1、 Recommendation ITU-R BT.1306-7 (06/2015) Error-correction, data framing, modulation and emission methods for digital terrestrial television broadcasting BT Series Broadcasting service (television) ii Rec. ITU-R BT.1306-7 Foreword The role of the Radiocommunication Sector is to ensure the rational,
2、equitable, efficient and economical use of the radio-frequency spectrum by all radiocommunication services, including satellite services, and carry out studies without limit of frequency range on the basis of which Recommendations are adopted. The regulatory and policy functions of the Radiocommunic
3、ation Sector are performed by World and Regional Radiocommunication Conferences and Radiocommunication Assemblies supported by Study Groups. Policy on Intellectual Property Right (IPR) ITU-R policy on IPR is described in the Common Patent Policy for ITU-T/ITU-R/ISO/IEC referenced in Annex 1 of Resol
4、ution ITU-R 1. Forms to be used for the submission of patent statements and licensing declarations by patent holders are available from http:/www.itu.int/ITU-R/go/patents/en where the Guidelines for Implementation of the Common Patent Policy for ITU-T/ITU-R/ISO/IEC and the ITU-R patent information d
5、atabase can also be found. Series of ITU-R Recommendations (Also available online at http:/www.itu.int/publ/R-REC/en) Series Title BO Satellite delivery BR Recording for production, archival and play-out; film for television BS Broadcasting service (sound) BT Broadcasting service (television) F Fixe
6、d service M Mobile, radiodetermination, amateur and related satellite services P Radiowave propagation RA Radio astronomy RS Remote sensing systems S Fixed-satellite service SA Space applications and meteorology SF Frequency sharing and coordination between fixed-satellite and fixed service systems
7、SM Spectrum management SNG Satellite news gathering TF Time signals and frequency standards emissions V Vocabulary and related subjects Note: This ITU-R Recommendation was approved in English under the procedure detailed in Resolution ITU-R 1. Electronic Publication Geneva, 2015 ITU 2015 All rights
8、reserved. No part of this publication may be reproduced, by any means whatsoever, without written permission of ITU. Rec. ITU-R BT.1306-7 1 RECOMMENDATION ITU-R BT.1306-7 Error-correction, data framing, modulation and emission methods for digital terrestrial television broadcasting (Question ITU-R 1
9、32-2/6) (1997-2000-2005-2006-2009-03/2011-12/2011-2015) Scope This Recommendation defines error-correction, data framing, modulation and emission methods for the existing digital terrestrial television broadcasting systems. The ITU Radiocommunication Assembly, considering a) that digital terrestrial
10、 television broadcasting (DTTB) is being introduced in the VHF/UHF bands by some administrations from 1997; b) that DTTB should fit into existing 6, 7, 8 MHz channels intended for analogue television transmission; c) that it may be desirable to support the simultaneous transmission of a hierarchy of
11、 nested quality levels (including high definition television (HDTV), standard definition TV (SDTV) and low definition TV (LDTV) within a single channel; d) that it may be necessary for DTTB services to coexist with existing analogue television transmissions for a temporary period; e) that many types
12、 of interference, including co-channel and adjacent channel, ignition noise, multipath and other signal distortions exist in the VHF/UHF bands; f) that commonalities with alternative media, such as cable and satellite, could be advantageous at the level of outer coding scheme; g) that it is necessar
13、y that the frame synchronization be capable of robustness in channels subject to transmission errors; h) that it is desirable that the frame structure be adapted to different bit rate channels; j) that both single carrier and multi-carrier modulation methods may be introduced; k) that it is desirabl
14、e that there be maximum commonality of characteristics between systems; l) that it is desirable that there be maximum commonality between digital terrestrial television transmissions that are required to coexist with existing analogue television transmissions and those that are not; m) that with the
15、 rapid evolution of digital technologies, digital terrestrial TV systems, proposed at different times, open new attractive possibilities and services; n) that the selection of a modulation option needs to be based on specific conditions such as spectrum resource, policy, coverage requirements, exist
16、ing network structure, reception conditions, type of service required, cost to the consumer and broadcasters, recommends 1 that administrations wishing to introduce DTTB should use one of the families of error correction, framing, modulation and emission methods outlined in Annex 1. 2 Rec. ITU-R BT.
