1、BRITISH STANDARD Recommended methods of measurement on receivers for television broadcast transmissions Part 8. Measurements on D2-MAWpacket equipment The European Standard EN 60107-8 : 1997 has the status of a British Standaxd ICs 33.160.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY C
2、OPYRIGHT LAW BS EN 60107-8 : 1997 IEC 60107-8 : 1997 - STD-BSI BS EN bOLU7-8-ENGL 1797 M Lb24bb9 Ob47300 LTL Amd. No. Date BS EN 60107-8 : 1997 Textaffected National foreword This British standard is the English language vemion of EN 60107-8 : 1997. It is identical with EC 60107-8 : 1997. The UK par
3、ticipation in its prepasation was entrusted by Technical Committee EPUl, Audio, video and multimedia system and equipment, to Subcommittee EPU100/1, Receiving equipment, which has the responsibility to: , - aid enquirem to understand the text; - present to the responsible internationalEuropean commi
4、ttee any enquiries on the interpretaion, or proposals for change, and keep the UK interests iIlfOed; - monitor relacd international and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. ,. From 1
5、 January 1997, all IEC publications have the number 60000 added to the old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1. For a period of time during the change over nom one numberjng system to the other, publications may contain identiem from both systems. Cross-references Atten
6、tion is drawn to the fact that CEN and CENELEC Standards normally include an annex which lists nonnative references to international publications with their corresponding European publications. The British Standards which implement international or European publications referred to in this document
7、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. Compliance with a British Standard does not of itself confer immunity from legai obligations. This British Sta
8、ndard, having been prepared under the direction of the Eledrotechnid Sector Board, was published under the authority of the Standards Board and comes into effect on 15 October 1997 O BSI 1997 ISBN O 680 2442 6 STD-BSI BS EN bO107-8-ENGL 1797 1b24bb9 Ob47303 038 = EUROPEAN STANDARD NORME EUROPENNE EU
9、ROPISCHE NORM EN 60107-8 July 1997 ICs 33.1 60.20 Descriptors: Television systems, television receivers, high definition television, measurement, video signals, signais, data, acoustic signals, frequency modulation, amplitude modulation, distorsion, quality English version Recommended methods of mea
10、surement on receivers for television broadcast transmissions Part 8: Measurement on D2-MAWpacket equipment (IEC 601 07-8: 1997) Mthodes recommandes pour les Meverfahren fr Empfnger von mesures sur les rcepteurs de tlvision Fer nse h-R u n d f u n kse nd u n g e n Partie 8: Mesures sur les quipements
11、 Teil 8: Messungen an D2-MAC/paquet D2-MAC/Paket-Einrichtungen (CE1 601 07-8: 1997) (IEC 601 07-8: 1997) This European Standard was approved by CENELEC on 1997-07-01. CENELEC members are bound to comply with the CENICENELEC Internal Regulations which stipulate the conditions for giving this European
12、 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 application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English
13、, 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 Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Bel
14、gium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnicat Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr E
15、lektrotechnische Normung Central Secretariat: rue de Stassart 35, 6 - 1050 Brussels 1997 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. NO. EN 60107-8:1997 E Page 2 EN 60107-8 : 1997 Foreword The text of document 100A/31 /FDIS, future e
16、dition 1 of IEC 601 07-8, prepared by SC 1 OOA, Multimedia end-user equipment, of IEC TC 100, Audio, video and multimedia systems and equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 601 07-8 on 1997-07-01. The following dates were fixed: - latest date by w
17、hich the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1 998-04-0 1 - latest date by which the national standards conflicting with the EN have to be withdrawn (daw) 1998-04-01 Annexes designated “normative“ are part of the body of
