Google's New Lyra Voice Codec + AV1 Aim For Video Chats Over 56kbps Modems In 2021

[caligula]

Just a reminder: 3G is 144kbit/s

Not true. Even 2G/EDGE/Evolved EDGE provides down link of 600 kbps (real world). See https://en.wikipedia.org/wiki/Enhanc..._GSM_Evolution
Standard 2G/EDGE provides bandwidth up to 236 kbps.

[pal666]

What corpo?

you said you try to avoid "big corpo". so why only big?

[pal666]

In a world where nobody programs for efficiency anymore

i am nobody

[piorunz]

you said you try to avoid "big corpo". so why only big?

Because that's what tooth fairy told me to do.

(stupid questions, stupid answers).

[piorunz]

i am nobody

Reported your post for useless posting/spamming. If you have nothing meaningful to add to this conversation, please don't.

[programmerjake]

I’m not quite sure how the neural network would be better when doing lossless audio codec.

AI and neural networks are really good at guessing things.

Maybe if the purpose is to use AI/neural networks to sort of brute force the best compression possible, and then slowly improve the speed.

The way FLAC works is it stores info to make a decent guess of what the signal is and also stores the difference between the guess and the actual signal. if you can improve the guess, then the difference can be losslessly compressed into a smaller number of bits. My idea is to use a neural net to try to make a really good guess based on previously-decoded audio.

[ssokolow]

Most of rural US, Africa, rural Australia, bandwidth constrained wireless connections including satellite & cell connections at the peripheries of coverage, many areas of Central and South America. Starlink won't be a silver bullet for all of these areas, especially those without the means to afford it. "My cable ISP is out for a few hours" is a distinctly urban first world problem.

The future is already here, it’s just unevenly distributed. -- William Gibson (as paraphrased by others) @ https://quoteinvestigator.com/2012/0...e-has-arrived/

With 56k modems being 1990s late-steampunk era tech, I really wonder how much bandwidth could be squeezed down a dialup line using 2020s near-space-age tech wizardry.

We know what happened to wireless (data) speeds in that space of time.

Often only the last mile is analog anymore. The phone company's internal network is provisioned so that each call gets roughly a 64k ISDN BRI link worth of bandwidth. Less the overhead of running modulated digital data as analog audio through a digital link, and 56k is probably the theoretical maximum. (Heck, from what I remember, at least some jurisdictions have some kind of regulatory restriction or standard that has the side-effect of making 53k the theoretical attainable maximum.)

Rural US is a third world country

I remember hearing a quote that the poor parts of the U.S. are "like a third-world country, but without the hope" back in the 90s.

[Jedibeeftrix]

Who is on 56k modem in 2021? I was when I was a kid. 20 years ago.
Problem with audio video today is not bandwidth, but bufferbloat and latency.

you could potentially look at building a VOIP application over Class C LoraWAN...

[jaxa]

Something like this was about time. In those 8MB AV1 clips, i mean movies, that gets encoded in AV1+Opus, the Opus part ends up taking the most bitrate.

"What are you doing in MY SWAMP?!"

[samtuke]

What's the license and patent situation for Lyra? Can anyone except Google actually use it? What does its machine learning basis mean for usage by home users?