Layer Pipes). The physical layer processing unit may process link layer packets into data PLPs. The physical layer processing unit can process the information shared among the data PLPs with the base PLP. The physical layer processing unit may process the data PLPs and / or the base PLPs as signal frames. The physical layer processing unit may further include a shared signaling channel in a signal frame. The transmitting unit may transmit the signal frame through the broadcasting network.

The emergency alert signaling processing unit of the broadcast signal transmission apparatus according to the present invention can send the AEAT to different levels of processing units according to the priority information of the alert message of the Advanced Emergency Alert Table (AEAT). Each of the processing units, that is, the IP layer processing unit, the link layer processing unit, and / or the physical layer processing unit, can include the corresponding AEAT in different areas of the signal frame. The AEAT alert message can provide information about an emergency situation.

According to another aspect of the present invention, there is provided a method for signaling an emergency alert signal, the method comprising: inserting a corresponding AEAT into the shared signaling channel when priority information indicates that the emergency situation has a highest level of priority; As shown in FIG.

The emergency signaling signaling method according to another embodiment of the present invention is characterized in that when the priority information indicates that the emergency situation has the highest level of priority, Separating; Inserting a first sub AEAT into a shared signaling channel or base PLP; Processing the second sub AEAT into IP packets; And / or a second sub-AEAT over a dedicated transport session having a particular IP address; As shown in FIG.

In the signaling method of the emergency alert according to another embodiment of the present invention, the first sub AEAT includes the first identifier information and priority information in the alarm message, alert issuer information, valid time information, and expiration time information, 2 sub AEAT may include the second identifier information and the alert description information in the alert message. The alert description information may provide textual data describing an emergency situation.

In the emergency signaling signaling method according to another embodiment of the present invention, the first identifier information of the first sub AEAT may be matched with the second identifier information of the second sub AEAT.

In the signaling method of the emergency alert according to another embodiment of the present invention, the second sub AEAT may include live media information for identifying an emergency situation related service providing A / V (Audio / Video) media data for an emergency situation The transmission session in which the service signaling information for the emergency situation related service is transmitted is indicated by the service list table, the live media information is used for identifying the emergency situation related service in the service list table, The service signaling information may provide session description information describing transport sessions that carry A / V media data for an alert message.

In a signaling method for an emergency alert signal according to another embodiment of the present invention, the signal frame further includes L1 signaling information for signaling service data in data PLPs, and the L1 signaling information includes AEAT or a first sub- And may further include flag information indicating whether or not the AEAT is included. This flag information may be the AEAT flag.

The signaling method of the emergency alert signal according to another embodiment of the present invention includes the steps of including AEAT in the link layer signaling information to generate link layer packets Processing; As shown in FIG.

According to another aspect of the present invention, there is provided a method for signaling an emergency alert signal, the method comprising: processing an AEAT into IP packets when priority information indicates that an emergency situation has a lower level priority; And / or AEAT over a dedicated transport session having a specific IP address; As shown in FIG.

A signaling method (receiving side) of an emergency alert according to an embodiment of the present invention will be described. This method is not shown in the drawings.

The signaling method of the emergency alert (receiving side) according to an embodiment of the present invention includes receiving a signal frame by the tuner, processing the corresponding signal frame by the physical layer controller to generate L1 signaling information, shared signaling information, PLP, etc., the link layer packet processor processes the link layer packet to obtain IP packets and link layer signaling information, filtering an IP stream requiring an IP / UDP filter, and / And processing the IP stream or application layer transport packets to obtain desired service data. Here, AEAT or compact sub AEAT, main sub AEAT can be obtained at each step. The signaling information may be parsed by a signaling parser. The emergency alert signaling processor on the receiver side can process the AEAT and send the necessary information to the DTV control engine. The emergency alert signaling processing unit can perform the matching and / or combining process between the compact sub AEAT and the main sub AEAT. The DTV control engine can control the broadcast signal receiving apparatus to obtain the emergency alert related service based on the information received from the emergency alert signaling processing unit.

The emergency signaling signaling method (receiving side) according to the embodiments of the present invention may correspond to the emergency signaling signaling methods according to the embodiments of the present invention described above. The signaling method of the emergency alert (receiving side) includes the parts used in the emergency signaling signaling method (for example, emergency alert signaling processing part, service data generating part, lower level signaling generating part, IP layer processing part, Processing unit, physical layer processing unit, and / or transmission unit, and the like). The signaling method (receiving side) of the emergency alert may have embodiments corresponding to the embodiments of the above-mentioned emergency alert signaling method.

The steps described above may be omitted according to the embodiment, or may be replaced by other steps performing similar / same operations.

A broadcast signal transmission apparatus according to an embodiment of the present invention will be described. This is not shown in the drawings. The broadcast signal transmission apparatus according to an embodiment of the present invention may include the emergency alert signaling processing unit, the service data generating unit, the lower level signaling generating unit, the IP layer processing unit, the link layer processing unit, the physical layer processing unit, and / have. Each part is as described above. The broadcast signal transmission apparatus and its internal modules / blocks according to an embodiment of the present invention can perform the embodiments of the emergency alert signaling method of the present invention described above.

