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GB/T 38828-2020: Technical requirements for IPTV media delivery system--Use cases and requirements
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Technical requirements for IPTV media delivery system--Use cases and requirements
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GB/T 38828-2020
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Basic data | Standard ID | GB/T 38828-2020 (GB/T38828-2020) | | Description (Translated English) | Technical requirements for IPTV media delivery system--Use cases and requirements | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | M32 | | Classification of International Standard | 33.160.60 | | Word Count Estimation | 10,120 | | Date of Issue | 2020-06-02 | | Date of Implementation | 2020-12-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 38828-2020: Technical requirements for IPTV media delivery system--Use cases and requirements
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Technical requirements for IPTV media delivery system--Use cases and requirements
ICS 33.160.60
M32
National Standards of People's Republic of China
Technical requirements for IPTV media delivery system
Scenarios and needs
2020-06-02 released
2020-12-01 implementation
State Administration for Market Regulation
Issued by the National Standardization Management Committee
Table of contents
Foreword Ⅰ
1 Scope 1
2 Normative references 1
3 Terms and definitions, abbreviations 1
3.1 Terms and definitions 1
3.2 Abbreviations 2
4 Hierarchical structure of IPTV media delivery system 2
5 IPTV media delivery system application scenario 3
5.1 IPTV media distribution and delivery application scenario 3
5.2 Capability or resource service application scenario 4
6 Demand for IPTV media delivery system 4
6.1 Requirements of service providers for media delivery systems 4
6.2 End-user needs for media delivery system 5
6.3 Requirements for media delivery system functions 5
6.4 Requirements for information processing functions of media delivery systems 6
6.5 Demand for media content types provided by media delivery systems 6
6.6 Requirements for media delivery methods of media delivery systems 6
6.7 Demand for media delivery system management 6
Foreword
This standard is one of the "Technical Requirements for IPTV Media Delivery System" series of standards. The name and structure of this series of standards are as follows.
---GB/T 38828 IPTV media delivery system technical requirements scenarios and requirements;
---GB/T 38827 IPTV media delivery system technical requirements system architecture;
---GB/T 38826 IPTV media delivery system technical requirements overall requirements;
---GB/T 38829 IPTV media delivery system technical requirements for content access;
---GB/T 38830 IPTV media delivery system technical requirements for global load balancing subsystem;
---GB/T 38831 IPTV media delivery system technical requirements media distribution storage subsystem;
---GB/T 38754 IPTV media delivery system technical requirements for streaming media services.
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
Please note that certain contents of this document may involve patents. The issuing agency of this document is not responsible for identifying these patents.
This standard was proposed by the Ministry of Industry and Information Technology of the People's Republic of China.
This standard is under the jurisdiction of the National Communication Standardization Technical Committee (SAC/TC485).
Drafting organizations of this standard. China Academy of Information and Communications Technology, China Telecom Corporation, ZTE Corporation, Huawei Technologies
Co., Ltd., China United Network Communications Group Co., Ltd., China Mobile Communications Corporation, Oriental Pearl New Media Co., Ltd., Shanghai
Hai Nokia Bell Co., Ltd.
The main drafters of this standard. Nie Xiuying, Chen Ge, Tang Hong, Liang Jie, Miao Chuanyang, Song Haibin, George, Ni Wei, Liu Yuhan, Zhang Lijie, Gu Fangfang.
Technical requirements for IPTV media delivery system
Scenarios and needs
1 Scope
This standard specifies the application scenarios and requirements of the IPTV media delivery system, mainly including the hierarchical structure of the media delivery system, media delivery
Payment system application scenario description and requirements for media delivery system.
This standard applies to IPTV media delivery systems.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
YD/T 1654-2007 IPTV service requirements
YD/T 1823-2008 IPTV service system overall technical requirements
3 Terms and definitions, abbreviations
3.1 Terms and definitions
The following terms and definitions apply to this document.
3.1.1
Time-shifttelevision
Perform short pause, rewind and fast forward operations on the broadcast and TV content channels played in real time.
3.1.2
Electronicprogramguide
The list of digital TV programs combined according to different classification rules is provided to users electronically.
