UHD-404VW Overview and Use Cases

What Is the UHD-404VW?

The OREI UHD-404VW is an 18Gbps 4x4 seamless UHD HDMI matrix with video wall processing. It allows up to four HDMI source devices to be routed to up to four HDMI displays.

The UHD-404VW can work as a standard 4x4 HDMI matrix, where each display can show the same or different HDMI source. It can also be used as a video wall processor, allowing multiple displays to be combined into a larger video wall layout.

The UHD-404VW supports HDMI 2.0 and HDCP 2.2, with a video bandwidth of 18Gbps. It supports video resolutions up to 4K@60Hz 4:4:4, seamless switching, video wall function, CEC management, audio matrix, IR matrix, external L/R audio insertion, EDID management, front-panel control, RS-232 control, TCP/IP LAN control, Web control, and PC tool control. 

The UHD-404VW is useful for professional AV setups, control rooms, restaurants, sports bars, retail displays, classrooms, conference rooms, houses of worship, and video wall installations where multiple HDMI sources need to be routed or displayed across multiple screens.

IMPORTANT — UHD-404VW Is a Matrix and Video Wall Processor

The UHD-404VW is not just a basic HDMI splitter.

It is a 4-input, 4-output HDMI matrix that can route any input to any output.

It also supports video wall processing, allowing selected displays to be combined into a larger display layout.

This makes the product useful for both normal HDMI routing and multi-screen video wall setups.

IMPORTANT — UHD-404VW Supports 4K@60Hz, Not 8K or 4K@120Hz

The UHD-404VW supports video resolutions up to 4K@60Hz 4:4:4.

It does not support 8K or 4K@120Hz.

For 8K or 4K@120Hz setups, use an HDMI 2.1 matrix or switch that supports the required bandwidth.

IMPORTANT — Video Wall Mode Is Not the Same as Computer Extended Desktop

The UHD-404VW can create video wall layouts across multiple connected displays.

However, it is not a computer docking station or KVM switch, and it does not create a multi-monitor extended desktop from one computer by itself.

Video wall mode is used to process and display HDMI video across multiple screens. If a computer needs true extended desktop operation, the computer or graphics card must provide the required display outputs.

IMPORTANT — Seamless Switching Is Supported

The UHD-404VW supports seamless switching.

This means switching between HDMI sources is designed to be faster and smoother than a basic HDMI matrix, reducing the long black-screen delay that can occur with standard HDMI switching.

This is useful in control rooms, commercial displays, live presentation spaces, and video wall environments where switching speed matters.

IMPORTANT — Audio Extraction and Audio Insertion Are Supported

The UHD-404VW supports both audio extraction and audio insertion.

Audio extraction allows audio from HDMI outputs to be sent to external audio systems through the audio output ports.

Audio insertion allows external analog L/R audio to replace or insert audio into the corresponding HDMI input stream.

For example, if HDMI Input 1 is set to use External L/R audio, the analog Audio Input 1 can replace the embedded HDMI audio for HDMI Input 1.

IMPORTANT — Analog Audio Input Behavior Depends on HDMI or DVI Signal

The manual notes two audio input behaviors:

If a source is connected as DVI or does not carry embedded HDMI audio, external analog audio can be used with the matching audio input.

IMPORTANT — IR Routing Follows Video Routing

The UHD-404VW supports IR matrix routing.

IR routing follows the HDMI video routing automatically.

For example, if HDMI Input 3 is routed to HDMI Output 1, then the IR signal from the Output 1 location can be routed back to the IR output for Input 3.

This allows the user near the display to control the source device currently assigned to that display.

IMPORTANT — Web / PC Tool Control Requires Network Setup

The UHD-404VW supports network control through LAN and Web control.

The factory default network settings are:

To use network control, the computer and the UHD-404VW must be on the same network segment.

For example, if the UHD-404VW is using 192.168.0.247, the computer should use an IP address in the same range, such as 192.168.0.xxx.

IMPORTANT — PC Tool Has Default Login Passwords

Before using the PC tool, a password is required.

Default PC tool passwords:

The Administrator account has full access.

The User account has limited access depending on the control software permissions.

