DVB系统测量指南：2014年修订版

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"ETSITR101290V1.3.1是一个关于数字视频广播(DVB)系统测量的官方技术报告，发布于2014年7月。这份文档详细规定了对DVB系统进行性能评估和质量控制的标准方法，它是根据RTR/JTC-DVB-340标准制定的。DVB是一种数字电视广播标准，它涵盖了广播、数字化、电视和视频传输领域。关键词包括：广播、数字、DVB、电视和视频。报告的主要内容包括测量方法的定义、参数选择、测试环境的要求以及如何进行信号接收质量的评估，如误码率（BER）、信噪比（SNR）和图像质量指标等。此外，它还强调了确保技术文档的准确性和一致性的重要性，指出任何电子或纸质版本的修改都必须得到ETSI的书面授权，以防止信息的误导或混淆。用户在使用这份报告时应注意，由于技术的发展和需求变化，文档可能面临修订或状态变更，因此应参考PDF格式的官方发布版本，通常存储在ETSI秘书处的特定网络驱动器上。对于任何版本之间的差异，以PDF打印版为准。 ETSITR101290V1.3.1是通信工程和技术人员在设计、实施和维护DVB系统时不可或缺的参考文献，它提供了清晰的指导，帮助确保系统的可靠性和服务质量。"

ETSI

ETSI TR 101 290 V1.3.1 (2014

07)

MGPR MISO Group Power Ratio

MI Modulator Interface

MIP Mega-frame Initialization Packet

MISO Multiple Input Single Output

MLR Media Loss Rate

MMDS Microwave Multi-point Distribution Systems (or Multi-channel Multi-point Distribution Systems)

MPEG Moving Picture Experts Group

MPTS Multi-Program Transport Stream

MR Nominal Media Rate

MTU Maximum Transmission Unit

MUX Multiplex

MVDS Multi-point Video Distribution Systems

NIT Network Information Table

NM Noise Margin

OB Occupied Bandwidth

OFDM Orthogonal Frequency Division Multiplex

PAPR Peak to Average Power Ratio

PAT Program Association Table

PCR Program Clock Reference

PDH Plesiochronous Digital Hierarchy

PER Packet Error Rate

Number of interleaving T2 frames

PID Packet Identifier

PJ Phase Jitter

PLL Phase Locked Loop

PLP Physical Layer Pipe

PMT Program Map Table

PRBS Pseudo Random Binary Sequence

printf symbol in the C programming language

PSI MPEG-2 Program Specific Information

NOTE: As defined in ISO/IEC 13818-1 [i.1].

PTS Presentation Time Stamps

QAM Quadrature Amplitude Modulation

QAM-M QAM systems with e.g. M = 16, 32 and 64

Bit error probability

QE Quadrature Error

QEF Quasi Error Free

QPSK Quaternary Phase Shift Keying

Symbol error probability

RBA Receiver Buffer Assumptions

RBM Receiver Buffer Model

RBW Resolution Bandwidth

RC FEC rate

REC Receiver

RF Radio Frequency

RFC IETF Request For Comments

Information rate

RMS Root Mean Square

RS Reed-Solomon

RST Running Status Table

NOTE: See EN 300 468 [i.7].

Transmission rate

RTE Residual Target Error

RTP Real Time Protocol

SDH Synchronous Digital Hierachy

SDP Severely Disturbed Period

SDT Service Description Table

SEP Symbol Error Probability

SER Symbol Error Rate

ETSI

ETSI TR 101 290 V1.3.1 (2014

07)

SES Seriously Errored Second

SETI Severely Errored Time Interval

SFN Single Frequency Network

SI Service Information

SINR Signal to Interference Noise Ratio

SMATV Satellite Master Antenna TeleVision

SMPTE Society of Motion Picture and Television Engineers

SNR Signal-to-Noise Ratio

ST Stuffing Table

STD System Target Decoder

STE System Target Error

STS Synchronisation Time Stamp

SUS Severely Uncorrectable Second

SUTI Severely Uncorrectable Time Interval

SYNC Synchronisation

TDT Time and Date Table

TEV Target Error Vector

TFS Time-Frequency-Slicing

TH Transport Header

TOT Time Offset Table

TPS Transmission Parameter Signalling

TS Transport Stream

TSTD Transport Stream Description Table

TU Typical Urban

TV TeleVision

TX-SIG Transmitter Signalling

UAT Unavailable Time

UDP User Datagram Protocol

UHF Ultra-High Frequency

UI Unit Interval

uimsbf unsigned integer, most significant bit first

UP Uncorrectable Packet

US Uncorrectable Second

UTC Universal Time Co-ordinated

UTI Uncorrectable Time Interval

VB Virtual Buffer

VBR Variable Bit Rate

VBW Video Bandwidth

4 General

The Digital Video Broadcasting (DVB) set of digital TV standards specify baseline systems for various transmission

media: satellite, cable, terrestrial, etc. Each baseline system standard defined the channel coding and modulation

schemes for that transmission medium. The source coding was adapted from the MPEG-2 standard.

The design of these new systems has created a demand for a common understanding of measurement techniques and the

interpretation of measurement results.

