IEC 62753-2015 Digital terrestrial television receivers for the DTMB system《DTMB系统用数字地面电视接收机》.pdf

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1、 IEC 62753 Edition 1.0 2015-06 INTERNATIONAL STANDARD Digital terrestrial television receivers for the DTMB system IEC 62753:2015-06(en) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2015 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be

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10、r feedback on this publication or need further assistance, please contact the Customer Service Centre: csciec.ch. IEC 62753 Edition 1.0 2015-06 INTERNATIONAL STANDARD Digital terrestrial television receivers for the DTMB system INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 33.160; 33.170 ISBN 978-2-

11、8322-2696-4 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. 2 IEC 62753:2015 IEC 2015 CONTENTS FOREWORD . 7 INTRODUCTION . 9 1 Scope 10 2 Normative references. 10 3 Abbreviations and symbols 1

12、0 4 Summary of DTMB transmission system . 12 4.1 General . 12 4.2 Processing of DTMB transmitter 12 4.3 Processing of DTMB receiver 13 5 Receiver capabilities 13 5.1 Frequency spectrum 13 5.1.1 Frequency range 13 5.1.2 Channel bandwidth 13 5.1.3 Frequency acquisition range . 13 5.2 Power supply requ

13、irements . 13 5.3 Interface requirements 13 5.4 Working modes . 14 5.5 Program search and tuning 14 5.5.1 General . 14 5.5.2 Receive quality display . 14 5.5.3 Automatic search . 15 5.5.4 Manual search . 15 5.5.5 Modulation parameters change . 15 5.6 Demultiplex characteristics 15 5.6.1 General . 15

14、 5.6.2 TS data rate . 15 5.6.3 STC recovery . 15 5.6.4 Error control . 15 5.6.5 PID filters 15 5.6.6 Multi-component programs . 15 5.7 Transport stream decoding characteristics . 16 5.7.1 Service and program information 16 5.7.2 EPG 18 5.7.3 Presentation of subtitle 18 5.8 Function requirements . 18

15、 5.8.1 General . 18 5.8.2 Software version update . 19 5.8.3 Chinese graphical operation interface . 19 5.8.4 Service list . 19 5.8.5 Status bar 20 5.8.6 User parameter settings and storage 20 5.8.7 Power failure memory 20 5.8.8 Restore factory settings . 21 5.8.9 Real time clock 21 6 Video and audi

16、o system characteristics 21 IEC 62753:2015 IEC 2015 3 6.1 Video system characteristics . 21 6.1.1 General . 21 6.1.2 Fast acquisition 21 6.1.3 Still images 21 6.1.4 Baseband video input format 21 6.2 Audio system characteristics . 22 7 RF part and channel decoder . 22 7.1 RF port . 22 7.1.1 RF input

17、 port 22 7.1.2 RF loop output port 22 7.2 Performance . 23 7.2.1 Failure point criteria . 23 7.2.2 Carrier to noise ratio threshold . 23 7.2.3 Minimum signal input levels 23 7.2.4 Maximum signal input level 23 7.2.5 Immunity to analogue signals in an adjacent channel 23 7.2.6 Immunity to co-channel

18、analogue signals 24 7.2.7 Immunity to digital signals in an adjacent channel . 24 7.2.8 Immunity to co-channel digital signals 25 7.2.9 Resistance to 0 dB echo. 25 7.2.10 Resistance to dynamic multipath channel . 26 7.2.11 Resistance to pulse noise interference . 26 8 Test method 26 8.1 RF demodulat

19、ion and channel decoding . 26 8.1.1 General . 26 8.1.2 Frequency range 27 8.1.3 Frequency acquisition range . 27 8.1.4 Program search and tuning 27 8.1.5 Return loss of RF input port 28 8.1.6 C/N threshold of Gaussian . 29 8.1.7 Signal input level range 29 8.1.8 Immunity to analogue signals in adjac

20、ent channels . 30 8.1.9 Immunity to analogue signals in a co-channel . 30 8.1.10 Immunity to digital signals in adjacent channels 31 8.1.11 Immunity to digital signals in a co-channel 31 8.1.12 Resistance to 0 dB echo. 32 8.1.13 Resistance to a dynamic multipath channel . 32 8.1.14 Resistance to pul

21、se noise interference . 33 8.2 Demultiplex characteristics 33 8.2.1 TS data rate . 33 8.2.2 STC recovery . 34 8.2.3 Error control . 34 8.2.4 PID filters 35 8.2.5 Multi-component programs processing 35 8.3 Transport stream decoding 35 8.3.1 Service and program information 35 8.3.2 EPG 36 8.3.3 Presen

22、tation of text 36 8.4 Power endurance 36 4 IEC 62753:2015 IEC 2015 8.4.1 Power voltage endurance . 36 8.4.2 Power frequency endurance . 37 Annex A (normative) Acceptable error free . 38 Annex B (normative) Multipath channel models 39 B.1 Rayleigh channel model 39 B.2 Rice channel model . 39 B.3 Dyna

23、mic multipath channel model 40 Annex C (informative) Guide to the implementing of a DRA audio decoder in a DTMB receiver 41 C.1 General . 41 C.2 Outline, terms and definitions 41 C.2.1 Outline . 41 C.2.2 Terms and definitions . 43 C.3 DRA syntax structure 45 C.3.1 General . 45 C.3.2 DRA bit stream 4

