WO2009086712A1

WO2009086712A1 - A method, broadcasting headend and terminal for applying service guide in digital television terrestrial broadcasting transmission system

Info

Publication number: WO2009086712A1
Application number: PCT/CN2008/000501
Authority: WO
Inventors: Yiqun Li; Xiaoyu Ren; Dichun Wang; Jianghong Zhang
Original assignee: I-Vision Beijing Inc.; I-Vision Beijing Information Technology Ltd.
Priority date: 2008-01-07
Filing date: 2008-03-14
Publication date: 2009-07-16
Also published as: WO2009086697A1

Abstract

A method for applying service guide in digital television terrestrial broadcasting transmission system, contains following steps: a)generating service guide SG, as well as service guide delivery unit SGDU and service guide delivery descriptor SGDD concerning service guide SG; b)describing and configuring SGDD and SGDU based on the transmission status of each audio/video streams and data streams in digital television terrestrial broadcasting transmission system; and c)transmitting each of audio/video streams, data streams, SGDU and SGDD in network channels of digital television terrestrial broadcasting transmission system. Through the method for applying service guide SG in digital television terrestrial broadcasting transmission system in the invention, no matter the transmission mode of audio/video and data of data streams in transmission streams of digital television terrestrial broadcasting transmission system bases on IP or non-IP, service guide SG could be neatly organized, thus it is realized to accurately guide and index to these data.

Description

Method for applying service guide in digital television terrestrial broadcast transmission system

And its broadcast head and terminal related technical documents

This application relates to related IP technology standards and related digital broadcasting standards, which are respectively

GB 20600-2006 (frame structure, channel coding and modulation of digital television terrestrial broadcasting transmission system), OMA-TS-BCAST-ServiceGuide-VI-0-20070529-C (Service Guide for Mobile Broadcast Services),

OMA-TS-BCAST-DVB-Adaptation-Vl-0-20070529-C (Broadcast Distribution System Adaptation - IPDC over DVB-H), ETSI EN 301 192

VI.4.1 (Digital Video Broadcasting (DVB); DVB specification for data broadcasting), ETSI TS 102 471 (Digital Video Broadcasting (DVB); IP Datacast over DVB-H: Electronic Service Guide (ESG)), RFC3450 (Asynchronous Layered Coding) (ALC) Protocol Instantiation ), RFC3926 ( FLUTE - File Delivery over Unidirectional Transport ). This is incorporated by reference in its entirety. Technical field

The present invention relates to a digital television terrestrial broadcast transmission system, and more particularly to a method of applying a service guide in a digital television terrestrial broadcast transmission system and a broadcast head end and a terminal thereof. BACKGROUND OF THE INVENTION The present invention employs various technical terms and abbreviations in Table 1 below.

Table 1 Technical terms and abbreviations

SG Service Guide Business Guide

SGDD Service Guide Delivery Descriptor Business Guide Transfer Descriptor

SGDU Service Guide Delivery Unit Service Guide Transfer Unit

SGPD Service Guide Provider Discovery Descriptor Business Guide Provider Discovery Descriptor

SGAD Service Guide Access Descriptor Business Guide Access Descriptor

SI Service Information Business Information

TSI Transport Session Identif ier transport session ID

RFU Reserved for future use reserved for future use On August 18, 2006, the China National Standards Committee released the "Frame Structure, Channel Coding and Modulation of Digital Television Terrestrial Broadcasting Transmission System" in the "Announcement on the Approval of the Release of the Chinese National Standard No. 8 (No. 95) of 2006". The standard is a national mandatory standard, the standard number is GB 20600-2006, and it is officially implemented on August 1, 2007. The digital television terrestrial broadcast transmission system is an important part of the broadcast television system. It must not only have the basic functions of supporting traditional television broadcasting services, but also have the scalable functions adapted to the broadcasting and television services. The digital television terrestrial broadcast transmission system supports both fixed (including indoor and outdoor) reception and mobile reception modes. In fixed reception mode, standard definition digital TV service, high definition television service, digital sound broadcasting service, multimedia broadcasting and data service services can be provided; in mobile reception mode, standard definition digital television service, digital sound can be provided Broadcasting services, multimedia broadcasting and data services services. In the digital television terrestrial broadcast transmission system, the transmission of audio and video streams mainly passes

MPEG2-TS mode; data stream mainly through data piping, data streaming, multi-protocol encapsulation, data carousel, object carousel It is organized and multiplexed in the MPEG2-TS transport stream. For IP stream data (for example, transferring files via ALC/FLUTE protocol, transmitting audio and video streams by IP, etc.), digital TV terrestrial broadcast transmission systems can also be multiplexed in MPEG2-TS transmission by multi-protocol encapsulation. Transfer in the stream. The SI (Service Information) in Table 1 is service information, which is used to describe the transmission of various audio and video streams and data streams in the MPEG2-TS transport stream. The ONID (Origenal Network IDentifier) is the original network identifier used to indicate the transmission network to which the current program originally belongs, such as the Beijing cable network.

TSID (Transport Streaming IDentifier) is a transport stream identifier used to indicate the transport stream ID where the current program is located. The PID (Packet IDentifier) is a packet identifier for identifying each audio and video stream, data stream, and IP stream multiplexed in the MPEG2-TS.

SG (Service Guide) is a business guide. An example of a business guide data model is shown in Figure 1. The business guide structure and shards are defined based on the XML data format. The data fragmentation included in the data model and the relationship between each data fragment are shown in Figure 1. In addition, each data fragment also contains multiple attributes and sub-elements. The meaning of the arrows and the numbers at both ends in Figure 1 is shown in Figure 2. Figure 2 shows that an A slice can be associated with c~d B slices, and a B slice can be referenced by a~b A slices. The shards and meanings included in the Business Guide are as follows: Purchaseltem: The purchase item is the smallest unit purchased by the user. A Purchaseltem can contain 0 or more business services, or 0 or more content. Purchases Purchaseltem can be associated with a business service to enable the ordering of one or more business channels; associated with the c content ontent can be used to purchase one or some content.

PurchaseData: Quotation data, including price information and ordering interval, a quote data PurchaseData corresponds to a purchase item Purchaseltem.

PurchaseChannel: A description of how to purchase a channel, purchase a business, such as a telephone ordering method, URL ordering, and so on.

Service: A service that describes information about a mobile multimedia service. Each business service contains multiple content Content data units. A service service can represent a TV channel, such as CCTV-5, or a broadcast service, such as a data broadcast channel.

Schedule: Scheduling, scheduling of business and content items.

Content: Content, describing information about a program and the time schedule of the program in a service, a program uniquely corresponding to a service, and a service may include one or more programs.

PreviewData: preview data, used for program preview content, stipulates that users need to check Content that is presented to the user, such as program pictures, introductory text, when looking at more detailed content of a business, program, or schedule.

IneractivityData: Interaction data, describing the interaction information corresponding to the business or content. Access: Access information, which specifies the access information required by the terminal to receive and play channels, a TV program, or content distributed during a certain period of time, such as the frequency of the broadcast network, channel number, SDP, and so on.

SessionDescription: Session description, description of the IP address, port number, session start and end time, media type and media format and other session parameters. Access information of the service guide Access slice data is defined as follows:

In the following data definitions, E=Element represents an element, A=Attribute represents an attribute, El=sub-element represents a child element, E2=sub-element's sub-element represents a child element of a child element, and so on. NM indicates that the network must support, NO indicates network optional support; TM indicates that the terminal must support, and TO indicates optional support for the terminal. Access Information The Access Data Unit specifies the information that the terminal needs to play a TV program. The definition is shown in Table 2. Table 2 Access Information Access Number Compensation Definition (Excerpt)

Whether it corresponds to

Name Type Description Data Type

Access E access data unit

Id A NM/TM 1 Access data unit identifier, globally unique anyUR worker version A NM/TM 1 version number unsignedln t ( 32 bits ) validFrom A NM/TM 0 . . 1 The starting time at which the data unit is valid. If unsignedln is not given, the data unit is considered to have taken effect at some point in the past.

Val idTo A NM/TM 0 . . 1 The last moment when the data unit is valid. If unsignedln is not given, the data unit is considered to have expired at a future uncertain time.

AccessType El NM/TM 1 defines the access method

BroadcastServiceDeliver

y

UnicastServiceDelivery

BroadcastServic E2 NM/TM 0 . . 1 Broadcast Network Information

eDel ivery

BDSType E3 NM/TM 0 . . N defines the type of access network

Type E4 NM/TM 0 . . 1 0 . IPDC over DVB-H unsignedBy

1. 3GPP MBMS te

2. 3GPP2 BCMCS

3 - 127 . reserved for

Future use 128 -255. reserved for

Proprietary use

Version E4 M/TM 0..N Hosts the version of BDS, such as the string of MBMS

Rel-6 or Rel-7

SessionDescript E3 M/TM 0..N

ionRef erence

SDP E4 NM/TM 0..1 embedded SDP string

SDPRef E4 NM/TM 0..1 to SDP format [RFC 4566]

Session Description

Uri A NM/TM 0..1 Reference to external SDP information anyURI idRef A NM/TM 0..1 is referred to the 'SessionDescription' of anyURI

Slice id

USBDRef E4 NM/TM 0..1 to USBD format [26.346]

Session Description bow 1

Uri A NM/TM 0..1 to external MBMS- USBD information reference anyURI idRef A NM/TM 0..1 is referred to anyURI 'SessionDescription'

Slice id

ADPRef E4 NM/TM 0..1 to

AssociateDeliveryProcedu

Reference to re for file and streaming

[BCAST10 -Distribution]

Uri A NM/TM 0..1 to external anyURI

AssociatedDeliveryProced

Reference to ure information URI

idRef A NM/TM 0..1 is referred to the 'SessionDescription' of anyURI

Slice id

ServiceRef erenc El NM/TM 0..N Service to which this access belongs

e

idRef A NM/TM 1 Service fragmentation flag anyURI

ScheduleRef eren El NM/TM 0..N Schedule associated with this access.

Can be included in the ce Access data unit

ServicelDref or

SchedulelDRef, but not both

Instructions.

idRef A NM/TM 1 associated URI of the schedule data unit

ID.

Distribution in E2 NO/TM 0..N The integer dowID DistributionWindowID associated with the Access data unit.

Here

DistributionWindowID must

Is the Schedule referred to above by "idRef"

The full set or subset of DWIDs in the data unit.

