- •Intellectual Property Rights
- •Foreword
- •Modal verbs terminology
- •Introduction
- •1 Scope
- •2 References
- •2.1 Normative references
- •2.2 Informative references
- •3 Definitions, symbols, abbreviations and conventions
- •3.1 Definitions
- •3.2 Symbols
- •3.3 Abbreviations
- •3.4 Conventions
- •4 General characteristics
- •4.1 System overview
- •4.2 System architecture
- •4.3 Audio source coding
- •4.4 Transmission modes
- •4.4.1 Signal bandwidth related parameters
- •4.4.2 Transmission efficiency related parameters
- •4.4.2.0 General
- •4.4.2.1 Coding rates and constellations
- •4.4.2.2 OFDM parameter set
- •5 Source coding modes
- •5.1 Overview
- •5.1.0 Introduction
- •5.1.2 AAC audio coding
- •5.1.3 MPEG Surround coding
- •5.2 Audio super framing
- •5.3.1.0 Introduction
- •5.3.3.0 Introduction
- •5.3.3.1 Frequency Domain coding (AAC based coding and TCX)
- •5.3.3.2 ACELP
- •5.3.3.4 MPS212 parametric stereo
- •5.3.3.5 MDCT based Complex Prediction
- •5.3.3.6 Forward Aliasing Cancellation
- •5.4 AAC coding
- •5.4.3 Parametric Stereo coding
- •5.4.4 AAC error concealment
- •5.4.4.0 Introduction
- •5.4.4.1 Interpolation of one corrupt frame
- •5.4.4.3 Concealment granularity
- •5.4.4.4 SBR error concealment
- •5.4.4.5 Parametric Stereo concealment
- •6 Multiplex definition
- •6.1 Introduction
- •6.2 Main Service Channel (MSC)
- •6.2.1 Introduction
- •6.2.2 Structure
- •6.2.3 Building the MSC
- •6.2.3.0 Introduction
- •6.2.3.1 Multiplex frames
- •6.2.3.2 Hierarchical frames
- •6.2.4 Reconfiguration
- •6.3 Fast Access Channel (FAC)
- •6.3.1 Introduction
- •6.3.2 Structure
- •6.3.3 Channel parameters
- •6.3.4 Service parameters
- •6.3.6 FAC repetition
- •6.4 Service Description Channel (SDC)
- •6.4.1 Introduction
- •6.4.2 Structure
- •6.4.3 Data entities
- •6.4.3.0 Introduction
- •6.4.3.1 Multiplex description data entity - type 0
- •6.4.3.2 Label data entity - type 1
- •6.4.3.3 Conditional access parameters data entity - type 2
- •6.4.3.4 Alternative frequency signalling: Multiple frequency network information data entity - type 3
- •6.4.3.5 Alternative frequency signalling: Schedule definition data entity - type 4
- •6.4.3.6 Application information data entity - type 5
- •6.4.3.7 Announcement support and switching data entity - type 6
- •6.4.3.8 Alternative frequency signalling: Region definition data entity - type 7
- •6.4.3.9 Time and date information data entity - type 8
- •6.4.3.10 Audio information data entity - type 9
- •6.4.3.11 FAC channel parameters data entity - type 10
- •6.4.3.12 Alternative frequency signalling: Other services data entity - type 11
- •6.4.3.13 Language and country data entity - type 12
- •6.4.3.14 Alternative frequency signalling: detailed region definition data entity - type 13
- •6.4.3.15 Packet stream FEC parameters data entity - type 14
- •6.4.3.16 Extension data entity - type 15
- •6.4.3.16.0 General
- •6.4.3.16.1 Service linking information data entity - type 15, extension 0
- •6.4.3.16.2 Other data entity type 15 extensions
- •6.4.4 Summary of data entity characteristics
- •6.4.5 Changing the content of the SDC
- •6.4.6 Signalling of reconfigurations
- •6.4.6.0 Introduction
- •6.4.6.1 Service reconfigurations
- •6.4.6.2 Channel reconfigurations
- •6.5 Text message application
- •6.6 Packet mode
- •6.6.0 Introduction
- •6.6.1 Packet structure
- •6.6.1.0 Introduction
- •6.6.1.1 Header
- •6.6.1.2 Data field
- •6.6.2 Asynchronous streams
- •6.6.3 Files
- •6.6.4 Choosing the packet length
- •6.6.5 Forward Error Correction (FEC) for packet mode streams
- •6.6.5.0 Introduction
- •6.6.5.1 Encoding of FEC Packets
- •6.6.5.2 Transport of FEC packets
- •6.6.5.3 Receiver considerations
- •7 Channel coding and modulation
- •7.1 Introduction
- •7.2 Transport multiplex adaptation and energy dispersal
- •7.2.1 Transport multiplex adaptation
- •7.2.1.0 General
- •7.2.2 Energy dispersal
- •7.3 Coding
- •7.3.1 Multilevel coding
- •7.3.1.0 Introduction
- •7.3.1.1 Partitioning of bitstream in SM
- •7.3.1.2 Partitioning of bitstream in HMsym
- •7.3.1.3 Partitioning of bitstream in HMmix
- •7.3.2 Component code
- •7.3.3 Bit interleaving