Ports and Panel Layout

Step-by-Step Setup

1. Connect the included AC power cord to the UHD-404VW. 
2. Connect your HDMI source devices to HDMI Input 1, Input 2, Input 3, and Input 4. 
   Examples include a laptop, DVD player, Blu-ray player, TV box, streaming device, camera system, or media player. 
3. Connect HDMI Output 1, Output 2, Output 3, and Output 4 to your TVs, monitors, projectors, or video wall displays. 
4. If using external audio output, connect the analog audio outputs or Toslink outputs to your amplifier, audio system, or powered speakers. 
5. If using external analog audio insertion, connect the analog audio source to the matching Audio Input port. 
6. If using IR routing, connect IR receiver cables to the IR IN ports and IR blaster cables to the IR OUT ports. 
7. If using RS-232 control, connect the RS-232 port to a PC or control system using the 3-pin Phoenix connector. 
8. If using LAN, Web, or PC tool control, connect the LAN port to a PC, router, or network switch. 
9. Power on the HDMI sources, displays, audio system, and UHD-404VW. 
10. Use the front panel, PC tool, Web control, RS-232, or TCP/IP control to route inputs to outputs. 
11. For video wall setup, use the PC tool Video Wall page to set rows, columns, output assignment, screen stitching, input source, and bezel compensation. 

HDMI Cable Requirement — Critical

For best performance, use high-quality HDMI cables rated for HDMI 2.0 and 18Gbps bandwidth.

Poor-quality or long HDMI cables may cause:

• No video output 
• Flickering 
• Black screen 
• Signal dropouts 
• HDCP handshake issues 
• 4K@60Hz not working 
• Video wall alignment issues 
• Audio dropouts 
• Seamless switching problems 

For troubleshooting, test each source directly with each display, try shorter HDMI cables, and lower the output resolution temporarily.

Understanding Matrix Routing

The UHD-404VW allows any HDMI input to be routed to any HDMI output.

This means each display can show a different source, or multiple displays can show the same source.

Example:

Understanding Front-Panel Switching

To route a source from the front panel:

1. Press OUTPUT n. 
2. Press INPUT m. 
3. Press TAKE. 

Example:

To route Input 3 to Output 2:

1. Press OUTPUT 2. 
2. Press INPUT 3. 
3. Press TAKE. 

To route one input to all outputs:

1. Press ALL. 
2. Press INPUT m. 
3. Press TAKE. 

Understanding Presets

The UHD-404VW supports saved routing or video wall scenes.

Up to 8 scenes can be saved.

This is useful for installations that need different layouts, such as presentation mode, sports mode, meeting mode, or video wall mode.

Understanding Output Resolution Scaling

The UHD-404VW allows output resolution to be set from the front panel or PC tool.

Available output resolutions include:

To change resolution from the front panel:

1. Press RES. 
2. Press OUTPUT n. 
3. Press NEXT until the desired resolution appears. 
4. Press TAKE. 

EDID Management

The UHD-404VW supports EDID management.

Front-panel EDID options include:

To change EDID from the front panel:

1. Press EDID. 
2. Press INPUT m. 
3. Press NEXT to select the EDID option. 
4. Press TAKE. 

Manual EDID is loaded through the PC Tool.

Use 4K EDID modes for 4K displays.

Use 1080p or lower EDID modes for older displays or troubleshooting compatibility issues.

Understanding Video Wall Mode

The UHD-404VW supports video wall setup through the PC tool.

Basic video wall setup:

1. Open the PC tool. 
2. Connect to the UHD-404VW using UART / RS-232 or Network. 
3. Go to the Video Wall page. 
4. Set the number of rows and columns. 
5. Set how many outputs are available for the video wall. 
6. Select the screen area that should be part of the video wall. 
7. Right-click and choose Screen Stitching. 
8. Select the input source for the video wall. 
9. Set the output format if needed. 
10. Adjust bezel compensation if needed. 
11. Save the scene if you want to recall the layout later. 

The PC tool can also cancel stitching and return selected screens to normal output mode.

Understanding Bezel Compensation

Bezel compensation helps correct the image across display borders in a video wall.

The UHD-404VW supports two bezel adjustment methods:

Use bezel compensation when objects, lines, or text look broken or misaligned across the video wall.

Understanding Multiple Video Walls

The UHD-404VW can support more than one TV wall at the same time.

For example, the system can be configured as two separate 2x1 video walls.

Each wall can have its own bezel setting.

This is useful when the same installation needs multiple smaller display groups instead of one large 2x2 wall.

Understanding PIP With Video Wall

The UHD-404VW supports a type of PIP-style setup with video wall.

For example, in a 2x2 wall, one screen can be removed from the stitched wall and used to display another video source separately.

The manual explains that this separate screen becomes a full display screen, while the remaining screens continue the selected video wall layout.

This is useful when one display needs to show a different source while the rest of the wall remains grouped.

Understanding Audio Extraction and Audio Matrix

The UHD-404VW supports audio output through analog L/R and Toslink.