17、1306-7 Annex 1 Table 1a) provides data for single carrier systems, Table 1b) provides data about multi-carrier systems, and Table 1c) provides data about multi-carrier systems with RF band segmentation, Table 1d) provides data about the combined single- and multi-carrier systems, and Table 1e) provi
18、des data about Time-domain synchronized multi-carrier system or TDS multi-carrier systems. Specifications for Systems A, B, C, D and E are found in Attachments 1, 2, 3, 4 and 5. Selection guidelines for Systems A, B, C, D and E are described in Attachment 6 to Annex 1. TABLE 1 Parameters for DTTB tr
19、ansmission systems a) Single carrier systems Parameters 6 MHz 7 MHz 8 MHz 1 Used bandwidth 5.38 MHz (3 dB) 6.00 MHz (3 dB) 7.00 MHz (3 dB) 2 Number of radiated carriers 1 1 1 3 Modulation method 8-VSB 8-VSB 8-VSB 4 Spectrum shaping function Root raised cosine roll-off R = 5.8% Root raised cosine rol
20、l-off R = 8.3% Root raised cosine roll-off R = 7.1% 5 Channel occupancy(17) See Recommendation ITU-R BT.1206 6 Active symbol duration 92.9 ns 83.3 ns 71.4 ns 7 Overall symbol or segment duration 77.3 s (segment) 69.3 s (segment) 59.4 s (segment) 8 Transmission frame duration 48.4 ms 43.4 ms 37.2 ms
21、9 Channel equalization 10 Inner interleaving 12 (independently encoded streams interleaved in time) 24 (independently encoded streams interleaved in time) 28 (independently encoded streams interleaved in time) Inner channel R = 2/3 trellis, concatenated R = 1/2 or R = 1/4 trellis R = 2/3 trellis, co
22、ncatenated R = 1/2 or R = 1/4 trellis R = 2/3 trellis, concatenated R = 1/2 or R = 1/4 trellis 11 Outer channel Reed-Solomon (RS) code RS (207,187, T = 10), concatenated RS (184,164, T = 10) RS (207,187, T = 10), concatenated RS (184,164, T = 10) RS (207,187, T = 10), concatenated RS (184,164, T = 1
23、0) 12 Outer interleaving 52 segment convolutional byte interleaved, concatenated 46 segment byte interleaved 52 segment convolutional byte interleaved, concatenated 46 segment byte interleaved 52 segment convolutional byte interleaved, concatenated 46 segment byte interleaved 13 Data randomization/
24、Energy dispersal 16 bit PRBS 16 bit PRBS 16 bit PRBS Rec. ITU-R BT.1306-7 3 TABLE 1 (continued) a) Single carrier systems (end) Parameters 6 MHz 7 MHz 8 MHz 14 Time/frequency synchronization Segment sync, pilot carrier Segment sync, pilot carrier Segment sync, pilot carrier 15 Frame synchronization
25、Frame sync Frame sync Frame sync 16 Data equalization Frame sync, PN.511 and 3 PN.63 Frame sync, PN.511 and 3 PN.63 Frame sync, PN.511 and 3 PN.63 17 Transmission mode identification Mode symbols in frame sync Mode symbols in frame sync Mode symbols in frame sync 18 Net data rate Depending on modula
26、tion code rate 4.23-19.39 Mbit/s Depending on modulation code rate 4.72-21.62 Mbit/s Depending on modulation code rate 5.99-27.48 Mbit/s 19 Carrier-to-noise ratio in an additive white Gaussian noise (AWGN) channel Depending on channel code, 15.19 dB, 9.2 dB, 6.2 dB(1), (2) Depending on channel code,
27、 15.19 dB, 9.2 dB, 6.2 dB(2) Depending on channel code, 15.19 dB, 9.2 dB, 6.2 dB(2) b) Multi-carrier systems Parameters 6 MHz multi-carrier (OFDM) 7 MHz multi-carrier (OFDM) 8 MHz multi-carrier (OFDM) 1 Used bandwidth 5.71 MHz 6.66 MHz 7.61 MHz 2 Number of radiated carriers 1 705 (2k mode)(3) 3 409
