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
