What Is the HDS-404VW?
The OREI HDS-404VW is a 4K 4x4 seamless HDMI matrix and video wall processor. It allows up to four HDMI source devices to be routed to up to four HDMI displays.
The HDS-404VW can work in two main ways:
- Matrix mode, where each output can show the same or different HDMI source
- Video wall mode, where multiple displays can be combined into video wall layouts
The HDS-404VW supports HDMI 1.4b and HDCP 1.4, with a video bandwidth of 10.2Gbps. It supports video resolutions up to 4K@30Hz in matrix mode and 1080p@60Hz in video wall mode. It also supports seamless switching in matrix mode, 9 video wall configurations, bezel adjustment, 180° image rotation, RS-232 control, IR remote control, and front-panel control.
The HDS-404VW is useful for retail displays, restaurants, sports bars, classrooms, conference rooms, control rooms, showrooms, and other AV setups where multiple HDMI sources need to be routed or displayed across multiple screens.
IMPORTANT — HDS-404VW Is Both a Matrix and Video Wall Processor
The HDS-404VW has two main operating modes.
In matrix mode, it works as a 4-input, 4-output HDMI matrix. This allows any HDMI input to be routed to any HDMI output.
In video wall mode, it can combine selected displays into different video wall layouts.
This makes the product useful for both normal HDMI routing and basic video wall setups.
IMPORTANT — HDS-404VW Supports 4K@30Hz in Matrix Mode
The HDS-404VW supports video output resolutions up to 4K@30Hz in matrix mode.
It does not support 4K@60Hz, 4K@120Hz, or 8K.
For 4K@60Hz or higher resolution setups, use an HDMI 2.0 or HDMI 2.1 matrix/video wall processor.
IMPORTANT — Video Wall Mode Outputs 1080p@60Hz
In video wall mode, the displays that are selected for video wall splicing output a fixed resolution of 1080p@60Hz.
For example, in 1x2 mode, the first and second TVs output 1080p for the video wall group.
Other displays that are not part of the video wall group can use transparent transmission. For example, if the source is 4K@30Hz, the non-video-wall outputs can pass that signal through.
IMPORTANT — Video Wall Mode Is Not the Same as Extended Desktop
The HDS-404VW can create video wall layouts from HDMI source signals, but it is not a computer docking station or KVM switch.
It does not create a multi-monitor extended desktop from one computer by itself.
Use this product when you want to route HDMI sources or create a video wall layout across multiple displays.
If a computer needs true extended desktop operation, the computer or graphics card must provide the required display outputs.
IMPORTANT — Seamless Switching Is Supported in Matrix Mode
The HDS-404VW supports seamless switching in matrix mode.
This means switching between HDMI input sources in matrix mode is designed to happen faster and more smoothly than a basic HDMI switch.
This is useful in commercial displays, control rooms, live presentations, and display installations where quick switching is important.
IMPORTANT — Image Mirror / Rotation Works Only in Video Wall Mode
The manual notes that the output image mirror function is available only in video wall mode.
This feature can be used to rotate images, including 180° image rotation for specific outputs through RS-232 commands.
This is useful when the top displays in a 2x2 video wall are mounted upside down to reduce bezel gaps.
IMPORTANT — Bezel Adjustment Helps Align the Video Wall Image
The HDS-404VW supports horizontal and vertical bezel adjustment.
Bezel adjustment helps compensate for the physical borders between displays so the video wall image appears more natural across multiple screens.
Use bezel adjustment when lines, objects, or text appear misaligned across the edges of the displays.
Ports and Panel Layout
| Port / LED / Button | Location | Function |
| IR Window | Front panel | Receives IR signal from the included remote |
| Power LED | Front panel | Green when the product is working; red when in standby |
| Signal Source LEDs | Front panel | Shows which input is selected for Output 1–4 |
| Input Source Switching Buttons | Front panel | Cycles through connected inputs for each specific output |
| SERVICE Port | Front panel | USB-C firmware upgrade port |
| HDMI IN 1–4 | Rear panel | Connect HDMI source devices such as PC, DVD player, Blu-ray player, TV box, or media player |
| HDMI OUT 1–4 | Rear panel | Connect HDMI displays such as TVs, monitors, or projectors |
| RS-232 | Rear panel | Connect to a PC or control system for RS-232 command control |
| DC 12V | Rear panel | Connect the included power adapter |
Step-by-Step Setup
- Connect the included DC 12V power adapter to the HDS-404VW.