A broadcast signal receiving apparatus according to an embodiment of the present invention will be described. This device is not shown in the drawing. The broadcast signal receiving apparatus according to an embodiment of the present invention may include the internal parts of the broadcast signal receiving apparatus and the internal parts thereof according to an embodiment of the present invention may include the signaling method of the emergency alert of the present invention ). ≪ / RTI >

The part or the like within the apparatus described above may be processors executing the sequential execution processes stored in the memory, and may be hardware elements located in / out of the apparatus according to an embodiment.

The above-described modules may be omitted according to the embodiment, or may be replaced by other modules performing similar / same operations.

Each of the above-described parts, modules or units may be a processor or hardware part that executes sequential execution processes stored in a memory (or storage unit). Each of the steps described in the above embodiments may be performed by a processor or hardware parts. Each module / block / unit described in the above embodiments may operate as a hardware / processor. Further, the methods proposed by the present invention can be executed as codes. The code may be written to a storage medium readable by the processor and thus read by a processor provided by the apparatus.

Although the drawings have been described for the sake of convenience of explanation, it is also possible to design a new embodiment by incorporating the embodiments described in each drawing. It is also within the scope of the present invention to design a computer-readable recording medium in which a program for executing the previously described embodiments is recorded according to the needs of ordinary artisans.

The apparatus and method according to the present invention are not limited to the configuration and method of the embodiments described above as described above, but the embodiments described above may be modified so that all or some of the embodiments are selectively And may be configured in combination.

On the other hand, it is possible to implement the method proposed by the present invention as a code that can be read by a processor in a computer-readable recording medium provided in a network device. The processor-readable recording medium includes all kinds of recording apparatuses in which data that can be read by the processor is stored. Examples of the recording medium that can be read by the processor include a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like, and may also be implemented in the form of a carrier wave such as transmission over the Internet . In addition, the processor-readable recording medium may be distributed over network-connected computer systems so that code readable by the processor in a distributed fashion can be stored and executed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the present invention.

In this specification, both the invention of the invention and the invention of the method are explained, and the description of both inventions can be supplemented as necessary.

It will be understood by those skilled in the art that various changes and modifications can be made therein without departing from the spirit or scope of the invention. Accordingly, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

In the present specification, the apparatus and method inventions are all referred to, and descriptions of both the apparatus and method inventions can be supplemented and applied to each other.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Accordingly, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims (18)

