hysAnalyser --- 关于 DVB (P)SI sections 周期的说明-优快云博客

摘要

本文详细描述了 DVB 各数据表重复率的标准要求，是 TR 101290 统计的依据。

工具概述

hysAnalyser 是一款专业 MPEG-TS 数据分析工具，定位于

1）音视频开发和测试人员：和MEPG-TS有关开发、调试、测试辅助；

2）和MPEG-TS相关业务系统的运维人员：如数字电视、OTT、互联网流媒体等领域，协助用户跟踪和分析查错和定位TS数据、DVB业务数据表问题，并且还可以支持定制化的MPEG-TS素材制作和转存。

关于它的完整介绍，作者写过综述，有兴趣的可以访问如下地址（包含授权注册说明）：

知乎：hysAnalyser v1.2.003版本发布

腾讯云：TS流分析专栏 https://cloud.tencent.com/developer/column/105278

标准参考来源

-《ETSI TR 101 211》4.4 Minimum repetition rates

-《ETSI EN 300 468》5.1.4 Repetition rates and random access

来源1《ETSI TR 101 211》4.4 Minimum repetition rates

4.4 Minimum repetition rates

4.4.1 Satellite and cable delivery systems

For satellite and cable delivery systems, where there will usually be sufficient bandwidth within a single delivery
system to carry the SI, the following minimum repetition rates are specified:
a) all sections of the NIT will be transmitted at least every 10 s, including those for other delivery systems, ifpresent;
b) all sections of the BAT will be transmitted at least every 10 s, if present;
c) all sections of the SDT for the actual multiplex will be transmitted at least every 2 s;
d) all sections of the SDT for other TSs will be transmitted at least every 10 s, if present;
e) all sections of the EIT Present/Following Table for the actual multiplex will be transmitted at least every 2 s;
f) all sections of the EIT Present/Following Table for other TSs will be transmitted at least every 10 s, if present;
g) all sections of the EIT Schedule Table for the first 8 days will be transmitted at least every 10 s, including those for other TSs, if present;
h) all sections of the EIT Schedule Table for further than 8 days ahead will be transmitted at least every 30 s, including those for other TSs, if present;
i) the TDT and the TOT will be transmitted at least every 30 s.

4.4.2 Terrestrial delivery systems

For terrestrial delivery systems bandwidth within a single transmitted TS is a valuable resource and in order to
safeguard the bandwidth allocated to the primary services receivable from the actual multiplex, the following minimum
repetition rates are specified in order to reflect the need to impose a limit on the amount of available bandwidth used for this purpose:
a) all sections of the NIT will be transmitted at least every 10 s;
b) all sections of the BAT will be transmitted at least every 10 s, if present;
c) all sections of the SDT for the actual multiplex will be transmitted at least every 2 s;
d) all sections of the SDT for other TSs will be transmitted at least every 10 s if present;
e) all sections of the EIT Present/Following Table for the actual multiplex will be transmitted at least every 2 s;
f) all sections of the EIT Present/Following Tables for other TSs will be transmitted at least every 20 s if present.

The repetition rates for further EIT tables will depend greatly on the number of services and the quantity of related SI information. The following transmission intervals should be followed if practicable but they may be increased as the use
of EIT tables is increased. The times are the consequence of a compromise between the acceptable provision of data to a viewer and the use of multiplex bandwidth.

a) all sections of the EIT Schedule table for the first full day for the actual TS, will be transmitted at least every 10 s, if present;
b) all sections of the EIT Schedule table for the first full day for other TSs, will be transmitted at least every 60 s, if present;
c) all sections of the EIT Schedule table for the actual TS, will be transmitted at least every 30 s, if present;
d) all sections of the EIT Schedule table for other TSs, will be transmitted at least every 300 s, if present;
e) the TDT and TOT will be transmitted at least every 30 s.

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来源2 《ETSI EN 300 468》5.1.4 Repetition rates and random access

5.1.4 Repetition rates and random access

In systems where acquisition time of PSI and SI in DVB transport streams is important, it is recommended to
continuously re-transmit these sections at regular intervals, even when no changes occur. Clause 4.4 of ETSI
TS 101 211 [i.1] makes recommendations for how often PSI and SI sections should be re-transmitted.
For SI specified within the present document the minimum time interval between the arrival of the last byte of a section
to the first byte of the next transmitted section with the same PID, table_id and table_id_extension and with the same or
different section_number shall be 25 ms. This limit applies for TSs with a total data rate of up to 100 Mbit/s