8 x ISDB-T Tunners to IP model description

8 ISDB-T to IP TS gateway. 8 independent off-air ISDB-T inputs to IP TS SPTS multicast or unicast outputs. PN H-8ISDBT-IP Each TS program - "subchannel" from any ISDB-T channel can be converted to an IP stream - UDP/RTP/RTSP

Description

H-8ISDB-T-IP 8 Channel ISDB-T Terrestrial Antenna RF to IPTV Gateway

The Thor Broadcast H-8ISDB-T-IP is a professional 8 tuner ISDB-T terrestrial broadcast gateway designed to receive digital TV signals from an off-air antenna and convert the selected TV services into IPTV streams for distribution over a LAN network. This model is made for countries using ISDB-T or ISDB-T International, also known in some regions as ISDB-Tb or SBTVD.

ISDB-T stands for Integrated Services Digital Broadcasting - Terrestrial. It was originally developed in Japan for digital terrestrial television and later expanded internationally, especially across Latin America. The standard is known for its segmented transmission structure, mobile reception support, and stable performance in challenging terrain and urban environments.

ISDB-T Antenna Broadcasts to IPTV

The H-8ISDB-T-IP receives ISDB-T RF channels from a rooftop antenna, MATV antenna system, or terrestrial RF distribution network. Each of the 8 tuners can be assigned to a different ISDB-T RF channel. Once the unit locks to the selected broadcast frequencies, it reads the transport stream inside each channel and makes the available TV services ready for IP output.

This allows local ISDB-T broadcast channels to be delivered to IPTV set-top boxes, smart TV decoders, monitoring computers, digital signage players, IPTV servers, or other network video devices. Instead of placing a separate ISDB-T receiver at every display, the RF reception can be centralized in the headend and distributed over Ethernet.

What Is ISDB-T?

ISDB-T is a digital terrestrial television system used for free-to-air broadcast TV. Like ATSC, DVB-T/T2, and other terrestrial standards, ISDB-T uses antenna RF signals, but it has its own modulation structure and receiver requirements. One important feature of ISDB-T is that each 6 MHz channel is divided into 13 segments, allowing different types of services to be carried inside the same RF channel.

In many markets, ISDB-T can carry HDTV, SDTV, audio services, data broadcasting, and mobile/portable services. The mobile portion is commonly known as 1-Seg, which was designed for handheld and portable reception. ISDB-T also supports emergency warning broadcast features in countries where that function is implemented by broadcasters.

Where ISDB-T Is Used

ISDB-T is strongly associated with Japan and Latin America. Japan developed the original ISDB-T standard, while Brazil developed the international version often called ISDB-Tb or SBTVD. Many Latin American countries adopted this international version for digital terrestrial television. ISDB-T has also been adopted or selected in parts of Asia and a few African markets. Always confirm the customer’s local broadcast standard before ordering, because ISDB-T receivers are not interchangeable with ATSC, DVB-T/T2, QAM, or DVB-S/S2 systems.

Examples of Countries Using ISDB-T or ISDB-T International

Asia: Japan, Philippines, Maldives, Sri Lanka
South America: Brazil, Argentina, Chile, Peru, Uruguay, Venezuela, Ecuador, Bolivia, Paraguay
Central America: Costa Rica, Nicaragua, Guatemala, Honduras, El Salvador
Africa: Botswana, Angola

Some countries may be in partial deployment, regional rollout, or transition from older analog systems. For professional system design, the RF channel plan, modulation format, and local broadcaster configuration should be verified before installation.

Typical ISDB-T Frequency Range

ISDB-T terrestrial broadcasts commonly use UHF television spectrum. The exact channels depend on the country, but ISDB-T is commonly associated with 6 MHz RF channels in the UHF band.

Common UHF range: approximately 470 MHz to 770 MHz
Brazil and some ISDB-Tb systems: may extend higher depending on local allocation, historically up to around 806 MHz
Channel bandwidth: typically 6 MHz
Transmission structure: 13 segments inside one 6 MHz RF channel
Modulation: BST-OFDM structure with modes such as QPSK, 16QAM, or 64QAM depending on broadcaster settings

Because spectrum rules vary by country, the actual usable RF range may be different in each market, especially where upper UHF channels have been reassigned to mobile broadband services.

