1、 I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n ITU-T J.94 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Amendment 3 (03/2016) SERIES J: CABLE NETWORKS AND TRANSMISSION OF TELEVISION, SOUND PROGRAMME AND OTHER MULTIMEDIA SIGNALS Ancillary digital services for television tran
2、smission Service information for digital broadcasting in cable television systems Amendment 3: Revised Annex C Service information for digital multi-programme System C Recommendation ITU-T J.94 (1998) Amendment 3 Rec. ITU-T J.94 (1998)/Amd.3 (03/2016) i Recommendation ITU-T J.94 Service information
3、for digital broadcasting in cable television systems Amendment 3 Revised Annex C Service information for digital multi-programme System C Summary Amendment 3 to Recommendation ITU-T J.94 (1998) revises Annex C. This amendment enhances the functionality of the transmission scheme of Annex C of Recomm
4、endation ITU-T J.83 to support channel bonding as well as transport of type length value (TLV) packets. History Edition Recommendation Approval Study Group Unique ID* 1.0 ITU-T J.94 1998-11-19 9 11.1002/1000/4346 1.1 ITU-T J.94 (1998) Amd. 1 2000-10-06 9 11.1002/1000/5167 1.2 ITU-T J.94 (1998) Amd.
5、2 2001-03-09 9 11.1002/1000/5377 1.3 ITU-T J.94 (1998) Amd. 3 2016-03-15 9 11.1002/1000/12763 * To access the Recommendation, type the URL http:/handle.itu.int/ in the address field of your web browser, followed by the Recommendations unique ID. For example, http:/handle.itu.int/11.1002/1000/11830-e
6、n. ii Rec. ITU-T J.94 (1998)/Amd.3 (03/2016) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanen
7、t organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes
8、 the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards
9、 are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommen
10、dation may contain certain mandatory provisions (to ensure, e.g., interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligatory language such as “must“ and the negative equivalents are
11、used to express requirements. The use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTSITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intell
12、ectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not receive
13、d notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/.
14、 ITU 2016 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T J.94 (1998)/Amd.3 (03/2016) iii Table of Contents Page 1) Clause 2, References . 1 2) Clause 4, Abbreviations and acronyms 1 3) Annex C 1 Ann
15、ex C Service information for digital multi-programme System C . 1 C.1 SI tables 1 C.2 Descriptor . 3 C.3 Character code tables 8 Rec. ITU-T J.94 (1998)/Amd.3 (03/2016) 1 Recommendation ITU-T J.94 Service information for digital broadcasting in cable television systems Amendment 3 Revised Annex C Ser
16、vice information for digital multi-programme System C 1) Clause 2, References Add the following entry: ITU-T J.183 Recommendation ITU-T J.183 (2016), Time-division multiplexing of multiple MPEG-2 transport streams over cable television systems. 2) Clause 4, Abbreviations and acronyms Add the followi
17、ng entry: TLV Type Length Value 3) Annex C Modify Annex C as shown below: Annex C Service information for digital multi-programme System C C.1 SI tables The specifications for SI tables are fully aligned with those in Annex A both in table names and in their function. See Table C.1. Table C.1/J.94 S
18、I tables and their function Table Function Program Association Table (PAT) For each service in the multiplex, the PAT indicates the location (the PID values of the Transport Stream packets) of the corresponding Program Map Table (PMT). It also gives the location of the Network Information Table (NIT
19、). Conditional Access Table (CAT) The CAT provides information on the Conditional Access (CA) systems used in the multiplex; the information is private (not defined within ITU-T H.222.0 | ISO/IEC 13818-1) and dependent on the CA system, but includes the location of the EMM stream, when applicable. P
20、rogram Map Table (PMT) The PMT identifies and indicates the locations of the streams that make up each service, and the location of the Program Clock Reference fields for a service. 2 Rec. ITU-T J.94 (1998)/Amd.3 (03/2016) Table C.1/J.94 SI tables and their function Table Function Network Informatio
21、n Table (NIT) The location of the NIT is defined in ITU-T H.222.0 | ISO/IEC 13818-1, but the data format is outside the scope of ITU-T H.222.0 | ISO/IEC 13818-1. It is intended to provide information about the physical network. The syntax and semantics of the NIT are defined in this Recommendation.