- •7.3.3.0 Introduction
- •7.4 Signal constellations and mapping
- •7.5 Application of coding to the channels
- •7.5.1 Coding the MSC
- •7.5.1.0 Introduction
- •7.5.1.2 HMsym
- •7.5.1.3 HMmix
- •7.5.2 Coding the SDC
- •7.5.3 Coding the FAC
- •7.6 MSC cell interleaving
- •7.7 Mapping of MSC cells on the transmission super frame structure
- •8 Transmission structure
- •8.1 Transmission frame structure and robustness modes
- •8.3 Signal bandwidth related parameters
- •8.3.1 Parameter definition
- •8.3.2 Simulcast transmission
- •8.4 Pilot cells
- •8.4.1 Functions and derivation
- •8.4.2 Frequency references
- •8.4.2.0 Introduction
- •8.4.2.1 Cell positions
- •8.4.2.2 Cell gains and phases
- •8.4.3 Time references
- •8.4.3.0 Introduction
- •8.4.3.1 Cell positions and phases
- •8.4.3.2 Cell gains
- •8.4.4 Gain references
- •8.4.4.0 Introduction
- •8.4.4.1 Cell positions
- •8.4.4.2 Cell gains
- •8.4.4.3 Cell phases
- •8.4.4.3.0 Intorduction
- •8.4.4.3.1 Procedure for calculation of cell phases
- •8.4.4.3.2 Robustness mode A
- •8.4.4.3.3 Robustness mode B
- •8.4.4.3.4 Robustness mode C
- •8.4.4.3.5 Robustness mode D
- •8.4.4.3.6 Robustness mode E
- •8.4.5 AFS references
- •8.4.5.0 Introduction
- •8.4.5.1 Cell positions and phases
- •8.4.5.2 Cell gains
- •8.5 Control cells
- •8.5.1 General
- •8.5.2 FAC cells
- •8.5.2.1 Cell positions
- •8.5.2.2 Cell gains and phases
- •8.5.3 SDC cells
- •8.5.3.1 Cell positions
- •8.5.3.2 Cell gains and phases
- •8.6 Data cells
- •8.6.1 Cell positions
- •8.6.2 Cell gains and phases
- •B.1 Robustness modes A, B, C and D
- •B.2 Robustness mode E
- •F.0 Introduction
- •F.2 Possibilities of the announcement feature
- •F.3 SDC data entities overview for Alternative Frequency and announcement signalling
- •F.4 SDC data entities and setup for alternative frequency signalling
- •F.5 SDC data entities and setup for announcement
- •F.6 Alternative frequency and announcement signalling - coding example
- •G.0 Introduction
- •G.1 Alternative Frequency checking and Switching (AFS)
- •G.2 Station buttons for DRM services
- •G.3 Seamless Alternative Frequency checking and Switching (AFS)
- •G.4 Character sets
- •Annex I: (void)
- •Annex N: (void)
- •R.1 Overview
- •R.2 General network timing considerations
- •R.3 Network synchronization rules
- •R.4 Receiver implementation rules
- •R.5 Definition of broadcast signal time references
- •T.0 Introduction
- •T.1 Domestic services
- •T.2 International services
- •History
110 |
ETSI ES 201 980 V4.1.2 (2017-04) |
The data stream at the output of the interleaver consists of a number of bit words. These are mapped onto one signal point in the signal diagram according a complex number z. For SM and HMsym the 64-QAM diagram shall be used according to figures 26 and 27 respectively. The bits shall be mapped accordingly:
(y0' y1' y2' y3' y4' y5' )= (y0,0 y1,0 y2,0 y0,1 y1,1 y2,1 )
For HMmix the 64-QAM diagram shall be used according to figure 28. The bits shall be mapped accordingly:
(y |
' |
y' |
y |
' |
y |
' |
y |
' |
y |
' |
)= yRe |
yRe |
yRe yIm yIm |
yIm |
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0 |
1 |
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2 |
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3 |
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4 |
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5 |
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0,0 |
1,0 |
2,0 |
0,0 |
1,0 |
2,0 |
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The 16-QAM diagram shall be used according figure 29. The bits shall be mapped accordingly:
(y0' y1' y2' y3' )= (y0,0 y1,0 y0,1 y1,1 )
The 4-QAM diagram shall be used according figure 30. The bits shall be mapped accordingly:
(y0' y1' )= (y0,0 y0,1 )
7.5Application of coding to the channels
7.5.1Coding the MSC
7.5.1.0Introduction
The MSC may use either 64-QAM or 16-QAM mapping in robustness modes A, B, C and D and 16-QAM or 4-QAM mapping in robustness mode E. For all robustness modes, the higher constellation provides high spectral efficiency whereas the lower constellation provides a more robust error performance.
