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Tree view - PIDs
This section of the Tree is only shown when the option "PSI only" in the Tree View menu is NOT enabled.
In this section each PID is represented, independent of the PSI information. That means some PIDs that are not present in the PSI are still shown.
For ease of recognition each PID gets assigned a name, based on the PSI information. This can look something like 'Nederland 1 ITU-T Rec. H.262 | ISO/IEC 13818-2 Video or ISO/IEC 11172-2 constrained parameter video stream, PCR for 1101 (Nederland 1)'. From the PSI it is concluded this PID contains the video Nederland 1, and also the PCR signal.
PSI data is shown as raw tables, without interpretation. This may assist in analyzing some private tables (like Conditional Access tables). Sometimes a PID contains PSI data, but not a valid table structure. For instance, for PID 21 on a DVB-T stream. This is used for network synchronization. The data for this PID is not shown.
RDS via UECP
For audio streams where a ancillary_data_descriptor in the PMT
indicates the presence of "RDS via UECP" data the UECP data is
Audio AC3 & E-AC3
EBU Data / Teletext / VPS / WSS
This shows data for PIDs that contain Vertical Blanking Information (VBI) according to EN 301 775. For streams of type 'private_stream_1', and the first byte of the PES packet (data_identifier) is between 0x10 to 0x1F or 0x99 to 0x9B. Be carefull, sometimes other private data is wrongly interpreted as EBU data, so the displayed information will be meaningless.
Sometimes teletext, VPS and WSS information is transmitted within a single PID, sometimes different PIDs are used.
In this section first the PES packets are shown in the order of transmission (the "RAW" data), then the interpretation of the EBU data is shown for teletext, VPS and WSS data.
Remember this is not a teletext decoder for viewing pages as they should be presented, but an analyzer, to show the logical structure of the data. For the details of teletext see EN 300 706.
Apart from the normal visible lines this page has two other lines, line 26 is used for special characters (it puts the è in carrière on line 14), line 27 specifies the destinations for the colored buttons at the bottom of the page.
teletext sub titles
VPS / WSS
This segment has the same structure as that of teletext/EBU data. First there is a section showing the PES-packets (the "RAW"-data). When a PES packet contains enough information for a complete Display Set a preview of the title will be shown on the right. The seconds section "Titles" shows complete "Display Sets", even when they span multiple PES-packets. Also for Display Sets of type "page update" it will show the complete title, also using segments defined in earlier Display Sets. (This mechanism is often used for subtitling live programs, where separate words are sent as an update to the title already on display.)
MPEG2 Video background
When possible DVB Inspector will try to show the actual video image as background for the title. For this the following conditions have to be statisfied;
When all these conditions have been met DVB Inspector will for each title find the closest I-Frame (based on the PTS).
This page was last modified on 11/10/2013