PreviewDataRef e El NM/TM 0..N Preview the identity of the data unit, preview the data

The rence unit provides special icons, animations, etc.

idRef A NM/TM 1 This, PreviewData' fragmentation flag anyURI usage A NM/TM 1 Use of preview data: unsignedBy

0. Undefined te

Business switching

2. Business navigation browsing

3. Business preview

Barker

5-127 reserved

128-255, reserved for private

PrivateExt El NO/TO 0..1 extension

<proprietaryele E2 NO/ TO 0..N

Mess> Since the attributes of the child element AccessDescriptionReference of the sub-element BroadcastServiceDelivery of the sub-element AccessType of the access information access fragment are all IP-based transmission parameters, the access information Access fragment can only be used to describe and guide based on Various data transmitted by IP. Business Guide SG Transmission

The terminal can obtain the service guide SG in two ways, that is, through the bidirectional channel through the portal address of the known portal; or through the broadcast channel, that is, the service system SG in the manner of sending data on the broadcast channel by the broadcast system head end The broadcast terminal sends the service guide SG in a manner of receiving broadcast data. Encapsulation and Identification Each Service Guide SG Fragments are defined based on the Extended Markup Language XML format, with unique identifiers assigned to distinguish them from each other. The identifier is represented by a URI (Universal Resource Identifier), so that each service guide SG fragment is unique not only in this service guide SG, but also in all service guides SG. In transmission, it is more convenient to use integer-based identification than string-based identification, so each service guide SG fragment is assigned an integer transmission ID in addition to the fragmentation identifier (URI), which is used at the transport layer. This identifier is used to locate each service guide SG fragment. Slice ID and transport ID relationship

As mentioned earlier, each service guide SG slice has a slice identifier (URI), which is expressed in the attribute "id" of the slice. The transport ID used by the transport layer to locate the service guide SG fragment is specified by the 'fragment transport identifier (fragmentTransportID)' in the Service Guide Transport Unit (SGDU). Slice identification and The transport ID is bound by the XML unit 'fragment fragment' describing each fragment in the SGDD (Service Guide Delivery Descriptor), and its attribute 'slice transmission identifier fragmentTransportlD' corresponds to the transmission of the fragment. ID, attribute 'fragment identifier fragment ID' corresponds to the identifier of the fragment. In order for the binding to be ambiguous, the following rules should be observed:

(1) Within the validity period of a service guide SG fragment, the id of the fragment is always bound to the same 'segment transmission identifier fragmentTransportlD,

(2) For each service guide SG, 'id' and 'segment transmission identifier fragmentTransportlD' - one correspondence

The terminal shall maintain the correspondence between the fragment ID and the transport ID according to the following rules.

(3) If the terminal receives the SG Transfer Descriptor (SGDD), the value of each of the fragment fragment 'unit' fragment transmission identifier fragmentTransportlD' and the 'fragment identifier fragmentID' field shall be recorded as the correspondence.

(4) If the terminal does not find the 'segment identification fragmentID' corresponding to a 'segment transmission identifier fragmentTransportlD' in the service guide transmission descriptor SGDD, the terminal shall parse the 'fragment transmission identifier fragmentTransportlD' in the service guide transmission unit SGDU. Corresponding shards, and record the corresponding relationship.

(5) After the fragment expires, the terminal can no longer use the recorded fragment's fragment transmission identifier fragmentTransportlD, and the fragmentation identifier fragmentID. Inter-slice reference

There is a reference relationship between some service guide SG fragments, which is implemented by including a reference unit in the reference fragment, which is named after the <fragment name^DRef ⁵ in the service guide SG data definition described above. The value is of the 'anyURI' type, which is the identifier of the referenced fragment. The terminal can find the fragment in the service guide transmission unit SGDU by using the correspondence between the fragment identification and the transmission ID described above. Service Guide SG Slice Encapsulation

In order to transmit the fragment from the network to the terminal, the Service Guide SG fragment is encapsulated in a container (SGDU, Service Guide Delivery Unit Service Guide Transfer Unit) for transmission. The container (service guide transport unit SGDU) consists of three parts: header, payload and extension. It is used to encapsulate a set of service guide SG fragments into transport objects, which can be transmitted by the service guide SG Session Transfer Descriptor (SGDD). Any type of data described. The following rules should be followed when encapsulating fragments into the service guide transport unit SGDU:

(1) The field 'segment transmission identifier fragmentTransportlD' is the transmission ID to identify each service guide SG fragment in the service guide transmission unit SGDU;

(2) The content type attribute of the transport object containing the service guide transport unit SGDU should be set to "application/vnd.oma.bcast.sgdu";

The service guide transmission unit SGDU encapsulation format is as shown in Table 3. The terminal can quickly determine the service guide contained in the service guide transmission unit SGDU by using the 'fragment transmission identifier fragmentTransportlD' and 'fragmentVersion' in the service guide transmission unit SGDU encapsulation header. Whether the SG fragment is updated. Table 3 Service Guide Transfer Unit SGDU Encapsulation Format

Table 4 Service Guide Transfer Unit SGDU Package Format Table Mark Description

Business Guide Transfer Descriptor (SGDD)

Since the service guide SG fragment is transmitted in the encapsulated different service guide transport unit SGDU, it is necessary to know how to obtain the service guide transport unit SGDU in the transport stream and in which service guide transport unit SGDU the service guide SG fragments are in the broadcast. In the channel, this information is described using SGDD- Service Guide Delivery Descriptors. The Service Guide Transfer Descriptor SGDD provides the following functions: Describe the Service Guide SG Transport Session where the Service Guide SG Fragment in the Service Guide Transfer Descriptor SGDD is located; (1) locating the location of each service guide SG fragment in the service guide SG transmission session;

(2) Provide the grammatical organization of each object in the transport container, which can be a business guide SG shard or various types of files. A Service Guide Transfer Descriptor SGDD describes one or more Service Guide SG Transport Sessions, each Service Guide SG Transport Session can only be included in one Service Guide Transfer Descriptor SGDD. Just as the service guide SG fragment is encapsulated in multiple service guide transport units SGDU, the service guide SG can also be fragmented in multiple service guides to transmit descriptors.

The enumeration list is performed in the SGDD, and the terminal can easily know all the service guide SG fragments included in the service guide SG, but the terminal needs to know all the service guide transmission descriptors SGDD involved in the service guide SG. Therefore, all service guide SGDDs of the same service guide SG are placed in one and can only be sent in one transport session. This session is called the Service Guide Announcement.

Channel ). Service Guide Transfer Descriptor The SGDD structure definition is shown in Table 6, which is instantiated as an XML file during transfer. In the following data definitions, E=Element represents an element, A=Attribute represents an attribute, El=sub-element represents a child element, E2=sub-element's sub-element represents a child element of a child element, and so on. NM indicates that the network must support, NO indicates network optional support; TM indicates that the terminal must support, and TO indicates optional support for the terminal.

Table 6 Service Guide Transfer Descriptor SGDD (Excerpt)

Name - — ' . . '

Relationship

Business Guide SG Session Transfer Descriptor

Contains the following attributes:

Id

Version

ServiceGuideDeli

E

very-Descriptor

Child element:

Notif icationRecep ion,

BSMList,

DescriptorEntry SGDD is unique in a specific service guide SG

Id A N /TM 0, , 1 anyU I

Identification

Version A M/TM 0, . 1 SGDD version number unsignedlnt

Notif icationRece El NM/TM 0 . . 1 Receive information of the general notification message.

Ption If a notification message is transmitted over a two-way channel,

RequestURL specifies the address of the scheduled notification

Information, PollURL specifies the location of the polling notification

Address information.

If the element exists, then what?

IPBroadcastDelivery,

RequestURL^ PolltTRL has at least one

Must exist.

Contains the following child elements:

IPBroadcastDel ivery,

RequestURL,

PollURL

IPBroadcastDel iv E2 NM/TM 0 , , 1 provides for receiving announcement information through the broadcast channel

Ry IP multicast address and port number

Port A NM/TM 1 UDP destination port for issuing general notification messages unsignedlnt number:

Publish via broadcast channel

Address A NM/TM 1 ip multicast address for issuing general notification messages; unsignedlnt is published via broadcast channel

RequestURL E2 NM/TM 0. , 1 The terminal can subscribe to the notification of the two-way channel transmission anyURI

Message URL

PollURL E2 NM/TM 0 . . 1 The terminal can poll the notification message anyURI via the two-way channel.

URL

SGDD entry information

Contains child elements:

GroupingCriteria,

DescriptorEntry El NM/TM 1 . . N

Transport,

Alte rna t i veAc ces sURL,

ServiceGuideDel iveryUnit

Business Guide described in this SGDD portal SG

The corresponding grouping of the fragments, if there are several

According to the basis, it can be applied to the business described in this portal.

Guide SG shards.

Contains the following child elements:

TimeGroupingCriteria»

GenreGroupingCriteria»

BSMSelector,

GroupingCriteria E2 NM/TM 0...1

ServiceCriteria

' GroupingCriteria can be used as

Child elements of 'DescriptorEntry' cover

All business guides described in this portal are SG fragments.

Can also be used as a business guide SG segmentation

Child element, when both exist, the latter

Is an additional basis for grouping the shards, not

Cover the former.

The transmission corresponding to the SGDU described in this entry

Transport E2 NM/TM 0...1

Session information

ipAddress A NM/TM 1 destination IP address corresponding to the destination transport session String unsignedshor

Port A NM/TM 1 destination port corresponding to the destination transport session SrclpAddress A NM/TM 0...1 Source IP address of the transport session String transmissionSess unsignedShor

A /TM 1 TSI identifier of the session at the ALC/LCT layer

ionID t

AlternativeAcces Obtain the service guide through the interactive channel.

E2 NM/TM 0.» anyURI sURL Select URL

A set of business guides SG fragments.

Contains the following attributes:

ServiceGuideDeli transportObjectlD,

E2 NM/TM 1..N

veryUnit contentLocation,

validFrom,

validTo

SGDU carrying the SG segment of this group of service guides

The transport ID of the file corresponding to transportObjectl. (for Μ0Ί

A NM/TM 1 unsignedlnt

D transmission, this item is invalid because ordinary MOT Server

There is no interface to return this value).

contentLocation A NM/TM 1 SDGU location, in MOT header mode anyURI

When transmitting, it corresponds to the SGDU file.

'ContentName' in the header. - validFrom A NM/TM 0..1 This group guides the effective start of SG fragments. Unsignedlnt, 32bit NTP time.

Note: If there is no such item, then it must be in the business

Sub-unit specified in the South SG segment

Prime 'fragment' attribute 'validFrom'

Must exist.

validTo A NM/TM 0..1 Business Guide for this group SG fragmentation time, unsignedlnt

32bit NTP time.

Note: If there is no such item, then it must be in the business

Sub-unit specified in the South SG segment

The attribute 'validTo' of the 'fragment'

Must be present.

Fragment E3 NM/TM 1 Service Guide included in this SGDU SG fragment

Corresponding to SGDU Head Notice Service Guide SG

The transport ID of the slice, ie

TransportID A NM/TM 0...1 unsignedlnt

* f ragmentTransportID , in wide

This must be available when the broadcast channel is sent.

