Decontis - Solutions for Analysis and Monitoring of Mobile DTV and Digital TV broadcasts


T2-MI – Analyzer

Live Reception • Real-Time Analysis • SNMP based Monitoring of T2-MI Transport Streams

Application Note


  • SAMbuddy-T2MI is the most comprehensive T2-MI Analysis solution which turns your PC or laptop into a fully featured T2-MI analyser.
  • The comprehensive SNMP based monitoring capabilities of SAMbuddy-T2MI allow to establish powerful T2-MI monitoring solutions

At a Glance:

  • T2-MI reception via IP or ASI input
  • playback of recorded T2-MI streams
  • analysis and monitoring acc. TR 101290 v1.3.1(2014-07)
  • T2-MI TS and Super-Frame monitoring
  • signaling analysis L1-Pre, L1-Post, L1-Dyn,
  • support multi-PLP (MPLP)
  • parameter monitoring all PLPs simultaneously
  • Timestamp packet monitoring
  • real-time extraction of all PLPs and streaming them for further analysis
  • streaming entire MI-TS for further analysis
  • cross-check T2-MI parameters against modulator RF output
  • TS snapshot creation and in-depth analysis
  • threshold configuration for each single parameter via comfortable GUI
  • comprehensive data logging

T2-MI Input
  • IP
    • UDP unicast/multicast
    • RTP
  • ASI – support of various supplier, e.g
    • StreamLabs
    • DVEO
    • DekTec
  • File – play-back of recorded T2-MI streams

SAMbuddy-T2Mi supports both  streams with SI tables (PAT/PMT + PCR info) and without SI tables. For streams without SI tables the needed T2-MI PID can be defined manually.

SAMbuddy-T2MI Main Window

TR 101 290
  • T2MI_packet_type_error_1
  • T2MI_packet_type_error_2
  • T2MI_packet_count_error
  • T2MI_CRC_error
  • T2MI_payload_error
  • T2MI_plp_num_blocks_error
  • T2MI_transmission_order_error
  • T2MI_DVB-T2_Timestamp_error
  • T2MI_DVB-T2_Timestamp_discont_error
  • T2MI_T2_frame_length_error
  • T2MI_bandwidth_consistency_error
  • T2MI_DVB-T2_Timestamp_leap_second_error

Analysis acc. ETSI TR 101 290

  • T2-MI PID
  • T2-MI PID bit-rate
  • L1 packet bit-rate
  • Timestamp packet bit-rate
  • Baseband frame bit-rate

Analysis T2-MI TS

Super Frame
  • super-frame continuity counter
  • number of frames per super-frame
  • duration of the super-frame
  • stream ID
  • number of L1 packets per super-frame
  • number of Timestamp packets per super-frame
  • number of Baseband packets per super-frame

Analysis Super Frame

L1-Pre / L1-Post / L1-Dyn Signaling

All parameters of the L1-Pre, L1-Post and L1-Dyn signaling parts according ETSI specification EN 302 755 can be monitored, e.g.

  • current frequency
  • Cell-ID, Network-ID, T2-System ID
  • duration of the super-frame
  • Transmission Mode
  • CodeRate, Modulation, FFT
  • Guard, T2-Mode
  • number of frames per super-frame

Analysis L1-Pre Signaling

Analysis L1-Post Signaling

Analysis L1-Dyn Signaling

Timestamp Packet

All parameters of the Timestamp packet according ETSI specification EN 302 755 can be monitored, e.g.

  • Time mode
  • Bandwidth

Analysis Timestamp Packet


All parameters of each PLP according ETSI specification EN 302 755 can be monitored simultaneously, e.g.

  • PLP ID
  • PLP type
  • payload type
  • Group ID
  • Modulation
  • number of blocks

Analysis PLP Parameters


(1) The entire T2-MI Transport Stream can be streamed to a remote destination for further analysis tasks, e.g. MPEG analysis according ETSI TR 101 290.

(2) SAMbuddy-T2MI extracts all PLPs from the current T2-MI Transport Stream and each particular PLP can be streamed to a remote destination for further analysis tasks on all technical layers, e.g. MPEG, EPG, Subtitle, Audio/Video …

T2-MI TS + PLP Streaming

Cross-Check T2-MI and Modulator RF Output
Service and network providers have to check whether the parameters of the RF output signal of the transmitter corresponds to the parameters of the T2-MI input signal.
With decontis solutions such a check can be realized very easily. The figure on the right shows a typical application. In the head-end a decontis monitoring probe receives the T2-MI signal via IP or ASI interface and in the field one or more decontis monitoring probes receive the DVB-T2 signal via RF receivers. On the field monitoring probes the SAMbuddy-RF application is running and in the head-end probe the application SAMbuddy-T2MI is running. To get the RF parameters from a field monitoring probe, SAMbuddy-T2MI creates IP connections to the corresponding SAMbuddy-RF application(s). Beside the T2-MI parameters, SAMbuddy-T2MI receives and displays the current RF measurements from SAMbuddy-RF, e.g. Rx Level, BERaV, MER, PER …



