1 Scope
This part specifies the multiplex frame structure of audio, data and control information in digital audio broadcasting system within the frequency range of 87~108Mhz.
This part is applicable to the broadcasting system transmitting digital audio broadcasting service and data service through ground wireless coverage within the frequency range of 87~108MHz.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the normative document (including any amendments) applies.
GB/T 2659-2000 Codes for the Representation of Names of Countries and Regions
GB/T 4880.2-2000 Codes for the Representation of Names of Language - Part 2: Alpha-3 Code
GB/T 15273.1-1994 Information Processing - 8-bit Single-byte Coded Graphic Character Sets - Part 1: Latin Alphabet No.1
GB/T 28161-2011 Specification of Conditional Access System for Digital Television Broadcasting
GY/T 268.1-2013 Digital Audio Broadcasting in FM Band - Part 1: Framing Structure, Channel Coding and Modulation for Digital Broadcasting Channel
3 Terms and Definitions
For the purpose of this part, the following terms and definitions apply.
3.1
Service
Data content such as the audio program broadcasted on schedule.
3.2
Service description information channel
The channel used for carrying the service description information in the logical frame of information channel.
3.3
Service data channel
The channel used for carrying service data in the logical frame of information channel.
3.4
Multiplex frame
The data frame encapsulating the control or service information.
3.5
Control multiplex frame
A kind of multiplex frame used for encapsulating control information.
3.6
Service multiplex frame
A kind of multiplex frame used for encapsulating service information.
3.7
Multiplex sub-frame
The basic composition unit of service multiplex frame.
3.8
Transmission mode of multiplex frame
The occupation of logical frame by the service multiplex frame in the superframe of a digital broadcasting information channel.
3.9
Network
A digital audio broadcasting transfer system which may operate independently; it may include multiple carrier frequencies or broadcast multi-channel service.
3.10
Adjacent network
The network overlapped with or adjacent to the current network coverage area.
3.11
Audio section
A separately defined section in multiplex sub-frame, which is used for carrying audio information.
3.12
Audio unit
The basic composition unit of audio section.
3.13
Data section
A separately defined section in multiplex sub-frame, which is used for carrying multi-media information such as data.
3.14
Data unit
The basic composition unit of data section.
3.15
Encapsulation mode
The mapping method of service information such as audio and data to the multiplex sub-frame, including mapping of Mode 1 (section mode) and Mode 2 (block mode).
3.16
Data block
A kind of specific data structure used for further dividing the audio unit or data unit.
4 Abbreviations, Symbols and Conventions
Foreword I
Introduction II
1 Scope
2 Normative References
3 Terms and Definitions
4 Abbreviations, Symbols and Conventions
4.1 Abbreviations
4.2 Symbols
4.3 Conventions
5 General
6 Control Multiplex Frame
6.1 Control Multiplex Frame Header
6.2 Net Load of Control Multiplex Frame
6.3 Control Information Table
7 Service Multiplex Frame
7.1 Service Multiplex Frame Header
7.2 Net Load of Service Multiplex Frame
7.3 MSF
Appendix A (Normative) Mapping Mode of Service Multiplex Frame to Logical Frame of Information Channel Where Channel is Equally Protected
Appendix B (Informative) Calculation Model for Service Data and Net Load of Service Description Information Channel
Appendix C (Normative) Cyclic Redundancy Check (CRC) Model
Appendix D (Informative) Example for Transmission Mode of Multiplex Frame
Figure 1 Position of Multiplexing in Digital Audio Broadcasting System
Figure 2 Correlation between Multiplex Frame and Channel Frame
Figure 3 Multiplex Frame Structure
Figure 4 Structure of Control Multiplex Frame Header
Figure 5 Net Load Structure of Control Multiplex Frame
Figure 6 Structure of Service Multiplex Frame Header
Figure 7 Net Load Structure of Service Multiplex Frame
Figure 8 MSF Structure
Figure 9 Audio Section Structure
Figure 10 Data Section Structure
Figure 11 Structure of Data Block
Figure A.1 Structure of Service Multiplex Frame without Layered Protection Mechanism
Figure A.2 Structure of Service Multiplex Frame with Layered Protection Mechanism
Figure C.1 Universal CRC Model
Figure D.1 Example 1 for Transmission Mode of Multiplex Frame
Figure D.2 Example 2 for Transmission Mode of Multiplex Frame
Figure D.3 Example 3 for Transmission Mode of Multiplex Frame
Table 1 Parameters of Control Multiplex Frame Header
Table 2 Distribution of Table Identifier No.
Table 3 SMCT
Table 4 NIT
Table 5 Parameters of Service Multiplex Frame Header
Table 6 Parameters of Sub-frame Header
Table 7 Indication of Encapsulation Mode
Table 8 Identifier of Sound Channel Number
Table 9 Audio Sampling Rate
Table 10 Audio Section Header
Table 11 Data Section Header
Table 12 Type of Data Unit
Table 13 Data Block Header Parameter
Table 14 Type of Data Block
Table B.1 Systematic Net Load Carried by Service Data Channel in a Subband in a Logical Frame
Table B.2 Systematic Net Load Carried by Service Description Information Channel in a Subband in a Logical Frame