Id A NM/TM 1 Announced Service Guide SG Fragment Identification anyURI

Announced Service Guide Version of the SG segment.

Version A NM/TM 1 Note: This information is only unsignedlnt in a given transport session, value modulo 2 2, from 0 to 2 2_1

validFrom A NM/TM 0..1 This Service Guide Effective start time of SG fragments, unsignedlnt

32bit NT time.

Note: If this value is in the SGDU

ivalidFrom, all exist, use this

value.

validTo A NM/TM 0..1 This Service Guide SG fragmentation termination time, unsignedlnt

32bit NTP time.

Note: If this value is in the SGDU

, valiciTo, both exist, using this value.

Indicate the coding method of the service guide SG fragment.

0 - XML Encoding Service Guide SG Fragmentation

FragmentEncoding A NM/TM 0...1 unsignedlnt

1 - 127 - Reserved

128-255 - Private extension BCAST SG fragment class indicating XML encoding

Type, as defined below:

0 - not specified

1 - ^ Service 'Slice

2 - ^x Content 'Slice

3 - ^Λ Schedule 'Slice

4 - ¹ Access 'slice

Fragment Type A /T 0...1 5 - ^ Purchaseltem' Shard unsignedlnt

6 - ^ PurchaseData 'Slice

7- , Pu r cha s e Channe 1 'Slice

8 - ' PreviewData ' slice

9 - ¹ Interactivity-Data 'Slice

10 - 127 - Reserved, as BCAST extension

use

128 -255 - for private extension

PrivateExt (El ) El NO/TO 0...1 Extended Information

<proprietary

E2 NO/TO 0..«N

Elements> (E2 ) extended information

Since the attributes in the sub-element IPBroadcastDelivery of the child element NotificationReception of the element of the service guide transfer descriptor SGDD, ServiceGuideDeliveryDescriptor, are IP-based transmission parameters, the service guide transfer descriptor SGDD can only be used to describe and guide IP-based transmission. Announcement

"In the interest. Since the attributes in the sub-element Transport of the sub-element DescriptorEntry of the element ServiceGuideDeliveryDescriptor of the service guide transfer descriptor SGDD are IP-based transport session parameters, the service guide transfer descriptor SGDD can only be used to describe and Guide the IP-based transmission of the service guide transmission unit SGDUo Service Guide SG for broadcast transmission on the broadcast channel, the Service Guide SG uses the File Transfer Protocol for transmission. The following rules apply:

(1) Service Guide The SG fragments are encapsulated in a plurality of service guide transmission units SGDUs in the format defined in Table 3, and each service guide transmission unit SGDU is distributed as a separate file. The service guide transport unit SGDU can be carried out in one or more sessions W transmission

(2) All service guide transmission units SGDUs are encapsulated in one or more service guide transmission descriptors SGDD in accordance with the format defined in Table 6. Each Service Guide Transfer Descriptor SGDD is distributed as a separate file. A Service Guide Transfer Descriptor The SGDD can declare a Service Guide Transfer Unit SGDU session or can declare multiple Service Guide Transfer Unit SGDU sessions. Service Guide Transfer Descriptor The SGDD is transmitted in the Service Guide SG Announcement Session, with one and only one Service Guide SG Announcement Session in one frequency point. Business Guide SG Transmission

As shown in Figure 3, the Service Guide SG can transmit in one or more file transfer sessions. Annoucement Session is used to send the Service Guide Transfer Descriptor SGDD that declares the Service Guide SG Transport Session. Only one service guide SG is broadcast at the same time. Bootstrapping session

When multiple sets of service guide SG data need to be transmitted in a broadcast network, multiple service guide SG advertisement sessions are required, and each advertisement session describes a set of service guide SG's service guide transmission descriptor SGDD. Multiple Service Guide Delivery Descriptors SGDD is described by the bootstrap data transmitted in the Service Guide SG Bootstrap Session. Bootstrap sessions have well-known transmission parameters, such as IP addresses and ports when transmitting over IP. When there is only one set of Business Guide SG data, a bootstrap session may not be needed. Announcement session

The announcement session is used to transmit the service guide transfer descriptor SGDD, which is transmitted by file. Each service guide transfer descriptor SGDD is distributed as a file and can be distributed after GZIP compression. The service guide can be obtained through the service guide transfer descriptor SGDD in the session. The information of the transport unit SGDU transport session and the information of the SG fragment included in the service guide transport unit SGDU. The advertised session has well-known transmission parameters. For example, when transmitting by IP, a well-known IP address and port are used. When there is no bootstrap session, the notification session can be accessed through the well-known transmission parameters. There can only be one service guide SG in the entire network. When there is a bootstrap session, the transmission parameters specified in the bootstrap session are preferred. For example, when transmitting by IP, using a well-known IP address and port, you can have multiple sets of service guides SG. In order to reduce the transmission load, the Service Guide Transfer Descriptor SGDD can be compressed and transmitted. The following rules and constraints should be followed:

(1) If the service guide transfer descriptor SGDD is compressed, the GZIP compression algorithm should be used;

(2) The terminal shall support both the normal service guide transport descriptor SGDD and the compressed service guide transport descriptor SGDD parsing. Service Guide SG Transport Session Service Guide The SG Transport Session is used to transport the Service Guide Transport Unit SGDU, and each Service Guide Transport Unit SGDU is distributed as a file. In order to reduce the size of the service guide transmission unit SGDU, the service guide transmission unit SGDU may be compressed and sent in the network, and the following rules and constraints shall be followed:

(1) If the service guide transport unit SGDU is compressed, the GZIP algorithm should be used (see RFC 1952, "GZIP file format specification version 4.3");

(2) The terminal should support both the normal service guide transport unit SGDU and the compressed service guide transport unit SGDU resolution. Business Guide SG Update

Service Guide SG Fragment Update: The Service Guide Transfer Unit SGDU for the service guide The content of the slice portion is updated and the version of the service guide transfer unit SGDU header is updated. Transmitting the transport ID and file version (if any) of the service guide transport unit SGDU and resending, and updating the service guide transport descriptor SGDD content declaring the service guide transport unit SGDU with the new transport ID and file version ( If there is) send it. Service Guide SG fragmentation: Add the fragmentation information to the existing service guide transport unit SGDU or the new service guide transport unit SGDU, and send the service with the new transport ID (TOI) and the file version (if any). Guide Transfer Unit SGDU file. At the same time, the service guide transfer descriptor SGDD content declaring the service guide transport unit SGDU is updated (or the new service guide transfer descriptor SGDD) and sent with the new transport ID and the file version (if any), and the service guide is transmitted. The descriptor SGDD is located in the FDT and sent. Service Guide SG Fragment Removal: The service guide transport unit SGDU is removed from the content of the fragment part and updates the service guide transport unit SGDU header. Change the transport ID of the service guide transport unit SGDU and the file version (if any) and resend. At the same time, the service guide transfer descriptor SGDD content declaring the service guide transport unit SGDU is updated and transmitted with the new transport ID and the file version (if any). Addition of Service Guide Transfer Unit SGDU: Create a new Service Guide Transfer Unit SGDU file and declare it in the Service Guide Transfer Descriptor SGDD. The service guide transport unit SGDU file and the service guide transport descriptor SGDD file are transmitted in the respective transport session with the new transport ID and file version (if any). Deletion of the service guide transmission unit SGDU: The declaration related to the service guide transmission unit SGDU is removed in the corresponding service guide transmission descriptor SGDD, and the transmission of the service guide transmission unit SGDU file is stopped in the transmission session of the service guide SG. When the SG fragment changes in the service guide, the encapsulation of each layer and the transport layer change as shown in Figure 4. Business Guide SG Discovery

Business Guide SG Discovery Through Business Guide SG Announcement Session (SG Announcement

Session) implementation. Service Guide The Service Guide Transfer Descriptor (SGDD) is included in the SG Announcement session. Through the service guide transfer descriptor SGDD, you can obtain the transmission parameters of the service guide SG data, and then obtain the service guide SG data.

Discovery Service Guide The SG advertisement session itself can be used in two ways:

(1) Directly discovering the advertisement session, that is, the service guide SG advertises that the session itself has well-known transmission parameters, for example, when transmitting by IP, using a well-known broadcast IP address and port number;

(2) Through the Service Guide SG Bootstrapping Session Discovery Service Guide SG Announcement Session. Direct Discovery Service Guide SG Announcement Session

For example, when the IP transmission is used, when there is one and only one service guide SG in a broadcast network, the way to directly discover the service guide SG to advertise the session can be obtained. In this case, the service guide SG announcement session has the following provisions:

( 1 ) Service Guide The SG advertisement session has a fixed destination IP address (such as IPv4 address 224.0.23.165 or IPv6 address FF0X:0:0:0:0:0:0:132);

( 2) Service Guide The SG announcement session has a fixed target port number (such as 4090);

(3) Service Guide SG Announcement Session is not bound to the source IP address. By Service Guide SG Bootstrapping Session Discovery Service Guide SG Announcement Session

Sometimes there are multiple SPs (Service Provider Service Providers) in a broadcast network. Each Service Provider SP provides its own Business Guide SG. In this case, multiple sets of Service Guide SG data need to be transmitted in one broadcast network. In this case, multiple service guide SG advertised sessions are required, each advertised session describing a set of service guide SG's Service Guide Transfer Descriptor SGDD. Multiple Service Guide Delivery Descriptors SGDD Bootstrap data descriptions transmitted by the Business Guide SG Bootstrapping Session.

Business Guide SG Bootstrap Data Definition There are two types of business guide SG bootstrap data:

The Service Guide Provider Discovery Descriptor (SGPD) describes the Service Guide Access Descriptor (SGAD) in XML format and describes it in binary format.

SG Provider Discovery Descriptor SGPD

Business Guide Provider Discovery Descriptor SGPD describes the basic information of a music service provider in XML form.

Table 7 SG Provider Discovery Descriptor SGPD

Business Guide Access Descriptor SGAD

Service Guide Access Descriptor SGAD describes the service guide of each service provider. The IP flow parameters of the SG advertisement session, that is, the IP address of the service guide SG advertisement session, the port and the transport session identifier TSI. Based on these parameters, the client can locate the service guide SG advertisement session of each SP and obtain the service guide transfer descriptor SGDD to obtain the service guide SG data.

The SG access descriptors are organized in a binary fashion, as shown in FIG. The following is the syntax definition of the Service Guide Access Descriptor SGAD - Table 8 SGAccessDescriptor Syntax

Field description:

N—o—SGEntries: The number of subsequent SG descriptions (SGEntry).