Generating service data for broadcast services;
Generating a service list table indicating a transmission session to which service signaling information for the broadcast services is transmitted;
Processing the service data and the service table into Internet Protocol (IP) packets delivered over transport sessions, wherein the IP packets comprising the service list are delivered over a dedicated transport session having a specific IP address;
Processing the IP packets and link layer signaling information into link layer packets, wherein the link layer signaling information comprises information indicative of a relationship between the transport sessions and data PLPs (Physical Layer Pipes);
Processing the link layer packets with the data PLPs, wherein information shared between the data PLPs is processed with a base PLP;
Processing the data PLPs and the base PLP into a signal frame, wherein the signal frame further comprises a shared signaling channel; And
Transmitting the signal frame through a broadcasting network; Lt; / RTI >
The signal frame includes the AEAT in different areas of the signal frame according to priority information of an alert message of an Advanced Emergency Alert Table (AEAT)
Wherein the alert message of the AEAT provides information on an emergency situation. 2. The method of claim 1, wherein if the priority information indicates that the emergency situation has a highest priority, the signaling method comprises:
Inserting the AEAT into the shared signaling channel;
Further comprising the steps of: receiving an emergency alert signal through a broadcast network; 2. The method of claim 1, wherein if the priority information indicates that the emergency situation has a highest priority, the signaling method comprises:
Separating the AEAT into a first sub AEAT and a second sub AEAT;
Inserting the first sub AEAT into the shared signaling channel or the base PLP;
Processing the second sub AEAT into IP packets; And
Transmitting IP packets including the second sub AEAT through the dedicated transport session having the specific IP address;
Further comprising the steps of: receiving an emergency alert signal through a broadcast network; The method of claim 3,
The first sub AEAT includes the first identifier information and the priority information, alert issuer information, valid time information, and expiration time information in the alert message, and the alert issuer information indicates the entity that issued the alert message The valid time information indicates a valid time of the alert message, the expiration time information indicates an expiration time of the alert message,
Wherein the second sub AEAT includes second identifier information and alert description information in the alert message, and the alert description information provides textual data describing the emergency situation. Way. 5. The method of claim 4,
Wherein the first identifier information of the first sub AEAT is matched with the second identifier information of the second sub AEAT. 6. The method of claim 5,
Wherein the second sub AEAT further comprises live media information identifying an emergency situation related service providing A / V (Audio / Video) media data for the emergency situation,
Wherein a transmission session to which service signaling information for the emergency service is delivered is indicated by the service list table, the live media information is used to identify the emergency service in the service list table,
Wherein the service signaling information for the emergency-related service provides session description information describing transmission sessions for delivering the A / V media data to the alert message. The method according to claim 6,
Wherein the signal frame further comprises L1 signaling information for signaling the service data in the data PLPs,
Wherein the L1 signaling information further includes flag information indicating whether the AEAT or the first sub AEAT is included in the shared signaling channel. 2. The method of claim 1, wherein if the priority information indicates that the emergency situation has an intermediate level priority, the signaling method comprises:
Processing the link layer signaling information by including the AEAT in the link layer signaling information;
Further comprising the steps of: receiving an emergency alert signal through a broadcast network; The method of claim 1, wherein if the priority information indicates that the emergency situation has a lower level priority, the signaling method comprises:
Processing the AEAT into IP packets; And
Delivering IP packets including the AEAT over the dedicated transport session having the specific IP address;
Further comprising the steps of: receiving an emergency alert signal through a broadcast network; A service data generation unit for generating service data for broadcast services;
A lower level signaling generation unit for generating a service list table indicating a transmission session through which service signaling information for the broadcast services is transmitted;
An IP layer processing unit for processing the service data and the service table into IP (Internet Protocol) packets transmitted through transmission sessions, wherein the IP packets including the service list table are transmitted through a dedicated transmission session having a specific IP address Being;
A link layer processing unit for processing the IP packets and link layer signaling information into link layer packets, wherein the link layer signaling information includes information indicating a relationship between the transport sessions and data PLPs (Physical Layer Pipes);
A physical layer processor for processing the link layer packets into the data PLPs, wherein information shared between the data PLPs is processed as a base PLP,
The physical layer processing unit processes the data PLPs and the base PLP into a signal frame, wherein the signal frame further includes a shared signaling channel; And
A transmitting unit for transmitting the signal frame through a broadcasting network; Lt; / RTI >
The signal frame includes the AEAT in different areas of the signal frame according to priority information of an alert message of an Advanced Emergency Alert Table (AEAT)
Wherein the alert message of the AEAT provides information on an emergency situation. 11. The method of claim 10, wherein if the priority information indicates that the emergency situation has a highest priority,
Wherein the physical layer processor inserts the AEAT into the shared signaling channel. 11. The method of claim 10, wherein if the priority information indicates that the emergency situation has a highest priority,
The broadcast signal transmission apparatus further includes an emergency alert signaling processing unit for separating the AEAT into a first sub AEAT and a second sub AEAT;
The physical layer processor inserts the first sub AEAT into the shared signaling channel or the base PLP,
Wherein the IP layer processing unit processes the second sub AEAT into IP packets, wherein the IP packets including the second sub AEAT are transmitted through the dedicated transmission session having the specific IP address. Broadcast signal transmission device for alarm signaling. 13. The method of claim 12,
The first sub AEAT includes the first identifier information and the priority information, alert issuer information, valid time information, and expiration time information in the alert message, and the alert issuer information indicates the entity that issued the alert message The valid time information indicates a valid time of the alert message, the expiration time information indicates an expiration time of the alert message,
Wherein the second sub-AEAT includes second identifier information and alert description information in the alert message, and the alert description information provides textual data describing the emergency situation. ≪ RTI ID = 0.0 > Transmission device. 14. The method of claim 13,
And the first identifier information of the first sub AEAT is matched with the second identifier information of the second sub AEAT. 15. The method of claim 14,
Wherein the second sub AEAT further comprises live media information identifying an emergency situation related service providing A / V (Audio / Video) media data for the emergency situation,
Wherein a transmission session to which service signaling information for the emergency service is delivered is indicated by the service list table, the live media information is used to identify the emergency service in the service list table,
Wherein the service signaling information for the emergency-related service provides session description information describing transmission sessions for delivering the A / V media data to the alert message. ≪ RTI ID = 0.0 > . 16. The method of claim 15,
Wherein the signal frame further comprises L1 signaling information for signaling the service data in the data PLPs,
Wherein the L1 signaling information further includes flag information indicating whether the AEAT or the first sub AEAT is included in the shared signaling channel. ≪ RTI ID = 0.0 > 18. < / RTI > 11. The method of claim 10, wherein when the priority information indicates that the emergency situation has an intermediate level priority,
Wherein the link layer processing unit includes the AEAT in the link layer signaling information and processes the link layer packet into the link layer signaling information. 11. The method of claim 10, wherein when the priority information indicates that the emergency situation has a lower level priority,
Wherein the IP layer processing unit processes the AEAT into IP packets, wherein the IP packets including the AEAT are transmitted through the dedicated transmission session having the specific IP address. Transmission device.

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