数字电视规范精华总汇.ppt

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1、数字电视规范精华总汇Psi/SiPID0x0_PAT;0x1_CAT;PAT描述_PMT;0x10_NIT;0x11_SDT;0x12_EIT;0x14_TDT;Table_id0x0_PAT;0x1_CAT;0x2_PMT;0x40_NIT;0x42_ActualSDT;0x46_Other_SDT;0x4E_ActualPF;0x4F_OtherPF;0x50到0x5F_Actual_Schedule;0x60到0x6F_Other_Schedule;0x70_TDT;0x73_TOT;0x4a_BAT;周

2、期0.1_PAT;无_CAT;0.1_PMT;10_NIT;2_ActualSDT;10_OtherSDT;2_EITActual;10_EITOther;10_EITActualSchedule;30_EITOtherSchedule;30_TDT;30_TOT;10_BAT;transport_packettransport_packet(){syn_byte//80x47mpeg2transport_error_indicator//11表示相关包至少有不可纠正的错误位；0无transport_unit_

3、start_indicator//1PES1有效净荷以PES包第一个字节开始，0开始不是PES；PSI1带PSI的第一个字节，0不带有第一个字节；空包也是0transport_priority//11比其它同PID的优先级高PID//130PAT1CAT10NIT1FFF空transport_scrambling_control//200未加扰011011adaptation_field_control//200预留（计算器不增加）01无调整字段184有效10无有效净荷183调整字段（计算器不增加）110~18

4、2调整字后有效continuity_counter//4计算器if(adaptation_field_control=='10'

5、

6、adaptation_field_control=='11'){adaption_field()}if(adaptation_field_control=='01'

7、

8、adaptation_field_control=='11'){for(i=0;i

9、on_section(){table_id//80x0section_syntax_indicator//10x1'0'//1reserved//2section_length//12section字节数（从transport_stream_id到CRC不超过1021）transport_stream_id//16reserved//2version_number//5版本号变化+1，到31循环回到0current_next_indicator//11当前表有效，0无效section_number//8当前se

10、ction号,当section_number=last_section_number表示此section是表中最后一个last_section_number//8最后一个section号，即表中最大的section号for(i=0;i

11、S_program_map_sectionTS_program_map_section(){table_id//8section_syntax_indicator//1'0'//1reserved//2section_length//12program_number//16reserved//2version_number//5current_next_indicator//1section_number//8last_section_number//8reserved//3PCR_PID//13reserve

12、d//4program_info_length//12for(i=0;i