Note. The user can view it through the remote control, or directly switch from the electronic program list to the program being played.
3.1.3
Push
According to the requirements of the service provider, the media content is packaged and delivered to the system intermediate node or the service or operation of multiple terminal users.
3.1.4
Serviceprovider
Operators that provide telecommunications services to consumers and other clients in accordance with price lists or contracts.
Note. The service provider may or may not operate the network, and may or may not be a customer of another service provider.
3.1.5
Delivery
Send content to end users.
3.1.6
Distribution
Send the content to the appropriate intermediate location for subsequent delivery.
3.2 Abbreviations
The following abbreviations apply to this document.
ARQ. Automatic Repeat Request (AutomaticRepeatRequest)
EPG. Electronic Program Guide (ElectronicProgramGuide)
FCC. Fast Channel Change Service (FastChannelChange)
FEC. Forward error correction (Forwarderrorcorrection)
IP. Internet Protocol (InternetProtocol)
IPTV. Internet Protocol Television (InternetProtocolTelevision)
QoE. Quality of Experience (Quality of Experience)
QoS. Quality of Service (Quality of Service)
4 Hierarchical structure of IPTV media delivery system
The IPTV media delivery system is an important part of the IPTV service system. It mainly completes the integration of IPTV service/application providers, internal
The media content provided by the content owner is provided to end users or relatives according to the needs of users or the needs of service/application providers and media content owners.
Equipment distribution or delivery to improve the speed and quality of media delivery.
The hierarchical structure of the IPTV media delivery system is shown in Figure 1.
among them.
a) Content management. complete content processing, control and management functions;
b) Content distribution and delivery. complete functions such as publishing, searching, storing and transmitting content;
c) Intelligent network services. complete functions such as multicast, security, authentication and service quality assurance;
d) Edge network. complete hardware cache or software cache, and deliver media information to users and other functions;
e) End users. Users who use the services provided by the media delivery system can use smartphones, computers or set-top boxes.
Video machine etc.
5 Application Scenarios of IPTV Media Delivery System
5.1 IPTV media distribution and delivery application scenarios
5.1.1 Application scenarios of static content delivery services such as EPG browsing, media content download, audio and video on demand, etc.
When IPTV service providers provide services, for the convenience of end users, they usually provide EPG browsing services for end users to choose.
Refer to use before selecting IPTV program content. Audio and video on-demand services are one of the most popular IPTV services by end users.
Widely distributed and large number of end-user groups, and some end-users, according to their own preferences, hope to download some media content to the end-use
The user’s client is for you to use at your convenience. If some of the above IPTV services are provided through only one IPTV content source
It is bound to cause huge pressure on the bearer network and the source of IPTV content. In this application scenario, the IPTV media delivery system
The static content (all or part) in the source service is distributed in advance to the edge service deployed close to the user's access end, and the user requests it accordingly.
When content, the content routing system in the IPTV media delivery system redirects the requesting user to the corresponding edge service according to the corresponding strategy
On the server, the edge server provides users with the requested content to reduce the pressure on the backbone network and the transmission delay of the content on the network.
Improve the user's quality of experience. When the content requested by the user is not stored or cached in the edge server, the edge server will send it to its superior or source
The server provides services to the user after requesting the corresponding content.
This application scenario is suitable for browsing EPG content such as pictures, text, animation, audio and video, as well as audio and video such as movies, TV, music, and songs.
Browse, download and on-demand services of video content.
5.1.2 Application Scenarios of Audio and Video Live Service
Providing audio and video programs to end users in a live broadcast mode is the closest way to radio and television that users are accustomed to and favorite.
One of the important applications provided by IPTV services. When the live broadcast method is used to provide services on an IP-based network, the internal capacity is large (such as video
Program content), the large number of received users, and the scattered distribution will cause huge traffic to the IP backbone network, and bring huge traffic to the IP backbone transmission.
Great pressure. In this application scenario, the IPTV media delivery system first distributes the live content of the live source to unicast or multicast
Edge server, and then the edge server multicasts corresponding live content to users requesting live content to reduce the traffic of the network and live source
And visit pressure, and improve the quality of user service experience.