PLP Real-Time Analysis & A/V Monitoring
The content of an extracted PLP can be streamed to the SAMcorder application via IP or IPC. SAMcorder provides a comprehensive real-time service analysis and monitoring on all technical layers:
• MPEG analysis acc. TR 101 290
• PID and Program Bit-Rates measurements
• EPG analysis and monitoring
• DVB Subtitle analysis and monitoring
• DVB Teletext analysis and monitoring
• DSMCC / MHP / HbbTV analysis and monitoring
• Conditional Access analysis

SAMcorder de-multiplexes the Audio/Video content from the PLP and can stream the A/V data to the Audio/Video wall SAMitor for visual monitoring. That way all TV programs carried within all PLPs within a T2-MI stream can be visualized lively in this video wall.

Additionally SAMcorder can also stream all Audio data to SAMloudio for a professional Loudness and Audio analysis. That way also all Audio services carried within all PLPs within a T2-MI stream can be analyzed/monitored lively right from the T2-MI stream.


SAMitor – A/V Monitoring

SAMloudio- Loudness Measurement

T2-MI TS Real-Time Analysis
The entire T2-MI Transport Stream can be streamed to SAMcorder, the central I/O processor and real-time analysis tool within the dvbSAM tool-set.SAMcorder is able to receive the TS via IP or IPC and provides a lot of analysis and monitoring features, e.g. MPEG analysis according TR 101 290 and PID bit-rate measurements. Furthermore recording and streaming features can be applied.

SAMcorder MPEG Analysis

SAMcorder PID Measurement

T2-MI TS Snapshot Analysis

During the live reception of a T2-MI Transport Stream a snapshot from the current stream can be generated and analyzed by the SAMalyzer application.  The size of the snapshot buffer is configurable.

The PLPs of the T2-MI snapshot are extracted and can be analyzed separately.

SAMalyzer – TS Snapshot

SAMalyzer – BB Frame Analysis

In following some applications and use cases are described in which SAMbuddy-T2MI can be used. In closer inter-action with other SW components of decontis product portfolio high-end solutions for analysis and monitoring of T2-MI multiplexes can be established.

T2-MI Head-End Monitoring

SAMbuddy-T2MI gets used in the Head-End in a T2-MI monitoring probe

  • the T2-MI multiplex gets received via ASI or IP
  • all T2-MI parameters are monitored continousely, 24/7 via SNMP
  • monitoring acc. TR 101 290 gets supported
  • optional, i.e. additional components necessary:
    • MPEG monitoring T2-MI TS
    • PLP de-multiplexing
    • monitoring of all PLPs on all technical layers (MPEG, EPG, Subtitle, DSM-CC, MHP, Audio, Video …)
Monitoring of T2-MI distribution

SAMbuddy-T2MI gets used in a RF monitoring probe

  • T2-MI gets distributed via satellite (DVB-S/-S2)
  • the T2-MI Transport Stream gets received via RF (SAMbuddy-RF)
  • the RF reception gets monitored 24/7 via SNMP
  • T2-MI parameters gets monitored 24/7 via SNMP
in-depth T2-MI Analysis

SAMbuddy-T2MI in the lab

  • use SAMbuddy-T2MI to play-back a recorded T2-MI Transport Streams
  • check all T2-MI parameters
  • optional, i.e. additional components necessary:
    • analyze all T2-MI frames up to the last bit (L1, BB, Time …)
    • de-multiplexing of all PLPs and analyze these on all technical layers  (MPEG, EPG, Subtitle, DSM-CC, MHP, Audio, Video …
PLP De-Multiplexing / Streaming / Distribution

SAMbuddy-T2MI gets used as distributor

  • T2-MI gets received via ASI or IP
  • SAMbuddy-T2MI de-multiplexes all PLPs
  • each single PLP can be distributed to remote locations via IP streaming
Cross-Check T2-MI Parameters vs. RF Signal

SAMbuddy-T2MI gets used for complex monitoring tasks

  • T2-MI gets received via ASI or IP in the head-end
  • in the field the DVB-T2 RF signal gets received
  • SAMbuddy-RF sends the received parameters via IP to SAMbuddy-T2MI
  • SAMbuddy-T2MI checks the received parameters from the demodulated RF signal against the modulator input
  • the result of this cross-check can be monitored via SNMP