How the H-8ISDB-T-IP Works

An ISDB-T antenna system receives the local terrestrial TV broadcasts and sends the RF signal by coax to the H-8ISDB-T-IP. The unit tunes up to 8 ISDB-T RF channels, demodulates the transport streams, identifies the available services, and outputs the selected programs as IPTV streams through the Ethernet port.

The IP streams can be configured for multicast distribution when many endpoints need the same channel lineup, or unicast delivery for direct streaming to individual devices. In larger IPTV systems, managed network switches with proper IGMP support are recommended for reliable multicast performance.

Advantages of ISDB-T to IP Conversion

Receives local ISDB-T antenna channels in one centralized headend
Converts terrestrial RF broadcasts into IPTV streams for LAN distribution
Reduces the need for separate ISDB-T receivers at each display location
Allows selected services from each RF channel to be streamed individually
Useful for Latin American, Japanese, and other ISDB-T based TV systems
Supports hybrid systems where local broadcast TV is added to an IPTV lineup
Maintains the original broadcast stream without unnecessary video re-encoding
Works well for hotels, campuses, government facilities, telecom rooms, and private IPTV networks

Important Model Selection Note

The H-8ISDB-T-IP is for ISDB-T terrestrial antenna signals only. It is different from the H-8ATSC-IP for North American 8VSB off-air TV, the H-8DVB-T-IP for DVB-T/T2 regions, the H-8QAM-IP for clear cable QAM, and the H-8DVBS-IP for satellite DVB-S/S2. The correct model must match the actual RF broadcast standard used in the installation country.

Key Features

Model: H-8ISDB-T-IP
8 independent ISDB-T terrestrial RF tuners
Receives ISDB-T or ISDB-T International antenna broadcasts
Converts selected TV services to IPTV streams
Designed for terrestrial off-air RF input, not cable or satellite input
Supports IP transport stream output over Ethernet
Supports UDP, RTP, and RTSP streaming
Supports multicast and unicast IPTV delivery
Can output selected programs from each tuned ISDB-T RF channel
Supports SPTS and MPTS operation depending on configuration
Pass-through gateway design with no video re-encoding
Supports the incoming video and audio formats present in the broadcast stream
Includes ASI input and ASI output for professional headend integration
Web browser control for tuning, service selection, monitoring, and IP setup
1RU rackmount chassis for professional headend installation

Typical Applications

ISDB-T off-air antenna TV to IPTV conversion
Brazilian and Latin American terrestrial TV over LAN
Japanese ISDB-T broadcast monitoring and redistribution
Hotel, campus, hospital, school, and enterprise IPTV systems
MATV antenna system to IP network conversion
Adding local ISDB-T broadcast channels to IPTV headends
Government, telecom, and commercial building TV distribution
Centralized RF reception for multiple IP viewing devices

H-8ISDB-T-IP Summary

The Thor Broadcast H-8ISDB-T-IP is an 8 tuner ISDB-T antenna RF to IPTV gateway for professional terrestrial TV distribution. It receives ISDB-T broadcast channels from an antenna system and converts the selected services into multicast or unicast IP streams for LAN delivery. With 8 RF tuners, SPTS/MPTS support, ASI connectivity, web-based management, and a compact 1RU rackmount design, the H-8ISDB-T-IP is a practical solution for ISDB-T countries that need to move local terrestrial TV into an IPTV network.

ISDB-T was developed in Japan, while Brazil’s ISDB-T International version is widely used in Latin America; common references list Japan, the Philippines, Brazil, Argentina, Chile, Peru, Uruguay, Costa Rica, and others as ISDB-T markets. ISDB-T commonly uses 6 MHz channels in the UHF band around 470 to 770 MHz, with a 13-segment transmission structure

Tags: Coax Multiplexer

Features

8 Tuners (DVB-S2/DVB-T)
8 Tuners (ATSC)
8 Tuners (QAM)
8 Tuners (ISDB-T)
QAM-256/64 & ATSC (8VSB) formats supported
IP TS output
MPTS over UDP, RTP/RTSP output as a mirror of ASI output (RJ45)
SPTS optional as well
2 ASI inputs mean it can also be used as a dual ASI to IP gateway
Integrated demodulating and multiplexing functions
Select which channels to stream out via SPTS
Multiplex one program to all outputs
Closed captions supported
Full IP control and network management through a browser
IPTV output: Unicast or Multicast IGMP UDP
Low latency available: 10-20ms
AC3, MPEG2 audio
MPEG2 video or MPEG4 H.264
Perfect Full HD video quality - No loss
2-year warranty