Audio output behavior:

Analog Audio OUT always outputs the same audio content as the matching HDMI output unless changed through audio matrix settings.

The 4 sets of audio output channels can also be independent of video and switched through PC Tool or commands.

Understanding Audio Input Selection

The Signal Setting page includes audio input options.

Use Auto for most HDMI sources.

Use External when you want to replace HDMI embedded audio with external analog L/R audio.

Understanding IR Matrix Routing

The UHD-404VW supports IR IN and IR OUT routing.

IR routing follows video routing automatically.

Example:

If HDMI Input 4 is routed to HDMI Output 2, then IR control from the Output 2 location can be sent to IR OUT 4.

This allows a user near the display connected to Output 2 to control the source device connected to Input 4.

The package includes:

• 4 IR receiver cables 
• 4 IR blaster cables 

Understanding PC Tool Control

The UHD-404VW includes PC tool control for setup and configuration.

The PC tool can connect using:

• UART / RS-232 
• Network 

Default PC tool settings:

The PC tool can be used to:

• Route inputs to outputs 
• Send one input to all outputs 
• Save and recall up to 8 scenes 
• Reset the system 
• Read, write, and save EDID 
• Select HDMI embedded audio or external L/R audio 
• Switch audio in Follow Video or Manual mode 
• Set output type 
• Set output format / resolution 
• Adjust brightness, contrast, saturation, and sharpness 
• Configure video wall layouts 
• Set bezel compensation 
• Save and load video wall scenes 
• Control CEC 
• Configure network settings 

Understanding Web Control

The UHD-404VW can also be controlled through a web browser.

Default Web login:

To use Web control:

1. Connect the LAN port of the UHD-404VW to the same network as the computer. 
2. Make sure the computer IP and matrix IP are in the same network segment. 
3. Enter the matrix IP address into a browser. 
4. Log in using the default admin credentials. 

The manual notes that Web control supports basic operation.

RS-232 and LAN Control

The UHD-404VW supports RS-232 and LAN control.

Default RS-232 / Ethernet control setting:

RS-232 and LAN control are useful for professional AV control systems, automation systems, classrooms, conference rooms, and control room installations.

CEC Control

The UHD-404VW supports CEC management.

CEC functions include:

• Power on 
• Power off 
• Volume up 
• Volume down 
• Mute / unmute 

If Auto Power On is enabled, the product will turn on all connected source devices and displays when the UHD-404VW is turned on.

CEC behavior depends on whether the connected source devices and displays support CEC and have CEC enabled.

FineTune / Picture Settings

The PC tool allows users to adjust picture settings for each output.

Available FineTune settings include:

• Brightness 
• Contrast 
• Saturation 
• Sharpness 

The manual recommends not changing the default settings unless there is a specific reason.

If the image looks incorrect after changing these settings, use Reset to return to factory settings.

What Source Devices Is the UHD-404VW Compatible With?

The OREI UHD-404VW can work with HDMI source devices such as:

• Laptops 
• Desktop PCs 
• DVD players 
• Blu-ray players 
• TV boxes 
• Cable boxes 
• Streaming devices 
• Media players 
• Camera systems 
• Presentation systems 
• Game consoles with HDMI output 

For 4K@60Hz output, the source device, HDMI cable, matrix, and display must all support HDMI 2.0 bandwidth.

What Displays Is the UHD-404VW Compatible With?

The UHD-404VW can connect to HDMI displays such as:

• 4K TVs 
• Monitors 
• Projectors 
• Commercial displays 
• Video wall panels 
• Retail displays 
• Control room displays 
• Classroom displays 
• Conference room displays 

For video wall use, displays should ideally be the same size and resolution for the cleanest result.

What Audio Devices Is the UHD-404VW Compatible With?

The UHD-404VW can send audio to:

• Amplifiers 
• Audio processors 
• Powered speakers 
• Balanced audio systems 
• Unbalanced analog audio systems 
• Toslink / SPDIF audio systems 
• HDMI TVs or AVRs through HDMI 

Audio behavior depends on whether the setup is using HDMI embedded audio, external analog audio insertion, Follow Video mode, or Manual audio switching.

Frequently Asked Questions

Q: What is the OREI UHD-404VW used for? 
A: The UHD-404VW is used to route up to four HDMI source devices to up to four HDMI displays. It also supports seamless switching, video wall layouts, audio extraction, audio insertion, IR matrix routing, RS-232 control, LAN control, Web control, and PC tool control.

Q: Is the UHD-404VW a matrix? 
A: Yes. It is a 4-input, 4-output HDMI matrix.

