Each method requires a specific combination of pins. – The reason behind this stupid expensive solution: It seems that the lightning connector is similar to the thunderbolt connector idea.
#Does a thunderbolt to hdmi adapter increase latency update#
The reason behind it? Apple can update the adapter with a new OS easily, thus enabling higher resolutions and introducing more features later, without the need to introduce a new adapter. – It’s very likely that the connector downloads its firmware from the iOS device each time it gets connected. PS: If you’re wondering why we’re obsessed with clean iOS video out, we’ll post some status on that soon! Very interesting! Thanks, whoever you are. UPDATE 3/2: This anonymous comment - if you believe it - confirms nearly all of our theories and adds much-needed backstory. The good news? If someone complains that this insignificant plug costs $50, tell them it’s a tiny computer! The bad news? By streaming internally, the quality is poor, and it’s not 1080p. Or maybe they want get as much functionality out of the iPad as possible to reduce cost and complexity. Why do this crazy thing at all? All we can figure is that the small number of Lightning pins prevented them from doing raw HDMI period, and the elegance of the adapter trumped the need for traditional video out, so someone had to think seriously out of the box. What OS does it boot? thinks the adapter copies over a “mini iOS” (!) from the device and boots it in a few seconds every time it’s connected, which would explain the fairly lengthy startup time for video out. There’s a lot more going on in this adapter than we expected: indeed, we think the Lightning Digital AV Adapter outputs video by using AirPlay (or similar MPEG streaming). Are we off base? Let us know! So, AirPlay (or AirPlay-like MPEG streaming) makes a lot more sense now. In short: it appears the Lightning Digital AV Adapter has a SoC CPU. And the H9TKNNN2GD part number on there points towards RAM - 2Gb worth. Your eyes don’t deceive you - that tiny chip says ARM. What could all of those resistors be for? Smaller than anything we’ve seen, electronics-wise. You would not believe how incredibly tiny those components are on the left. It seems unlikely, doesn’t it? So out came the hacksaw. “You mean to tell me there’s enough electronics in that tiny plug to support AirPlay streaming and decoding?” It’s in no way passing raw HDMI out from the device, but rather presenting said stream upscaled to 1080p. It must somehow set up a connection with the very iOS device it’s plugged into. I don’t mean AirPlay the network protocol, but rather AirPlay the video compression system. Is the Lightning Digital AV Adapter basically a small AirPlay-like receiver? You got it. After some good Twitter leads, and a little digging, we had our theory: Hang on, these are the same things we experience when we stream video from an iOS device to an Apple TV… This is just an AV adapter! Why are these things happening! Limited resolution. (We don’t get these artifacts with the old AV adapter.) Theory Not exactly the cleanest text in the universe! Look at all that edge garbage. Right?īut not with the Lightning Digital AV Adapter: When you plug a device into a television, you expect a clean, crisp signal - a mirror of what you see on the screen. Maybe they mean that the adapter upscales the 1600 × 900 image to 1080p? Mystery #2: MPEG Artifacts Questionably, Apple’s iPad mini tech specs claim “up to 1080p” video out support, but we can’t figure out how that’s possible. When we plug in the old Dock Connector AV Adapter, the system gives us the 1920 x 1080: “Hang on, that’s not 1080p!”, you’re saying to yourself. When we turn on “Video Mirroring” to send out an image through the Lightning AV Adapter, the system tells us that the maximum and optimum resolution we can do is 1600 × 900: (Chung-chung!) Mystery #1: 1600 × 900 Resolution, Tops In doing so, we waded right in the middle of a strange video out mystery. We’ve been doing significant testing lately with video out using various iOS devices for an upcoming project.
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