Atsc working Draft Template
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reserved 2 ‘11’ section_length 12 uimsbf dccsct_type 16 uimsbf reserved 2 ‘11’ version_number 5 uimsbf current_next_indicator 1 ‘1’ section_number 8 0x00 last_section_number 8 0x00 protocol_version 8 uimsbf updates_defined 8 uimsbf for (i=0; i< updates_defined; i++) { update_type 8 uimsbf update_data_length 8 uimsbf if (update_type == new_genre_category) { genre_category_code 8 uimsbf genre_category_name_text() var } if (update_type == new_state) { dcc_state_location_code 8 uimsbf dcc_state_location_code_text() var } if (update_type == new_county) { state_code 8 uimsbf reserved 6 ‘111111’ dcc_county_location_code 10 uimsbf dcc_county_location_code_text() var } reserved 6 ‘111111’ dccsct_descriptors_length 10 uimsbf for (j=0; j dccsct_descriptors() } } reserved 6 ‘111111’ dccsct_additional_descriptors_length 10 uimsbf for (i=0; i dccsct_additional_descriptors() } CRC_32 32 rpchof } 64 ATSC A/65:2013 Program and System Information Protocol 7 August 2013 table_id – This is an 8-bit field, which shall be set to 0xD4, identifying this table as the DCC Selection Code Table (DCCSCT). section_syntax_indicator – This 1-bit field shall be set to ‘1’. It denotes that the section follows the generic section syntax beyond the section length field. private_indicator – This 1-bit field shall be set to ‘1’. section_length – This is a 12-bit field that specifies the number of remaining bytes in this section that immediately follow the section_length field up to the end of the section, including the CRC_32 field. dccsct_type – A 16-bit unsigned integer field whose value specifies the type of DCC selection code information contained within the table section, and its syntax and semantics. Currently only dccsct_type value 0x0000 is defined. The DCCRR is expected to discard DCCSCT table sections with nonzero values of dccsct_type until such time as they are standardized and supported. version_number – This 5-bit field is the version number of the DCCSC Table identified by the combination of the table_id and dccsct_type fields. The version number shall be incremented by 1 modulo 32 when any field in this instance of the DCC Selection Code Table changes. The value of the version_number shall be identical to that of the corresponding entry in the MGT. Download 4.82 Kb. Do'stlaringiz bilan baham: |
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