Re: [EXTERNAL] Possible addition to SAUR on minimal frame rates

In addition to the 20 fps recommended minimum frame rate for lipreading and
speech intelligibility, 10 fps is the recommended minimum frame rate for
sign language: Analyzing the intelligibility of real-time mobile sign
language video transmitted below recommended standards:
https://doi.org/10.1145/2661334.2661358

Since 10 fps bound is lower, it shouldn't affect the 20 fps recommendation.




On Tue, Mar 8, 2022 at 8:02 AM White, Jason J <jjwhite@ets.org> wrote:

> By way of additional comment:
>
> Where in the Synchronization Accessibility User Requirements would you
> prefer to add a note on frame rate, with a cross-reference to XR?
>
> Perhaps your longer text on frame rates could be considered later for
> inclusion in the Media Accessibility User Requirements – if the APA Working
> Group decides at some stage to update that document.
>
>
>
>
>
> *From:* Noble, Stephen <steve.noble@pearson.com>
> *Sent:* Thursday, 3 March 2022 9:56
> *To:* White, Jason J <jjwhite@ets.org>; RQTF <public-rqtf@w3.org>
> *Subject:* Re: [EXTERNAL] Possible addition to SAUR on minimal frame rates
>
>
>
> Thanks, Jason. It is clear that video frame rates impact accessibility.
> For instance, as the frame rate diminishes, the effectiveness of
> lip-reading drops, and eventually becomes practically impossible at low
> frame rates. There are studies we could point to on that end. But, as you
> alluded, the question is how do we draw the intersect to synchronization,
> since that is the focus of the SAUR. So perhaps we should simply not use
> the text I wrote, and instead a passing reference to the impact of frame
> rates along with a pointer to the RTC Accessibility User Requirements at
> Section 6.1
> https://www.w3.org/TR/raur/#deaf-users-video-resolution-and-frame-rates
> <https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.w3.org%2FTR%2Fraur%2F%23deaf-users-video-resolution-and-frame-rates&data=04%7C01%7Cjjwhite%40ets.org%7C6f053e8860c74be33f7808d9fd25f203%7C0ba6e9b760b34fae92f37e6ddd9e9b65%7C0%7C0%7C637819161688538196%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=BHn8BqZIknm27LFF2C1FseADbq8go9RgQA9rEGNKSj4%3D&reserved=0>.
> Then, in the SAUR, we would only address the issues directly connected to
> synchronization, such as in the case of caption synchronization. In that
> use case, we could add something like this: "When bandwidth issues and
> other technical limitations cause frame rates to drop below the recommended
> level, it is advised that the video streaming and remote meeting platform
> providers should match the caption timing as referenced by the audio rather
> than the video to reduce temporal display errors." I don't know if there
> are other recommendations, we can add beyond that which are directly
> connected to synchronization.
>
>
>
> --Steve
>
>
>
>
>
>
>
>
>
> *Steve Noble*
>
> Instructional Designer, Accessibility
> Psychometrics & Testing Services
>
> *Pearson*
>
> 502 969 3088
> steve.noble@pearson.com
>
> ------------------------------
>
> *From:* White, Jason J <jjwhite@ets.org>
> *Sent:* Thursday, March 3, 2022 9:16 AM
> *To:* White, Jason J <jjwhite@ets.org>; Noble, Stephen <
> steve.noble@pearson.com>; RQTF <public-rqtf@w3.org>
> *Subject:* RE: [EXTERNAL] Possible addition to SAUR on minimal frame rates
>
>
>
> With apologies for the additional e-mail:
>
> Should anything be said about the relationship between video frame rate
> and synchronization? Otherwise, it isn’t clear that there is a connection,
> or indeed what the connection is. A few sentences that make the link would
> be helpful, it seems to me.
>
>
>
> *From:* White, Jason J <jjwhite@ets.org>
> *Sent:* Thursday, 3 March 2022 9:12
> *To:* Noble, Stephen <steve.noble@pearson.com>; RQTF <public-rqtf@w3.org>
> *Subject:* RE: [EXTERNAL] Possible addition to SAUR on minimal frame rates
>
>
>
>
>
>
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