28、(4k mode) 6 817 (8k mode) 1 705 (2k mode)(3) 3 409 (4k mode) 6 817 (8k mode) 1 705 (2k mode)(3) 3 409 (4k mode) 6 817 (8k mode) 3 Modulation mode Constant coding and modulation (CCM) Constant coding and modulation (CCM) Constant coding and modulation (CCM) 4 Modulation method QPSK, 16-QAM, 64-QAM, M
29、R-16-QAM, MR-64-QAM(4) QPSK, 16-QAM, 64-QAM, MR-16-QAM, MR-64-QAM(4) QPSK, 16-QAM, 64-QAM, MR-16-QAM, MR-64-QAM(4) 5 Channel occupancy(17) See Recommendation ITU-R SM.1541 See Recommendations ITU-R BT.1206 or ITU-R SM.1541 See Recommendations ITU-R BT.1206 or ITU-R SM.1541 6 Active symbol duration 2
30、98.67 s (2k mode) 597.33 s (4k mode) 1 194.67 s (8k mode) 256 s (2k mode) 512 s (4k mode) 1 024 s (8k mode) 224 s (2k mode) 448 s (4k mode) 896 s (8k mode) 7 Carrier spacing 3 348.21 Hz (2k mode) 1 674.11 Hz (4k mode) 837.05 Hz (8k mode) 3 906 Hz (2k mode) 1 953 Hz (4k mode) 976 Hz (8k mode) 4 464 H
31、z (2k mode) 2 232 Hz (4k mode) 1 116 Hz (8k mode) 4 Rec. ITU-R BT.1306-7 TABLE 1 (continued) b) Multi-carrier systems (continued) Parameters 6 MHz multi-carrier (OFDM) 7 MHz multi-carrier (OFDM) 8 MHz multi-carrier (OFDM) 8 Guard interval duration 1/32, 1/16, 1/8, 1/4 of active symbol duration 9.33,
32、 18.67, 37.33, 74.67 s (2k mode) 18.67, 37.33, 74.67, 149.33 (4k mode) 37.33, 74.67, 149.33, 298.67 s (8k mode) 1/32, 1/16, 1/8, 1/4 of active symbol duration 8, 16, 32, 64 s (2k mode) 16, 32, 64, 128 s (4k mode) 32, 64, 128, 256 s (8k mode) 1/32, 1/16, 1/8, 1/4 of active symbol duration 7, 14, 28,
33、56 s (2k mode) 14, 28, 56, 112 s (4k mode) 28, 56, 112, 224 s (8k mode) 9 Overall symbol duration 308.00, 317.33, 336.00, 373.33 s (2k mode) 616.00, 634.67, 672.00, 746.67 s (4k mode) 1 232.00, 1 269.33, 1 344.00, 1 493.33 s (8k mode) 264, 272, 288, 320 s (2k mode) 528, 544, 576, 640 s (4k mode) 1 0
34、48, 1 088, 1 152, 1 280 s (8k mode) 231, 238, 252, 280 s (2k mode) 462, 476, 504, 560 s (4k mode) 924, 952, 1 008, 1 120 s (8k mode) 10 Transmission frame duration 68 OFDM symbols. One super frame consists of 4 frames 68 OFDM symbols. One super-frame consists of 4 frames 68 OFDM symbols. One super-f
35、rame consists of 4 frames 11 Inner channel code Convolutional code, mother rate 1/2 with 64 states. Puncturing to rate 2/3, 3/4, 5/6, 7/8 Convolutional code, mother rate 1/2 with 64 states. Puncturing to rate 2/3, 3/4, 5/6, 7/8 Convolutional code, mother rate 1/2 with 64 states. Puncturing to rate 2
36、/3, 3/4, 5/6, 7/8 12 Inner interleaving Bit interleaving, combined with native or in-depth(5) symbol interleaving Bit interleaving, combined with native or in-depth(5) symbol interleaving Bit interleaving, combined with native or in-depth(5) symbol interleaving 13 Outer channel Reed-Solomon (RS) cod
37、e RS (204,188, T = 8) RS (204,188, T = 8) RS (204,188, T = 8) 14 Outer interleaving Bytewise convolutional interleaving, I = 12 Bytewise convolutional interleaving, I = 12 Bytewise convolutional interleaving, I = 12 15 Data randomization/ energy dispersal PRBS PRBS PRBS 16 Time/frequency synchroniza
38、tion Pilot carriers(6) Pilot carriers(6) Pilot carriers(6) 17 IP outer channel code Reed-Solomon (RS) code MPE-FEC RS (255,191)(7) MPE-FEC RS (255,191)(7) MPE-FEC RS (255,191)(7) 18 Receiver power consumption reduction Time-slicing(8) Time-slicing(8) Time-slicing(8) Rec. ITU-R BT.1306-7 5 TABLE 1 (c