18、 the standard. Annexes designated “informative“ are given for information only. In this standard, annex ZA is normative and annexes A and 6 are informative. Annex ZA has been added by CENELEC. Endorsement notice The text of the International Standard IEC 60107-8:1997 was approved by CENELEC as a Eur
19、opean Standard without any modification. STDOBSI BS EN bOL07-8-ENGL 1777 Lb24bb9 Ob117303 700 Page 3 EN 60107-8 1997 CONTENTS Clause 1 General 1.1 Scope and object . 1.2 Normative references . 2 Definitions . 3 Measurements 3.1 Introduction . 3.2 General conditions . 3.3 Description of test signals
20、4 Video signal measurement 4.1 Distortion measurements using test lines . 4.2 Distortion measurements not feasible with test lines . 4.3 Noise measurements . Measurement methods on the data signal . 5.1 Bit error rate . 5.3 5 5.2 Eye diagram Equivalent degradation measurement : . 5.4 Operating margi
21、n . Page 4 4 4 5 8 8 8 9 10 10 12 13 15 15 15 15 16 Tables 2 3 4 5 6 1 Definition of signal No. 1. line 312 . 17 Definition of signal No . 2. line 623 . Definition of signzl No . 3, line 624 . Definition of signal No . 4, line 31 1 . 17 18 18 19 19 Definition of signal No . 5, line 1 Definition of s
22、ignal No . 6, line 313 . Figures 1 Hypothetical reference chain notional block diagram . 2 Eye diagram for the duobinary signal 3 Test signal No . 1, line 312 4 Test signal No . 2, line 623 5 Test signal No . 3, line 624, positive polarity . 6 Test signal No . 4, line 311 . 7 Test signal No . 5, lin
23、e 1 8 Test signal No . 6, line 313 9 Rosman chart . 10 A mask for the response to a shaped step 11 Unified random noise weighting filter for D2-MAC 12 Theoretical bit error ratio as a function of S/N (unweighted 1 V/5 MHz bandwidth) . 20 21 22 23 24 25 25 26 27 28 29 30 Annexes A Relation between ba
24、seband measurements and RF measurements . 31 B Relations between subjective quality assessment and the objective measurement of parameters 43 A (normative) Normative references to international publications with their corresponding European publications 50 O BSI 1997 STD-BSI BS EN b0107-8-ENGL 2997
25、m Lb24bb7 Ob97304 847 D Page 4 EN 60107-8 : 1997 RECOMMENDED METHODS OF MEASUREMENT ON RECEIVERS FOR TELEVISION BROADCAST TRANSMISSIONS - Part 8: Measurements on Da-MAWpacket equipment 1 General 1.1 Scope and object The object of this part of IEC 60107 is to define quality parameters and to provide
26、a guideline for measurement on Da-MAC/packet equipments, under uniform and repetitive 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 cu
27、rves and references are provided which could be used as a guide for presentation 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
28、given in annex A. Relations between subjective quality assessment and objective measurement of parameters are developed in annex 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
29、 the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this part of IEC 60107 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Membe
30、rs of IEC and IS0 maintain registers of currently valid International Standards. IEC 601 07-1 : 1977, Recommended methods of measurement on receivers for television broadcast transmissions - Part 1: General considerations - Electrical measurements other than those at audio-frequencies IEC 601 07-5:
31、1992, Recommended methods of measurement on receivers for television broadcast transmissions - Part 5: Electrical measurements on multichannel sound television receivers using the NICAM two-channel digital sound-system IEC 61 079-2: 1992, Methods of measurement on receivers for satellite broadcast t
32、ransmissions in the 12 GHz band - Part 2: Electrical measurement on DBS tuner units IEC 61 079-5: 1993, Methods of measurement on receivers for satellite broadcast transmissions in the 12 GHz band - Part 5: Electrical measurements on decoder units for MAC/packet systems ITU-T Recommendation J .61: 1
33、990, Transmission performance of television circuits designed for use in international connections * rn * Page 5 EN 60107-8 : 1997 ITU-R Recommendation BT 601 -5: 1995, Encoding parameters of digital television for studios ITU-R Recommendation BO 650-2: 1992, Standards for conventional television sy
34、stems for satellite broadcasting in the channels defined by appendix 30 of the Radio Regulations EBU SPB 489: 1985, Specification of D2-MAC/packet system 2 Definitions For the purpose of this part of IEC 60107, the following definitions apply. 2.1 elements of a television system, from the picture so