SGEntry: Service Guide for an SP SG advertises data blocks for session parameters Table 9 SGEntry syntax

Field Description -

SGEntryVersion: This SGEntry version number. When the data changes, the version number is incremented by 1. When the version number reaches 255, the upgrade version number is reset to zero again.

SGEntryLength: The length of this SGEntry, in bytes. Does not include the SGEntryVersion and SGEntryLength fields.

MultipleStreamTransport: A 1 in this bit indicates that the parameters contained in this SGEntry point to a Service Guide SG advertisement session. A value of 0 indicates that the parameters contained in the SGEntry point directly to the service guide SG session containing the service guide transport unit SGDU. This field must be 1 in the current version. IPv6: Indicates whether subsequent session parameters are based on IPv6. The value of this field is 1 for IPv6 and 0 for IPv4.

ProviderlD: Service provider ID. This field corresponds to the ProviderlD in the Service Guide Provider Discovery Descriptor SGPD. The terminal associates a service guide with this field. The SG provider description and its service guide SG announces the session parameters (SGEntry).

SrcIPv6: The source IPv6 address will be 3⁄4.

DestIPv6: The destination IPv6 address of the session.

SrcIPv4: Source IPv4 address of the session.

DestIPv4: The destination IPv4 address of the session.

Port: The port number of the session.

TSI: The TSI value of the session. The identifier for the session in the ALC-based file transfer protocol. Business Guide SG Bootstrap Data Acquisition

Taking IP transmission as an example, the bootstrap data of the service guide SG is transmitted in the service guide SG bootstrapping session and has the following provisions:

(1) The IP bootstrapping session always has the destination IP address 224.0.23.14, or the IPv6 address FF0X:0:0:0:0:0:0:12D

( 2 ) The port number of the IP bootstrapping session is fixed at 9214

(3) The IP bootstrapping session usually does not bind the source IP address.

(4) In an IP bootstrap session, the service guide provider discovery descriptor SGPD and the service guide access descriptor SGAD are differentiated by the type of content (Content-Type). The Content-Type of the Service Guide Provider Discovery Descriptor SGPD shall be text/xml; the service access specification SGAD's Content-Type shall be application/vnd.oma.bcast.sgbooto Business Guide SG Discovery Implementation Guide

The broadcast network should provide a corresponding signaling mechanism to ensure that IP flows can be correctly discovered and obtained. For example, in a DVB broadcast network, the TS and PID in which each IP stream is located can be located through SI information (NIT/BAT, INT, SDT, PAT/PMT). For the broadcast headend, for example, by IP transmission, you can use either of the two service guide SG discovery mechanisms:

(1) Use the IP 224.0.23.165 or IPv6 FF0X:0:0:0:0:0:0: 132 port 4090 Broadcast Service Guide Transfer Descriptor SGDD. Service Guide Transfer Descriptor Description in SGDD Service Guide Session Parameters for SG Entity Data

(2) Using the IP 224.0.23.14 or IPv6 FF0X:0:0:0:0:0:0: 12D port 9214 broadcast service guide SG bootstrap data, the session parameters of the service guide transfer descriptor SGDD broadcast are bootstrap data Described in. Service Guide The SG entity session parameters are described in the Service Guide Transport Descriptor SGDD.

Any of the other two services may not use the two well-known IP and port numbers mentioned above.

For broadcast terminals, for example, by IP transmission, the service guide SG discovery follows the following procedure: First check whether the IP 224.0.23.14 or IPv6 FF0X:0:0:0:0:0:0: 12D port 9214 session exists. (Optionally, the broadcast terminal may also skip checking the well-known bootstrap session of the service guide SG, and directly check whether the well-known advertisement session of the service guide SG exists. If yes, the terminal should directly receive the service guide transmission from the session. Descriptor SGDD). If it exists, it means that the front end uses the service guide SG bootstrapping. The terminal should first obtain bootstrapping data (such as the service guide provider discovery descriptor SGPD or the service guide access descriptor SGAD); obtain the service guide of the SP by parsing the bootstrapping data and selecting the service provider (may require user confirmation) Transfer descriptor SGDD session parameters; if IP 224.0.23.14 or IPv6 FF0X:0:0:0:0:0:0: 12D port 9214 session does not exist, check IP 224.0.23.165 or IPv6 FF0X:0:0: 0:0:0:0: 132 Does the port 4090 session exist? If it exists, it means that the system does not use the service guide SG bootstrapping. The terminal should receive the service guide transmission descriptor SGDD directly from the session; if both the above sessions fail, the service guide SG fails to be directly obtained from the broadcast channel. The terminal may choose to obtain the service guide transmission descriptor SGDD or service through the interactive channel. Guide to SG entity data. The terminal obtains the service guide transmission descriptor SGDD according to the session parameter of the service guide transmission descriptor SGDD, and obtains the session parameter of the service guide transmission unit SGDU by parsing the service guide transmission descriptor SGDD; the terminal acquires and parses the service guide transmission unit SGDU according to the session parameter. The terminal finally obtains the entity data of the service guide SG; The process of the terminal service guide SG discovery can be represented by the flowchart shown in FIG. 5. Since the bootstrap session of the service guide SG is established by IP, and only the description of the service guide advertisement session transmitted by IP is supported in the service guide access descriptor SGAD. Therefore, the acquisition and discovery of bootstrap information in the service guide can only be performed by IP. Compared with the original electronic program guide EPG of the digital television terrestrial broadcast transmission system, the service guide SG has more powerful functions and better service scalability. In particular, the Service Guide SG enhances the support of interactive applications, greatly facilitating operators to deploy and distribute interactive value-added applications across broadcast networks, communication networks and the Internet. However, since it only supports the guidance and indexing of various IP-based audio and video streams and data streams, the Service Guide SG cannot directly direct and index non-IP based audio and video streams and data streams in digital television terrestrial broadcast transmission systems. Summary of invention

Since the transmission of audio and video streams and data streams of the digital television terrestrial broadcast transmission system is mainly performed by a non-IP based method, the service guide SG cannot directly guide and index non-IP based audio and video streams and data streams, and thus the service The many features and advantages of the Guide SG cannot be utilized by digital television terrestrial broadcast transmission systems. In order to solve the above problems of the prior art, the present invention proposes a method of applying a service guide SG in a digital television terrestrial broadcast transmission system, which overcomes the above-mentioned drawbacks of the prior art. In order to solve the above technical problem, a digital television terrestrial broadcast transmission system is provided. The method of applying the service guide includes the following steps: a) generating a service guide SG in a digital television terrestrial broadcast transmission system, and a service guide transmission unit SGDU and a service guide transmission descriptor SGDD related to the service guide SG; b) based on each tone The video stream and the data stream describe and configure the SGDD and SGDU in the digital television terrestrial broadcast transmission system; and c) transmit the audio and video streams, data streams, SGDUs and SGDDs in the network channel of the digital television terrestrial broadcast transmission system. To solve the above technical problem, a broadcast head end for applying a service guide in a digital television terrestrial broadcast transmission system is provided, the broadcast head end including an MPEG2-TS multiplexer, and further comprising: a service configuration system, in a digital television terrestrial broadcast The service guide SG is generated in the transmission system, the service guide transmission unit SGDU and the service guide transmission descriptor SGDD related to the service guide SG, and the SGDD is described and configured based on the transmission situation of each audio and video stream and the data stream in the digital television terrestrial broadcast transmission system. And SGDU, and each audio and video stream, data stream, SGDU and SGDD are transmitted through the network of the digital television terrestrial broadcast transmission system. To solve the above technical problem, a broadcast terminal for applying a service guide in a digital television terrestrial broadcast transmission system is provided, the broadcast terminal comprising an MPEG2-TS demultiplexing module, and further comprising: a SG unpacking machine for using MPEG2-TS The demultiplexing module obtains the service guide SG information; and the service guide SG module, which obtains the SGDD data from the MPEG2-TS demultiplexing module and the SG unpacking machine, parses the SGDD data, obtains the transmission information of the SGDU, and transmits the information according to the SGDU. The SGDU data is obtained in the MPEG2-TS demultiplexing module and the SG depacketizer, and the SGDU data is parsed, and the transmission information of each audio and video stream and the data stream in the MPEG2-TS transport stream is obtained, and then output to the application module. Because the service guide SG has stronger interactive service expansion capability than the original EPG of the digital TV terrestrial broadcast transmission system. The application of the service guide SG to the digital television terrestrial broadcast transmission system by the method of the present invention has many advantages: by the method of applying the service guide SG in the digital television terrestrial broadcast transmission system of the present invention, regardless of the digital television terrestrial broadcast transmission system Audio and video in the transmission channel Whether the data stream data transmission method is IP-based or non-IP-based, the service guide SG can be flexibly organized to achieve accurate guidance and indexing of the data. With the method of applying the service guide SG in the digital television terrestrial broadcast transmission system of the present invention, whether the transmission method of the service guide SG itself in the transmission channel of the digital television terrestrial broadcast transmission system is IP-based or non-IP-based, the service guide The SG itself can be easily sent and retrieved. With the method of applying the service guide SG in the digital television terrestrial broadcast transmission system of the present invention, whether the transmission mode of the emergency broadcast information in the transmission channel of the digital television terrestrial broadcast transmission system is IP-based or non-IP-based, the service guide SG Both can be accurately guided and indexed. By using the method of applying the service guide SG in the digital television terrestrial broadcast transmission system of the present invention, various enhancement functions of the service guide SG are realized without changing the working mechanism of the digital television terrestrial broadcast transmission system, for the digital television floor. The broadcast transmission system provides reliable technical support and implementation means by accessing various interactive value-added applications through the service guide SG. The matureness and scalability of the service guide SG itself brings rich and expandable operation space. Thus, it provides a rich application for users of digital television terrestrial broadcast transmission systems, and also creates a value-added space for the operation of digital television terrestrial broadcast transmission systems. BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is an example diagram of the business guide SG data model;

Figure 2 shows the association diagram between the A slice and the B slice;

Figure 3 is a schematic diagram showing the SG transmitting in one or more file transfer sessions; Figure 4 is a diagram showing the change of each layer encapsulation and transport layer when the SG fragment changes;

Figure 5 is a flow chart showing the discovery of the terminal service guide SG; 6 is a schematic diagram showing the head end of a digital television terrestrial broadcast transmission system using the service guide SG;

Figure 7 is a schematic diagram showing a terminal of a digital television terrestrial broadcast transmission system using the service guide SG;

Figure 8 shows a flow chart of the application service guide SG in the head end of the digital television terrestrial broadcast transmission system;

Figure 9 is a flow chart showing the application of the service guide SG in the terminal of the digital television terrestrial broadcast transmission system;

Figure 10 shows the service guide access descriptor format 1;

Figure 11 shows the Service Guide Access Descriptor Format 2. detailed description

