1、ETSI TS 101 964 1.1.1 (2001-08) Technical Specificafion Digital Video Broadcasting (DVB); Control Channel for SMATWMATV distribution systems; Baseline Specification 2 ETSI TS 101 964V1.1.1 (2001-08) Reference DTS/JTC-DVB-118 Keywords broadcasting, control, digital, DVB, SMATV, video ETSI 650 Route d
2、es Lucioles F-O6921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 O0 Fax: +33 4 93 65 47 16 Siret No 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-prfecture de Grasse (06) No 7803/88 Important notice Individual copies of the present document can be downloaded f
3、rom: http:/w.etsi.orq The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be
4、 the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available
5、at http:ii.etsi.orci/iblstaius/ If you find errors in the present document, send your comment to: editoreisi .ir Copyright Notifica tion No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. O European T
6、elecommunications Standards Institute 2001. O European Broadcasting Union 2001. All rights reserved. ETSI 3 ETSI TS 101 964V1.1.1 (2001-08) Contents Intellectual Property Rights . .4 Introduction . .4 Foreword . 4 1 2 3 4 4.1 4.2 4.3 5 5.1 5.la 5.2 5.3 5.3.1 5.4 5.5 5.6 5.7 5.8 5.9 5.10 5.11 5.12 5.
7、13 Scope 6 References . .6 Abbreviations .6 Message structure .7 . 7 . 7 . 8 General Framing byte . Address byte List of commands and coding 9 . . . . . . . . system-descriptor . . Installation Status Request . Configuration . Maintenance . Resource Inquiry . . Message Fragmentation. . Command Reply
8、 (ACK) Installation Status Reply. . Configuration Reply Maintenance Reply Resource Reply . Annex A (normative): A. 1 A. 1.1 Main characteristics . A. 1.2 Multiaccess via the 22 kHz bus . A. 1.2.1 Timing . A.2 21 A.2.1 Main characteristics . . 21 A.2.2 Multiaccess via the RF bus . 22 A.2.3 Optional F
9、requency Extension . History .23 Physical layers . 19 .20 .20 Physical layer based on a 22 kHz bus . .19 Physical layer based on a RF bus .2 1 . ETSI 4 ETSI TS 101 964V1.1.1 (2001-08) Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared
10、to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR O00 3 14: “Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notijied to ETSI in respect of ETSI standards“, which is
11、available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (-). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR O00 3 14 (or th
12、e updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This Technical Specification (TS) has been produced by Joint Technical Committee (JTC) of the European Broadcasting Union (EBU), Comit Europen de Normalisation Electrotechnique (CENELEC
13、) and the European Telecommunications Standards Institute (ETSI). NOTE: The EBU/ETSI JTC Broadcast was established in 1990 to Co-ordinate the drafting of standards in the specific field of broadcasting and related fields. Since 1995 the JTC Broadcast became a tripartite body by including in the Memo
14、randum of Understanding also CENELEC, which is responsible for the standardization of radio and television receivers. The EBU is a professional association of broadcasting organizations whose work includes the Co-ordination of its members activities in the technical, legal, programme-making and prog
15、ramme-exchange domains. The EBU has active members in about 60 countries in the European broadcasting area; its headquarters is in Geneva. European Broadcasting Union CH-I218 GRAND SACONNEX (Geneva) Switzerland Tel: +41 22 717 21 11 Fax: +41 22 717 24 81 Founded in September 1993, the DVB Project is
16、 a market-led consortium of public and private sector organizations in the television industry. Its aim is to establish the framework for the introduction of MPEG-2 based digital television services. Now comprising over 200 organizations from more than 25 countries around the world, DVB fosters mark
17、et-led systems, which meet the real needs, and economic circumstances, of the consumer electronics and the broadcast industry. I n t rod uct ion SMATVMATV distribution systems, as described in EN 300 473 i, represent a solution widely adopted for in-building delivery of DVB signals (both satellite a
18、nd terrestrial) through collective installations. The adoption of the Control Channel specification, which has been defined in accordance with the commercial requirements given in DVB-TM 2342 7, offers an alternative cost-effective solution to the current implementation of SMATVMATV systems, especia
19、lly for the case of small and medium size installations, allowing the delivery of DVB TSs/multiplexes without the constraints of the limited bandwidth available in the installation. These benefits are achieved by allocating to each users terminal an individual RF channel on the in-building cable net
