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Re: [sensors] Javascript 120Hz devicemotion events for high end inertial applications

From: Tobie Langel via GitHub <sysbot+gh@w3.org>
Date: Mon, 20 Feb 2017 13:48:33 +0000
To: public-device-apis-log@w3.org
Message-ID: <issue_comment.created-281083570-1487598512-sysbot+gh@w3.org>
>From the feedback gathered so far here, it seems a _reporting 
frequency_ whose max is tied to the animation frame rate is 

On the other hand, a faster _polling frequency_ seems necessary to 

1. gather more data points (indoor navigation use case), or
2. decrease latency (VR use case).

There are privacy concerns with sampling > 60 Hz, though my 
understanding is research by @maryammjd seems to indicate this is an 
issue at much lower frequency rates already. (@maryammjd can you 
please confirm, plus point to relevant papers?)

When _polling frequency_ is higher than _reporting frequency_ and we 
don't want to loose samples (so not the VR case), we need to buffer 
samples. This needs discussion as to how best to achieve this. BYOB? 
Dedicated API? Etc.

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Received on Monday, 20 February 2017 13:48:41 UTC

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