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1-seg n

Use the settings under 1-seg n node to configure parameters for each segment when the super segment type is set to Type B.

Segment Configuration Table

1-seg n Setting Table

Segment Configuration Table

Seg No# shows the segment index in the current type B super segment.

Code Rate shows the code rate of the convolutional coder in the segment.

Modulation Type shows the modulation format used in the segment.

1-seg n Setting Table

1. Basic

Index

This cell displays the super segment index.

Segment Center Frequency

This cell displays the center frequency of the super segment.

Number of Segments

This cell displays the number of segments in the super segment.

Start Segment Number

Range: 0 to 32

Set the start segment number of the current super segment.

End Segment Number

Range: 0 to 32

This cell displays end segment number of the current super segment.

In this setting table, the value of the end segment number is the same to the start segment number.

2. ISDB-Tmm Segment Settings

RS Encoder

Choice: ON | OFF

Default: ON

Double-click or use the drop-down menu to enable or disable the RS encoder. If the RS encoder is off, the payload is treated as the output of a RS encoder and fed into the energy dispersal directly.

Layer A

This cell displays the settings of hierarchical layer A of the current super segment. There is only one layer in the 1-segment form.

Segment Count

This cell displays the number of segments assigned to this layer, which is 1 in the 1-segment form.

Code Rate

Choice: 1/2 | 2/3 | 3/4 | 5/6 | 7/8

Default: 2/3

Double-click or use the drop-down menu to select the code rate of convolutional coder in this layer.

Modulation Type

Choice: DQPSK | QPSK | 16QAM | 64QAM

Default: QPSK

Double-click or use the drop-down menu to select the modulation type in this layer.

I (Parameter for the Length of Time Interleaving)

Choice:

For Mode 1: 0 | 4 | 8 |16    

For Mode 2: 0 | 2 | 4 | 8     

For Mode 3: 0 | 1 | 2 | 4    

Default: 4

Double-click or use the drop-down menu to select the length of time interleaving in this layer. 

Max Rate

This cell displays the maximum bit rate in this layer.

Pattern Bits

Sets the user defined pattern. This cell is visible only when the Data Source Type is set to Test Pattern.

Click the right button to open Data Pattern Selection dialog and select test pattern to use.

Initial Synchronizing Signal

Choice: w0 | w1

Default: w0

An synchronizing signal is designed to establish synchronism between transmission and reception of a TMCC signal and an OFDM frame.

Double-click or use the drop-down menu to select the synchronizing signal used in TMCC.

Figure 1 Initial Synchronizing Signal in OFDM frame

Broadcasting Type

This cell displays the broadcasting type. For 1-segment form, it is always ISDB-Tsb.

ISDB-T: Digital terrestrial television broadcasting system, in which transmission bands consist of 13 OFDM segments;

ISDB-T_sb: Digital terrestrial television broadcasting system, in which transmission bands consist of one OFDM segments.

Center Sub-channel

Set the sub-channel number for the current segment. The initial value of the PRBS-generating circuit for the current segment is decided by the sub-channel number.

System Descriptor (TMCC B20-B21)

This cell displays system descriptor bits in TMCC from B20 to B21."00" stands for ISDB-T system. "01" stands for ISDB-T_sb system.

Indicator of Transmission Parameter Switching

Range: 0000 to 1111

Default: 1111

Set the indicator of transmission-parameter switching specified in TMCC B22 to B25.

Startup Control (TMCC B26)

Choice: ON | OFF

Default: OFF

Double-click or use the drop-down menu to set the start flag for emergency-alarm broadcasting which is specified in TMCC B26.

Next Information (TMCC B67-B106)

Set the next information, which includes the transmission parameters following switching. If the next information input is null, it will be the same as the current information.

Phase Correction (TMCC B107-B109)

Range: 00 to 11

Default: 00

Set phase correction bits in TMCC from B107 to B109. 

Reserved (TMCC B110-B121)

Range: 000000000000 to 111111111111

Default: 000000000000

Set reserved bits in TMCC from B110 to B121. 

AC Setup

Choice: Data Pattern Editor | AC Builder Tool

Default: Data Pattern Editor

Double-click or use the drop-down menu to select the generation method of AC bits.

AC

Click on the right side of the cell to set the AC information.

• If the AC Setup is set to Data Pattern Editor, a Data Pattern Selection dialog will be opened up to set the test pattern to be used as AC bits.

  

• If the AC Setup is set to AC Builder Tool, an ISDB-T AC Builder dialog will pop up. See the topic "Using the AC Builder Tool to generate the AC signal" for the detailed steps of using ISDB-T AC builder to configure the earthquake alarm information sent in the AC bits.  

  

  AC (Auxiliary Channel) is used to transmit additional information. AC1 is available in an equal number in all segments, while AC2 is available only in different modulated segments.

3. Data Source Settings

Useful Bit Rate

The useful bit rate. The bit rate can be transmitted by current encoding, modulation, and framing configurations.

Supported File Size

The supported file size for the current settings.

Re-Multiplexer

Choice: ON | OFF

Default: OFF

Double-click or use the drop-down menu to enable or disable the Re-Multiplexer.

Payload

The TS payload settings.

Data Source Type

Choice:

Normal: Test Pattern | Demo File | TS File | TS File Wizard

When RS Encoder is off: Test Pattern | TS File  

For one-seg ISDB-T: Test Pattern | TS File | TS File Wizard 

Default: Test Pattern

Double-click or use the drop-down menu to select which type to be used as the data source.

If TS File" is selected, "File Name" is required;

If "TS File Wizard" is selected, "File Wizard" is available. Following the steps in "Import the transport stream file" to customize your TS file.

To learn more about the different Data Source Types, refer to the topic "Data Source Type".

SYNC Insertion

Choice: True | False

Default: False

Double-click or use the drop-down menu to determine whether a SYNC byte (0x47) should be inserted into the test pattern. 

File Name

Click on the right side of the cell to load your desired TS file.

This cell is visible only when the Data Source Type is set to TS File.

Auto Stuffing

Choice: On | Off

Default: On

Double-click or use the drop down menu to select whether or not to use auto-stuffing to agree with the transport bit rate.

This cell is visible only when the Data Source Type is set to TS File.

Loop Play

Choice: On | Off

Default: On

Double-click or use the drop-down menu to determine whether or not to modify the TS file to make it suitable for loop play.

This cell is visible only when the Data Source Type is set to TS File.  

File Size

This cell displays the size of opened file.

Bit Rate

This cell displays the bit rate of the opened file.

Play Time

This cell displays the time that file can be played.

Related Topics

Carrier for ISDB-Tmm

Super Segment n

Using the AC Builder Tool to generate the AC signal