22、Bouquet Association Table (BAT) The BAT provides information regarding bouquets. As well as giving the name of the bouquet, it provides a list of services for each bouquet. Service Description Table (SDT) The SDT contains data describing the services in the system, e.g., names of services, the servi
23、ce provider, etc. Network Information Table for type length value (TLV-NIT) It is intended to provide information about the physical network when the signal is transmitted by TLV packets streams. The syntax and semantics of the TLV-NIT are defined in this Recommendation. Event Information Table (EIT
24、) The EIT contains data concerning events or programs such as event name, start time, duration, etc.; the use of different descriptors allows the transmission of different kinds of event information, e.g., for different service types. Running Status Table (RST) The RST gives the status of an event (
25、running/not running). The RST updates this information and allows timely automatic switching to events. Time and Date Table (TDT) The TDT gives information relating to present time and date. This information is given in a separate table due to the frequent updating of the time information. Stuffing
26、Table (ST) The ST is used to invalidate existing sections, for example at delivery system boundaries. The PID allocation for SI and the allocation of table_id values are as shown in Tables C.2 and C.3, which are the same as those in Tables A.1 and A.2. Table C.2/J.94 PID allocation for SI Table PID
27、value PAT 0x0000 CAT 0x0001 NIT, ST 0x0010 SDT, BAT, ST 0x0011 EIT, ST 0x0012 RST, ST 0x0013 TDT 0x0014 NULL 0x1FFF Rec. ITU-T J.94 (1998)/Amd.3 (03/2016) 3 Table C.3/J.94 Allocation of table_id values Value Table and description 0x00 PAT 0x01 CAT 0x02 PMT 0x40 NIT, network_information_section-actua
28、l_network or TLV-NIT, network_information_actual_network 0x41 NIT, network_information_section-other_network or TLV-NIT, network_information_other_network 0x42 SDT, service_description_section-actual_transport_stream 0x46 SDT, service_description_section-other_transport_stream 0x4A BAT 0x4E EIT, eve
29、nt_information_section-actual_transport_stream, present/following 0x4F EIT, event_information_section-other_transport_stream, present/following 0x50 to 0x5F EIT, event_information_section-actual_transport_stream, before 8th day EIT, event_information_section-actual_transport_stream, on or after 8th
30、day 0x60 to 0x6F EIT, event_information_section-other_transport_stream, before 8th day EIT, event_information_section-other_transport_stream, on or after 8th day 0x70 TDT, time_date_section 0x71 RST, running_status_section 0x72 ST, stuffing_section 0x82 to 0x85 Reserved for conditional access system
31、 0x90 to 0xBF Selectable as operator setting table_id C.2 Descriptor C.2.1 Location and tag value The location and tag value of each descriptor are as shown in Table C.4. The description, data structure, and syntax of each descriptor are the same as those in Table A.12. However, the coding of the da
32、ta field of each descriptor is not specified. 4 Rec. ITU-T J.94 (1998)/Amd.3 (03/2016) Table C.4/J.94 Possible locations of descriptors Descriptor Tag value NIT BAT SDT EIT PMT CAT TLV-NIT CA_descriptor 0x09 * * network_name_descriptor 0x40 * stuffing_descriptor 0x42 * * * * cable_delivery_system_de
33、scriptor 0x44 * channel_bonding_cable_delivery_system_descriptor T.B.D. * bouquet_name_descriptor 0x47 * * service_descriptor 0x48 * linkage_descriptor 0x4A * * * * NVOD_reference_descriptor 0x4B * time_shifted_service_descriptor 0x4C * short_event_descriptor 0x4D * extended_event_descriptor 0x4E *
34、time_shifted_event_descriptor 0x4F * component_descriptor 0x50 * mosaic_descriptor 0x51 * * stream_identifier_descriptor 0x52 * content_descriptor 0x54 * parental_rating_descriptor 0x55 * User-defined 0x80 to 0xBF channel_bonding_cable_delivery_system_descriptor 0xF3 * * Forbidden 0xFF Table C.4/J.9
35、4 Possible locations of descriptors (concluded) Descriptor Tag value NIT BAT SDT EIT PMT CAT area_specified_service_descriptor 0x96 * * data_coding_method_descriptor 0xFD * * Possible location Descriptors which are used in Japan but not specified in Annex A are detailed in the following clauses. C.2