Drawings

Model Selection

Model	Description	Input
H-8ATSC-IP	8 x ATSC Antenna Tuners to IPTV	8 x ATSC Antenna
H-8QAM-IP	8 x CABLE QAM Tuners to IPTV	8 x CABLE QAM
H-DVBS2-IP	8 x Satellite S2 Tuners to IPTV	8 x Satellite S2
H-DVB-T-IP	8 x DVB-T Tuners to IPTV	8 x Satellite S2
H-ISDB-T-IP	8 x ISDB-T Tuners to IPTV	8 x Satellite S2
H-8ATSC-IP-8ATSC H-8ATSC-IP-8QAM H-8QAM-IP-8ATSC H-8QAM-IP-8QAM H-8DVBS-IP-8ATSC H-8DVBS-IP-8QAM H-8DVBS-IP-8DVBT H-8DVBT-IP-8QAM	8 ATSC to 8 ATSC and IP out 8 ATSC to 8 QAM and IP out 8 QAM to 8 ATSC and IP out 8 QAM to 8 QAM and IP out 8 DVBS/S2 to 8 ATSC and IP out 8 DVBS/S2 to 8 QAM and IP out 8 DVBT to 8DVB-T and IP out 8 DVBT to 8QAM and IP out

Accessories & Upgrades

Specification

*All Specifications Subject to Change Without Notice
Input	PN: H-8ATSC-IP PN: H-8QAM-IP PN: H-8DVBS-IP PN: H-DVB-T-IP PN: H-ISDB-T-IP	8 x ATSC Antenna 8 x Cable QAM 8 x Satellite S2 8 x DVB-T Antenna 8 x ISDB-T Antenna
Supported Resolutions	All HD and SD
Video Codecs	MPEG-2 HD 1.5-19.5 Mbps H.264 HD 0.8-19.5 Mbps
Audio Codecs	MPEG-1 Layer II MPEG-2 AAC MPEG-4 AAC AC3 Dolby
Audio Sample Rate	48 kHz
Audio Bit Rates	64 kbps, 96 kbps, 128 kbps, 192 kbps, 256 kbps, 320 kbps
Modulation Standard	ATSC, DVB-C, DVB-S2 (model dependent)
RF Frequency Range	30-960 MHz for QAM and ATSC, 850-2100Mhz for L-band
Input RF Power Level	5-35 dBmV
IPTV Output	MPTS over UDP, RTP/RTPS out as mirror of ASI output (RJ45)
Power Input	100-240 VAC Auto-Switching ~ 20 W
Dimensions	19 x 9 x 3 Inches
Weight	6 Pounds
Operating Temperature	32-110 F

Question and Answers

Question:
We currently have one unit that does what we are looking for, but we are currently experiencing some issues and would also like to have another vendor option so we are not locked into just this one piece of equipment. So, just a quick recap of what we discussed regarding what we're looking for in this encoder. We need it to be capable of receiving 8 separate ATSC and/or QAM signals. Each input should be capable of outputting all of the programs or cherry-picking individual programs and outputting simultaneously to a QAM modulator and IP address, which can support unicast or multicast. Each output should have a dedicated QAM channel and IP address and port #. The QAM modulator should output 8 RF carriers and provide a minimum of 25dBmV, but preferably 40dBmV. EAS is also a big one for us. We would like the EAS to be able to override the current programs with the EAS message when the EAS alert is detected. Our EAS is a multicast stream with a dedicated port #, and when this dedicated multicast IP and port # is detected, it automatically overrides all programs with the EAS message for the duration of the EAS message. We have some equipment that is capable of just detecting the EAS stream and overriding the programs that way, and other equipment requires a trigger in the form of a dry contact along with the EAS IP stream. I imagine that is software related.

