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The problem is that when I connect the Moshi adapter to my MacBook Pro and attempt to wake my computer by tapping a key on my Apple Wireless Keyboard, nothing happens. To connect the HDMI Cable to my MacBook Pro I am using the Moshi MiniDisplay Port to HDMI Adapter, which I also bought at. They are quality cables at a cheap price. The HDMI Cables that I have been using for home audio and my computer are the MediaBridge cables that carries. I have several HDMI cables ranging in quality. I use the external monitor as my only monitor. On my desk, I have my laptop on a Twelve South Bookarc stand and I keep it closed. To be honest, I didn’t bother trying the VGA connection to test differences in quality. I was not about to connect my MBP through a VGA connection and loose valuable quality so I opted to connect through HDMI.
My monitor is a 27″ Samsung S27A350H which offers an HDMI and VGA input. However, in making this change to HDMI I encountered a few problems. The extra features an Apple Cinema Display offer are nice, but I can live without them. My eye (even with glasses on) can’t tell much of a difference between an Apple Cinema Display and a Samsung. Samsung Monitors are very high quality and a fraction of the price. I have used Samsung Monitors for a few years now since selling my 30″ Apple Cinema Display before they were discontinued. While it’s good to know that future updates will make the output video quality better, the lack of raw HDMI is still disappointing.I recently started using my Samsung Monitor through an HDMI connection rather than DVI. When this will happen I can’t say for anonymous reasons, but these concerns haven’t gone unnoticed. Given the dynamic nature of the system (and the fact that the firmware is stored in RAM rather then ROM), updates **will** be made available as a part of future iOS updates. For the time being, the quality was deemed to be suitably acceptable. The commenter adds:Ĭertain people are aware that the quality could be better and others are working on it. The downside to all this flexibility is that the output video is of a degraded quality and in some cases even laggy.
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Support for that adapter can then simply be added to iOS device via a software update, not requiring any hardware changes. The encoded data is transferred as packetized data across the Lightning bus, where it is decoded by the ARM SoC and pushed out over HDMI.īy shifting the complexity involved in the puzzle onto the adapter end, Lightning becomes really flexible and future proof, in that the system could output to any device as long as there’s a compatible adapter at the other end. Airplay itself (the network protocol) is NOT involved in this process.
Airplay uses a bunch of hardware h264 encoding technology that we’ve already got access to, so what happens here is that we use the same hardware to encode an output stream on the fly and fire it down the Lightning cable straight into the ARM SoC the guys at Panic discovered.
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Again, it’s just a high speed serial interface. Lightning doesn’t have anything to do with HDMI at all.
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We did this to specifically shift the complexity of the “adapter” bit into the adapter itself, leaving the host hardware free of any concerns in regards to what was hanging off the other end of the Lightning cable. Contrary to the opinions presented in this thread, we didn’t do this to screw the customer. There is no clever wire multiplexing involved. Lightning is simply not capable of streaming a “raw” HDMI signal across the cable.
He further goes on to explain why the Lightning adapter can’t stream raw HDMI: There’s a set of kernel modules that handle the low level data transfer and HDMI output, but that’s about it. It boots straight into a daemon designed to accept incoming data from the host device, decode that data stream, and output it through the A/V connectors. The OS on the adapter is so barebones that there are no Unix tools, no launchd for process management: He notes that there’s no AirPlay involved in the entire flow of outputting video, and that the adapter runs a barebones OS, whose only similarity with iOS is the XNU kernel. Today, an anonymous commenter, possibly an Apple engineer, clarified a lot of information about the adapter over at Panic Software’s blog. While it was clear that there was some video decoding being done by the ARM SoC, we didn’t really know the specifics and the exact reason why the adapter wasn’t outputting raw HDMI. Yesterday, we’d told you about the tiny ARM based computer embedded inside every $50 Lightning Digital AV Adapter.
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