36、.2 CA descriptor The CA descriptor which is described in CAT and PMT identifies the type of conditional access and also identifies the PID in TS packet that carries the information related to conditional access. Conditional access is only available when this descriptor is used. See Table C.5. Rec. I
37、TU-T J.94 (1998)/Amd.3 (03/2016) 5 Table C.5/J.94 CA descriptor Syntax Bits Identifier Note CA_descriptor() descriptor_tag 8 uimsbf descriptor_length 8 uimsbf CA_system_id 16 uimsbf reserved 3 bslbf “111“ CA_PID 13 uimsbf for (i = 0; i N; i+) private_data 8xN bslbf C.2.3 Area specified service descr
38、iptor This descriptor is used to render the services to the specified part within a given service area by transmitting either the area list of the service reception area or the one beyond the service reception area (see Table C.6). Area specified service is only available when this descriptor is use
39、d. Table C.6/J.94 Area specified service descriptor Syntax Bits Identifier Note area_specified_service _descriptor() descriptor_tag 8 uimsbf descriptor_length 8 uimsbf descriptor_flag 1 bslbf (1: available, 0: not available) reserved 7 bslbf for (i = 0; i N; i+) area_code 24 bslbf alphanumeric 3 cha
40、racters C.2.4 Data coding method descriptor The data coding method descriptor which is described in PMT identifies the data coding method for data broadcasting services. See Table C.7. Table C.7/J.94 Data coding method descriptor Syntax Bits Identifier Note data_coding_method_descriptor() descriptor
41、_tag 8 uimsbf descriptor_length 8 uimsbf data_component_id 16 uimsbf for (i = 0; i N; i+) additional_identification_information 8xN bslbf 6 Rec. ITU-T J.94 (1998)/Amd.3 (03/2016) C.2.5 Cable delivery system descriptor This descriptor which is described in NIT identifies the physical conditions of th
42、e cable channel. See Table C.8. Table C.8/J.94 Cable delivery system descriptor Syntax No. of bits Identifier cable_delivery_system_descriptor() descriptor_tag 8 uimsbf descriptor_length 8 uimsbf Frequency 32 bslbf reserved_future_use 8 bslbf frame_type 4 bslbf FEC_outer 4 bslbf Modulation 8 bslbf s
43、ymbol_rate 28 bslbf FEC_inner 4 bslbf Semantics for cable delivery system descriptor frequency: The frequency is a 32-bit field giving the 4-bit BCD values specifying 8 characters of the frequency value. For the cable_delivery_system_descriptor, the frequency is coded in MHz, where the decimal occur
44、s after the fourth character (e.g., 0312.0000 MHz). frame_type: The frame_type is a 4-bit field specifying the frame type according to Table C.9. The frame type indicates the number of slots in the TSMF, N, and the maximum number of TSs or data streams with specific PID transmitted simultaneously, M
45、 if the TSMF is used. The values of N and M should be identical to those in the ITU-T J.183. Table C.9/J.94 Frame type frame_type bit 3210 Description 0000 Reserved for future use 0001 (N, M) = (53, 15)a) TSMF is for both single channel and/or channel bonding functionality. 0010 (N, M) = (53, 15)a)
46、Used for channel bonding functionality 0011 to 1110 Reserved for future use 1111 None indicates that the waveform does not use TSMF a) The frame type (N, M) is (53,15) for Annex C. It might be determined for other transmission systems. FEC_outer: The FEC_outer is a 4-bit field specifying the outer F
47、orward Error Correction (FEC) scheme used according to Table C.10. Rec. ITU-T J.94 (1998)/Amd.3 (03/2016) 7 Table C.10/J.94 Outer FEC scheme FEC_outer bit 3210 Description 0000 Not defined 0001 No outer FEC coding 0010 RS(204/188) 0011 to 1111 Reserved for future use modulation: This is an 8-bit fie
48、ld. It specifies the modulation scheme used on a cable delivery system according to Table C.11. Table C.11/J.94 Modulation scheme for cable Modulation (hex) Description 0x00 Not defined 0x01 16-QAM 0x02 32-QAM 0x03 64-QAM 0x04 128-QAM 0x05 256-QAM 0x06 to 0xFF Reserved for future use symbol_rate: Th
49、e symbol_rate is a 28-bit field giving the 4-bit BCD values specifying 7 characters of the symbol_rate in Msymbol/s where the decimal point occurs after the third character (e.g., 027.4500). FEC_inner: The FEC_inner is a 4-bit field specifying the inner FEC scheme used according to Table C.12. Table C.12/J.94 Inner FEC scheme FEC_inner bit 3210 Description 0000 Not defined 0001 1/2 conv. code rate 0010 2/3 conv. code rate 0011 3/4 conv. code rate 0