39、ontinued) b) Multi-carrier systems (end) Parameters 6 MHz multi-carrier (OFDM) 7 MHz multi-carrier (OFDM) 8 MHz multi-carrier (OFDM) 19 Transmission parameter signalling (TPS)(9) Carried by TPS pilot carriers Carried by TPS pilot carriers Carried by TPS pilot carriers 20 System transport stream form
40、at MPEG-2 TS MPEG-2 TS MPEG-2 TS 21 Net data rate Depending on modulation, code rate and guard interval (3.69-23.5 Mbit/s for non-hierarchical modes)(10) Depending on modulation, code rate and guard interval (4.35-27.71 Mbit/s for non-hierarchical modes)(10) Depending on modulation, code rate and gu
41、ard interval (4.98-31.67 Mbit/s for non-hierarchical modes)(10) 22 Carrier-to-noise ratio in an AWGN channel Depending on modulation and channel code. 3.1-20.1 dB(11) Depending on modulation and channel code. 3.1-20.1 dB(11) Depending on modulation and channel code. 3.1-20.1 dB(11) c) Multi-carrier
42、systems with radio-frequency band segmentation(12) Parameters 6 MHz multi-carrier (segmented OFDM) 7 MHz multi-carrier (segmented OFDM) 8 MHz multi-carrier (segmented OFDM) 1 Numbers of segments (Ns) 13(13) 13(13) 13(13) 2 Segment bandwidth (Bws) 6 000/14 = 428.57 kHz 7 000/14 = 500 kHz 8 000/14 = 5
43、71.428 kHz 3 Used bandwidth (Bw) Bw Ns + Cs 5.575 MHz (Mode 1) 5.573 MHz (Mode 2) 5.572 MHz (Mode 3) Bw Ns + Cs 6.504 MHz (Mode 1) 6.502 MHz (Mode 2) 6.501 MHz (Mode 3) Bw Ns + Cs 7.434 MHz (Mode 1) 7.431 MHz (Mode 2) 7.430 MHz (Mode 3) 4 Number of radiated carriers 1 405 (Mode 1) 2 809 (Mode 2) 5 6
44、17 (Mode 3) 1 405 (Mode 1) 2 809 (Mode 2) 5 617 (Mode 3) 1 405 (Mode 1) 2 809 (Mode 2) 5 617 (Mode 3) 5 Modulation method DQPSK, QPSK, 16-QAM, 64-QAM DQPSK, QPSK, 16-QAM, 64-QAM DQPSK, QPSK, 16-QAM, 64-QAM 6 Channel occupancy(17) See Recommendations ITU-R BT.1206 or ITU-R SM.1541 See Recommendations
45、 ITU-R BT.1206 or ITU-R SM.1541 See Recommendations ITU-R BT.1206 or ITU-R SM.1541 7 Active symbol duration 252 s (Mode 1) 504 s (Mode 2) 1 008 s (Mode 3) 216 s (Mode 1) 432 s (Mode 2) 864 s (Mode 3) 189 s (Mode 1) 378 s (Mode 2) 756 s (Mode 3) 8 Carrier spacing (Cs) Bws/108 = 3.968 kHz (Mode 1) Bws
46、/216 = 1.984 kHz (Mode 2) Bws/432 = 0.992 kHz (Mode 3) Bws/108 = 4.629 kHz (Mode 1) Bws/216 = 2.314 kHz (Mode 2) Bws/432 = 1.157 kHz (Mode 3) Bws/108 = 5.291 kHz (Mode 1) Bws/216 = 2.645 kHz (Mode 2) Bws/432 = 1.322 kHz (Mode 3) 6 Rec. ITU-R BT.1306-7 TABLE 1 (continued) c) Multi-carrier systems wit
47、h radio-frequency band segmentation(12) (continued) Parameters 6 MHz multi-carrier (segmented OFDM) 7 MHz multi-carrier (segmented OFDM) 8 MHz multi-carrier (segmented OFDM) 9 Guard interval duration 1/4, 1/8, 1/16, 1/32 of active symbol duration 63, 31.5, 15.75, 7.875 s (Mode 1) 126, 63, 31.5, 15.7
48、5 s (Mode 2) 252, 126, 63, 31.5 s (Mode 3) 1/4, 1/8, 1/16, 1/32 of active symbol duration 54, 27, 13.5, 6.75 s (Mode 1) 108, 54, 27, 13.5 s (Mode 2) 216, 108, 54, 27 s (Mode 3) 1/4, 1/8, 1/16, 1/32 of active symbol duration 47.25, 23.625, 11.8125, 5.90625 s (Mode 1) 94.5, 47.25, 23.625, 11.8125 s (M
49、ode 2) 189, 94.5, 47.25, 23.625 s (Mode 3) 10 Overall symbol duration 315, 283.5, 267.75, 259.875 s (Mode 1) 630, 567, 535.5, 519.75 s (Mode 2) 1 260, 1 134, 1 071, 1 039.5 s (Mode 3) 270, 243, 229.5, 222.75 s (Mode 1) 540, 486, 459, 445.5 s (Mode 2) 1 080, 972, 918, 891 s (Mode 3) 236.25, 212.625, 200.8125, 194.90625 s (Mode 1) 472.5, 425.25, 401.625, 389.8125 s (Mode 2) 945, 850.5, 803.25, 779.625 s (Mode 3) 11 Transmission frame duration 204 OFDM symbols 204 OFDM symbols 204 OFDM symbols 12 Inner channel code Co