24、5 C.3.3 Frame 45 C.3.4 Frame header 46 C.4 Semantic. 47 C.4.1 General . 47 C.4.2 Bit stream 47 C.4.3 Frame 47 C.4.4 Frame header 48 C.4.5 Unpacking window sequence bits . 52 C.4.6 Unpacking Huffman code book selection and application range bits 54 C.4.7 Unpacking quantization index bits of subband s

25、amples . 54 C.4.8 Unpacking quantization stepsize index bits . 54 C.4.9 Unpacking sum/difference coding decision bits . 54 C.4.10 Unpacking joint intensity coding scale factor bits 55 C.4.11 Unpacking padding bits 55 C.4.12 Unpacking auxiliary data 55 C.5 Decoding 55 C.5.1 Channel arranging and conf

26、iguration 55 C.5.2 Downmixing . 57 C.5.3 De-interleaving 58 C.5.4 Reconstruction of the number of quantification units . 59 C.5.5 Dequantizer . 59 C.5.6 Joint intensity decoding 60 C.5.7 Sum/difference decoding 60 C.5.8 Variable resolution synthesis filter bank 60 C.5.9 Reconstruction of the short/b

27、rief window function sequence 63 Bibliography . 64 Figure 1 Diagram of DTMB transmitter processing 12 Figure 2 Diagram of DTMB receiver processing 13 Figure 3 Test set-up for frequency range 27 Figure 4 Test set-up for program search and tuning 28 Figure 5 Test set-up for return loss . 29 IEC 62753:

28、2015 IEC 2015 5 Figure 6 Test set-up for C/N threshold of Gaussian . 29 Figure 7 Test set-up for signal input level range . 29 Figure 8 Test set-up for immunity to analogue signals in adjacent channels 30 Figure 9 Test set-up for immunity to digital signals in adjacent channels . 31 Figure 10 Test s

29、et-up for resistance to 0 dB echo . 32 Figure 11 Test set-up for immunity to pulse noise interference 33 Figure 12 Test set-up for TS data rate 33 Figure 13 Test set-up for STC recovery 34 Figure 14 Test set-up for power voltage and frequency endurance 36 Figure C.1 Decoder 42 Table 1 Power supply r

30、equirements 13 Table 2 Requirements of interface 14 Table 3 Required working modes . 14 Table 4 Requirements of EPG supporting . 18 Table 5 Supporting functions 19 Table 6 Video parameters 21 Table 7 Video format 22 Table 8 C/N for reference AEF . 23 Table 9 Minimum received signal level . 23 Table

31、10 Immunity to analogue signals in a N 1 adjacent channel 24 Table 11 Immunity to analogue signals in a N + 1 adjacent channel 24 Table 12 Immunity to co-channel analogue signals . 24 Table 13 Immunity to digital signals in an adjacent channel 25 Table 14 Immunity to co-channel digital signals 25 Ta

32、ble 15 Requirements of delay to 0 dB echo . 25 Table 16 Requirements of C/N thresholds to 30 s echo . 26 Table 17 Resistance to dynamic multipath channel . 26 Table 18 Requirements of pulse noise interference length 26 Table B.1 Rayleigh channel model (static) 39 Table B.2 Rice channel model (static

33、) 40 Table B.3 Dynamic multipath channel model . 40 Table C.1 Frame structure 47 Table C.2 Data structure of a normal channel . 48 Table C.3 Data structure of LFE channel 48 Table C.4 Frame header type . 49 Table C.5 Difference between two types of frame headers 49 Table C.6 Number of bits used for

34、decoding the length of audio data frame 49 Table C.7 Sampling frequency supported by this annex 50 Table C.8 Number of bits used for decoding the number of normal channels 50 Table C.9 Number of bits used for decoding the number of LFE channels . 51 Table C.10 Channel configuration auxiliary informa

35、tion decision . 51 Table C.11 Sum/difference coding decision 51 6 IEC 62753:2015 IEC 2015 Table C.12 Intensity joint coding decision . 51 Table C.13 Window function index 52 Table C.14 Number of transient clusters . 53 Table C.15 Implicit length of a transient cluster of a stationary frame 53 Table

36、C.16 Starting location of the first transient cluster and the location where the first transient occurs . 53 Table C.17 Variables used to decode sum/difference coding decision . 54 Table C.18 All unused sum/difference coding decision 55 Table C.19 Sum/difference coding decision 55 Table C.20 Default

37、 normal channel configuration 56 Table C.21 Presentation of a normal channel configuration 56 Table C.22 Audio data arranging the order of each channel in the audio frame 56 Table C.23 Arranging the order of audio data for 5.1 channel surround sound in the audio frame 57 Table C.24 Subband samples a

38、rranged in a natural order . 58 Table C.25 Subband samples arranged in interleaving order . 59 Table C.26 Optional window function around the transient location . 63 IEC 62753:2015 IEC 2015 7 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ DIGITAL TERRESTRIAL TELEVISION RECEIVERS FOR THE DTMB SYSTEM FOR

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49、y that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 62753 has been prepared by technical area 1: Terminals for audio, video and data services and contents of IEC technical committee 100: Audio, video and multimedia systems and equipment. The text of this standard is b