- Connect your HDMI source devices to HDMI IN 1, IN 2, IN 3, and IN 4.
Examples include a PC, DVD player, Blu-ray player, TV box, streaming device, camera system, or media player. - Connect HDMI OUT 1, OUT 2, OUT 3, and OUT 4 to your TVs, monitors, projectors, or video wall displays.
- Turn on the HDMI source devices, displays, and HDS-404VW.
- For matrix mode, use the front-panel buttons or remote control to route each input source to the desired output.
- For video wall mode, use the remote to select the desired video wall layout.
- Select the video wall group first, then select which HDMI input should appear on that video wall group.
- Use H-BEZEL and V-BEZEL on the remote to adjust horizontal and vertical bezel compensation if needed.
- If using RS-232 control, connect the RS-232 port to a PC or control system using the 3-pin Phoenix connector and RS-232 adapter.
HDMI Cable Requirement — Critical
For best performance, use high-quality HDMI cables.
The manual lists the following HDMI transmission distance guidance:
| Resolution | Recommended HDMI Cable Length |
| 4K@30Hz | 5m / 16ft |
| 1080p 4:4:4 | 10m / 33ft |
Poor-quality or long HDMI cables may cause:
- No video output
- Flickering
- Black screen
- Input not detected
- Output not detected
- Video wall alignment issues
- 4K@30Hz not displaying correctly
- Signal dropouts
For troubleshooting, test each source directly with each display and try shorter HDMI cables.
Understanding Matrix Mode
In matrix mode, the HDS-404VW can route any of the four HDMI inputs to any of the four HDMI outputs.
| Output | Available Input Options |
| Output 1 | Input 1, Input 2, Input 3, or Input 4 |
| Output 2 | Input 1, Input 2, Input 3, or Input 4 |
| Output 3 | Input 1, Input 2, Input 3, or Input 4 |
| Output 4 | Input 1, Input 2, Input 3, or Input 4 |
This means each display can show a different source, or multiple displays can show the same source.
Example:
| Output | Selected Source |
| Output 1 | Input 1 |
| Output 2 | Input 2 |
| Output 3 | Input 3 |
| Output 4 | Input 4 |
Understanding Video Wall Mode
The HDS-404VW supports 9 video wall configurations.
| Video Wall Mode | Description |
| 2x2 | Four displays form one 2-by-2 video wall |
| 2x1 | Two-display horizontal layout |
| 2x1-2 | Alternate two-display horizontal grouping |
| 1x2 | Two-display vertical layout |
| 1x2-2 | Alternate two-display vertical grouping |
| 3x1 | Three-display horizontal layout |
| 4x1 | Four-display horizontal layout |
| 1x3 | Three-display vertical layout |
| 1x4 | Four-display vertical layout |
| Matrix | Standard 4x4 matrix mode |
In video wall mode, the selected video wall group outputs 1080p.
Understanding Video Wall Source Selection
To select a source for a video wall group:
- Select the video wall mode.
- Press OUTPUT 1, 2, 3, or 4 to select the video wall group.
- Press INPUT 1, 2, 3, or 4 to select the HDMI source for that group.
This lets the user choose which HDMI source appears on the selected video wall group.
Understanding Bezel Adjustment
The HDS-404VW supports bezel adjustment using the remote or RS-232 commands.
| Bezel Control | Function |
| H-BEZEL | Adjusts horizontal bezel compensation |
| V-BEZEL | Adjusts vertical bezel compensation |
Bezel adjustment ranges from 0 to 10.
Use this when a video wall image does not line up correctly across display borders.
Understanding Image Mirror and 180° Rotation
The HDS-404VW supports mirror settings through RS-232 commands.
Mirror options include:
| Mirror Setting | Function |
| Mirror Off | Normal image |
| H Mirror On | Horizontal mirror |
| V Mirror On | Vertical mirror |
| H + V Mirror | 180° rotation |
This can be used to rotate selected outputs.
