LED Video Splicer: How One Processor Drives a Giant Canvas
An LED video splicer is the chassis that makes a 100-million-pixel wall behave like a single display. Where a 2-in-1 processor tops out at 26M pixels, a splicer keeps adding input and output cards until the canvas is as big as the job. Most “splicer” searches land on vendor product pages – which is why nobody explains how they actually work. This guide does: what a splicer does differently from a video processor, how input/output cards build one canvas, how to size one, and an even comparison of the NovaStar H2, Colorlight V6 and Mooncell V-Series using publicly published figures.
What Is an LED Video Splicer? The Quick Answer
An LED video splicer is a chassis-based processor whose cards can be combined into one virtual canvas. The chassis takes input cards (DVI, HDMI 1.3/1.4/2.0, DP1.2, VGA, SDI per the V-Series specification), an output stage that sends Gigabit Ethernet to receiving cards, and a synchronizing engine that stitches everything into a single upscaled/simultaneously-measured image while allowing layering, roaming and scaling between windows.
The result: 40 to 200 output ports under one sync domain. Mooncell’s V-Series splicer scales from a 3U/40-port/26M-pixel chassis to a 14U/200-port/130M-pixel chassis with the same output-card architecture – the one specification line that predicts the whole machine.
Splicer vs Standard Video Processor: Where the Line Sits
Think of the three tier picks in a control chain, honestly:
- Standard / 2-in-1 processor: good scaling and windowing for one wall at a fixed cap (26M pixels for the M40-class).
- Video splicer: the same processing plus modular growth – an infinite-ish canvas bounded only by card slots, and input channels measured in double digits (the V-Series 3U allows 36×2K channels, 24×4K@30Hz, 6×4K@60Hz; the 14U allows 160×2K and 40×4K@60Hz).
- Sending controller: transmit-only; no processing at all.
The practical question is what your wall actually is. Gigantic single-surface, multi-angle walls, conference/control museums, broadcast walls – splicer territory. Fixed single-wall 26MP-down work – 2-in-1 territory. The 2-in-1 comparison covers the lower tier; the LED video processor guide covers the whole chain.
How Splicing Works: Input Cards, Output Cards and One Canvas
Three stages build the picture:
- Input stage. Each input card digitizes and embeds a source. The V-Series accepts DVI, HDMI 1.3/1.4/2.0, DP1.2, VGA, SDI, with HDMI audio capture – and each chassis size comes with its own channel budget (36-160 2K-class channels depending on frame).
- Processing/splicing stage. All window layers, roaming and scaling happen on the unified 4:4:4 processing plane. The headline features of the V-Series at this stage: arbitrary layering, multi-screen free roaming and scaling, frame synchronization, and – its strongest differentiator – irregular and intelligent irregular display splicing.
- Output stage. Output cards drive Gigabit loops (each V-Series output card carries 10 network ports, and the chassis spec lists single-port width/height limits at 65,536 pixels). Everything runs to receiving cards in the cabinets, in mapping order defined in the software.
Wiring is the same physical work as a 26M 2-in-1 – more ports, not different principles. What changes is management: scenes, zones and the framing.
How to Choose a Splicer by Screen Size
Size the chassis opposite to your wall’s max load. The table maps Mooncell’s published chassis levels with the input-channel budget that comes with each frame.
| Canvas size | Chassis | Outputs / max load | Input budget |
|---|---|---|---|
| Up to 26M px | 3U | 40 ports / 26M px | 36×2K, 24×4K@30Hz, 6×4K@60Hz |
| 26-39M px | 5U | 60 ports / 39M px | 48×2K, 24×4K@30Hz, 12×4K@60Hz |
| 39-65M px | 7U | 100 ports / 65M px | 80×2K, 40×4K@30Hz, 20×4K@60Hz |
| 65-130M px | 14U | 200 ports / 130M px | 160×2K, 80×4K@30Hz, 40×4K@60Hz |
The pattern that most buyers miss: chassis doesn’t only buy output, it buys inputs. A 3U frame and a 14U frame differ in port counts (40 vs 200) and in how many simultaneous sources they can swallow (36 vs 160 channel budgets). A control room with 20 camera sources is an input budget, not an output problem.
NovaStar H2 vs Colorlight V6 vs Mooncell V-Series: An Even Comparison
Vendors write their own marketing; the table below uses publicly published specifications only, and every figure should be re-checked against the vendor’s current data sheet before a quote – especially with two of the three brands’ numbers drifting across releases.
| Model | Chassis type | Max total load (published) | Input routing | Positions up to |
|---|---|---|---|---|
| NovaStar H2 | 2U splicer | 26M px (4K sending card config; older docs list 20.8M) | 4 cards / 16 channels max, up to 4096×2160@60Hz, HDCP/HDR10/HLG | 32 layers |
| Colorlight V6 | Hybrid chassis splicer | 100M px when expanded to 72 channels; per-port up to 2.3M px | HDMI/DP/DVI/VGA/SDI/CVBS/HDBaseT inputs on cards | 128 saved scenes, 4 independent screens |
| Mooncell V-Series | 3U-14U chassis line | 26M-130M px by frame | 36-160×2K channels, up to 40×4K@60Hz | 4:4:4 processing, irregular splicing, frame sync |
Reads honestly: NovaStar’s H2 2U compactness and 32-layer depth with broadcast-tuned input (HDR10/HLG) – the standard for venues that demand it. Colorlight’s V6 leads in expansion headroom (to 100M-pixel configurations) and front-panel touch control. Mooncell’s V-Series grades in chassis steps and publishes its input budgets per frame – the strongest fit where irregular-shape work spans the wall. Cost bands vary by card configuration; the chassis itself is a small part of a final quote.