20、work for the delivery of the DVB services which are remotely selected by the users terminal controlling the head-end device, installed in the building (e.g. QPSWQAM transmodulator, QPSWQPSK frequency converter), via a suitable set of commands. All the equipment which is operated via the Control Chan
21、nel, i.e. the head-end devices and the users terminals, are connected through the same coaxial SMATV/MATV installation. Furthermore, the Control Channel allows each single user of the building to autonomously decide on the possibility of receiving digital broadcasting services through the community
22、installation, without the need of authorization from the other users. ETSI 5 ETSI TS 101 964V1.1.1 (2001-08) The system model representing this solution is based on two channels (see figure 1): Broadcast Channel: a unidirectional broadband delivery channel for video, audio and data services; Control
23、 Channel: a bi-directional narrow-band channel established between the head-end device and the users terminal for control and signalling purposes. The present document describes the message structure and the set of commands and coding used by the Control Channel for SMATVMATV distribution systems. T
24、he specification covers both the approaches adopted for the delivery of satellite signals as identified in EN 300 473 i, i.e. transmodulation from QPSK to QAM (System A) and direct distribution in QPSK after frequency conversion (System B), as well as the remote control of other head-end devices for
25、 broadcast services. The specification also takes into account the requirements from DVB-TM 2342 7 in order to achieve the best commonality and ensure the minimum functionality required for operating via the SMATV systems the satellite interactive terminals. Although primarily focused on SMATV syste
26、ms for delivery of satellite DVB services, the Control Channel shall also be applicable to MATV systems currently used for terrestrial broadcasting services via VHFLJHF and microwave. The Control Channel protocol is based on DiSEqC 2 to maintain compatibility with existing products and has the furth
27、er advantage of being sufficiently flexible to allow for future extensions, if and when needed. The structure of the Control Channel message ensures a robust transmission mechanism. The Physical layers, described in clauses A. 1 and A.2, allow for a general use of the Control Channel in the whole ra
28、nge of SMATVMATV distribution systems, having different topologies and characteristics. The transmission protocol providing the communication link between the users terminal and the head-end device makes use of the same commands and coding (see clauses 4 and 5) for both physical layers. The A. 1 sol
29、ution, which is based on the use of a 22 kHz bus, is suitable for the case of small SMATVIMATV installations using d.c. coupled elements. The A.2 solution, which is based on the use of an RF bus in a frequency range above 10 MHz, provides the capability to pass through community installations using
30、inductive components. So, this second solution potentially allows for a transparent introduction of the Control Channel in most existing SMATVMATV systems. Head-end device Control Channel (Narrow-band carrier) Broadcast Channel User-allocated RF Channel (e.g. 8 MHz) v Coiiirol Cliniiiicl Iiiicrliicc
31、 Set-Tp-Box Figure 1 : Simplified functional block diagram of the in-building SMATVIMATV System using a Control Channel ETSI 6 ETSI TS 101 964V1.1.1 (2001-08) 1 Scope The present document specifies the Control Channel for SMATVIMATV distribution systems based on EN 300 743. The present document is i
32、ntended to provide remote control of the head-end device from the users terminal through a set of commands in a closed in-building environment for the delivery of broadcast services. Provision for interactive services is out of the scope of the present document. 2 Refe re nces The following document
33、s contain provisions which, through reference in this text, constitute provisions of the present document. References are either specific (identified by date of publication andor edition number or version number) or non-specific. For a specific reference, subsequent revisions do not apply. For a non
34、-specific reference, the latest version applies. il ETSI EN 300 473 : “Digital Video Broadcasting (DVB); Satellite Master Antenna Television (SMATV) distribution systems“. ETSI EN 301 790: “Digital Video Broadcasting (DVB); Interaction channel for satellite distribution systems“. 21 31 Eutelsat: “Di
