1、BRITISH STANDARD BS EN 60107-8:1997 IEC 60107-8: 1997 Recommended methods of measurement on receivers for television broadcast transmissions Part 8: Measurements on D2-MAC/packet equipment The European Standard EN 60107-8:1997 has the status of a British Standard ICS 33.160.20BSEN60107-8:1997 This B
2、ritish Standard, having been prepared under the directionof the Electrotechnical Sector Board, was published underthe authority of the Standards Board and comes intoeffect on 15October1997 BSI 11-1999 ISBN 0 580 28442 5 National foreword This British Standard is the English language version of EN601
3、07-8:1997. It is identical with IEC60107-8:1997. The UK participation in its preparation was entrusted by Technical Committee EPL/100, Audio, video and multimedia systems and equipment, to Subcommittee EPL/100/1, Receiving equipment, which has the responsibility to: aid enquirers to understand the t
4、ext; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this subcom
5、mittee can be obtained on request to its secretary. From1January1997, all IEC publications have the number60000added to the old number. For instance, IEC27-1has been renumbered as IEC60027-1. For a period of time during the change over from one numbering system to the other, publications may contain
6、 identifiers from both systems. Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally include an annex which lists normative references to international publications with their corresponding European publications. The British Standards which implement international
7、or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all t
8、he necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii
9、, theEN title page, pages2to44, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSEN
10、60107-8:1997 BSI 11-1999 i Contents Page National foreword Inside front cover Foreword 2 Text of EN60107-8 3 ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60107-8 July 1997 ICS 33.160.20 Descriptors: Television systems, television receivers, high definition television, measurement, vi
11、deo signals, signals, data, acoustic signals, frequency modulation, amplitude modulation, distorsion, quality English version Recommended methods of measurement on receivers for television broadcast transmissions Part8: Measurement on D2-MAC/packet equipment (IEC 60107-8:1997) Mthodes recommandes po
12、ur les mesures sur les rcepteurs de tlvision Partie 8: Mesures sur les quipements D2-MAC/paquet (CEI 60107-8:1997) Meverfahren fr Empfnger von Fernseh-Rundfunksendungen Teil 8: Messungen an D2-MAC/Paket-Einrichtungen (IEC 60107-8:1997) This European Standard was approved by CENELEC on1997-07-01. CEN
13、ELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on
14、application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secr
15、etariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CENELEC
16、 European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1997CENELEC All rights of exploitation in any form and by any means reserved worldwide fo
17、r CENELEC members. Ref. No. EN 60107-8:1997EEN60107-8:1997 2 BSI 11-1999 Foreword The text of document100A/31/FDIS, future edition1of IEC60107-8, prepared by SC100A, Multimedia end-user equipment, of IEC TC100, Audio, video and multimedia systems and equipment, was submitted to the IEC-CENELEC paral
18、lel vote and was approved by CENELEC as EN60107-8on1997-07-01. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. Annexes designated “informative” are given for information only. In this standard,Annex ZA is normative and Annex A andAnnex B are infor
19、mative. Annex ZA has been added by CENELEC. Endorsement notice The text of the International Standard IEC60107-8:1997was approved by CENELEC as a European Standard without any modification. Contents Page Foreword 2 1 General 3 1.1 Scope and object 3 1.2 Normative references 3 2 Definitions 3 3 Measu
20、rements 6 3.1 Introduction 6 3.2 General conditions 7 3.3 Description of test signals 7 4 Video signal measurement 8 4.1 Distortion measurements using test lines 8 4.2 Distortion measurements not feasible with test lines 9 4.3 Noise measurements 10 Page 5 Measurement methods on the data signal 12 5.
21、1 Bit error rate 12 5.2 Eye diagram 12 5.3 Equivalent degradation measurement 12 5.4 Operating margin 13 Annex A (informative) Relation between baseband measurements and RF measurements 28 Annex B (informative) Relations between subjective quality assessment and the objective measurement of paramete
22、rs 39 Annex ZA (normative) Normative references to international publications with their corresponding European publications Inside back cover Figure 1 Hypothetical reference chain notional block diagram 17 Figure 2 Eye diagram for the duobinary signal 18 Figure 3 Test signal No 1, line 312 19 Figur
23、e 4 Test signal No 2, line 623 20 Figure 5 Test signal No 3, line 624, positive polarity 21 Figure 6 Test signal No 4, line 311 22 Figure 7 Test signal No 5, line 1 22 Figure 8 Test signal No 6, line 313 23 Figure 9 Rosman chart 24 Figure 10 A mask for the response to a shaped step 25 Figure 11 Unif
24、ied random noise weighting filter for D2-MAC 26 Figure 12 Theoretical bit error ratio as a function of S/N (unweighted 1 V/5 MHz bandwidth) 27 Table 1 Definition of signal No 1, line 312 13 Table 2 Definition of signal No 2, line 623 14 Table 3 Definition of signal No 3, line 624 14 Table 4 Definiti
25、on of signal No 4, line 311 15 Table 5 Definition of signal No 5, line 1 16 Table 6 Definition of signal No 6, line 313 16 latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1998-04-01 latest date by which the
26、national standards conflicting with the EN have to be withdrawn (dow) 1998-04-01EN60107-8:1997 BSI 11-1999 3 1 General 1.1 Scope and object The object of this part of IEC 60107is to define quality parameters and to provide a guideline for measurement on D2-MAC/packet equipments, under uniform and re
27、petitive conditions. The D2-MAC/packet process is specified in EBU SPB 489. The specifications of the limit values of the various parameters of the equipments are outside the scope of this standard; however theoretical curves and references are provided which could be used as a guide for presentatio
28、n of measurement results. The characterization of signal performances at the radiofrequency interface is difficult to specify and measure; however, correlation elements between RF measurement and baseband measurement are given inAnnex A. Relations between subjective quality assessment and objective
