4 Channel HDMI Encoder Modulator DVB-T ISDB-T DVB-C ATSC | HDMI to RF Digital TV Headend

4 Channel HDMI Encoder Modulator DVB-T ISDB-T DVB-C ATSC | HDMI to RF Digital TV Headend

Overview

The ISDBT2250 Series HDMI Encoder Modulator is a cost-effective and highly integrated digital TV headend solution designed for professional RF distribution systems. It combines HD video encoding, multiplexing, scrambling-ready architecture, modulation, and IP streaming functions into a single compact device.

Supporting 4 HDMI inputs (optional 8 HDMI version available), the unit converts HDMI video sources such as satellite receivers, media players, set-top boxes, surveillance systems, computers, and digital signage players into RF digital television channels compliant with DVB-T, DVB-C, ISDB-T, ATSC, or DTMB broadcasting standards.

With four independent RF carrier outputs, operators can distribute multiple HD channels through existing coaxial cable infrastructure without requiring additional wiring. The integrated Gigabit Ethernet interface supports MPTS and SPTS transport streams using UDP/RTP multicast protocols, enabling seamless integration with IPTV and hybrid RF/IP distribution networks.

The built-in On-Screen Display (OSD) function allows users to overlay logos, subtitles, station names, QR codes, emergency messages, advertisements, and promotional information directly onto video channels, making it ideal for hospitality and commercial broadcasting applications.

The ISDBT2250 series is widely used in hotels, hospitals, educational campuses, sports venues, government facilities, residential communities, cruise ships, correctional institutions, and corporate environments where reliable digital television distribution is required.

Features

Multi-Channel HDMI Encoding

• Supports 4 HDMI inputs as standard
• Optional 8 HDMI input version available
• Simultaneous encoding of multiple HD video sources
• Real-time H.264/MPEG-4 AVC video compression
• Low latency processing

Multiple Digital TV Standards

Selectable RF output standards include:

• DVB-T
• DVB-C
• ISDB-T
• ATSC
• DTMB

This flexibility allows deployment in different countries and regions without changing hardware platforms.

Four RF Carrier Outputs

• Supports 4 independent RF channels
• Flexible frequency allocation
• Efficient channel management
• Suitable for medium-sized TV distribution systems

Gigabit IP Streaming

• 1 x Gigabit Ethernet interface
• IP input and output support
• UDP protocol support
• RTP protocol support
• Multicast transmission
• MPTS output
• SPTS output

Advanced OSD Insertion

Supports custom overlay content including:

• Corporate logos
• Hotel branding
• QR codes
• Scrolling text
• Emergency announcements
• Promotional graphics
• Channel identification
• Watermarks

User-Friendly Operation

• Front LCD display
• Front panel control buttons
• Easy configuration interface
• Real-time monitoring

Web-Based Management

• Browser-based configuration
• Remote administration
• Network monitoring
• Parameter adjustment
• Device diagnostics

Online Firmware Upgrade

• Remote firmware updates
• Improved maintenance efficiency
• Future feature expansion
• Reduced operational downtime

High Integration Design

Combines:

• HDMI encoder
• Transport stream multiplexer
• RF modulator
• IP streamer
• Management system

into one compact platform.

Specifications

Video Input

Parameter	Specification
HDMI Inputs	4 Channels (Optional 8 Channels)
Input Connector	HDMI
Input Resolution	1920×1080P
Input Resolution	1920×1080i
Input Resolution	1280×720P
Input Resolution	720×576i
Input Resolution	720×480i
Frame Rate	50Hz / 59.94Hz

Video Encoding

Parameter	Specification
Video Codec	MPEG-4 AVC / H.264
Encoding Type	Real-Time Hardware Encoding
Bit Rate Range	1 Mbps – 13 Mbps per Channel
Rate Control	CBR / VBR

Video Output Resolution

Supported output formats include:

• 1920 × 1080 @ 50P
• 1920 × 1080 @ 30P
• 1280 × 720 @ 30P
• 720 × 576 @ 25P
• 720 × 480 @ 25P

Audio Encoding

Parameter	Specification
Audio Codec	MPEG-1 Layer II
Sampling Rate	48 KHz
Audio Bitrate	64 Kbps
Audio Bitrate	128 Kbps
Audio Bitrate	192 Kbps
Audio Bitrate	224 Kbps
Audio Bitrate	256 Kbps
Audio Bitrate	320 Kbps
Audio Bitrate	384 Kbps

