GB/T 36998-2018Technical requirements and measurement methods for ASI combiner/splitter used in program distribution network (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

1 Scope

This standard specifies the main technical requirements and measurement methods for the ASI combiner/splitter in the program distribution network.

This standard applies to the development, production, application, measurement, operation and maintenance of the program distribution network ASI combiner/splitter.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 17975.1-2010 Information technology - Generic coding of moving pictures and associated audio information - Part 1

GB/T 26686-2017 General specification for terrestrial digital television receivers

GB/T 28434-2012 Terrestrial digital television broadcasting single frequency network adapter technical requirements and measurement methods

3 Abbreviations

The following abbreviations apply to this document.

AC. AlternatingCurrent

ASI. Asynchronous Serial Interface (AsynchronousSerialInterface)

BER. bit error rate (BitErrorRatio)

BNC. BayonetNeil-Concelman

SIP. Second Frame Initialization Package (SecondFrameInitializationPacket)

TS. Transport Stream (TransportStream)

4 ASI combiner/splitter function overview

The ASI combiner/splitter can combine and distribute the multiple TS streams using the ASI interface to improve the program distribution network. The utilization efficiency of the network. After the TS stream passes through the ASI combination and split, the structure, sequence, and bit of the code stream do not change, therefore, ASI The combiner/splitter can be used not only for multi-channel TS transmission under general conditions, but also for terrestrial digital TV broadcasting single-frequency network. Streaming requires a stricter program distribution network. The structure of the multi-program distribution network using ASI combiner/splitter is shown in Figure 1. ASI The code stream structure of the circuit/splitter output is shown in Figure 2.