35、gital Satellite Equipment Control (DiSEqC) Bus Functional Specification version 4.2, February 1998“. ETSI EN 300 421: “Digital Video Broadcasting (DVB); Framing structure, channel coding and modulation for 11112 GHz satellite services“. 41 51 ETSI EN 300 429: “Digital Video Broadcasting (DVB); Frami
36、ng structure, channel coding and modulation for cable systems“. 61 ETSI EN 300 744: “Digital Video Broadcasting (DVB); Framing structure, channel coding and modulation for digital terrestrial television“. DVB-TM 2342: “Commercial Requirements for the addition of a Control Channel to the SMATVIMATV d
37、istribution systems“. 71 3 Abbreviations For the purposes of the present document the following abbreviations apply: ACK CRC DiSEqC FDMA FEC HE HED HP IDU IF LP MATV MID ODU OFDM DVB-TS ACKnowledge Cyclic Redundancy Check Digital Satellite Equipment Control Digital Video Broadcasting-Transport Strea
38、m Frequency Division Multiple Access Forward Error Correction Head End Head End Device High Priority InDoor Unit Intermediate Frequency Low Priority Master Antenna TV Master IDentifier OutDoor Unit Orthogonal Frequency Division Multiplexing ETSI 7 ETSI TS 101 964V1.1.1 (2001-08) PIN PWK QPSK RF RS S
39、ID SMATV STB TDMA UHF VHF QAM Personal Identification Number Pulse Width Keying Quadrature Amplitude Modulation Quaternary Phase Shift Keying Radio Frequency Reed-Solomon Slave IDentifier Satellite Master Antenna TV Set Top Box Time Division Multiple Access Ultra High Frequency Very High Frequency 4
40、 Message structure 4.1 General The structure of the Control Channel messages is shown in figure 2. . . Figure 2: Message structure The RUN-IN bytes are used to provide a reliable reception of messages with large variation in signal level. The value of this 3-byte field is “55 55 OD“ (hex. notation).
41、 The CRC (Cyclic Redundancy Check) field is 2 bytes long and is based on the following polynomial generator: CRC = X16 + X12 + X9 + X5 + X + 1 If the message bytes are less than 32, the CRC will be calculated as if the missing bytes were all 0x00. In case of the 22 kHz bus (see clause A. i), the mes
42、sage structure does not include the RUN-IN and may not include the CRC bytes. Error protection is currently provided by an Odd Parity bit after each byte according to the DiSEqC specification 2. If required, the first DATA byte after the COMMAND byte should be used to speciSl the length of the messa
43、ge. The ADDRESS and COMMAND bytes are not necessarily used in the reply message from the Head-end device to the user terminal. The maximum length of the message shall be 32 bytes, excluding RUN-IN and CRC. In case of messages longer than 32 bytes they are fragmented into segments of 32 bytes each, u
44、sing the fragmentation command defined in clause 5.8. 4.2 Framing byte The Framing byte is used to define the nature of the communication protocol (one or two way) and reply mechanism required (table 1). The user terminal is called “Master“ and the corresponding device at the Head-end is called “Sla
45、ve“ ETSI 8 ETSI TS 101 964V1.1.1 (2001-08) Framing byte Function Command from Master, No Reply required, First transmission. Command from Master, No Reply required, Repeated transmission. Command from Master, Reply required, First transmission. Command from Master, Table 1: Values for the Framing by
46、te Value OxEO OxEl OxE2 OxE3 Reply required, Repeated transmission. “OK“ Reply from Slave, No errors detected. Error Reply from Slave - Repeat of message is not required. OxE4 OxE5 4.3 Address byte The Address byte is used to identiSl the different device types for the Head-End unit (slave). Address
47、 type All SMATV Head-end devices QPSWQAM transmodulator QAM/QAM frequency converter QPSWQPSK IF-IF converter OFDM/QAM transmodulator Reserved Value 0x70 0x7 1 0x72 0x73 0x74 0x75 tn 0x7F IReserved for future exDansion 1Ox7F I ETSI 9 ETSI TS 101 964V1.1.1 (2001-08) Command Reset Stand-by Tuning (rese
48、rved) Installation Status Reauest 5 Command Byte Di recti on (hex) STB Head-End device ox00 0x02 0x70 to 0x72 0x73 0x74 List of commands and coding Resource Inquiry (reserved) Message Fragmentation 5.1 General Ox7A Ox7B to Ox7E Ox7F The list of relevant commands for the Control Channel is based on D
49、iSEqC and is given in table 3. The commands in the range Ox01 and 0x03 to Ox6F, which are standard DiSEqC commands and are used in solutions adopting the 22 kHz bus (see clause A.l), are not reported in table 3 for sake of simplicity, and can be found in 2 and 6. These commands may also be used with the RF bus (see clause A.2). Note that the five Reply messages of table 3 from the Head-End to the user terminal do not have a specific Command byte (see clause 4. i), but are identified by the Framing byte as defined in table 1. Command Reply (ACK)