Additional features and advantages of the invention will be set forth in the description in the description in the claims. The foregoing description of the preferred embodiments of the invention, These and other embodiments will be apparent to those skilled in the art from the <RTIgt; The technical features and implementation details of the present invention are further described below. Business Guide Modification of SG Data Definition

In order to transform the service guide SG into an indexable and steerable audio and video stream and data stream of the digital television terrestrial broadcast transmission system, the present invention modifies part of the service guide SG fragmentation data definition with reference to the OMA-BCAST service guide model. Modify the content and modify the service guide SG fragments involved as follows: Add the element DMBBroadcastPara to the access information Access fragment data definition of the service guide SG. In an embodiment, the element DMBBroadcastPara is added as a child element to the child element PrivateExt of the element Access in the Access Information Access tile. The element DMBBroadcastPara is used to describe the broadcast network parameters of the digital television terrestrial broadcast transmission system. DMBBroadcastPara contains the following attributes: onID, tsID, MediaType, ProtocolType. DMBBroadcastPara also contains the child element ServiceComponentID. The attribute onID is used to describe the original network ID where the service component is located. The attribute tsID is used to describe the transport stream ID where the service component is located. The attribute MediaType is used to describe the type of the business component. This type can be MPEG-1 video (ISO-11172), MPEG-2 video (ISO-13818), MPEG-1 audio

(ISO-11172), MPEG-2 audio (ISO-13818), private data (ISO-13818), PES (Packetized Elementary Stream packed base stream) private data, MHEG (ISO-13522), DSM-CC (ISO -13818), ITU-T H.222, etc. The attribute ProtocolType is used to describe the type of protocol used by the digital television terrestrial broadcast transmission system to transmit audio and video streams and data streams. The type may be a packet elementary stream PES or a data pipe Data Piping or a data carousel DSM-CC DC or an object carousel DSM-CC OC. The child element ServiceComponentID is used to describe the package identifier PID of the service component. The modification of the access information Access fragment is shown in Table 10. Table 10 Modifications to Access Information Access Fragments

Modification of the Business Guide Transfer Descriptor (SGDD)

To transform the Service Guide SG into an indexable and steerable audio and video stream and data stream for a digital television terrestrial broadcast transmission system, refer to the OMA-BCAST Service Guide Model, The invention has modified the definition of the Service Guide Transfer Descriptor SGDD. Add the element DMBBroadcastDelivery to the Service Guide Transfer Descriptor SGDD. In an embodiment, the element DMBBroadcastDelivery is added as a child element to the child element NotificationReception of the element ServiceGuideDeliveryDescriptor of the Service Guide SG Transfer Descriptor. The element DMBBroadcastDelivery is used to provide channel parameters for receiving emergency broadcast notification messages in the broadcast channel. The child element DMBBroadcastDelivery contains the following attributes: onID , tsID , MediaType , ProtocolType , and also contains child elements

ServiceComponentID.

The attribute onID is used to describe the original network ID where the service component is located.

The attribute tsID is used to describe the transport stream ID where the service component is located. Attributes MediaType is used to describe the type of business component. This type can be MPEG-1 video (ISO-11172), MPEG-2 video (ISO-13818), MPEG-1 audio (ISO-11172), MPEG-2 audio (ISO-13818), private data (ISO-13818) ), PES (Packed Elementary Stream packed basic stream) private data, MHEG (ISO-13522), DSM-CC (ISO-13818), ITU-T H.222, etc. The attribute ProtocolType is used to describe the type of protocol used by the digital television terrestrial broadcast transmission system to transmit audio and video streams and data streams. This type can be packet elementary stream PES or data pipe Data Piping or data carousel DSM-CC DC or object carousel DSM-CC OC. Child element ServiceComponentID is used to describe the packet identifier of the emergency broadcast transmission.

PID. Add the element DMBTransport to the Service Guide Transfer Descriptor SGDD. In an embodiment, the element DMBTransport is added as a child element to the child element DescriptorEntry of the element ServiceGuideDeliveryDescriptor of the Service Guide SG Transfer Descriptor. The sub-element DMBTransport is used to describe the transport session in which the service guide transport unit SGDU described in the service guide SG transport descriptor entry is located. The child element DMBTransport also contains the following attributes: onID, tsID, MediaType, ProtocolType. The child element DMBTransport also contains the child element ServiceComponentID. The attribute onID is used to describe the original network ID where the service component is located. The attribute tsID is used to describe the transport stream ID where the service component is located. The attribute MediaType is used to describe the type of the business component. This type can be MPEG-1 video (ISO-11172), MPEG-2 video (ISO-13818), MPEG-1 audio (ISO-11172), MPEG-2 audio (ISO-13818), private data (ISO-13818) ), PES (Packed Elementary Stream packed basic stream) private data, MHEG (ISO-13522), DSM-CC (ISO-13818), ITU-T H.222, etc. The attribute ProtocolType is used to describe the type of protocol used by the digital television terrestrial broadcast transmission system to transmit audio and video streams and data streams. The type may be a packet elementary stream PES or a data pipe Data Piping or a data carousel DSM-CC DC or an object carousel DSM-CC OC. The child element ServiceComponentID is used to describe the packet identifier PID of the SGDU transport session. The modifications to the Service Guide SG Transfer Descriptor are shown in Table 11 and Table 12: Table 11 Modifications to the Emergency Broadcast Guide section of the Service Guide SG Transfer Descriptor

Table 12 Modifications to the Service Guide Transfer Unit SGDU Boot Section in the Service Guide SG Transfer Descriptor

Business Guide Access Descriptor SGAD Modification

In order for the service guide access descriptor SGAD to support the description of the service guide advertisement session transmitted by non-IP mode. Modify the SGEntry syntax of the Service Guide Access Descriptor SGAD. Add the following fields to SGEntry: protocolType: The protocol type used by the session. The value of this field is 0 for IP; 1 for Data Pipe; 2 for DSM-CC DC; 3 for DSM-CC OC; remaining values reserved.

onID: The original network ID where the session is located.

tsID: The transport stream ID where the session is located.

ServiceComponentID: The PID of the SGDD transport session. And modify the SGEntry syntax, see Table 13. Table 13 SGEntry syntax

When used to describe a service guide SG advertised session in a non-IP manner, the structure of the service guide access descriptor SGAD is as shown in FIG. The service guide SG and the implementation guide of the discovery service guide SG are transmitted through the data pipe Data Piping mode (optionally, the data carousel DSM-CC DC or the object carousel DSM-CC OC mode). For the broadcast headend, you can use either of the two service guide SG discovery mechanisms:

(1) Broadcast the service guide SG bootstrapping data with the well-known bootstrapping session of the service guide SG (for example, onID = 0x02; tsID = 0x04; ServiceComponentID = 0x3000), and the session parameters of the service guide transmission descriptor SGDD broadcast in the bootstrap data. Description (for example, set the field protocolType of the SGEntry to 1 in the Service Guide Access Descriptor SGAD (optionally, the protocolType is set to 2 or 3 when transmitting using the Data Carousel DSM-CC DC or the Object Carousel DSM-CC OC mode) ), that is, using the data pipe Data Piping method, and setting the notification session parameters of the service guide SG in the branch of if(protocolType != 0), for example: onID = 0x02; tsID = 0x04; ServiceComponentID - 0x4000). Business Guide The SG entity session parameters are described in the Service Guide Delivery Descriptor SGDD.

(2) Broadcast the Service Guide Transfer Descriptor SGDD with the well-known advertisement session of the Service Guide SG (for example, onID = 0x02; tsID = 0x04; ServiceComponentID = 0x4000). Service Guide Transfer Descriptor The session parameters described in the SGDD for the Service Guide SG Entity Data. Any other service may not use the above two well-known transmission parameters. For broadcast terminals, the service guide SG's discovery follows the following process: When using the data pipe Data Piping mode:

First check the well-known bootstrapping session of the service guide SG (eg onID = 0x02; tsID = 0x04; ServiceComponentID = 0x3000). (Optionally, the broadcast terminal can also skip the check of the well-known bootstrapping session of the service guide SG, directly Check whether the well-known advertisement session of the service guide SG exists. If it exists, the terminal should receive the service guide transfer descriptor (SGDD) directly from the session. If it exists, it means that the front end uses the service guide SG bootstrapping. The terminal should first obtain bootstrap data (such as the Service Guide Provider Discovery Descriptor SGPD or Service Guide Access Descriptor SGAD); by parsing the bootstrap data and selecting the service provider (may require the user to be Acquire), obtain the service guide transfer descriptor SGDD session parameter of the SP; if the well-known bootstrapping session of the service guide SG (for example, onID = 0x02 _; tsID = 0x04 _; ServiceComponentID = 0x3000) does not exist, check the well-known notice of the service guide SG Session (eg onID = 0x02; tsID = 0x04; ServiceComponentID = 0x4000) exists. If it exists, it means that the system does not use the service guide SG bootstrapping. The terminal should receive the service guide transmission descriptor SGDD directly from the session; if both the above sessions fail, the service guide SG fails to be directly obtained from the broadcast channel. The terminal may select to obtain the service guide transmission descriptor SGDD or the service guide SG entity data through the interaction channel. The terminal obtains the service guide transmission descriptor SGDD according to the session parameter of the service guide transmission descriptor SGDD, and obtains the session parameter of the service guide transmission unit SGDU by parsing the service guide transmission descriptor SGDD; the terminal acquires and parses the service guide transmission unit SGDU according to the session parameter. The terminal finally obtains the entity data of the service guide SG; The process of the terminal service guide SG discovery can be represented by the flowchart shown in FIG. 5. The method of the present invention can be implemented in an existing digital television terrestrial broadcast transmission system, such as the exemplary digital television terrestrial broadcast transmission system shown in Figures 6 and 7, which will be described below in connection with Figures 6 through 9. The process of applying the service guide SG in the transmission system. The service guide SG can transmit in the broadcast head end 100 of the digital television terrestrial broadcast transmission system shown in FIG. 6 in accordance with the flow shown in FIG. The following is a detailed description of the video stream that is indexed by the service guide SG. The following embodiments are transmitted in a hybrid manner, that is, the service guide SG transmits by means of IP (for example, by transmitting files through the ALC/FLUTE protocol), and the audio and video streams are transmitted. PES Streaming mode.