For example, if the top two TVs in a 2x2 video wall are mounted upside down to reduce bezel spacing, H + V mirror can rotate the image 180° for those displays.
Note: The manual states that output image mirror is available only in video wall mode.
Understanding Output Resolution
The HDS-404VW supports multiple output resolutions.
Available output resolutions include:
| No. | Output Resolution |
| 1 | 4096x2160p30Hz |
| 2 | 3840x2160p30Hz |
| 3 | 1920x1200p60Hz |
| 4 | 1920x1080p60Hz |
| 5 | 1920x1080p50Hz |
| 6 | 1600x1200p60Hz |
| 7 | 1600x900p60Hz |
| 8 | 1440x900p60Hz |
| 9 | 1360x768p60Hz |
| 10 | 1280x1024p60Hz |
| 11 | 1280x720p60Hz |
| 12 | 1280x720p50Hz |
| 13 | 1024x768p60Hz |
The RES button on the remote can change output resolution in matrix mode only.
EDID Settings
The HDS-404VW supports EDID control through RS-232 commands.
Available EDID options include:
| EDID Option | Setting |
| 1 | 4K2K30 4:4:4, Stereo Audio 2.0 |
| 2 | 4K2K30 4:4:4, Dolby/DTS 5.1 |
| 3 | 1080p, Stereo Audio 2.0 |
| 4 | 1080p, Dolby/DTS 5.1 |
| 5 | 1920x1200, Stereo Audio 2.0 |
| 6 | 1360x768, Stereo Audio 2.0 |
| 7 | 1024x768, Stereo Audio 2.0 |
| 8 | Copy from HDMI Output 1 |
| 9 | Copy from HDMI Output 2 |
| 10 | Copy from HDMI Output 3 |
| 11 | Copy from HDMI Output 4 |
Use 4K30 EDID modes for 4K@30Hz displays.
Use 1080p EDID modes for older displays or video wall setups.
Use Copy Output modes when you want the source device to follow the capability of a specific connected display.
Understanding the Remote Control
The included remote can control power, input routing, output selection, resolution, information display, video wall mode, and bezel adjustment.
| Remote Button | Function |
| Power | Powers on the matrix or sets it to standby |
| INFO | Displays the serial port baud rate on screen for about 5 seconds |
| INPUT 1 / 2 / 3 / 4 | Selects HDMI input source |
| OUTPUT 1 / 2 / 3 / 4 | Selects HDMI output channel |
| ALL | Selects all output channels at the same time |
| Left / Right Arrows | Selects previous or next HDMI input source |
| RES | Switches output resolution in matrix mode |
| Video Wall Mode Buttons | Selects the desired video wall layout |
| H-BEZEL / V-BEZEL | Adjusts horizontal or vertical bezel compensation |
To route a source in matrix mode, press the OUTPUT button first, then press the INPUT button.
Example: Press OUTPUT 2, then press INPUT 3 to send Input 3 to Output 2.
To send one input to all displays, press ALL, then press the desired INPUT button.
RS-232 Control
The HDS-404VW supports RS-232 command control through the 3-pin Phoenix connector.
Default RS-232 settings:
| Setting | Value |
| Baud Rate | 115200 |
| Data Bits | 8 |
| Stop Bits | 1 |
| Check Bit | 0 |
RS-232 commands can control:
- Power on/off
- Device status
- Beep on/off
- Front-panel lock
- Reboot
- Factory reset
- Input-to-output routing
- Output resolution
- Output color space
- Output mirror / rotation
- Output stream enable/disable
- EDID mode
- Video wall mode
- Horizontal bezel adjustment
- Vertical bezel adjustment
- Video wall group source selection
What Source Devices Is the HDS-404VW Compatible With?
The OREI HDS-404VW can work with HDMI source devices such as:
- PCs
- DVD players
- Blu-ray players
- TV boxes
- Streaming devices
- Cable boxes
- Satellite receivers
- Media players
- Camera systems
- Game consoles with supported HDMI output
For 4K@30Hz output, the source device, HDMI cable, matrix, and display must all support 4K@30Hz.
What Displays Is the HDS-404VW Compatible With?