This application scenario is suitable for but not limited to services such as movie or music playback, live broadcast and advertisement delivery, and live text content distribution.
5.1.3 Service application scenarios of virtual private IPTV media delivery system
Some IPTV content providers or enterprises usually need to adopt an IPTV media delivery system based on their business characteristics and development needs.
System, to achieve content distribution within a specific geographic area. At the same time, it is hoped that the IPTV media delivery system used can be managed and managed by itself.
Control is like a self-built IPTV media delivery system, but you don’t want to invest resources to build an IPTV media that will only be used for a period of time.
Body delivery system. In this application scenario, the owner of the IPTV media delivery system can use their own IPTV media with sufficient resources
According to the actual needs of customers, the delivery system divides several independent virtual IPTV media delivery systems to provide customer services to meet
Customers need to manage and use IPTV media delivery system by themselves.
5.1.4 Application scenarios of content distribution services across different networks
Some IPTV content providers connect their content sources to only a certain type of network (fixed network or mobile network), but hope that they provide
The content provides services to users of different types of networks. In this application scenario, the IPTV media delivery system
The body delivery system infrastructure is built across multiple types of networks to provide content providers to content providers.
Send to different operator networks and different types of network users.
5.2 Capability or resource service application scenarios
5.2.1 Application scenarios of data processing services
With the continuous development of data processing technology and the data processing capabilities of equipment, the content used by users is usually in a variety of encoding formats, graphics
The film format and file format exist. When using different facilities to use these contents, due to the decoding capabilities and display capabilities of the corresponding equipment
The content format of the service to be provided needs to be converted. When there is a large amount of content that needs to be formatted, the conversion frequency is similar.
For smaller cases, if the IPTV content provider itself performs the corresponding work, it needs to spend a lot of money to purchase the corresponding equipment to
Completion makes the cost of corresponding data processing higher. If the data processing capability of the IPTV media delivery system is used as content
The owner or content provider completes the above-mentioned format conversion and other tasks, which can save users the cost of purchasing the corresponding equipment. In this application scenario,
The IPTV media delivery system uses its own redundant data processing capabilities to provide users with corresponding data processing services.
This application scenario includes but is not limited to audio and video content transcoding services, image format conversion services, content hot update services, and small files
Aggregation services, etc.
5.2.2 Application Scenarios of Statistics Service
IPTV content providers need to understand the usage of their various resources. For example, within a certain period of time, the content they provide is accessed by users.
Ask the overall situation, access to specific content and statistical information such as the area covered by users accessing its content. Should be
In the application scenario, the IPTV media delivery system uses the user information collected when the user accesses the content information provided by the corresponding content provider.
Log information such as the accessed content and the address information of the accessing user, according to the specific needs of the IPTV content provider, after the collected
Perform statistical analysis on the data, and report the statistical analysis results to content providers to provide statistical services; at the same time, the IPTV media delivery system also
The experience accumulated in the past and the user’s access to the content provided by the corresponding content provider can be used to analyze and determine the
Corresponding security threats that may be brought by content sources, provide content providers with corresponding report information.
This application scenario includes but is not limited to user usage statistics services.
5.2.3 QoE Improved Service Application Scenarios
The improvement of user experience quality involves all links in the entire chain from content source to user terminal, corresponding to different application methods
QoE indicators are also different. For live broadcast services, the switching speed of channels is also one of the indicators that affect the quality of user experience.
The difference in packet and network congestion levels are also related factors that affect the quality of user experience. Some of the above factors can usually be found in the ring closest to the user end.
Section adopts corresponding technology or strategy to solve, thereby improving the quality of user experience. In this application scenario, the IPTV media delivery system provides
Providers can use their own technology to provide content providers with corresponding services that improve the quality of user experience.
This application scenario includes but is not limited to ARQ, FCC, code stream adaptive service, packet loss compensation service, and FEC service.