29、measurement of parameters are developed inAnnex B. 1.2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC 60107. At the time of publication, the editions indicated were valid. All normative docume
30、nts are subject to revision, and parties to agreements based on this part of IEC 60107are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. I
31、EC 60107-1:1977, Recommended methods of measurement on receivers for television broadcast transmissions Part 1: General considerations Electrical measurements other than those at audio-frequencies. IEC 60107-5:1992, Recommended methods of measurement on receivers for television broadcast transmissio
32、ns Part 5: Electrical measurements on multichannel sound television receivers using the NICAM two-channel digital sound-system. IEC 61079-2:1992, Methods of measurement on receivers for satellite broadcast transmissions in the 12GHz band Part 2: Electrical measurement on DBS tuner units. IEC 61079-5
33、:1993, Methods of measurement on receivers for satellite broadcast transmissions in the 12GHz band Part 5: Electrical measurements on decoder units for MAC/packet systems. ITU-T Recommendation J.61:1990, Transmission performance of television circuits designed for use in international connections. I
34、TU-R Recommendation BT 601-5:1995, Encoding parameters of digital television for studios. ITU-R Recommendation BO 650-2:1992, Standards for conventional television systems for satellite broadcasting in the channels defined by Appendix 30of the Radio Regulations. EBU SPB 489:1985, Specification of D2
35、-MAC/packet system. 2 Definitions For the purpose of this part of IEC60107, the following definitions apply. 2.1 hypothetical reference chain The distribution of global tolerances between the various elements of a television system, from the picture source to the display. NOTEThe notional block diag
36、ram of such a chain is shown inFigure 1 and each block is described below. 2.1.1 studio encoder single entity providing the D2-MAC/packet baseband signal 2.1.2 modulator this entity modulates the baseband signal into the appropriate signal for the foreseen transmission/broadcasting systemEN60107-8:1
37、997 4 BSI 11-1999 2.1.3 transmission/broadcasting system the transmission/broadcasting system may be either: a terrestrial broadcasting system; a satellite broadcasting system; a distribution system on coaxial support; a distribution system on optical support. 2.1.4 receiving equipment the receiving
38、 equipment may be split into two parts: a demodulation unit and a decoding unit, or may consist of a decoding unit only the demodulation unit comprises a radiofrequency input, a selection-demodulation unit and a baseband output the decoding unit comprises a baseband input, a decoding unit, and an au
39、diovisual components output 2.2 interfaces three types of interfaces can be distinguished: baseband (see also points 1, 4and 5ofFigure 1), radiofrequency (see also points2and3ofFigure 1) and audiovisual component signals (see also points0,6and7ofFigure 1) NOTE 1The receiving equipment interfaces are
40、 described below for a better understanding of the measurements (seepoints0to7ofFigure 1). a) point 3 shows the RF input from cable distribution or from outdoor unit for satellite reception; b) point 5 shows the regulated baseband D2-MAC/packet output generally used for control and measurement; c) p
41、oint 6 shows the output interface of a D2-MAC/packet decoder used in IEC61079-5for measurements on the quality of the restored picture components; d) point 7 shows another interface possibility which allows to use the current measurement equipment which is generally developed for measurement on Y, C
42、r and Cb. Unfortunately, its use requires the installation of a reference matrixing. NOTE 2Unless otherwise specified in this standard, the measurements are assumed to be done at point5and the decoded signal is assumed to be observed at point6ofFigure 1. 2.3 Quality parameters for a D2-MAC/packet si
43、gnal 2.3.1 Parameters for the MAC signal 2.3.1.1 MAC analogue waveform the MAC analogue waveform is derived directly from the 4 : 2 : 2standard for digital television (seeITU-R601-3). MAC coding consists of sequentially transmitting chrominance information compressed in a ratio of3, and luminance in
44、formation compressed in a ratio of3/2. Based on the sampling frequencies used in4 : 2 : 2(13,5MHz for luminance and6,75MHz for chrominance), the sampling frequency in MAC is20,25MHz, and the nominal band is8,4MHz (or5,6MHz in luminance after decompression) 2.3.1.2 nominal signal amplitude the differ
45、ence between the white level and the black level transmitted in line624 NOTEThe nominal amplitude of the MAC signal is1V. 2.3.1.3 Distortion 2.3.1.3.1 gain/frequency response distortion the gain variation between the circuit input and output, over the frequency range extending from the frame frequen
46、cy to the nominal system cut-off frequency, relative to the gain at an appropriate reference frequency 2.3.1.3.2 phase distortion the difference in degrees relative to the linear phase characteristic over a frequency band extending from, ideally, 0Hz to a defined upper frequencyEN60107-8:1997 BSI 11
47、-1999 5 2.3.1.3.3 group delay time distortion the difference between the group delay time for each frequency and the group delay time at a determined frequency, expressed in nanoseconds 2.3.1.3.4 long time distortion when a test signal simulating a sudden variation of the black or white luminance co
48、mponent, or vice versa, is applied to a circuit input, long time distortion appears if clamping level variations (medium grey level) of the signal at the output do not precisely follow the signal clamping level at the input. These variations are either in exponential form, or more frequently in damp
49、ened oscillatory form at very low frequency 2.3.1.3.5 distortion of duration of the order of one frame when a test signal simulating a variation of the luminance component from black to white with a period of the same order as the frame duration (40ms), with an amplitude equal to the nominal amplitude of the luminance signal, is applied to the circuit input, distortion is defined as the modification to the shape of the test signal at the output 2.3.1.3.6 distortion of duration of the order of one li