RF Output

Parameter	Specification
RF Channels	4 Independent Carriers
Modulation Standards	DVB-T / DVB-C / ISDB-T / ATSC / DTMB
Frequency Configuration	Adjustable
Output Type	Digital RF Television Signal

ASI Interface

Parameter	Specification
ASI Output	2 Channels
Transport Stream	MPEG TS

IP Streaming

Parameter	Specification
Ethernet Interface	1 × Gigabit RJ45
Protocol	UDP
Protocol	RTP
Output Mode	MPTS
Output Mode	SPTS
Multicast Support	Yes

Management

Parameter	Specification
LCD Display	Yes
Front Panel Keys	Yes
Web Management	Yes
Remote Configuration	Yes
Online Upgrade	Yes

Applications

Hotels and Resorts

Distribute satellite TV, promotional channels, information channels, and entertainment content to guest rooms through existing coaxial cable networks.

Benefits:

• Lower infrastructure costs
• Centralized channel management
• Hotel branding through OSD
• Guest information broadcasting

Hospitals

Deliver educational programs, healthcare information, entertainment channels, and hospital announcements to patient rooms.

Benefits:

• Central content control
• Reliable signal distribution
• Emergency information broadcasting

Educational Institutions

Ideal for:

• Universities
• Colleges
• Schools
• Training centers

Applications include:

• Campus television
• Distance learning
• Lecture broadcasting
• Information channels

Corporate Buildings

Provide:

• Corporate communications
• Internal training channels
• Digital signage distribution
• Live event broadcasting

Sports Bars and Clubs

Distribute multiple HDMI sources from:

• Satellite receivers
• Sports decoders
• Media players

to multiple displays over RF infrastructure.

Government Facilities

Suitable for:

• Public information channels
• Emergency notification systems
• Internal communication networks

Residential Communities

Enable community television systems with:

• Local content channels
• Security camera channels
• Information broadcasting

Cruise Ships and Marine Applications

Reliable onboard TV distribution for:

• Entertainment
• Navigation information
• Passenger announcements

Customization Options

We provide OEM and ODM customization services for distributors, broadcasters, and system integrators.

Available customization options include:

Hardware Customization

• 4 HDMI version
• 8 HDMI version
• Different RF standards
• Customized frequency plans
• Additional IP features

Software Customization

• Customized firmware
• Special OSD functions
• Language localization
• Custom web interface

Branding Services

• Private label production
• Custom logo printing
• Customized packaging
• User manual branding

System Integration

• Headend project support
• IPTV integration
• CATV integration
• Network design consultation

Frequently Asked Questions (FAQ)

Q1: What does this encoder modulator do?

The device converts HDMI video sources into digital RF television channels and IP streams, allowing content distribution through coaxial cable networks and IPTV systems.

Q2: How many HDMI inputs are supported?

The standard model supports 4 HDMI inputs. An 8 HDMI version is also available.

Q3: Which RF standards are supported?

The unit supports:

• DVB-T
• DVB-C
• ISDB-T
• ATSC
• DTMB

depending on the selected model.

Q4: Can I distribute channels through both RF and IP simultaneously?

Yes. The device supports simultaneous RF output and IP streaming output.

Q5: Does the unit support multicast streaming?

Yes. UDP and RTP multicast transmission are supported.

Q6: Can I add my company logo to the video?

Yes. The built-in OSD function supports:

• Logos
• QR codes
• Text overlays
• Watermarks
• Advertisements
• Emergency messages

Q7: Is remote management available?

Yes. The encoder modulator includes a web-based management platform for remote configuration and monitoring.

Q8: What video codec is used?

The device uses H.264 / MPEG-4 AVC video compression for high efficiency and excellent picture quality.

Q9: Can existing coaxial cable infrastructure be used?

Yes. The system is specifically designed to work with existing RF distribution networks, minimizing installation costs.

Q10: Is this suitable for hotel TV systems?

Absolutely. This is one of the most common applications for the ISDBT2250 series, allowing hotels to create their own digital TV channel lineup and information channels.

Package Contents

• 1 × HDMI Encoder Modulator
• Power Supply
• User Manual
• Network Configuration Guide
• Quality Inspection Certificate

Why Choose the ISDBT2250 Series?

The ISDBT2250 Series delivers an excellent balance of performance, reliability, and affordability. By integrating HDMI encoding, multiplexing, RF modulation, and IP streaming into a single platform, it significantly reduces system complexity and deployment costs while providing professional-grade digital television distribution.

Whether you are building a hotel TV system, hospital broadcasting network, educational television platform, or commercial CATV headend, the ISDBT2250 offers a scalable and future-ready solution for modern digital content delivery.