(1) It is assumed that a program stream program1 is included in the audiovisual stream and the data stream transmitted by the broadcast head end 100 of the digital television terrestrial broadcast transmission system, and the program stream includes a video stream video1 and an audio stream audiol. The video stream videol is configured and sent in the MPEG2-TS transmission channel with the following parameters:

The video stream videol originally belongs to a network with an identity value of 0x02; it is transmitted in a transport stream identified as 0x04; its media type is MPEG-2 video; its transport protocol type is a PES stream; it passes in the MPEG2-TS transport stream The packet identification value PID with a value of 0x1000 is identified;

The audio stream audiol is configured and sent in the MPEG2-TS transmission channel with the following parameters:

The audio stream audiol originally belongs to a network with an identity value of 0x02; it is transmitted in a transport stream identified as 0x04; its media type is MPEG-2 audio; its transport protocol type is PES stream; it passes in the MPEG2-TS transport stream The packet identification value PID with a value of 0x2000 is identified;

(2) The service configuration system 104 generates a service guide transmission unit SGDU, and describes the above transmission parameters in the service guide transmission unit SGDU for the element DMBBroadcastPara of the video stream video1 of the program stream program1 and the element DMBBroadcastPara of the audio stream audiol. For example, in the access information access fragment of the program stream program1, the element of the Access element, a sub-element of the PrivateExt, DMBBroadcastPara, describes the transmission parameter of the video stream videol, 艮 P :

onID = 0x02 _; (refer to the definition in Table 10, the same below)

tsID = 0x04;

MediaType = 0x01020000; (ie MPEG-2 video)

ProtocolType = 15; (ie PES stream)

ServiceComponentID = 0x1000;

And the transmission parameter of the above audio stream audio is described in another sub-element DMBBroadcastPara of the sub-element PrivateExt of the element Access in the access information Access slice of the program stream program 1, 艮P: onID = 0x02; (refer to the definition in Table 10, the same below)

tsID = 0x04;

MediaType = 0x01040000; (ie MPEG-2 audio)

ProtocolType = 15; (ie PES stream)

ServiceComponentID = 0x2000; Service Configuration System 104 Configuration Service Guide Transfer Unit Transmission Parameters of SGDU: Service Guide Transfer Unit The SGDU is transmitted in an IP stream with an IP address of 232.0.2.51 and port number 5010.

(3) The service configuration system 104 generates a service guide transmission descriptor SGDD and describes the above-mentioned transmission parameters in the element transport section of the service guide transmission unit SGDU transmission mode (see Table 6) in the service guide transmission descriptor SGDD. For example, in the service element transfer descriptor SGDD element, the child element of ServiceGuideDeliveryDescriptor, the sub-element of DescriptorEntry, Transport, describes the above transfer parameters, namely:

ipAddress = 232.0.2.51;

Port = 5010 Service Configuration System 104 Configuration Service Guide Transfer Descriptor Transmission Parameters of SGDD: Service Guide Transfer Descriptor SGDD is transmitted in an IP stream with IP address 224.0.23.165 and port number 4090.

(4) Service Guide SG Packetr 103 (IPE Packetr in this example) Obtains Service Guide Transfer Descriptor SGDD and Service Guide Transfer Unit SGDU from Service Configuration System 104, and Transports Descriptor SGDD and Service Guide Transfer Unit The SGDU performs packing; the MPEG2-TS multiplexing module 105 obtains the service guide transmission descriptor SGDD and the service guide transmission unit SGDU from the service guide SG packetizer 103, and transmits the video stream audio stream, the service guide transmission descriptor SGDD, and the service to the video stream video K The guide transmission unit SGDU performs MPEG2-TS multiplexing; the digital television terrestrial broadcast transmission system broadcast network 200 broadcasts these data multiplexed into the MPEG2-TS transport stream. The service guide SG can be acquired and used in the digital television terrestrial broadcast transmission system broadcast terminal 300 shown in FIG. 7 in accordance with the flow shown in FIG. 9 (assuming that the terminal is set to receive the service guide SG in IP mode). The following is an example of obtaining a program stream programl through the service guide SG as an example:

(1) Service Guide SG Module 305 Control The MPEG2-TS Demultiplexing Module 301 first checks whether the bootstrap session of IP 224.0.23.14 or IPv6 FF0X:0:0:0:0:0:0: 12D port 9214 exists. Since the broadcast headend does not use the Service Guide SG Bootstrapping Session in this example, the Service Guide SG Module 305 continues to check for well-known announcement sessions.

(2) The service guide SG module 305 controls the MPEG2-TS demultiplexing module 301 to obtain an IP flow with an IP address of 224.0.13.365 and a port number of 4090 (ie, an advertisement session of the service guide SG); a SG unpacker (this example is an IP) The unpacking machine performs IP unpacking on the IP stream to obtain a service guide transmission descriptor SGDD transmitted by the IP address and port number;

(3) The service guide SG module 305 extracts the transmission parameter about the service guide transmission unit SGDU transmission session from the service guide transmission descriptor SGDD file, that is, the child element Transport of the sub-element DescriptorEntry of the element ServiceGuideDeliveryDescriptor of the element of the service guide transmission descriptor SGDD (See Table 6) Obtain the following parameters: ipAddress = 232.0.2.51;

Port = 5010

The SG IP unpacker 304 obtains the data transmitted in the IP stream from the MPEG2-TS demultiplexing module 302, which is the service guide transmission unit SGDU;

Service Guide SG Module 305 Obtaining the Service Guide from the Service Guide SG IP Unpacker 304 The Transmission Unit SGDU;

(4) Service Guide SG Module 305 parses the Service Guide Transfer Unit SGDU, and obtains the complete data of the Service Guide SG;

(5) The service guide SG module 305 parses the service guide SG, which includes the transmission parameter of the video stream video l of the program stream program1, that is, the video stream videol in the access information Access fragment of the service guide SG for the program stream programl Elements The parameters described by DMBBroadcastPara, ie

onID = 0x02;

tsID = 0x04;

MediaType = 0x01020000 (ie MPEG2 video);

ProtocolType = 15 (ie PES stream);

ServiceComponentID = 0x1000 (ie PID = 0x1000);

And the parameter described in the DMBBroadcastPara element of the audio stream audiol in the access information Access fragment of the service guide SG for the program stream programl, ie onID = 0x02;

tsID = 0x04;

MediaType = 0x01040000 (ie MPEG2 audio);

ProtocolType = 15 (艮卩 PES stream);

ServiceComponentID = 0x2000 (艮 P PID = 0x2000 ) ;

(6) When the application module 306 wishes to obtain the program stream program1, it first obtains the transmission parameters of the video stream video1 and the audio stream audio1 from the service guide SG module 305; and then from the MPEG2- according to the transmission parameters of the video stream video1 and the audio stream audiol. The corresponding data, that is, the audio and video stream of the program stream program1, will be obtained in the TS transport stream.

The following embodiments are transmitted in a completely non-IP manner, that is, the service guide SG transmits through the data pipe Data Piping mode or the data carousel DSM-CC DC or the object carousel DSM-CC OC mode, and the audio and video streams are transmitted through the PES stream mode. The emergency broadcast data is transmitted through the data pipe Data Piping (optionally, the data carousel DSM-CC DC or the object carousel DSM-CC OC mode).

(1) It is assumed that the audiovisual stream and the data stream transmitted by the broadcast head end 100 of the digital television terrestrial broadcast transmission system include one emergency broadcast data data and one program stream programl (composed of the video stream videol and the audio stream audiol).

The emergency broadcast data is configured and transmitted in the MPEG2-TS transmission channel with the following parameters: The emergency broadcast data data originally belongs to the network with the identifier value 0x02; it is transmitted in the transport stream with the identifier 0x04; its media type is private data; the protocol type of the transport is Data Pipe Data Pipe (optionally, it can also be data) Carousel DSM-CC DC or Object Carousel DSM-CC OC mode); it is identified in the MPEG2-TS transport stream by a packet identification value PID of 0x5000. The video stream videol is configured and transmitted in the MPEG2-TS transmission channel with the following parameters:

The video stream videol originally belongs to the network with the identity value 0x02; it is transmitted in the transport stream with the identifier 0x04; its media type is MPEG-2 video; the protocol type of the transmission is

PES stream; it is identified in the MPEG2-TS transport stream by a packet identification value PID of 0x1000; audio stream audiol is configured and transmitted in the MPEG2-TS transport channel with the following parameters:

(2) The service configuration system 104 generates a service guide transmission unit SGDU, and describes the above transmission parameters in the service guide transmission unit SGDU for the element DMBBroadcastPara of the video stream video1 of the program stream program1 and the element DMBBroadcastPara of the audio stream audiol. For example, in the access information access fragment of the program stream program1, the element of the Access element, a sub-element of the PrivateExt, DMBBroadcastPara, describes the transmission parameters of the video stream videol, namely:

onID = 0x02 _; (refer to the definition in Table 10, the same below)

tsID = 0x04;

MediaType = 0x01020000;

ProtocolType = 15 ; ServiceComponentID = 0x1000;

And in the access information for the program stream program1 access element, the element of the Access element, another sub-element of the PrivateExt, DMBBroadcastPara, describes the transmission parameter of the above audio stream audiol, BP:

onID = 0x02 _; (refer to the definition in Table 10, the same below)

tsID = 0x04;

MediaType = 0x01040000;

ProtocolType = 15;

ServiceComponentID = 0x2000; The service configuration system 104 configures the transmission parameters of the service guide transmission unit SGDU: The service guide transmission unit SGDU is transmitted through the data pipe Data Piping mode, which initially belongs to the network with the identifier value 0x02; it is in the transport stream identified as 0x04 Transmission; it is identified in the MPEG2-TS transport stream by a packet identification value PID having a value of 0x6000;

(3) The service configuration system 104 generates a service guide transmission descriptor SGDD and describes the above transmission parameters in the element DMBTransport portion (see Table 12) describing the service guide transmission unit SGDU transmission mode in the service guide transmission descriptor SGDD. For example, in the Business Guide Transfer descriptor SGDD element ChildGuideDeliveryDescriptor child element

The above transmission parameters are described in the sub-element DMBTransport of DescriptorEntry, namely: onID = 0x02 _; (refer to the definition in Table 12, the same below)

tsID = 0x04;

MediaType = 0x02000000; ( SGDU )

ProtocolType = 16;

ServiceComponentID = 0x6000 The Service Configuration System 104 also describes the above transmission parameters in the Service Guide Transfer Descriptor SGDD for the element DMBBroadcastDelivery portion of the Emergency Broadcast Transport Path. For example, in the Service Guide SG, the element of the descriptor is conveyed by ServiceGuideDeliveryDescriptor. The above transfer parameters are described in the child element DMBBroadcastDelivery (see Table 11) of the child element NotificationReception, namely:

onID = 0x02; (refer to the definition in Table 11, the same below)

tsID = 0x04;

MediaType = 0x01050000; (ie private data)

ProtocolType = 16 (16 when using the data pipe Data Pipe; 17 or 18 when using the data carousel DSM-CC DC or the object carousel DSM-CC OC mode);

