- •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
96 |
ETSI ES 201 980 V4.1.2 (2017-04) |
The overall code rate for each protection part for the HMsym is approximately:
RVSPP = R0
RSPP,all = (R1 + R2 ) / 2
7.3.1.3Partitioning of bitstream in HMmix
The bitstream of the SPP (ui) shall be partitioned into five streams (xRep,i , xImp,i ) . The bits of the higher protected part
shall be fed to the encoders on p = 0 to 2, then the bits of the lower protected part shall be fed to the encoders on p = 0 to 2. This results in:
(xIm |
, xIm ,..., xIm |
Im |
, xRe , xRe ,K, xRe |
Re |
, xIm , xIm ,..., xIm |
Im |
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, xRe , xRe |
,K, xRe |
Re |
, xIm |
, xIm |
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0,0 |
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0,1 |
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0,M |
0,1 |
−1 |
1,0 |
1,1 |
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1,M1,1 |
−1 |
1,0 |
1,1 |
1,M |
1,1 |
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−1 |
2,0 |
2,1 |
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2,M |
2,1 −1 |
2,0 |
2,1 |
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xIm |
Im , xIm |
Im |
,..., xIm |
Im |
Im |
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, xRe Re , xRe |
Re |
+1 |
,K, xRe |
Re |
+ M |
|
Re |
−1 |
, xIm |
Im , xIm Im |
,..., xIm |
Im |
Im |
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0,M 0,1 |
0,M |
0,1 +1 |
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0,M 0,1 + M 0, 2 −1 |
1,M1,1 |
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1,M |
1,1 |
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1,M |
1,1 |
1,2 |
1,M1,1 |
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1,M1,1 |
+1 |
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1,M |
1,1 |
+ M1,1 |
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xRe |
Re |
, xRe |
Re |
,K, xRe |
Re |
Re |
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, xIm |
Im |
, xIm |
Im |
+1 |
,..., xIm |
Im |
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Im |
) = |
(u |
0 |
,u ,Ku |
L1 + L2 −1 |
) |
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2,M 2,1 |
2,M 2,1 |
+1 |
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2,M |
2,1 |
+ M 2, 2 |
−1 2,M |
2,1 |
2,M |
2,1 |
2,M |
2,1 + M |
2,1 |
−1 |
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1 |
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The bits of the VSPP (u'i) shall be fed to the encoder for the real part on level p = 0:
,..., xIm Im − ,
2,M 2,1 1
−1,
(x0,0Re , x0,1Re ,, , xRe Re |
) = (u |
0' |
,u1' , |
uL' |
−1 ) |
0,M 0, 2 |
−1 |
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VSPP |
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When using only one protection level (EEP) the elements with negative indexes shall not be taken into account.
The number of bits on each level p is calculated for the higher protected and lower protected parts for the real and imaginary component by:
M 0Re,1 = 0 , M 0Im,1 = N1R0Im
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N |
1 |
+ N |
2 |
−12 |
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M Im |
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RX Im |
N |
2 |
−12 |
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M Re |
= RX Re |
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= L |
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, |
= |
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RY Re |
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RY Im |
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0,2 |
0 |
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VSSP |
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0,2 |
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0 |
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0 |
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0 |
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M Re |
= N RRe |
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and |
M Im |
= N RIm |
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for |
p {1,2} |
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p,1 |
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1 |
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p |
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p,1 |
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1 |
p |
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N |
2 |
−12 |
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N |
2 |
−12 |
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p {1,2} |
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M Rep,2 = RX Rep |
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and |
M Imp,2 |
= RX Imp |
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for |
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Re |
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Im |
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RYp |
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RYp |
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The total number of bits on each level p in the real and imaginary component results in:
M Rep = M Rep,1 + M Rep,2 |
and M Imp |
= M Imp,1 + M Imp,2 for p {0,1,2} |
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From these formulas it can be derived that the input bitstreams (xRep,i ) |
and (xImp,i ) to the encoders C Rep |
and C Imp |
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respectively have different lengths according to their code rate so that all the encoder output bitstreams |
p {0,1,2} have |
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the same length. |
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The overall code rate for the HMmix schemes of each protection part is approximately: |
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R |
= R Re |
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VSPP |
0 |
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R |
SPP,all |
= (R Im + R Re + R Im |
+ R Re |
+ R Im ) / 5 |
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0 |
1 |
1 |
2 |
2 |
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ETSI