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TBS Technologies International Ltd.
http://www.tbsiptv.com | http://www.tbsdtv.com | sales@tbsdtv.com
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Product Overview: ............................................................................................................................................. 1
Key Features: ..................................................................................................................................................... 1
Download and build the Linux driver: ............................................................................................................... 2
Configure input source: ..................................................................................................................................... 2
Remux and generate the channels into ISDB-T streams ................................................................................... 3
Modify ISDB-T and Layers Parameters: ............................................................................................................. 4
Product Overview:
TBS ISDB-T Quad modulator PCIe Card works as an ISDB-T signal generator. It supports to be fed with DVB
resource, HDMI videos, IP streams or any other digital resources, and then output ISDB-T signal in 4 Frequencies.
For example, you can use a TBS DVB-S2 TV tuner card to receive satellite TV channels and then use TBS ISDB-T
Modulator card to convert these channels into ISDB-T signal.
Key Features:
TS input only (one by layer)
PCR re-stamping
3-Layer (A, B and C) modulator
Configurable Convolutional Rate
Programmable DQPSK, QPSK, 16-QAM and 64-QAM Symbol Mapping
Configurable support for 2k, 4k and 8k OFDM modes (modes 1, 2 & 3)
Programmable Guard Interval (1/4, 1/8, 1/16, 1/32)
Time Interleaving (length from 0 to 16)
Supports variable channel width 6MHz to 8MHz
Full 13-segment ISDB-T modulator
Complex baseband outputs (2 x 16 bits) @ Fsymbol rate
TBS6214 ISDB-T Quad Modulator PCIe Card – User Guide
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Download and build the Linux driver:
#wget https://www.tbsdtv.com/download/document/linux/media_build-2021-07-19.tar.bz2
#tar jxvf media_build-2021-07-19.tar.bz2
#cd media_build
#./install.sh
wait ...
more information, please refer to:
https://github.com/tbsdtv/linux_media/wiki
Download and install the WebUI:
#mkdir /opt/rootfs
#cd /opt/rootfs
1) Centos:
#wget
http://www.tbsdtv.com/download/document/tbs2951/rootfs-6004_6014_6104_690b_ISDBT-c
entos-1.0.0.7.tar.bz2
#tar jxvf rootfs-6004_6014_6104_690b_ISDBT-centos-1.0.0.7.tar.bz2
2) Ubuntu
#wget
http://www.tbsdtv.com/download/document/tbs2951/rootfs-6004_6014_6104_690b_ISDBT-u
buntu-1.0.0.7.tar.bz2
#tar jxvf rootfs-6004_6014_6104_690b_ISDBT-ubuntu-1.0.0.7.tar.bz2
#./update.sh
Configure input source:
TBS6214 ISDB-T modulator is designed to convert spts/mpts which generated from TBS DVB-S/S2 card,
DVB-T2/T card, network IP, or local SPTS file to ISDB-T signal. Then you can use ISDB-T STB to receive and
play the channels directly.
TBS Adapters --- Only DVB-S2/S Card supported currently.
Network TS --- HTTP, UDP, RTP supported
Local Files (SPTS) ---
Video format: MPEG-1 MPEG-2 MPEG-4 H264 H.265
Audio format: MPEG-1 MPEG-2 AAC_ADTS AAC_LATM A52 (aka AC3)
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Remux and generate the channels into ISDB-T streams
TBS ISDB-T Modulator card has 4 modulators, as long as the first mod is set with frequency, the other mod
will be set automatically by adding its Bandwidth one by one.
The Level number 0-255 corresponds to standard dBm value as the following table.
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Modify ISDB-T and Layers Parameters:
Click TMCC Parameters, the following dialog will be shown. The settings should be done before playing
operation.
1. Assign the selected PID to each layer: At PIDs table, click the last column labeled “Layers” to select “A”,
“B” or “C”.
2. “Partial reception” is for one segment transmission, considering the serious receiving condition, such
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as low receiving antenna height, low antenna gain and signal level fluctuation, more strong transmission
parameter is desirable, that is QPSK.
3. In hierarchical transmission system, strongest layer is named "A", next is "B".
As mentioned above, in hierarchical transmission system, it is possible to select adequate transmission
parameter according to reception. That means when “One-Seg” is using, Layer A must be set to 1 segment.
4. The only allowed segment configurations are three of the following:
Layer A
Layer A + Layer B
Layer A + Layer B + Layer C
All other combinations are not allowed and the sum of these segments is 13.
Caution: If the “Data Rate” is higher than “Layer Bitrate”, edit the Layers and PID selected until the
“Data Rate” is lower than “Layer Bitrate”.
Total Bitrate for ISDB-T modulator:
𝑇𝑜𝑡𝑎𝑙𝐵𝑖𝑡𝑟𝑎𝑡𝑒 = 𝐿𝑎𝑦𝑒𝑟𝑅𝑎𝑡𝑒(𝐴) + 𝐿𝑎𝑦𝑒𝑟𝑅𝑎𝑡𝑒(𝐵) + 𝐿𝑎𝑦𝑒𝑟𝑅𝑎𝑡𝑒(𝐶)
5. Maximum Data rate is about 30.979 Mbps for a 8 MHz channel.
6. Each layer can be configured with up to 30 PID.
7. “Analysis”: analysis the TS that you give to the transponder, give more detailed TS information and you
can set different pids to each Layers.
8. “Reset Core”: Change all parameters to settings of TMCC information including TS, the settings by
default value.
9. “Load”: After changing any parameters and PIDs table, please, click “Load” button to make them work.
10. The following ISDB-T parameters can be changed through the interface:
Parameter
Default Value
Comment
Mode
8K
1 (2K), 2 (4K) or 3 (8K)
Guard Interval
1/32
1/32, 1/16, 1/8 or 1/4
Constellation Layer A
64QAM
DQPSK, QPSK, 16QAM or 64QAM
FEC Layer A
7/8
1/2, 2/3, 3/4, 5/6, 7/8
Time Interleaver Layer A
8
Depends on the configuration (from 0 to 16)
Segment Layer A
13
(For one layer, 1 to 13 is the only acceptable value)
Constellation Layer B
x
DQPSK, QPSK, 16QAM or 64QAM
FEC Layer B
x
1/2, 2/3, 3/4, 5/6, 7/8
Time Interleaver Layer B
x
Depends on the configuration (from 0 to 16)
Segment Layer B
x
(For one layer, 1 to 12 is the only acceptable value)
Constellation Layer C
x
DQPSK, QPSK, 16QAM or 64QAM
FEC Layer C
x
1/2, 2/3, 3/4, 5/6, 7/8
Time Interleaver Layer C
x
Depends on the configuration (from 0 to 16)
Segment Layer C
x
(For one layer, 1 to 11 is the only acceptable value)
11. Time Interleaver (for each layer): 0,1,2,4 or 0,2,4,8 or 0,4,8,16 (depending on OFDM mode), the
corresponding value is from 0 to 3.
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