Q: Is the UHD-404VW a video wall processor? 
A: Yes. It supports video wall processing through the PC tool.

Q: Is the UHD-404VW just a splitter? 
A: No. It can send the same source to multiple displays, but it is more than a splitter because each output can independently select any input.

Q: Can each output show a different source? 
A: Yes. Each of the four outputs can show a different HDMI input.

Q: Can all displays show the same source? 
A: Yes. Use ALL + INPUT + TAKE from the front panel, or use the PC tool / Web control.

Q: Does the UHD-404VW support seamless switching? 
A: Yes. It supports seamless switching.

Q: Does the UHD-404VW support 4K@60Hz? 
A: Yes. It supports video resolutions up to 4K@60Hz 4:4:4.

Q: Does the UHD-404VW support 8K? 
A: No. The UHD-404VW supports up to 4K@60Hz. It does not support 8K.

Q: Does the UHD-404VW support 4K@120Hz? 
A: No. It supports up to 4K@60Hz.

Q: Does the UHD-404VW support HDCP 2.2? 
A: Yes. The manual lists HDCP 2.2 compliance.

Q: Does it support EDID management? 
A: Yes. EDID can be managed from the front panel or PC tool.

Q: What EDID options are available from the front panel? 
A: The front-panel EDID options include Manual, 3840x2160@60, 3840x2160@30, 1920x1200@60, 1920x1080@60, 1280x1024@60, 1280x720@60, and 1024x768@60.

Q: Does the UHD-404VW support output scaling? 
A: Yes. Output resolution can be set using the RES button or PC tool.

Q: Can I save routing presets? 
A: Yes. Up to 8 routing or video wall scenes can be saved and recalled.

Q: Can I save video wall layouts? 
A: Yes. Video wall scenes can be saved and loaded through the PC tool.

Q: Does the UHD-404VW support bezel compensation? 
A: Yes. Bezel compensation can be adjusted using pixel values or display dimension values.

Q: Does the UHD-404VW support multiple video walls? 
A: Yes. The manual notes that the product can support multiple TV walls at the same time, such as two 2x1 walls.

Q: Does the UHD-404VW support PIP with video wall? 
A: Yes. The PC tool can remove one screen from a stitched wall and show another video source on that screen separately.

Q: Does the UHD-404VW support IR routing? 
A: Yes. IR matrix routing is supported and follows the video routing.

Q: Does the UHD-404VW include IR cables? 
A: Yes. The package includes 4 IR receiver cables and 4 IR blaster cables.

Q: Does the UHD-404VW support audio extraction? 
A: Yes. It supports audio extraction through analog L/R and Toslink audio outputs.

Q: Does the UHD-404VW support audio insertion? 
A: Yes. External L/R audio insertion is supported through the analog audio input ports.

Q: What does “audio follow video” mean? 
A: It means the audio routing follows the HDMI video routing.

Q: Can audio be switched separately from video? 
A: Yes. In Manual audio mode, the PC tool allows separate switching of L/R and Toslink audio outputs.

Q: Can I use external analog audio instead of HDMI audio? 
A: Yes. Set the audio selection to External for the matching input.

Q: Can I control the UHD-404VW from a computer? 
A: Yes. You can control it through the PC tool using RS-232 or network connection.

Q: What is the default PC tool Administrator password? 
A: The default Administrator password is 111111.

Q: What is the default PC tool User password? 
A: The default User password is 000000.

Q: What is the default IP address? 
A: The factory default IP address is 192.168.0.247.

Q: What is the Web control login? 
A: The default Web control username is admin and the default password is admin.

Q: What RS-232 baud rate does the UHD-404VW use? 
A: The manual lists 9600 bps, 8 data bits, 1 stop bit, and no parity.

Q: What should I do if network control does not work? 
A: Make sure the computer and matrix are on the same network segment. For example, if the matrix is 192.168.0.247, the computer should be in the 192.168.0.xxx range.

Q: What should I do if the PC tool says “device response timeout”? 
A: Make sure the IP address of the PC and the UHD-404VW are in the same network segment.

Q: What should I do if the PC tool shows a TCP connection failed error? 
A: Check that the PC and matrix are on the same network segment. Also check whether the firewall is blocking the PC tool.

Q: What should I do if there is no video? 
A: Check that the correct input is routed to the output, confirm the HDMI cables are connected properly, check the source resolution, try another HDMI cable, and test the source directly with the display.

Q: Does the UHD-404VW need external power? 
A: Yes. Connect the included AC power cord.