Re: WebRTC NV Use Cases

If you're at the point where you're worried about UDP checksum, then you've
probably got bigger problems.  There's a lot of per-packet processing that
happens that will hurt latency more than that.  And at least in Chrome,
there's a process hop.

On Mon, Jun 18, 2018 at 8:48 PM Mészáros Mihály <misi@niif.hu> wrote:

> I have referred on packet checksum on udp packets.
> If I recall correctly I heard from someone that one of such tool does not
> make udp checksum check to lower the latency.
>
> On 2018. 06. 18. 20:20, Peter Thatcher wrote:
>
> That's something that already comes with the encoder and transport objects
> we're proposing.  I'll add this as a use case with those requirements.
>
> I don't think the WG will agree to removing encryption.
>
> What checksum are you referring to?
>
>
>
>
> On Mon, Jun 18, 2018 at 5:23 PM Mészáros Mihály <misi@niif.hu> wrote:
>
>> You are right it is low latency audio and video.
>>
>> The key how low it could be. Ultra low latency is important for
>> performing arts.
>>
>> Requirements what I could think about is to turning off the jitter buffer
>> totally, raw audio codec, (may skip encryption), no packet checksum
>> counting, so to avoid anything that could add any latency.
>>
>> Misi
>>
>> 2018-06-18 17:05 keltezéssel, Peter Thatcher írta:
>>
>> How is it different than an audio call, which allows attempts to be as
>> low-latency as possible?  Is there a requirement for this use case that we
>> don't already have?
>>
>> On Mon, Jun 18, 2018 at 11:43 AM Mészáros Mihály <bakfitty@gmail.com>
>> wrote:
>>
>>> 2018-05-09 21:29 keltezéssel, Bernard Aboba írta:
>>>
>>> On June 19-20 the WebRTC WG will be holding a face-to-face meeting in Stockholm, which will focus largely on WebRTC NV.
>>>
>>> Early on in the discussion, we would like to have a discussion of the use cases that WebRTC NV will address.
>>>
>>> Since the IETF has already published RFC 7478, we are largely interested in use cases that are either beyond those articulated in RFC 7478, or use cases in the document that somehow can be done better with WebRTC NV than they could with WebRTC 1.0.
>>>
>>> As with any successful effort, we are looking for volunteers to develop a presentation for the F2F, and perhaps even a document.
>>>
>>>
>>> Hi,
>>>
>>> Let me add one possible WebRTC Use Case: Ultra Low Latency audio/ video
>>> for musical performances and other performing arts with WebRTC
>>> Tuned WebRTC stack for ultra low latency.
>>>
>>> SW/HW solution that we use actually to solve the use case
>>> e.g.
>>>
>>>    - http://www.ultragrid.cz/
>>>    - https://www.garr.it/en/communities/music-and-art/lola
>>>
>>> Read more on tools and use case on https://npapws.org/ :
>>>
>>>    -
>>>    https://npapws.org/wp-content/uploads/2017/01/S.Ubik-J.Melnikov-Network-delay-management-2017.pptx
>>>    -
>>>    https://npapws.org/wp-content/uploads/2016/02/Performing-Arts-and-Advanced-Networking.pptx
>>>
>>> Regards,
>>> Misi
>>>
>>
>>
>