इंटरनेट मानक Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. “जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न’ 5 तरफ” Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru “The Right to Information, The Right to Live” “Step Out From the Old to the New” IS 14231-9 (2002): Cabled Distribution Systems for Television and Sound Signals, Part 9: Interfaces of Cabled Distribution Systems for Digitally Modulated Signals [LITD 7: Audio, Video and Multimedia Systems and Equipment] “!ान $ एक न’ भारत का +नम-ण” Satyanarayan Gangaram Pitroda ““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee”” “!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै” Bhartṛhari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” _.—,....— IS 14231 (Part 9) :2002 IEC 60728-9(2000) mm Indian Standard CABLED DISTRIBUTION SYSTEMS FOR TELEVISION AND SOUND SIGNALS PART 9 INTERFACES OF CABLED DISTRIBUTION SYSTEMS FOR DIGITALLY MODULATED SIGNALS ICS 33.040 .40:33.060.40:35.1 10 @BIS 2002 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 December 2002 Price Group 13 \\ .- Radiocommunication Sectional Committee, LTD 20 ——. NATIONAL FOREWORD This Indian Standard (Part 9) which isidentical with IEC 60728-9 (2000) ’Cabled distributionsystems for television and sound signals— PartXl: Interfaces of cabled distribution systems for digitally modulated signals’ issued by the International Electrotechnical Commission (lEC) was adopted by the Bureau of Indian Standards onthe recommendation ofthe Radiocomrnunication Sectional Committee and approval ofthe Electronics and Telecommunication Division Council. Inthisadopted standard, certain conventions are notidenticaltothoke used inIndian Standards. Attention isparticularly drawn to the following: a) Wherever the words ‘International Standard’ appear referring to this standard, they should be read as ‘Indian Standard’. b) Comma (,) has been usedasadecimal marker whileinIndianStandards, the current practice isto use a point (.) as the decimal marker. CROSS REFERENCES In this adopted standard, reference appears to the following International Standard for which Indian Standard also exists.The corresponding Indian Standard which isto be substituted initsplace islisted below along with itsdegree of equivalence forthe edition indicated: International Standard Corresponding Indian Standard Degree of Equivalence IEC 60728-5 Cabled distribution IS 14231 (Part 5):1995 Cabled distribution Technically systems for television and systems fortelevision and sound signals : equivalent sound signals— Part 5 : Head- Part 5 Headend end equipment The concerned Technical Committee responsible forthe preparation ofthis standard has reviewed the provisions ofthe following International Publications and has decided that they are acceptable for use in conjunction with this standard: IEC 60169-8:(1 978) Radio-frequency connectors — Part 8: RF coaxial connectors with inner diameter of outer conductor 6.5 mm (0,256 in) with bayonet lock— Characteristic impedance 50 ohms (type BNC) IEC 60728-6 Cabled distributionsystems fortelevisionand soundsignals~ Part6: Optical equipment IEC 60793-2:(1 998) Optical fibres— Part 2: Product specifications IEC 60874-1 4:(1993) Connectors foroptical fibres and cables— Part 14: Sectional specification forfibre opticconnector—-Type SC lSO/lEC 13818-1:1996 Information technology — Generic codingofmovingpictures and associated audio information— Part 1: Systems lSO/iEC 13818-9:” 996 Information technology —Generic codingofmovingpicturesand associated audio information— Part 9: Extension for real time interface for systems decoders lSO/lEC 14165-11 Information technology— Fibre Channel — Part 1: Physical and signaling interface (FC-PH) ISO 2110:1989 Information technology — Data communication 25 pole DTE/DCE interface connector and contact number assignments (Continued on third cover) -. ....- ..