Is this appropriate for creating a wireless HDMI interface for VR headsets?
Datasheet says it add 5ms latency, latency in VR causes nausea.
5ms isn't yet at nausea levels though...
A 60 GHz phased array for $10
11–20 of 111 posts
Re: A 60 GHz phased array for $10
#12I wonder what sorts of things the chips were used for inside laptops and smart TVs. He mentions it being used for streaming, but it's a directional radar chip, seems it would be used for doing a 3d scan of an area?
Re: A 60 GHz phased array for $10
#13Earlier quoted context omitted.
Datasheet says it add 5ms latency, latency in VR causes nausea.
I'm not up to date on VR tech - is the video memory on board the VR headset? If the memory is onboard, you could do some simple rotations and translations on the current frame while the render pipeline caught up.
There's an overview of some of the various techniques that Oculus uses here: https://uploadvr.com/reprojection-explained/
Re: A 60 GHz phased array for $10
#14I wonder what sorts of things the chips were used for inside laptops and smart TVs. He mentions it being used for streaming, but it's a directional radar chip, seems it would be used for doing a 3d scan of an area?
It's a directional transceiver. Directional transceivers happen to be usable as radar, but these were not intended for that usecase: https://en.wikipedia.org/wiki/WirelessHD
Re: A 60 GHz phased array for $10
#15>Now the bad news: SiBeam was bought by Lattice Semiconductor, and right before I gave this talk, Lattice shut down the entire SiBeam organization and ended support and production of this part. I didn’t find out about this until months later, when I contacted the sales engineers I had been talking to about this part and they told me what happened.
This is one thing that really pisses me off. Time and time again you've got small(ish) companies doing interesting stuff, succeeding and then they step on a landline. They do something that gets them in the cross hairs of a big company and suddenly BOOM big company buys small company for ridiculous money and then inexplicably shuts down 90% of what the small company was doing. The sale happens for a nice premium and yet the second the sale is closed 90% of the things that the company did that made it valuable are jettisoned. How can it be that these companies can afford to buy companies at a premium, throw away massive parts of the value of the company and yet: this obvious value destruction seems to be standard operating procedure for large companies.
Re: A 60 GHz phased array for $10
#16Earlier quoted context omitted.
I'm not up to date on VR tech - is the video memory on board the VR headset? If the memory is onboard, you could do some simple rotations and translations on the current frame while the render pipeline caught up.
There's an overview of some of the various techniques that Oculus uses here: https://uploadvr.com/reprojection-explained/
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Re: A 60 GHz phased array for $10
#17Earlier quoted context omitted.
Datasheet says it add 5ms latency, latency in VR causes nausea.
5ms isn't yet at nausea levels though...
In 2014, Michael Abrash gave a talk summarizing what's needed for a feeling of presence in VR. He said 20 ms motion-to-photon latency is required for the virtual world to feel like it's "nailed in place". So 5 ms is 25% of the latency budget.
Re: A 60 GHz phased array for $10
#18Phased arrays are very cool tech. Personally, I can't wait for visible-wavelength optical phased arrays to hit the mainstream (they're just now being implemented), since they'd enable tech like legitimately holographic displays and video cameras with digitally programmable optical zoom.
Re: A 60 GHz phased array for $10
#19>Now the bad news: SiBeam was bought by Lattice Semiconductor, and right before I gave this talk, Lattice shut down the entire SiBeam organization and ended support and production of this part. I didn’t find out about this until months later, when I contacted the sales engineers I had been talking to about this part and they told me what happened. This is one thing that really pisses me off. Time and time again you'v…
Some companies are purchased only so they won't become major competitors.
Re: A 60 GHz phased array for $10
#20>Now the bad news: SiBeam was bought by Lattice Semiconductor, and right before I gave this talk, Lattice shut down the entire SiBeam organization and ended support and production of this part. I didn’t find out about this until months later, when I contacted the sales engineers I had been talking to about this part and they told me what happened. This is one thing that really pisses me off. Time and time again you'v…
Probably because the technology didn't make it as a standard but they wanted the expertise.