6 Demand for IPTV media delivery system
6.1 Requirements of service providers for media delivery systems
The requirements of business providers for media delivery systems are as follows.
a) Support distributed media delivery system architecture;
b) Support services provided by means of recording and broadcasting live broadcast, live live broadcast, on-demand, download, push, network personal recording or live broadcast time shift
And application and virtual content delivery system services;
c) Support information insertion or information services (including emergency notification or broadcast) with regional characteristics or personalized information;
d) Support the simultaneous provision of the same business or service to end users who adopt different access methods and different types of terminals;
e) When using the on-demand method to provide services, support the interactive control of the end user on the media content consumed (for example, using 2, 4, 8
Controls such as fast forward and fast reverse at equal multiples);
f) When providing live broadcast services, support end users to review the content of live broadcasts that have been broadcast for a period of time;
g) Support end users to use the media delivery system to record the selected content according to their personal needs;
h) Support transparent transmission of media content;
i) Support the distributed storage or caching of specified media content according to the requirements of the service provider, and support the update of the media content (including
Including additions and deletions).
6.2 End user needs for media delivery system
The end users' requirements for the media delivery system are as follows.
a) Support end users to use business or services with different types of terminals (including smart phones, TVs with set-top boxes, and computers)
At the same time, it supports that during the use of the business, the end user can replace the end user terminal according to their own needs without interrupting the terminal
User use business;
b) Provide acceptable business service quality requirements, and the service quality provided by the system should meet the requirements of 11.1 and YD/T 1823-2008
YD/T 1654-2007 in 7.3.2 regulations;
c) Support the upload and delivery services of end-user media content (e.g. end-user email and other media information, optional);
d) Support to reserve storage space for end users to store relevant media content according to the request of end users;
e) Support the distribution and delivery of personalized media content and advertising content.
6.3 Requirements for media delivery system functions
The requirements for the functions of the media delivery system are as follows.
a) Support distributed media content storage or caching;
b) Support distributed businesses and services;
c) Support on-demand, live broadcast (recorded live broadcast, live broadcast), download, push, time-shifted TV, network recording, broadcast control and other services and
service;
d) Support unicast and multicast transmission methods;
e) Support load balancing;
f) Ensure the reliability and security of business and content;
g) Provide support for multi-service operators;
h) Have the ability to guarantee QoS and QoE of the business;
i) Support transparent transmission of content;
j) Provide smooth system expansion capability;
k) Support terminal user authority control and cost control;
l) Support error correction capability for media content distribution;
m) Support the error correction capability of media content storage;
n) Possess error correction and fault tolerance capabilities for streaming services;
o) Support the establishment of virtual media delivery systems and the provision of services;
p) Support the distribution and delivery of distributed media content source content;
q) It has the function of connecting with the IP bearer network;
r) Support media content delivery triggered by two methods. "push" and "pull" (push and request to send);
s) Support media routing function.
6.4 Requirements for information processing functions of media delivery systems
The requirements for the information processing functions of the media delivery system are as follows.
a) The information processing module in the media delivery system should support the preprocessing or real-time processing of media content (encoding, compression, streaming,
Slices etc.);
b) In order to support the needs of simultaneously serving different types of terminals, the media delivery system should support the use of different encoding standards to
The same information of the provider is processed;
c) Support the transcoding function of media content.
6.5 Demand for media content types provided by media delivery systems
The requirements for the types of media content provided by the media delivery system are as follows.
a) Support single video multi-audio track program stream (for example. one audio with audio description);
b) Support various types of media content (including text, still image, audio, video, multi-audio, multi-text, combined media types
Content) distribution and delivery services.
6.6 Requirements for media delivery methods of media delivery systems
The requirements for the media delivery method of the media delivery system are as follows.
a) Support content delivery by push or pull;
b) Support multiple content distribution strategies (such as push according to schedule, dynamic content pull, multi-source content pull);
c) Support media delivery services in unicast or multicast mode according to the strategy;
d) Support the simultaneous delivery of media information from multiple sources to end users with a certain degree of synchronization.
6.7 Demand for media delivery system management
The requirements for media delivery system management are as follows.
a) Support the management of storage media content in the media delivery system;
b) Support the management of the operating status of related equipment in the media delivery system;
c) Support the management of the load status in the media delivery system;
d) Support the management of related information such as the usage of end users who use the media delivery system;
e) Support the management of the usage of service providers using the media delivery system.
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