ServiceComponentID = 0x5000 Service Configuration System 104 Configuration Service Guide Transfer Descriptor SGDD's Transmission Parameters (ie, Well-known Announcement Session Parameters): It originally belongs to the network with the identity value 0x02; it is transmitted in the transport stream identified as 0x04; it is in MPEG2- The TS transport stream is identified by a packet identification value PID having a value of 0x4000. Optionally, when the service guide advertisement session parameter is transmitted using a well-known bootstrapping session of the service guide (eg, onID = 0x02; tsID = 0x04; ServiceComponentID = 0x3000), the service configuration system 104 generates the service guide access descriptor SGAD and is in the service. The above mentioned transmission parameters are described in the Guide Access Descriptor SGAD section describing the Service Guide Announcement Session Transfer Parameters. For example, the above transmission parameters are described in the element SGEntry (see Table 13) of the Service Guide Access Descriptor SGAD, 艮

protocolType = 1;

onID = 0x02;

tsID = 0x04;

ServiceComponentID = 0x4000

(4) Service Guide The SG Packetr 103 obtains the Service Guide Transfer Descriptor SGDD and the Service Guide Transfer Unit SGDU from the Service Configuration System 104, and the Service Guide Access Descriptor SGAD (if any), and transmits the Descriptor SGDD and Service to the Service Guide. The guide transfer unit SGDU and the service guide access descriptor SGAD (if any) are packaged; the MPEG2-TS multiplexing module 105 obtains the service guide transfer from the service guide SG packer 103. Descriptor SGDD and Service Guide Transfer Unit SGDU and Service Guide Access Descriptor SGAD (if any), and for emergency broadcast data, video stream videol, audio stream audiol, service guide transport descriptor SGDD and service guide transport unit SGDU, and service guide The access descriptor SGAD (if any) performs MPEG2-TS multiplexing; the digital television terrestrial broadcast transmission system broadcast network 200 broadcasts these data multiplexed into the MPEG2-TS transport stream. The service guide SG can be acquired and used in the digital television terrestrial broadcast transmission system broadcast terminal 300 shown in FIG. 7 in accordance with the flow shown in FIG. 9 (assuming that the terminal is set to receive the service guide SG in a non-IP manner). The following is an example of obtaining a program stream program 1 through the service guide SG as an example:

(1) The service guide SG module 305 controls the MPEG2-TS demultiplexing module 301 to first check the bootstrap session (for example, the parameters are: onlD = 0x02; tsID = 0x04; ServiceComponentID = 0x3000 data pipe Data Piping well-known session; optionally, For example, the parameters are: onlD = 0x02; tsID = 0x04; ServiceComponentID =

0x3000 data carousel DSM-CC DC or object carousel DSM-CC OC well-known session) Existence. Assume that in this example, the broadcast headend uses the well-known bootstrapping session of the service guide SG, and the service guide SG module 305 controls the MPEG2-TS demultiplexing module 301 to obtain the parameter as onDD =

0x02; tsID = 0x04; ServiceComponentID = 0x3000 data stream (ie, the bootstrapping session of the service guide SG).

The SG depacketizer 304 unpacks the data stream to obtain a service guide access descriptor SGAD transmitted through the data stream; the service guide SG module 305 parses the service access descriptor

SGAD, and extract the transmission parameters of the service guide SG advertisement session from the service guide access descriptor SGAD file, that is, obtain the following parameters from the element SGEntry of the service guide access descriptor SGAD:

ProtocolType = 1;

onlD = 0x02; tsID = 0x04;

ServiceComponentID = 0x4000 Optionally, when the broadcast terminal is set to obtain the service guide transfer descriptor SGDD directly from the well-known advertisement session of the service guide SG (for example, onID = 0x02; tsID - 0x04; ServiceComponentID = 0x4000), this step (1) Can be omitted, and get the business guide SG directly from step (2).

(2) Service Guide SG Module 305 Controls the MPEG2-TS Demultiplexing Module 301 to obtain a data stream with parameters onID = 0x02; tsID = 0x04; ServiceComponentID = 0x4000 (ie, the advertising session of the Service Guide SG).

The SG unpacker unpacks the data stream to obtain a service guide transmission descriptor SGDD transmitted through the data stream;

(3) The service guide SG module 305 parses the service guide transmission descriptor SGDD, and extracts the transmission parameters regarding the emergency broadcast from the service guide transmission descriptor SGDD file, that is, the sub-element DMBBroadcastDelivery of the element of the ServiceGuideDeliveryDescriptor that transmits the descriptor from the service guide SG. Get the following parameters:

onID = 0x02; (refer to the definition in Table 11, the same below)

tsID = 0x04;

MediaType = 0x01050000; (ie private data)

ProtocolType = 16 (16 when the data pipe Data Pipe is used; 17 or 18 when using the data carousel DSM-CC DC or the object carousel DSM-CC OC mode);

ServiceComponentID = 0x5000 Service Guide SG Module 305 extracts the transmission parameters for the Service Guide Transfer Unit SGDU Transport Session from the Service Guide Transfer Descriptor SGDD file, ie the sub-element DMBTransport of the sub-element DescriptorEntry of the element ServiceGuideDeliveryDescriptor of the Service Delivery Descriptor SGDD (See Table 12) Obtain the following parameters: onID = 0x02; (refer to the definition in Table 12, the same below)

tsID - 0x04 _;

MediaType = 0x02000000; ( SGDU)

ProtocolType = 16;

ServiceComponentID = 0x6000 Optionally, when the Service Guide Transport Unit SGDU is transmitted by Data Carousel DSM-CC DC or Object Carousel DSM-CC OC, the following parameters are obtained from the sub-element DMBTransport (see Table 12):

onID = 0x02; (refer to the definition in Table 12, the same below)

tsID = 0x04;

MediaType = 0x02000000;

ProtocolType = 17 (or 18);

ServiceComponentID = 0x6000 Service Guide The SG unpacker 304 obtains the data transmitted in the above data stream from the MPEG2-TS demultiplexing module 302, which is the service guide transmission unit SGDU;

(4) Service Guide SG Module 305 Parsing Service Guide Transfer Unit SGDU, get the complete data of the Service Guide SG;

(5) The service guide SG module 305 parses the service guide SG, which includes the transmission parameter of the video stream video1 of the program stream program1, that is, the video stream video1 in the access information Access fragment of the service guide program SG for the program stream programl The parameter described by the element DMBBroadcastPara, 艮口

onID = 0x02;

tsID = 0x04;

MediaType = 0x01020000 (ie MPEG2 video);

ProtocolType = 15 (艮卩 PES stream);

ServiceComponentID = 0x1000 (艮卩PID = 0x1000); And the parameter described in the access information Access slice of the program guide SG for the program stream program1 regarding the element DMBBroadcastPara of the audio stream audio, ie onID = 0x02;

tsID = 0x04;

MediaType = 0x01040000 (S卩 MPEG2 audio);

ProtocolType = 15 (ie PES stream);

ServiceComponentID = 0x2000 (艮卩 PID = 0x2000);

(6) When the application module 306 wishes to obtain the program stream program1, it first obtains the transmission parameters of the video stream video1 and the audio stream audio1 from the service guide SG module 305; and then from the MPEG2- according to the transmission parameters of the video stream video1 and the audio stream audiol The corresponding data, that is, the audio and video stream of the program stream program1, will be obtained in the TS transport stream. When the application module 306 wishes to obtain the emergency broadcast data data, it first obtains the transmission parameter of the emergency broadcast data data from the service guide SG module 305; and then obtains the corresponding data from the MPEG2-TS transport stream according to the transmission parameter of the emergency broadcast data data. Data, that is, emergency broadcast data data. The above embodiment only exemplarily describes a part of the application of the service guide SG in the digital television terrestrial broadcast transmission system. In practical applications, the Service Guide SG can also guide and index both IP-based and non-IP-based data transmissions. For example, the guidance and indexing of IP-based data transmission can be described in Table 2 (such as the attributes and sub-elements in the child element SessionDescriptionReference of the sub-element BroadcastServiceDelivery of the sub-element AccessType of the access element of the Access information Access fragment). At the same time, the guidance and indexing of non-IP based data transmission can be described in Table 10 (such as using the attributes and sub-elements in the child element PrivateExt of the Access element in the access information Access fragment). In practical applications, the transmission of the service guide SG itself and the transmission of emergency broadcast data can be flexibly selected according to actual needs, whether to transmit through IP-based or non-IP-based. For example, the IP-based transmission service guide SG and tight The urgent broadcast data can be in the manner described in Table 6 (such as the attributes and sub-elements in the sub-element Transport of the sub-element DescriptorEntry of the element ServiceGuideDeliveryDescriptor of the service guide transfer descriptor SGDD, and the element ServiceGuideDeliveryDescriptor of the service descriptor transfer descriptor SGDD Sub-element NotificationReception element IPBroadcastDelivery attributes and sub-elements); Transport service guide for various non-IP based methods (eg via Data Piping Data Piping, Data Carousel DSM-CC DC or Object Carousel DSM-CC OC) The SG and emergency broadcast data may be in the manner described in Table 12 and Table 11 (such as the attributes and sub-elements in the sub-element DMBTransport of the sub-element DescriptorEntry of the element ServiceGuideDeliveryDescriptor of the service guide transfer descriptor SGDD, and the transport guide using the service guide The elements of the SGDD element ServiceGuideDeliveryDescriptor are the elements of the NotificationReception element of the DMBBroadcastDelivery and the child elements). It will be apparent to those skilled in the art that various modifications and changes can be made in the present invention without departing from the spirit and scope of the invention. Therefore, it is intended that the present invention cover the modifications and modifications of the invention

Claims

Claim

1. A method of applying a service guide in a digital television terrestrial broadcast transmission system, comprising the steps of:

a) generating a service guide SG in the digital television terrestrial broadcast transmission system, and a service guide transmission unit SGDU and a service guide transmission descriptor SGDD related to the service guide SG;

b) describing and configuring SGDD and SGDU based on the transmission of each audio and video stream and data stream in a digital television terrestrial broadcast transmission system;

c) transmitting audio and video streams, data streams, SGDUs and SGDDs in the network channel of the digital television terrestrial broadcast transmission system.

2. The method according to claim 1, wherein said step of generating an SG comprises adding an element DMBBroadcastPara to the access information Access fragment data definition of the SG for describing a broadcast network parameter of the digital television terrestrial broadcast transmission system.

3. The method according to claim 2, wherein said element DMBBroadcastPara is added as a child element to a child element PrivateExt of the element Access in the access information Access fragment.

4. The method of claim 3, wherein said element DMBBroadcastPara includes the following attribute fields:

An attribute onID describing the original network ID where the service component is located;

An attribute tsID describing the transport stream ID where the service component is located;

The attribute used to describe the type of the business component MediaType; and

The attribute ProtocolType used to describe the protocol type used by the digital television terrestrial broadcast transmission system to transmit audio and video streams and data streams.

