Dual-mode, medium-sized Huidu controller, with an HDMI input as well.
Huidu · dual-mode (synchronous/asynchronous) LED media player
Huidu HD-A4L asynchronous LED controller
The HD-A4L belongs to Huidu's dual-mode (synchronous and asynchronous) multimedia player family, with a load capacity of 655,360 pixels, 16 GB of memory, gigabit LAN and 5/2.4 GHz Wi-Fi. It has one HDMI input, suitable in synchronous mode for taking a live video signal, while in asynchronous mode it downloads and plays content from its built-in memory.
That duality makes it practical on installations where the same display sometimes has to carry a live event feed (a sports event or a conference, say) and sometimes standalone advertising or information playback. The HD-A4L offers a greater video window capacity than the HD-A3L (1×4K or 2×1080P simultaneously, for instance).
Where the HD-A4L sits in an LED wall system
A device with two roles: in asynchronous mode the 16 GB of internal storage is the source, in synchronous mode the HDMI input. In both cases the signal goes to the receiving cards (typically HD-R512T) over two gigabit LED outputs on Cat5e/Cat6, and on to the modules over HUB75E. The 655,360 pixel load capacity is roughly one port's worth; the second port makes distribution and cable length management easier. Content management is HDPlayer (PC and mobile), the wall's physical layout is HDSet, and cloud remote supervision is XiaoHui Cloud. Gigabit LAN, 2.4 GHz Wi-Fi and an optional 4G/5G module can be chosen as the upload route.
WHEN IT IS THE RIGHT CHOICE
On displays where it cannot be decided in advance whether live (synchronous) or standalone (asynchronous) playback will be needed, and the flexibility of a single device matters.
WHAT TO WATCH OUT FOR
Because of the dual-mode function, the operating mode has to be set unambiguously at commissioning; mixing the two can lead to a faulty display.
The HD-A4L in practice
Commissioning starts with the AP-mode Wi-Fi connection, a password change, the time zone and the brightness profile, but most of the on-site errors come from dual mode: the operating mode has to be selected unambiguously in HDPlayer, because on a device set to synchronous mode the uploaded programme will not start, while in asynchronous mode the HDMI source stays black. The gigabit LAN is a noticeable step forward from the HD-A3L when uploading large videos. For a live event feed it is worth testing the source resolution in advance: the HDMI signal is scaled automatically in synchronous mode, whereas asynchronous content has to be rendered to the wall's exact pixel dimensions. An internet outage does not affect the asynchronous branch and the downloaded programme carries on; the synchronous branch, however, goes black the moment the source is lost. On replacement the programme and the network settings are lost, while the receiving cards' configuration remains.
Alternatives to the HD-A4L
If there will never be a live source, the HD-A3L is cheaper, provided you can live with the 100 Mbps LAN. For a larger wall and more simultaneous video windows, the HD-A6L (4 LED ports); for a high-resolution advertising board, the HD-A7. In other ecosystems the NovaStar Taurus TB50 is its direct dual-mode counterpart. If the live signal is the main event — a camera, switching between several sources, an event — then what is needed is not a dual-mode player but a video processor (HD-VP2430, NovaStar VX600) and a dedicated media source, because the HDMI input here is single-source.
HD-A4L manual and datasheet
The documents live on the manufacturer's own site and open in a new window — so you always get the latest version. We do not copy or translate their contents.
HD-A4L on video
The player is only embedded on click — until then not a single request goes to YouTube.
#P2.5 LED project from Hungary bro Done with #Huidu #A4L and receivers #R712 #huidutechnology
Murphy Ye · YouTube · Demo
How To Setup Huidu Dual-mode Player A6/A5/A4 to Play Dual Modes At the Same Time
Huidu Controller · YouTube · Tutorial
Related asynchronous controllers
asynchronous LED controller — but what does it go into?
On its own the Huidu HD-A4L is a component. With us it works inside these displays — design, manufacturing and installation included.
