W3C home > Mailing lists > Public > public-device-apis-log@w3.org > February 2017

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 
sufficient.

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

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.


-- 
GitHub Notification of comment by tobie
Please view or discuss this issue at 
https://github.com/w3c/sensors/issues/98#issuecomment-281083570 using 
your GitHub account
Received on Monday, 20 February 2017 13:48:41 UTC

This archive was generated by hypermail 2.4.0 : Monday, 4 July 2022 12:47:53 UTC