5. The method according to claim 4, wherein said element DMBBroadcastPara further comprises a sub-element ServiceComponentID for describing a packet identifier PID of the service component.

6. The method of claim 4, wherein the attribute MediaType comprises: MPEG-1 video, MPEG-2 video, MPEG-1 audio, MPEG-2 audio, private data, packed elementary stream PES, MHEG, DSM-CC And ITU-T H.222.

7. The method of claim 1 wherein said step of generating an SGDD comprises adding an element DMBBroadcastDelivery to the SGDD for providing channel parameters for receiving an emergency broadcast notification message in the broadcast channel.

8. The method of claim 7, wherein the element DMBBroadcastDelivery is added as a child element to a child element of the Service Guide SG transport descriptor, ServiceGuideDeliveryDescriptor, NotificationReception.

9. The method of claim 8 wherein said element DMBBroadcastDelivery includes the following attribute fields:

10. The method of claim 9 wherein said element DMBBroadcastDelivery further comprises a sub-element ServiceComponentID for describing a packet identifier PID of the emergency broadcast notification message.

11. The method of claim 7, wherein the step of generating the SGDD further comprises adding to the SGDD an element DMBTransport for describing a transport session in which the SGDU described in the Service Guide SG Transport Descriptor Entry is located.

12. The method according to claim 11, wherein said element DABTransport is The child element is added to the child Element DescriptorEntry of the element ServiceGuideDeliveryDescriptor of the Service Guide SG Transport Descriptor.

13. The method of claim 12, wherein the sub-element DMBTransport includes the following attribute fields:

14. The method of claim 13 wherein said element DMBBroadcastDelivery further comprises a sub-element ServiceComponentID for describing a packet identifier PID of the SGDU transport session.

15. A method according to claim 9 or 14, wherein the attribute MediaType comprises: MPEG-1 video, MPEG-2 video, MPEG-1 audio, MPEG-2 audio, private data, packed elementary stream PES, MHEG, DSM -CC and ITU-T H.222.

The method of claim 1, wherein the step of generating a service guide access descriptor SGAD is further included in the digital television terrestrial broadcast transmission system for supporting a description of the service guide advertisement session transmitted by the non-IP mode.

17. The method of claim 16 wherein said step of generating an SGAD comprises adding the following attribute parameters to the SGEntry element of the SGAD:

Attribute protocolType: The protocol type used by the session;

Attribute onID: the original network ID where the session is located;

Attribute tsID: the transport stream ID where the session is located;

Attribute ServiceComponentID: The PID of the SGDD transport session.

18. The method according to claim 17, wherein a field value of the attribute protocolType is 0 indicating that the service guide SG transmits by means of IP; 1 indicates that the service guide SG is transmitted by the data pipe Data Pipe; and (2) indicates that the service guide is transmitted by the DSM-CC DC mode. 3 indicates that the service guide SG is transmitted through the DSM-CC OC mode; the remaining values are reserved.

19. A broadcast headend for applying a service guide in a digital television terrestrial broadcast transmission system, the broadcast headend comprising an MPEG2-TS multiplexer, and further comprising:

a service configuration system, in which a service guide SG, a service guide transmission unit SGDU and a service guide transmission descriptor SGDD related to the service guide SG are generated in a digital television terrestrial broadcast transmission system, and the digital television terrestrial broadcast transmission is based on each audio and video stream and data stream. The transmission conditions in the system describe and configure SGDD and SGDU, as well as the transmission of audio and video streams, data streams, SGDUs and SGDDs over the network of digital television terrestrial broadcast transmission systems.

The broadcast headend of claim 19, wherein said broadcast headend further comprises: an SG packetizer for packing the SGDD and the SGDU, and then outputting the SGDD and SGDU packed data to the MPEG2-TS multiplexer.

21. The broadcast headend of claim 19, wherein said MPEG2-TS multiplexer multiplexes SGDD and SGDU with respective audio and video streams and data streams into a broadcast network of a digital television terrestrial broadcast transmission system.

22. The broadcast headend of claim 19, wherein the service configuration system generates a service guide SG comprising adding an element DMBBroadcastPara to the access information Access fragmentation data definition of the SG for describing a broadcast network parameter of the digital television terrestrial broadcast transmission system. .

23. The broadcast headend of claim 22, wherein the element DMBBroadcastPara is added as a child element to a child element PrivateExt of the element Access in the access information Access fragment.

24. The broadcast headend of claim 23, wherein said element DMBBroadcastPara includes the following attribute fields:

25. The broadcast headend of claim 23, wherein said element DMBBroadcastPara further comprises a child element of a packet identifier PID for describing a service component

ServiceComponentID.

26. The broadcast headend of claim 23, wherein the service configuration system generating the SGDD comprises adding an element DMBBroadcastDelivery to the SGDD for providing channel parameters for receiving an emergency broadcast notification message in the broadcast channel.

27. The broadcast headend of claim 26, wherein said element DMBBroadcastDelivery is added as a child element to a child element NotificationReception of the element ServiceGuideDeliveryDescriptor of the service guide SG transport descriptor.

28. The broadcast headend of claim 27, wherein said element DMBBroadcastDelivery includes the following attribute fields:

29. The broadcast headend of claim 28, wherein said element DMBBroadcastDelivery further comprises a sub-package PID for describing a service component. Element ServiceComponentID ₀

30. The broadcast headend of claim 26, wherein said service configuration system generating SGDD further comprises adding an element DMBTransport to the SGDD for describing a transport session in which the SGDU described in the service guide SG transport descriptor entry is located.

31. The broadcast headend of claim 30, wherein the element DABTransport is added as a child element to a child element DescriptorEntry of the element ServiceGuideDeliveryDescriptor of the service guide SG transport descriptor.

32. The broadcast headend of claim 31, wherein said sub-element DMBTransport comprises an attribute field - an attribute onID for describing an original network ID in which the service component is located;

33. The broadcast headend of claim 32, wherein said element DMBBroadcastDelivery further comprises a packet identifier for describing an SGDU transport session

The child element of the PID ServiceComponentID.

34. The broadcast headend of claim 28 or 33, wherein the attribute MediaType comprises: MPEG-1 video, MPEG-2 video, MPEG-1 audio, MPEG-2 audio, private data, packed elementary stream PES, MHEG , DSM-CC and ITU-T H.222.

35. The broadcast headend of claim 19, wherein said service configuration system in a digital television terrestrial broadcast transmission system further comprises generating a service guide access descriptor SGAD for supporting a traffic guidance announcement session over a non-IP manner description of.

36. The broadcast headend of claim 35, wherein the service configuration system generating the SGAD comprises adding the following attribute parameters to the SGEntry element of the SGAD:

Attribute protocolType: The protocol type used by the session;

Attribute onID: the original network ID where the session is located;

Attribute tsID: the transport stream ID where the session is located;

Attribute ServiceComponentID: The PID of the SGDD transport session.

37. The broadcast headend according to claim 36, wherein a field value of the attribute protocolType is 0 indicating that the service guide SG transmits by means of IP; 1 indicates that the service guide SG is transmitted by the data pipe Data Pipe; and (2) indicates that the service guide SG passes the DSM-CC DC mode transmission; 3 indicates that the service guide SG transmits by DSM-CC OC mode; the remaining values are reserved.

38. A broadcast terminal for applying a service guide in a digital television terrestrial broadcast transmission system, the broadcast terminal comprising an MPEG2-TS demultiplexing module, and further comprising:

SG unpacking machine for obtaining service guide SG information from the MPEG2-TS demultiplexing module;

The service guide SG module obtains SGDD data from the MPEG2-TS demultiplexing module and the SG unpacker, parses the SGDD data, obtains transmission information of the SGDU, and extracts information from the MPEG2-TS demultiplexing module and the SG unpacking machine according to the SGDU transmission information. The SGDU data is obtained, the SGDU data is parsed, the transmission information of each audio and video stream and the data stream in the MPEG2-TS transport stream is obtained, and then output to the application module.

39. The broadcast terminal according to claim 38, wherein the service guide SG module parses the parameters described in the service guide SG for the element DMBBroadcastPara in the access fragment of the audio/video stream or the data stream.

40. The broadcast terminal according to claim 39, wherein said element DMBBroadcastPara includes the following attribute fields:

An attribute tsID for describing the transport stream ID where the service component is located; An attribute MediaType for describing a type of a service component; and an attribute ProtocolType for describing a protocol type used by the digital television terrestrial broadcast transmission system to transmit audio and video streams and data streams.

41. The broadcast terminal according to claim 39, wherein said element

DMBBroadcastPara also contains a sub-element ServiceComponentID that describes the packet identifier PID of the service component.

42. The broadcast terminal of claim 38, wherein the service guide SG module extracts the element DMBBroadcastDelivery from the SGDD file for providing channel parameters for receiving the emergency broadcast notification message in the broadcast channel.

43. The broadcast terminal according to claim 42, wherein said element DMBBroadcastDelivery includes the following attribute fields:

44. The broadcast terminal according to claim 43, wherein said element DMBBroadcastDelivery further comprises a sub-element ServiceComponentID for describing a packet identifier PID of the service component.

45. The broadcast terminal according to claim 38, wherein said service guide SG module is from

The element DMBTransport of the transport session in which the SGDU described in the SG Transport Descriptor Entry described in this Service Guide SG Transport Descriptor Entry is extracted is extracted from the SGDD file.

46. The broadcast terminal according to claim 45, wherein said sub-element DMBTransport includes the following attribute field - An attribute onID used to describe the original network ID where the service component is located;

The attribute tsID used to describe the transport stream ID where the service component is located;

47. The broadcast terminal of claim 45, wherein said element DMBBroadcastDelivery further comprises a sub-element ServiceComponentID for describing a packet identifier PID of the SGDU transport session.

48. The broadcast terminal according to claim 38, wherein said service guide SG module in the digital television terrestrial broadcast transmission system further extracts a service guide access descriptor SGAD for supporting a service guide advertisement session transmitted by a non-IP method description.

49. The broadcast terminal according to claim 38, wherein said service guide access descriptor SGAD includes the following attribute parameters:

Attribute protocolType: The protocol type used by the session;

Attribute onID: the original network ID where the session is located;

Attribute tsID: the transport stream ID where the session is located;

Attribute ServiceComponentID: The PID of the SGDD transport session.

50. The broadcast terminal according to claim 38, wherein a field value of the attribute protocolType is 0 indicating that the service guide SG transmits by means of IP; 1 indicates that the service guide SG is transmitted by the data pipe Data Pipe; and 2 indicates that the service guide SG passes the DSM-CC DC Mode transmission; 3 indicates that the service guide SG transmits by DSM-CC OC mode; the remaining values are reserved.