LED Processor
An LED processor is the video processing device that receives input signals (HDMI, SDI, DisplayPort), scales content to the exact pixel dimensions of the LED wall, and outputs data to panels via sending cards. Processors handle critical functions including scaling, color correction, PIP layouts, and source switching.
The Role of LED Processors
LED processors serve as the central hub between video sources and LED display panels. They accept standard video signals and convert them into the specialized data streams that LED receiving cards require.
Core Processor Functions
Input Handling: Processors accept signals from cameras, computers, media servers, and switchers via HDMI, SDI, DVI, or DisplayPort connections. Higher-end units support multiple simultaneous inputs for picture-in-picture or backup source switching.
Scaling: Unlike fixed-resolution monitors, LED walls come in arbitrary pixel dimensions. The processor scales source content to precisely match the LED wall resolution, whether that is 1920x1080, 3840x2160, or custom dimensions like 2688x768.
Color Processing: Processors apply gamma curves, color temperature adjustments, and brightness mapping to optimize content appearance on LED panels. Some offer advanced color management for broadcast color accuracy.
Canvas Mapping: For complex LED configurations (curved walls, floor displays, irregular shapes), processors map rectangular video content onto the actual panel arrangement.
Processor Capacity Ratings
Manufacturers rate processors by maximum pixel capacity, typically ranging from 2 million to 16+ million pixels. This capacity limits the total resolution you can drive from one processor. For example, a 4K (3840x2160) display requires approximately 8.3 million pixels.
Output Architecture
Processors connect to LED panels through sending cards and data cables. Each output port has a maximum pixel and panel count. A processor with 16 outputs at 650,000 pixels each provides 10.4 million total pixels, but no single run can exceed port limits.
Redundancy and Backup
Professional installations often use redundant processor configurations with automatic failover. Hot-backup processors monitor the primary unit and take over instantly if problems occur, preventing blank screens during live events.
Integration with Control Systems
Modern processors offer network control, allowing integration with show control systems, lighting consoles, and media servers. This enables automated source switching, preset recall, and real-time adjustment during productions.
Frequently Asked Questions
How do I choose the right LED processor?
Calculate your total pixel count (horizontal x vertical resolution) and verify the processor supports that capacity. Check output port count and pixels-per-port limits. For broadcast, confirm it supports genlock input and your required frame rates. Popular brands include Brompton, Novastar, Colorlight, and ROE.
Can one processor drive multiple LED walls?
Yes, most processors can divide their output across multiple displays as long as the total pixel count stays within capacity. Some processors support independent content on each output, while others mirror or extend a single canvas.
What is the difference between a processor and a sending card?
The processor handles video input, scaling, and processing. The sending card converts processed video into the data format that LED receiving cards understand. Many processors include integrated sending cards, but they can also be separate devices.
Related Terms
Data Cable
ProcessingData cables carry the video signal from LED processors to display panels, using either copper Ethern...
Resolution
BasicsResolution describes the total number of pixels in an LED display, expressed as width times height (...
Refresh Rate
PerformanceRefresh rate measures how many times per second an LED display updates its image, expressed in Hertz...
Apply This Knowledge
Use our LED video wall calculator to see how led processor affects your project specifications.
Try the Calculator