Google has unveiled Lyra, a new technology that allows Duo, and soon other apps, to offer natural-sounding voice chat with as little as 3 kilobytes per second of network bandwidth.
With so many of us still unable to visit with loved ones, video calling apps have played a key role in keeping us all connected to one another, with Google Duo and Meet hosting over 1 trillion minutes of video last year alone. However, this has also put a major strain on internet infrastructure around the world, and most video calling methods outright exclude anyone with a low-grade internet connection.
To help with this, Google has developed a new audio codec called Lyra that is specifically optimized to offer recognizable, understandable, and natural-sounding human speech in as small of a space as possible. As explained on the Google AI Blog, this was done with the assistance of a machine learning model, which was trained on “thousands of hours of audio with speakers in over 70 languages” to ensure Lyra could be usable by as many people as possible. More importantly, Lyra is efficient enough to be able to run on anything from a high-end cloud server to a mid-range smartphone with only 90ms of latency.
As can be seen — or rather heard — from the video above, Lyra offers audio that, while noticeably lower quality than a normally encoded recording, is distinctly recognizable as the speaker’s voice while managing to use incredibly little data. There are some more samples of speech in Lyra compared to other low-bandwidth audio codecs, over on the Google AI Blog.
Lyra will soon be getting its first real-world usage as it is rolling out now to Google Duo for Android, where the codec will be used for calls made on low-speed connections, with Google making particular note of dialup connections and rural areas in India and Brazil only offering a 2G network connection. From there, Google plans to release Lyra as open source, allowing other companies to offer low-bandwidth Lyra audio in their own apps.
More on Google Duo:
- Galaxy S21 series can apply custom backgrounds, blur to video calling apps including Google Duo
- Google Duo may soon stop working on uncertified Android devices
- Google Duo adds L’Oreal lipstick filter to glam up your video calls
Author: Kyle Bradshaw
Source: 9TO5Google