In each case, a range of code rates is available to provide the most appropriate level of error correction for a given transmission. The available combinations of constellation and code rate provide a large degree of flexibility over a wide range of transmission channels. Unequal error protection can be used to provide two levels of protection for the MSC. For the case of 64-QAM, hierarchical modulation may be used to provide a third level of error robustness for a part of the MSC.
7.5.1.1SM
Two protection levels within one multiplex frame are possible resulting in the use of two overall code rates. The number of input bits LMUX per multiplex frame is calculated with the formulas of clause 7.2.
The MSC shall be encoded according to clause 7.3. The overall code rates and code rates for each level are defined in tables 29 to 32. The protection level is signalled in the multiplex description data entity of the SDC (see clause 6.4.3.1).
Four code rates are defined for 4-QAM for robustness mode E as follows.
Table 29: Code rates for the MSC with 4-QAM (robustness mode E)
Protection level |
Rall |
R0 |
0 |
0,25 |
1/4 |
1 |
0,33 |
1/3 |
2 |
0,4 |
2/5 |
3 |
0,5 |
1/2 |
ETSI
111 |
ETSI ES 201 980 V4.1.2 (2017-04) |
Two overall code rates are defined for 16-QAM for robustness modes A, B, C and D and four overall code rates are defined for 16-QAM for robustness mode E as follows.
Table 30: Code rate combinations for the MSC with 16-QAM (robustness modes A, B, C and D)
Protection level |
Rall |
R0 |
R1 |
RYlcm |
0 |
0,5 |
1/3 |
2/3 |
3 |
1 |
0,62 |
1/2 |
3/4 |
4 |
Table 31: Code rate combinations for the MSC with 16-QAM (robustness mode E)
Protection level |
Rall |
R0 |
R1 |
RYlcm |
0 |
0,33 |
1/6 |
1/2 |
6 |
1 |
0,41 |
1/4 |
4/7 |
28 |
2 |
0,5 |
1/3 |
2/3 |
3 |
3 |
0,62 |
1/2 |
3/4 |
4 |
Four overall code rates are defined for 64-QAM as follows.
Table 32: Code rate combinations for the MSC with 64-QAM (robustness modes A, B, C and D)
Protection level |
Rall |
R0 |
R1 |
R2 |
RYlcm |
|
|
0 |
0,5 |
1/4 |
1/2 |
3/4 |
4 |
|
1 |
0,6 |
1/3 |
2/3 |
4/5 |
15 |
|
2 |
0,71 |
1/2 |
3/4 |
7/8 |
8 |
|
3 |
0,78 |
2/3 |
4/5 |
8/9 |
45 |
NOTE: |
These code rates are also used for the imaginary |
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part of HMmix. |
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One or two overall code rates shall be applied to one multiplex frame. When using two overall code rates, both shall belong to the same constellation.
Annex J provides the number of input bits per multiplex frame for EEP.
7.5.1.2HMsym
Two protection levels are possible resulting in the use of two overall code rates. The number of input bits LMUX per multiplex frame is calculated with the formulas of clause 7.2.
The MSC shall be encoded according to clause 7.3. The overall code rates and code rates for each level for the SPP are defined in table 33 and for the VSPP in table 34. The protection level is signalled in the multiplex description data entity of the SDC (see clause 6.4.3.1).
Four overall code rates are defined for the SPP as follows.
Table 33: Code rate combinations for the SPP of MSC with HMsym 64-QAM (robustness modes A, B, C and D)
Protection level |
Rall |
R1 |
R2 |
RYlcm |
|
|
0 |
0,45 |
3/10 |
3/5 |
10 |
|
1 |
0,55 |
4/11 |
8/11 |
11 |
|
2 |
0,72 |
4/7 |
7/8 |
56 |
|
3 |
0,78 |
2/3 |
8/9 |
9 |
NOTE: |
These code rates are also used for the real part |
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of HMmix. |
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ETSI