GY/T 327-2019Technical specification of 10Gbps IP video broadcast for CATV network (English PDF)

3.1 Terms and definitions

The following terms and definitions apply to this document.

3.1.1

Fiber to the home

In cable television networks or other networks, only the fiber-optic medium is used to connect the access network office and the home residential access method.

3.1.2

10Gbps unidirectional IP broadcast A kind of baseband IP stream broadcast based on 10 Gigabit Ethernet physical layer protocol implemented on optical distribution network.

3.1.3

IP broadcast channel Especially refers to the data channel identified by the class D IP address and the UDP destination port in the 10 Gigabit IP broadcast, usually each channel corresponds to a digital TV Transport stream or service stream.

3.1.4

Main channel

Broadcast service channel for transmitting digital television service index data.

3.2 Acronyms

The following abbreviations apply to this document.

ACT Area Code Table

BER Bit Error Rate

BSI Broadcast Service Information bslbf bit string (left bit first) DLT 10 Gigabit IP Broadcast Distribution Terminal (Distribution Line Terminal) DTT Date Time Table DVB Digital Video Broadcast EPG Electronic Program Guide EPON Ethernet Passive Optical Network HTML Hyper Text Markup Language HTTP Hyper Text Transfer Protocol ID (Identity) IEEE Institute of Electrical and Electronics Engineers IPv4 Internet Protocol, version 4 IPv6 Internet Protocol, version 6 GPON Gigabit-Capable Passive Optical Network MIT Channel Information Table MPEG Moving Pictures Expert Group MPTS Multi-program Transport Stream ONU Optical Network Unit OTT Internet TV (Over The Top) PID Packet Identifier PON Passive Optical Network rpchof remainder polynomial coefficients, highest order first SFP Small Form-factor Pluggable SI Service Information SNLT Service Name List Section Table SPTS Single Program Transport Stream SVT Service Version Table TS Transport Stream UDP User Datagram Protocol uimsbf unsinged integer, most significant bit first UTC Coordinated Universal Time VOD Video On Demand XML Extensible Markup Language

3.3 Convention

The following conventions apply to this document.

3.3.1 Version number

The version number is used to identify the version of this standard to support compatibility identification of the system. The current version number of this standard is 1.0.0, which is the major version the version number (versionMajor) is 1, the minor version number (versionMinor) is 0, and the micro version number (versionMicro) is 0.

3.3.2 Text Character Encoding

Unless otherwise specified, the text character encoding defaults to GB 18030-2005.

3.3.3 Reserved bits

Unless otherwise specified, all reserved bits in this standard shall be set to '1'.

4 10G unidirectional IP broadcast system

4.1 Overview

Cable TV network fiber-to-the-home 10G unidirectional IP broadcast system uses 1550nm wavelength to realize 10G IP data through optical power distribution Stream broadcast transmission. As shown in Figure 1, the 10G unidirectional IP broadcast system is mainly composed of the IP broadcast front end, IP broadcast transmission network and IP broadcast receiving module.

Partial composition. Among them, the business data is transmitted step by step from the national level service platform to the prefecture and city service platforms.

After adding local service data as required, the data is broadcast to each user terminal through the optical transmission network in the format of a UDP multicast message.

End, here the UDP multicast format multicast address and UDP port number are used to distinguish different digital TV programs in the broadcast data. The specific group See Appendix A for broadcast address planning. The 10 Gigabit unidirectional IP broadcast receiving module is usually located in the user access terminal system.

Broadcast UDP multicast packets, and select broadcast program streams based on their multicast addresses and port numbers.

IP broadcast transmission network City-level business platform IP broadcast front-end IP broadcast Receiving module IP broadcast Receiving module IP broadcast Receiving module National Business Platform Provincial Business Platform 10G unidirectional IP broadcast system

Figure 1 Composition of 10 Gigabit unidirectional IP broadcast system

The 10 Gigabit unidirectional IP broadcast optical network can form a single unidirectional broadcast system and operate independently to carry out television broadcast services, as shown in Figure 2.

It can also work with two-way transmission systems (EPON/GPON, etc.) to build a 10 Gigabit broadband access network, that is, I-PON solution, which supports the TV live broadcast industry.

Services and two-way interactive video and high-speed data services (VOD video on demand, OTT TV Internet TV and Internet access, etc.), as shown in Figure 3 as shown. Refer to Appendix B for the network reconstruction plan of bidirectional networking. See Appendix C for examples of G/EPON bidirectional network convergence applications. I-PON Code Type networking solutions include single-fiber three-wave networking and dual-fiber three-wave networking. For details, see GY/T 306.1-2017.

DVB platform

business platform