Type 0 Extension 9 - mattpascoe135/dab GitHub Wiki

#Extension 9 - Country, LTO and International table The Country, LTO and International table feature defines the local time offset, the International Table and the Extended Country Code (ECC). The feature is encoded in Extension 9 of FIG type 0 (FIG 0/9). Figure 47 shows the structure of the country, LTO and international table field which is part of the Type 0 field (see also figure 4).

This feature shall use the SIV signalling (see clause 5.2.2.1). Changes to the database shall be signalled using the CEI.

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The following definitions apply:

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

0: extended field absent;

1: extended field present.

###LTO unique: this 1-bit flag shall indicate whether the ensemble covers one or several time zones, as follows:

0: one time zone (time specified by Ensemble LTO);

1: several time zones.

###Ensemble LTO (Local Time Offset): this 6-bit field shall give the Local Time Offset (LTO) for the ensemble. It is expressed in multiples of half hours in the range -12 hours to +12 hours. bit b5 shall give the sense of the LTO, as follows:

0: positive offset;

1: negative offset.

###Ensemble ECC (Extended Country Code): this 8-bit field shall make the Ensemble Id unique worldwide. The ECC shall be as defined in TS 101 756 [16], tables 3 to 7.

###Inter. (International) Table Id: this 8-bit field shall be used to select an international table. The interpretation of this field shall be as defined in TS 101 756 [16], table 11.

##Extended field: this n × 8-bit field shall contain one or more sub-fields, which define those services for which either their associated LTO or ECC, or both, differ from that of the ensemble. The maximum length of the extended field is 25 bytes. The following definitions apply to each sub-field:

###Number of services: this 2-bit field, expressed as an unsigned binary number, shall indicate the number of services (in the range 0 to 3) contained in the subsequent SId list;

###LTO (Local Time Offset): this 6-bit field shall be coded in the same way as the Ensemble LTO;

###ECC (Extended Country Code): this 8-bit field shall be coded in the same way as the Ensemble ECC;

###SId (Service Identification): this 16 or 32-bit field shall identify the service, see clause 6.3.1.

The database key comprises the OE and P/D flags (see clause 5.2.2.1) only.

The Change Event Indication (CEI) is signalled by the Ext. flag = 1, the Number of services field = 0, and the LTO field = 0.