Answer:

This is the perfect solution for you: 8 x ATSC or Satellite Antenna Tuners to IPTV & ASI Output H-8QAM-IP H-8ATSC-IP. Or this one: 4 x Satellite or ATSC IRD Decoder to IP, ASI H-IRD-V4-ATSC H-IRD-V4-QAM. This is a link: https://thorbroadcast.com/product/4-x-satellite-or-atsc-ird-decoder-to-ip-and-8230.html

Question:
I need a device that will intake the OTA signal and convert it to QAM output. Need 16 or 32 QAM. Also, I need information on the 16 QAM to IP

Answer:
We have 16 RF tuners to IP and 16 tuners to IP + RF Out They can be configured and ordered with different modulation type tuners. One group converts RF to IP only The second RF to IP and RF out (it works as an IP gateway and RF to RF transmodulator) Please find my answers below: I need a device that will intake the OTA signal and convert it to QAM output. Need 16 or 32 QAM. The best unit to do that is H-16ATSC-IP-16QAM: 16 ATSC to 16 QAM and IP out https://thorbroadcast.com/product/16-rf-tuners-to-iptv-ts-qam-output.html/116 Also, I need information on the 16 QAM to IP and product for OTA signal to QAM H-16QAM-IP - 16 QAM to IP Gateway OTA signal to QAM H-16ATSC-IP-16QAM: 16 ATSC to 16 QAM and IP out

Question:
I want a device that takes analogue and digital (QAM 32,256) through cable and gives output in the form of SPTS IP

Answer:
Yes, the ideal product for QAM to IP. The unit has 16 independent tuners; it can be tuned to any QAM frequency. Any program muxed on this frequency will be available as a UDP multicast SPTS stream. https://thorbroadcast.com/product/16-rf-tuners-to-iptv-ts-qam-output.html/117 Please check and let me know if that would work for you. However, unfortunately, we do not make any gateways that convert Analog NTSC RF to IP. For the analog channels, those would need to be decoded to CVBS video/audio or to HDMI using Analog STBs and connected to the video encoders like this one: H-4ADHD-QAM-IP-LL 4ch CVBS or HDMI inputs https://thorbroadcast.com/product/4-hdmi-component-hd-to-coax-and-iptv-hd-8230.html/21 4-24ch HDMI encoders: https://thorbroadcast.com/product/4-8-16-24-hdmi-iptv-streaming-8230.html/216

Question:
I'm interested in using an RF to IP gateway and have a few questions about its setup: If I connect a single coaxial cable from a high-powered antenna (which picks up all available over-the-air ATSC channels) to the RF input of the gateway, will the device be able to detect multiple OTA channels, such as Channel 2 and its subchannels, as well as Channels 4, 5, 11, and their subchannels? Can it break these channels into separate IP streams? I've seen a setup where an Ethernet line connects to a switch, and from the switch, multiple feeds go to tuners or TVs. In this case, does the switch need to be an unmanaged switch, or does it need to support specific protocols for the network to function correctly?

Answer:
The ATSC model will pick up all the minor channels behind the major channel. The OTA inputs can be set to any non-adjacent carrier and converted to IP UDP unicast, multicast streams. You can use an unmanaged switch; but that is more relevant to how you plan on using the device. Generally speaking, all modern switches come equipped with all the necessary means to ensure interoperability. You can plug in multiple Gateways into a switch as well. Specifically, the options with this model are UDP, RTP and RTSP. Your network should be able to handle that, but also make sure you have the bandwidth available (depending on how many OTA channels you decide to convert to IP).

Question:
I'm looking at the H-8ATSC-IP product. We want to receive off air from broadcast stations and cherry pick selected subchannels for transport to a transmitter site via a private IP radio link which is capable of about 100 Mbps. I'm not sure what to do at the receive end but we need to feed ATSC 1.0 into an exciter. This exciter has ASI and TSoIP inputs. We would like to put as many programs as possible through the system. H.264 encoding?

Answer:

Thanks for reaching out about the H-8ATSC-IP.

This is simply a gateway, you would not be able to change any of the data rates of video protocols. However you can cherry pick your channels from 8 Major's of your choosing. We do have IP to RF Edge QAM devices, but if your Exciter only accepts ASI and TSoIP, then I would think you can use the UDP or RTP streams from the 8ATSC-IP model. However all of this would still remain in MPEG2, the original CATV channels you pull from the OTA. If you want those channel in H264 you would need to decode then encode those particular channels. There isn't an efficient or easy way to transcode at a high density, I would think that you would want to do that prior to hitting your IP radio link so you can subsequently capture more sub-channels prior to the IP conversion. There is a rather common solution, albeit not elegant; utilizing standard STB's to capture the RF ATSC programs, output via HDMI and into high density encoders which output H264. https://thorbroadcast.com/product/qam-catv-rf-and-atsc-rf-to-hdmi-decoder-stb-8230.html https://thorbroadcast.com/product/4-8-16-24-hdmi-iptv-streaming-8230.html/216