Atsc working Draft Template
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dcc_selection_id
– This 64-bit unsigned integer contains the data identified by the dcc_selection_type field that has been described above in each of the case descriptions and summarized in Table 6.17. dcc_term_descriptors_length – A 10-bit unsigned integer number that indicates the number of bytes of optional DCC term descriptors (if any) to follow. DCC term descriptors are an expansion mechanism allowing, in a future revision of this protocol, additional data to be associated with a given term. At present, no descriptors are defined for such use. The DCCRR shall disregard any descriptors encountered. dcc_term_descriptor() – A data structure in standard descriptor format (tag, length, data) that provides additional information about the term defined in this iteration of the dcc_term_count “for” loop. dcc_test_descriptors_length – A 10-bit unsigned integer number that indicates the number of bytes of optional DCC test descriptors (if any) to follow. DCC test descriptors can provide an additional piece of data to be associated with a given test. At present, two descriptors are defined for such use, the dcc_departing_request_descriptor() defined in Section 6.9.11 and the dcc_arriving_request_descriptor() defined in Section 6.9.12. The DCCRR shall disregard any unsupported descriptors encountered. dcc_test_descriptor() – A data structure in standard descriptor format (tag, length, data) that provides additional information about the test defined in this iteration of the dcc_test_count “for” loop. dcc_additional_descriptors_length – A 10-bit unsigned integer number that indicates the number of bytes of optional DCC additional descriptors (if any) to follow. DCC additional descriptors are an expansion mechanism allowing, in a future revision of this protocol, additional data to be associated with a given DCC table section. At present, no descriptors are defined for such use. 62 ATSC A/65:2013 Program and System Information Protocol 7 August 2013 Download 4.82 Kb. Do'stlaringiz bilan baham: |
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