Type 0 Extension 8 - mattpascoe135/dab GitHub Wiki

The Extension 8 of FIG type 0 (FIG 0/8) provides information to link together the service component description that is valid within the ensemble to a service component description that is valid in other ensembles. Figure 28 shows the structure.

The following definitions apply:

###SId (Service Identifier): this 16-bit or 32-bit field shall identify the service. The length of the SId shall be signalled by the P/D flag, see clause 5.2.2.1.

###Ext. (Extension) flag: this 1-bit flag shall indicate whether or not the 8-bit Rfa field is present, as follows:

0: Rfa field absent;

1: Rfa field present.

###Rfa: this 3-bit field shall be reserved for future additions. The bits shall be set to zero until they are defined.

###SCIdS (Service Component Identifier within the Service): this 4-bit field shall identify the service component within the service. The combination of the SId and the SCIdS provides a service component identifier which is valid globally.

###L/S flag: this 1-bit flag shall indicate whether the service component identifier takes the short or the long form, as follows:

0: short form;

1: long form.

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##Short form: ###MSC/FIC flag: this 1-bit flag shall indicate whether the component is carried in the MSC in stream mode or in the FIC, and whether the subsequent field contains the SubChId or the FIDCId (see clause 6.3.1), as follows:

0: MSC in stream mode and SubChId identifies the sub-channel;

1: FIC and FIDCId identifies the component.

###SubChId (Sub-channel Identifier): this 6-bit field shall identify the sub-channel in which the service component is carried;

###FIDCId (Fast Information Data Channel Identifier): this 6-bit flag shall identify the service component carried in the FIDC (see clause 6.3.1);

##Long form: ###Rfa: this 3-bit field shall be reserved for future additions. The bits shall be set to zero until they are defined;

###SCId: this 12-bit field shall identify the service component (see clause 6.3.1).

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###Rfa: this 8-bit field shall be reserved for future additions. The bits shall be set to zero until they are defined.