— IS 14231 (Part9):2002 IEC 60728-9(2000) Indian Standard — CABLED DISTRIBUTION SYSTEMS FOR TELEVISION AND SOUND SIGNALS PART 9 INTERFACES OF CABLED DISTRIBUTION SYSTEMS FOR DIGITALLY MODULATED SIGNALS 1 Scope This part of IEC 60728 describes physical interfaces for the interconnection of signal processing devices for professional CATV/SMATV headend equipment or for similar systems, such as in up-link stations. This standard, in particular, specifies the transfer of MPEG-2 data signals in the standardized transport layer format between devices of different signal processing functions. RF interfaces and interfaces to telecom networks are not covered by this standard. In addition referenc~s are made to all other parts of the IEC 60728 series and, in particular, for RF, video and audio interfaces, to IEC 60728-5. For connections to telecom networks, special Data Communication Equipment (DCE) is necessary to adapt the serial or parallel interfaces specified in this document to the bitrates and transmission formats of the public Plesiochronic Digital Hierarchy (PDH) networks. Other emerging technologies such as Connectionless Broadband Data Services (CBDS), Synchronous Digital Hierarchy (SDH), Asynchronous Transfer Mode (ATM), etc. can be used for transmitting MPEG-2 Transport Streams (TS) between remote locations. ATM is particularly suitable for providing bandwidth on demand and it allows for high data rates. 2 Normativereferences The following normative do cuments contain provisions which, through reference in this text, constitute provisions of thi s Dart of IEC 60728. For dated references. subsequent amendments to, or revisions of, ‘any of these publications do not apply. However, parties to agreements based on this part of IEC 60728 are encouraged to investigate the possibility of applying the most recent editio’ns of the normative documents indicated below: For undated references, the latest edition of the normative document referred to applies. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 60169-8:1978, Radio-frequency connectors - Part 8: RF coaxial connectors with inner diameter of outer conductor 6,5 mm (0,256 in) with bayonet lock - Characteristic impedance 50 ohms (type BNC) IEC 60728 (ail parts), Cab/cd distribution systems for television and sound signs/s IEC 60728-5,— Cabled distribution systems for television and sound signals - Part 5: Head-end equipment 1J IEC 60728-6,— Cabled distribution systems for television and sound signals - Part 6: Optical equipment 1) IEC 60793-2:1998, Optical fibres - Part 2: Product specifications I) To be published. 1 \ .. . ..— IS 14231 (Part 9):2002 IEC 60728-9(2000) 1EC 60874-14:1993, Connectors for optics/ fibres and cab/es - Part 14: Sectional —— specifics tion for fibre optic connector - Type SC lSO/lEC 13818-1:1996, /nforrnation technology - Generic coding of moving pictures and associated audio information - Part 1: Systems lSO/lEC 13818-9:1996, /formation technology - Generic coding of moving pictures and associated audio inform-ation - Part 9: Extension for real time interface for systems decoders 1S0/1EC 14165-111, /formation technology - Fibre Channel - Part 1: Physical and signaling interface (FC-PH)l J ISO 2110:1989, Information technology - Data communication - 25-pole DTE\DCE interface connector and contact number assignments ITU-R Recommendation BT.656-4: 1994, /nterfaces for digits/ component video signs/s in 525-line and 625-line television systems operating at the 4:2:2 level of Recommendation ITU-RBT.601 (Part A) ITU-T Recommendation G.654: 1997, Characteristics of a cut-off shifted sing/e-mode optics/ fibre cable (Rev 1) ITU-T Recommendation G.703:1 998, Physics/)e/ectrica/ characteristics of hierarchic/ digits/ interfaces (Rev 1) ETS 300421:1994, Digital broadcasting for television, sound and data services - Framing structure, channel coding and modulation for 11/12 GHz satellite services ETS 300429:1994, Digital broadcasting for television, sound and data services - Framing structure, channel coding and modulation for cable systems 3 Terms, definitions and abbreviations 3.1 Terms and definitions For the purposes of this part of IEC 60728, the following definitions apply. 3.1.1 head-end equipment connected between receiving antennas or other signal sources and the remainder of the cable distribution system to process the signals to be distributed NOTE The head-end may, for example, comprise antenna amplifiers, frequency conveners, combiners, eelectors and generators. 3.1.2 Satellite Master Antenna Television system (SMATV) system-designed to provide sound and television signals to the households of a building or group of buildings NOTE Two system configurations are defined in ETS 300473 as follows: l SMATV system A, based on transparent transmodulation of QPSK satellite signals into QAM signals to be distributed to the use~ l SMATV system B, based on direct distribution of QPSK signals to the user, with two options: SMATV-IF distribution in the satellite IF band (above 950 MHz); SMATV-S distribution in the VHFIUHF band, for example in the extended S-band (230-470 MHz). 