Atsc working Draft Template
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- Table 4.1
4. DATA STRUCTURE
This section describes PSIP data structures (tables and descriptors), extensibility features, and expected usage. 4.1 Table Format Tables defined in this Standard are derived from the “long” form of the MPEG-2 private_section defined in sections 2.4.4.10 and 2.4.4.11 of ISO/IEC 13818-1 [13]. The table format common to 6 Note that this definition of table constrains version-number to apply to the collection of sections as contrasted to each section. 17 ATSC A/65:2013 Program and System Information Protocol 7 August 2013 all PSIP tables is given in Table 4.1. An additional field, protocol_version , has been added as a consistent first byte of every PSIP table section. Table 4.1 Generic Table Format Used in PSIP Syntax No. of Bits Format PSIP_section() { table_id 8 uimsbf section_syntax_indicator 1 ‘1’ private_indicator 1 ‘1’ reserved 2 ‘11’ section_length 12 uimsbf table_id_extension 16 uimsbf reserved 2 ‘11’ version_number 5 uimsbf current_next_indicator 1 bslbf section_number 8 uimsbf last_section_number 8 uimsbf protocol_version 8 uimsbf PSIP_table_data() * CRC_32 32 rpchof } table_id – The value of this 8-bit field shall identify the PSIP Table to which this section belongs. Tables defined in this PSIP Standard, and any created in other ATSC Standards are considered “private” with respect to ISO/IEC 13818-1 [13] and standard with respect to other ATSC Standards. Table 4.2 lists Table ID ranges and values. 18 ATSC A/65:2013 Program and System Information Protocol 7 August 2013 Download 4.82 Kb. Do'stlaringiz bilan baham: |
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