35、urce to the display. hypothetical reference chain: The distribution of global tolerances between the various NOTE -The notional block diagram of such a chain is shown in figure 1 and each block is described below. 2.1.1 studio encoder: Single entity providing the D2-MAC/packet baseband signal. 2.1.2
36、 modulator: This entity modulates the baseband signal into the appropriate signal for the foreseen transmission/broadcasting system. 2.1.3 transmission/broadcasting system: The transmission/broadcasting system may be either: - a terrestrial broadcasting system; - a satellite broadcasting system; - a
37、 distribution system on coaxial support; - a distribution system on optical support. 2.1.4 receiving equipment: The receiving 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
38、, a selection-demodulation unit and a baseband output. The decoding unit comprises a baseband input, a decoding unit, and an audiovisual components output. 2.2 interfaces: Three types of interfaces can be distinguished: baseband (see also points 1, 4 and 5 of figure l), radiofrequency (see also poin
39、ts 2 and 3 of figure 1) and audiovisual component signals (see also points O, 6 and 7 of figure 1). NOTES 1 The receiving equipment interfaces are described below for a better understanding of the measurements (see points O to 7 of figure 1). a) point 3 shows the RF input from cable distribution or
40、from outdoor unit for satellite reception; b) point 5 shows the regulated baseband D2-MAClpacket output generally used for control and measurement; c) point 6 shows the output interface of a DP-MAC/packet decoder used in IEC 61079-5 for measurements on the quality of the restored picture components;
41、 Page 6 EN 60107-8 : 1997 d) point 7 shows another interface possibility which allows to use the current measurement equipment which is generally developed for measurement on Y, Cr and Cb. Unfortunately, its use requires the installation of a reference matrixing. 2 Unless otherwise specified in this
42、 standard, the measurements are assumed to be done at point 5 and the decoded signal is assumed to be observed at point 6 of figure 1. 2.3 Quality parameters for a DZ-MAC/packet signal 2.3.1 Parameters for the MAC signal 2.3.1.1 MAC analogue waveform: The MAC analogue waveform is derived directly fr
43、om the 4:2:2 standard for digital television (see ITU-R 601 -3). MAC coding consists of sequentially transmitting chrominance information compressed in a ratio of 3, and luminance information compressed in a ratio of 3/2. Based on the sampling frequencies used in 4:2:2 (13,5 MHz for luminance and 6,
44、75 MHz for chrominance), the sampling frequency in MAC is 20,25 MHz, and the nominal band is 8,4 MHz (or 5,6 MHz in luminance after decompression). 2.3.1.2 nominal signal amplitude: The difference between the white level and the black level transmitted in line 624. NOTE -The nominal amplitude of the
45、 MAC signal is 1 V. 2.3.1 -3 Distortion 2.3.1.3.1 gainfrequency response distortion: The gain variation between the circuit input and output, over the frequency range extending from the frame frequency to the nominal system cut-off frequency, relative to the gain at an appropriate reference frequenc
46、y. 2.3.1.3.2 phase distortion: The difference in degrees relative to the linear phase characteristic over a frequency band extending from, ideally, O Hz to a defined upper frequency. 2.3.1.3.3 group delay time distortion: The difference between the group delay time for each frequency and the group d
47、elay 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 component, or vice versa, is applied to a circuit input, long time distortion appears if clamping level variations (medium g
48、rey 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 dampened oscillatory form at very low frequency. 2.3.1.3.5 distortion of duration of the order of one frame: When a test signa
49、l simulating a variation of the luminance component from black to white with a period of the same order as the frame duration (40 ms), 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 line: When a test signal simulating a variation of the black to white luminance component, with a period of the same order as the line duration, is applied to the ci