1j To be published. ~?’: ..,. IS 14231 (Part 9) :2002 i$ke! IEC 60728-9 (2000) 3.1.3 !%= biphase mark line code which ensures DC balance, easy clock recovery and polarity freedom *.+; 3.1.4 transport stream includes one or more programs with one or more independent time bases into a single ~’ stream. The transport stream is designed for use in environments where errors are likely.,. such as storage or transmission in Ios;y or noisy media 3.1.5 transport packet packetized element of the transport stream. The packets are either 188 bytes or, in the case where Reed Solomon FEC is used, 204 bytes jn length 3.1.6 DVALID signal which indicates in the 204-byte mode of a Transport Stream that the empty space is filled with dummy bytes 3.1.7 PSYNC flag which indicates the beginning of a packet .!.. ill i ,. .,.,.- 3 ‘1 I IS 14231 (Part 9) :2002 IEC 60728-9 (2000) 3.2 Abbreviations 8BI1OB eight-to-ten bit conversion ACCP Accumulated Phase ACCT Accumulated Time ASI Asynchronous Serial Interface ASI-C Asynchronous Serial Interface on coaxial cable ASI-O Asynchronous Serial Interface on optical fibre ATM Asynchronous Transfer Mode BER Bit Error Rate CBDS Connectionless Broadband Data Services DFB Distributed Feedback DJ Deterministic Jitter DVALID data valid DVB Digital Video Broadcast EN European Norm FC Fibre Channel FIFO First In First Out FEC Forward Error Correction FWHM Full Width Half Max IEC International Electrotechnical Commission 1s0 International Organization for Standardization ITU-R International Telecommunication Union – Radiocommunication ITU-T International Telecommunication Union - Telecommunication LVDS Low-Voltage Differential Signaling MPEG Moving Picture Experts Group MSB Most Significant Bit MUX Multiplex J! - NA not applicable NRZ Non-Return-to-Zero k-“-- PDH Plesiosynchronic Digital Hierarchy PLL Phase Loc k Loop PMD Physical Medium Dependent PSYNC Packet Synchron QAM Quadrature Amplitude Modulation QPSK Quarternary Phase Shift Keying RD Running Disparity RIN Relative Intrinsic Noise RJ Random Jitter RS Reed Solomon SDH Synchronous Digital Hierarchy SMPT Society of Motion Picture and Television Engineers SPI Synchronous Parallel Interface Ssl Synchronous Serial Interface Ssl-c Synchronous Serial Interface on coaxial cable Ssl-o Synchronous Serial Interface on optical fibre Tr Rise-time TS Transport Stream UNC Unified National Coarse Thread I 4 ‘1 I ----- IS 14231 (Part 9) :2002 IEC 60728-9 (2000) — 4 Interfaces for MPEG-2 data signals 4.1 Introduction This subclause describes possible interfaces for devices transmitting or receiving MPEG-2 data as transport packets, such as QPSK demodulators, QAM modulators, multiplexer, demultiplexers, or telecom network adapters. This specification is similar to ETS 300429 and ETS 300421. NOTE Both standards describe a first functional block representing the MPEG2 source coding and multiplexing as standardized in lSO/l EC 13818-1, a second functional block representing the channel adaptation, whereas an interface in between shall be based on MPEG2 transport stream specification according to lSO/l EC 13818-1. The function of the channel modulator/demodulator is to adapt the signal to the characteristics of the transmission channel: satellite, terrestrial or cable as specified in the DVB base line documents. Also the case where data signals are transmitted to or from a headend via a telecom network, or if a headend serves to insert data signals into such networks, is considered to be covered by the generic channel modulator/demodulator functional block. The interface parameters valid for this network have to be met. For the latter, reference is made to ITU-T G.703 for Plesiochronic Digital Hierarchy (PDH) networks. 4.1.1 Application requirements In order to avoid any unnecessary processing at the transmitting or receiving station of an interface in certain applications, it is considered an application requirement that the interface supports 204-byte packet length in such cases, in addition to or instead of the 188-byte packet length specified in lSO/lEC 13818-1. These two cases are identified in the protocol diagrams of figures 1 and 2, where also the scope of this specification is delineated. The relevant associated packet structures are illustrated in figures 3 and 4. m 1 I } ( Figure 1 - Protocol stack for 188-byte packets Figure 2- Protocol stack for 204-byte packets NOTE Shaded areas identify the scope of this standard. I 5 \