Atsc working Draft Template
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- Table 6.17
dcc_term_count
– This 8-bit unsigned integer specifies the number of dcc_selection_types and dcc_selection_ids to be associated with the DCC request. If the dcc_term_count is greater than one, the result of each dcc_selection_type in the "for" loop shall be evaluated as an intermediate term and then all intermediate terms for each dcc_selection_type logically ANDed together to determine the final result. If the final result is True (all terms evaluate True) a DCC channel change shall be indicated, otherwise no channel change shall be indicated. If it is desired to perform a combinatorial OR of individual dcc_selection_types then these types can be included in separate iterations of the dcc_test_count "for" loop. Alternatively, separate DCC Table transmissions may be sent. A DCC request is eligible to be acted on whenever the DCCRR is tuned to the DCC From Channel Number, the current time is between the dcc_start_time and the dcc_end_time , and the result of evaluating and ANDing together all the terms in the dcc_term_count “for” loop is True. If one or more DCC requests in the loop are eligible to be acted on, the DCCRR shall act on the first eligible DCC request encountered in the loop. The action taken shall be tuning to the DCC To Channel Number. dcc_selection_type – This 8-bit unsigned integer specifies the type of the value contained in the dcc_selection_id. Values for dcc_selection_type shall be as defined in Table 6.17 (see next page). 51 ATSC A/65:2013 Program and System Information Protocol 7 August 2013 Table 6.17 DCC Selection Type Assignments dcc_selection_type Name and Meaning Download 4.82 Kb. Do'stlaringiz bilan baham: |
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