The HDS-404VW can connect to HDMI displays such as:
- TVs
- Monitors
- Projectors
- Commercial displays
- Video wall panels
- Retail displays
- Control room displays
- Conference room displays
For video wall use, displays should ideally be the same size and resolution for the cleanest result.
Frequently Asked Questions
Q: What is the OREI HDS-404VW used for?
A: The HDS-404VW is used to route up to four HDMI sources to up to four HDMI displays. It can also create video wall layouts using multiple displays.
Q: Is the HDS-404VW a matrix?
A: Yes. It is a 4-input, 4-output HDMI matrix.
Q: Is the HDS-404VW a video wall processor?
A: Yes. It supports 9 video wall configurations.
Q: Is the HDS-404VW a splitter?
A: It can send the same source to multiple displays, but it is more than a splitter because each output can select a different HDMI input in matrix mode.
Q: Can each output show a different source?
A: Yes. In matrix mode, each output can show a different HDMI input source.
Q: Can all four displays show the same source?
A: Yes. Use the ALL button on the remote, then select the desired input source.
Q: Does the HDS-404VW support seamless switching?
A: Yes. It supports seamless switching in matrix mode.
Q: Does the HDS-404VW support 4K@60Hz?
A: No. The HDS-404VW supports up to 4K@30Hz in matrix mode.
Q: Does the HDS-404VW support 8K?
A: No. It does not support 8K.
Q: Does the HDS-404VW support 4K@120Hz?
A: No. It does not support 4K@120Hz.
Q: What resolution does video wall mode output?
A: Displays selected for video wall splicing output a fixed 1080p resolution.
Q: Can non-video-wall outputs still pass 4K@30Hz?
A: Yes. The manual notes that displays not included in the video wall group can use transparent transmission, such as passing a 4K@30Hz source.
Q: Does the HDS-404VW support 2x2 video wall mode?
A: Yes. It supports 2x2 video wall mode.
Q: What video wall modes are supported?
A: Supported layouts include 2x2, 2x1, 2x1-2, 1x2, 1x2-2, 3x1, 4x1, 1x3, and 1x4.
Q: Does it support bezel adjustment?
A: Yes. Horizontal and vertical bezel adjustment is supported.
Q: What is bezel adjustment used for?
A: Bezel adjustment compensates for the physical border between displays so the image appears more aligned across a video wall.
Q: Can I flip or rotate the image on the top TVs in a 2x2 video wall?
A: Yes. Use RS-232 mirror commands to enable H + V mirror for the selected outputs, which creates a 180° rotation.
Q: Does image mirror work in matrix mode?
A: No. The manual notes that output image mirror is available only in video wall mode.
Q: Does the HDS-404VW have audio extraction?
A: No. This model does not include separate Optical, RCA, 3.5mm, or HDMI Audio Only audio extraction outputs.
Q: What HDMI audio formats are supported?
A: The manual lists LPCM 2.0/5.1, Dolby 2.0/5.1, Dolby Digital Plus, and DTS 2.0/5.1.
Q: Does the HDS-404VW support EDID control?
A: Yes. EDID can be controlled through RS-232 commands.
Q: What is the SERVICE port used for?
A: The USB-C SERVICE port is used for firmware upgrades.
Q: Does the HDS-404VW support RS-232 control?
A: Yes. It supports RS-232 command control through the 3-pin Phoenix connector.
Q: What is the default RS-232 baud rate?
A: The default baud rate is 115200.
Q: How do I switch sources from the front panel?
A: Press the input source switching button for the specific output to cycle through connected inputs.
Q: How do I switch sources using the remote?
A: Press the desired OUTPUT button first, then press the desired INPUT button.
Q: How do I send one input to all outputs?
A: Press ALL on the remote, then press the desired INPUT button.
Q: What HDMI cable length is recommended?
A: The manual lists 5m / 16ft for 4K@30Hz and 10m / 33ft for 1080p 4:4:4.
Q: What should I do if there is no video output?
A: Check that the correct input is selected, confirm HDMI cables are connected properly, test the source directly with the display, try a shorter HDMI cable, and check the output resolution.
Q: Does the HDS-404VW need external power?
A: Yes. Connect the included DC 12V/1A power adapter.
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