The present document is an attempt to give recommendations in this field by defining a number of measurement

techniques in such detail that the results are actually comparable as long as the measurement is carried out in

compliance with the given definition.

Engineers seeking to apply the methods described in the present document should be familiar with the standards for the

respective baseline systems. Although most of the parameters specified in the present document are well known in

communications, most of them should be interpreted with respect to the new environment, especially the transmission

of digital TV signals or other related services.

The inclusion of each parameter in the present document is based on requirements from those who envisage having to

work alongside the defined procedures. This includes network operators and providers of equipment for network

installation, as well as manufacturers of Integrated Receiver Decoders (IRD) or test and measurement equipment.

ETSI

ETSI TR 101 290 V1.3

.1 (2014

07)

The recommendations of the present document can be used:

- to set-up test beds or laboratory equipment for testing hardware for digital TV and other related services;

- to set these instruments to the appropriate parameters;

- to obtain unambiguous results that can be directly compared with results from other test set-ups;

- to form a potential basis for communicating results in an efficient way by using the definitions in the present

document as references.

They are not intended to describe a set of compulsory tests.

The recommendations are grouped in several clauses. Since the MPEG-2 TS is the signal format used for the inputs and

outputs of all baseline systems, clause 5 is devoted to the description of checking procedures for those parameters which

are accessible in the TS packet header, i.e. without decoding scrambled or encrypted data. The aim of these tests is the

provision of a simple and fast health check. It is meant neither as a MPEG-2 conformance test nor as a compliance test

for all DVB related issues.

Clause 6 contains the parameters which are commonly addressed by various transmission media. For example, the

measurement of the availability of transmission systems or links falls into this category, and it may be desirable to have

the same definition for availability independent of the actual system in use.

Clauses 7 and 8 address the parameters which are specific for cable and satellite, DVB-C and DVB-S, they are also

applicable to SMATV systems, DVB-CS, and possibly MMDS systems such as DVB-MC and DVB-MS.

Clause 9 addressed parameters specific to the terrestrial DVB environment (DVB-T).

Clauses 6, 7, 8, and 9 of the present document follow the same structure. For each parameter there is a description of the

purpose of the recommended measurement procedure, the interface to which the measurement instrument should be

applied, and a description of the actual method of the measurement itself.

Apart from these clauses a number of annexes are included, containing recommendations for general aspects, examples

of test set-ups and certain requirements for the test and measurement equipment.

If the interfaces for a described measurement procedure are to be found within the transmitter, the notation is provided

in accordance with figures 4.1 and 9.1 for DVB-T (the 1

generation terrestrial DVB system). If the interfaces for the

described measurement procedures are to be found within the receiver (test receiver or IRD), the notation is provided in

accordance with figures 4.2 and 9.2 for DVB-T. These figures illustrate the general cases of a DVB transmitter and

receiver of the 1

generation systems, although certain functional blocks only appear in certain systems.

Most of the parameters can be measured with standard equipment such as spectrum analysers or constellation analysers.

Other parameters are defined in a new way as a request to test and measurement equipment manufacturers to integrate

this functionality in their products.

Figure 4.1: Transmitter block diagram

ETSI

ETSI TR 101 290 V1.3.1 (2014

07)

Figure 4.2: Receiver block diagram

The clauses 11 and 12 address two of the DVB transmission systems of the 2

generation, DVB-T2 and DVB-C2. In

clause 11 the sub-clause 11.2 includes the definition of measurement parameters for the DVB-T2 Modulator Interface

DVB-T2 MI.

The block diagrams for these 2

generation transmission systems can be found in the respective clauses.

5 Measurement and analysis of the MPEG-2 Transport

Stream

5.1 General

The MPEG-2 Transport Stream (TS) is the specified input and output signal for all the baseline systems, i.e. for

satellite, cable, SMATV, MMDS/MVDS and terrestrial distribution, which are defined in the DVB world so far.

Therefore these interfaces are accessible in the transmission chain. Direct access is given on the transmitter side at the

input of the respective baseline system. At other interfaces where the signal occurs in modulated form, access is

possible by an appropriate demodulator that provides the TS interface as an output for further measurements.

5.2 List of parameters recommended for evaluation

The present document recommends in this clause a set of syntax and information consistency tests that can be applied to

an MPEG-2 TS at the parallel interface, or either of the serial interfaces defined in EN 50083-9 [i.10].

The following assumptions and guiding principles were used in developing these tests:

- the tests are mainly intended for continuous or periodic monitoring of MPEG-2 TSs in an operational

environment;

- these tests are primarily designed to check the integrity of a TS at source; clause 5.3 covers other aspects of

TSs in networks including impairments created by transport systems;

- the general aim of the tests is to provide a "health check" of the most important elements of the TS. The list of

the tests is not exhaustive;

- the tests are consistent with the MPEG-2 Conformance tests defined in ISO/IEC 13818-4 [i.2], they do not

replace them;

- the tests are consistent with the DVB-SI documents (EN 300 468 [i.7], TR 101 211 [i.8]), they do not replace

them.

MPEG-2 and DVB-SI reserved values in the TS do not cause a test error indication.

In general the tests are performed on TS header information so that they are still valid when conditional access

algorithms are applied, however a few of the tests may only be valid for an unscrambled or descrambled TS.

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