Installation and Onsite Setup: What Changes at the Wall
Three departures from a single-processor install:
- Card slot plan. Leave spare slots for future sources (GPU wall, camera mux, extra DP) in the decision – retrofitting a 3U with a 4K60 input card after the rack mount is standard quoted, not listed as a live swap on older frameworks; verify hot-swap against your vendor’s config.
- Loop mapping. Each output card’s ports must be mapped to rows in the software in physical order. For irregular screens, mapping is the job – the V-Series explicitly supports irregular and intelligent irregular splicing, and the mapping tooling handles the layout rather than a manual ladder.
- 10G vs 1G loops. If the venue drives fiber fiber runs (stadium, campus), confirm the output card’s options with the vendor before quoting fiber-only line runs.
For the control link that sits upstream in these systems, the LED cloud control system guide covers multi-wall remote management for the same rooms this class of splicer serves.
FAQ: LED Video Splicer Questions
What is an LED video splicer?
A chassis-based video processor that combines input and output card modules to drive very large LED walls as one canvas. The chassis grade (U size) determines maximum ports and load; the same engine powers both small and giant walls.
What is the difference between a video processor and a video splicer?
Layered mostly by scale and modularity. A processor usually covers one wall up to its load cap (the M40 tops at 26M); a splicer chassis adds cards, so a 130M wall and a 7M wall can share the same architecture. Splicers additionally allow larger input budgets and full layers for multi-signal use cases.
How many pixels can a splicer drive?
Varies by chassis configuration: Mooncell’s V-Series levels go from 26M pixels (3U, 40 ports) to 130M (14U, 200 ports); NovaStar’s H2 publishes 26M with a 4K sending card; Colorlight’s V6 expands to 100M with 72 channels. Confirm with the current vendor data sheet.
What is an output card in a video splicer?
A modular board that converts the processed picture to Ethernet output for receiving cards. In the V-Series each output card carries 10 network ports, and each port’s width/height max is 65,536 pixels per specification.
Can a splicer drive an irregular-shaped LED screen?
Yes – this is where the class stands out. The Mooncell V-Series lists irregular and intelligent irregular display splicing plus frame synchronization, which matters for curved walls and multi-corner displays. Confirm the mapping tool covers your exact layout shape.
What signals can I feed into a splicer?
Typically DVI, HDMI (1.3/1.4/2.0), DP1.2, VGA and SDI, plus audio channels. A 3U V-Series chassis handles 36×2K or 24×4K@30Hz sources (6×4K@60Hz), with bigger frames carrying bigger budgets.
How many scenes can a splicer save?
Depends on vendor architecture – Colorlight’s V6 shows 128 scene saves with the front-panel touch interface; Mooncell’s V-Series manages layer-based layouts from the software surface. Scene management is a convenience, not a capacity spec; count your planned presets first, then compare.
Is a splicer necessary for a single large screen?
If the wall fits inside the processor’s published load and needs no multi-source compositing, no – the simpler box is better value. Splicers earn their price when either the canvas or input budget outgrows the single unit.
How much does an LED video splicer cost?
The chassis is the cheap part; the cards, output cards and power form the price – reseller listings for entry splicer-class hardware sit in the low hundreds to four figures per section, before cards. A correct quote needs your canvas and source count, so treat any number without them as illustrative.
What brand of video splicer is best?
Nobody. Each vendor’s strong line: NovaStar broadcasts tuning (H2 in 2U, 32 layers, HDR10/HLG); Colorlight expansion-per-channel value (V6 to 100M); Mooncell publishes full input budgets and irregular-shape support per chassis frame. Match against your wall and sources, not against the logo.
Bottom Line: One Engine, Four Chassis Sizes
Pick the chassis by total canvas load, then verify the input budget against your source list: 26M → 3U, 39M → 5U, 65M → 7U, 130M → 14U (Mooncell V-Series), or evaluate the H2/V6 line against those same numbers. Send your source count and canvas – we’ll map the chassis and card config for you before any quote.
One level down: the V-Series product page and the Mooncell product line guide complete the stack.
Specification sources: Mooncell V-Series Specification V4.1 via www.mooncell.com.cn (3U 26M/40 ports, 5U 39M/60 ports, 7U 65M/100 ports, 14U 130M/200 ports; input budgets 36-160 channels 2K class; DVI/HDMI1.3-2.0/DP1.2/VGA/SDI; irregular splicing, frame sync, 4:4:4; single output card 10 network ports; per-port width/height 65,536). NovaStar figures per current public H2 documentation and novastar.shop (26M px with 4K sending card; older docs list 20.8M; 4 input cards/16 channels; 8K×4K@30Hz input card tier; HDCP/HDR10/HLG; 32 layers; 2U, 210W). Colorlight figures per public V6/VX6 descriptions and reseller documentation (system 100M px expanded to 72 channels; per-port up to 2.3M px; 128 scenes; touch panel; front-panel control). All are manufacturer-published or vendor-listed maxima under stated conditions; verify against the current vendor data sheet and project requirements before quoting. Cost bands are illustrative; prices vary by configuration.
