Google has open sourced the codec 'Lyra' that realizes high sound quality even at an ultra-low bit rate of 3 kbps

Google announced in February 2021 that it has open sourced a new codec 'Lyra ' that can maintain sound quality comparable to the original voice even at an ultra-low bit rate of 3 kbps.

???? Lyra is now being open sourced.

This release allows developers to power their communications apps and take Lyra in powerful new directions by providing the tools needed to encode and decode audio.

Full details ↓ https://t.co/ZDIaXTVw8c

— Google Open Source (@GoogleOSS) April 6, 2021

Lyra --enabled voice calls for the next billion users | Google Open Source Blog
https://opensource.googleblog.com/2021/04/lyra-enabling-voice-calls-for-next-billion-users.html

Google launches Lyra codec in beta to reduce voice call bandwidth usage | VentureBeat
https://venturebeat.com/2021/04/06/google-launches-lyra-codec-in-beta-to-reduce-voice-call-bandwidth-usage/

'Lyra' is a new codec announced by Google in February 2021 and was developed with the aim of enabling high-quality voice calls even on low-speed networks. While most codecs use a method of compressing and transmitting audio signals for each sample to improve sound quality, Lyra uses machine learning to 'compress and transmit only the characteristic parts of the extracted audio and receive it. We have achieved an ultra-low bit rate of 3kbps and high sound quality by the method of 'reconverting to a waveform on the side and playing it from the speaker'.

The following article explains what Lyra-compressed audio looks like.

Google develops codec 'Lyra' that realizes high sound quality even at a low bit rate of 3 kbps --GIGAZINE

About this Lyra, on April 6, 2021 local time, Google announced a new 'open source'. The published Lyra is available at:

GitHub --google / lyra: A Very Low-Bitrate Codec for Speech Compression
https://github.com/google/lyra

In a statement, Google said, 'In developing countries, the potential demand of 1 billion Internet users is expected, but the reliability of network connections is low, and the promise that'technology will connect people'has been fulfilled. No. Lyra, which compresses audio data to 3kbps, can save important bandwidth required in developing countries, etc. '' This release is a 64-bit version of Arm's Android platform and development using Linux. It provides the tools needed to process voice with environment-optimized Lyra. We plan to extend our code base and work with the community to support other platforms. ' doing.