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google / lyra

A Very Low-Bitrate Codec for Speech Compression
Apache License 2.0
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Can Lyra be parameterized? #113

Open psommerfeld opened 1 year ago

psommerfeld commented 1 year ago

I'm wanting to try to modify Lyra to try encoding at 1200 bps or even sub-1000. I've just started looking at Lyra. Has anyone looked at the difficulty of adding a custom bitrate?

mchinen commented 1 year ago

Hi @psommerfeld, thanks for the question. We are looking into releasing a model that can be used for the current rates as well as lower bitrates, including the range you mention. These would be low quality but intelligible.

psommerfeld commented 1 year ago

Wow that would be great! I have been looking at 'Codec 2' https://github.com/drowe67/codec2/discussions which is intelligible at 700 bps, and even 450 bps. I'd love to see how Lyra does at those bitrates!

On Wed, Jan 4, 2023 at 5:20 PM Michael Chinen @.***> wrote:

Hi @psommerfeld https://github.com/psommerfeld, thanks for the question. We are looking into releasing a model that can be used for the current rates as well as lower bitrates, including the range you mention. These would be low quality but intelligible.

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koencremers20 commented 1 year ago

Hi @psommerfeld, thanks for the question. We are looking into releasing a model that can be used for the current rates as well as lower bitrates, including the range you mention. These would be low quality but intelligible.

Is there any news on this topic?

cloudwiser commented 9 months ago

Yes - I'm also interested in bitrates lower than the current 3.2kps minimum for new application. Is there any news on the release of the Soundstream tflite models that would support encode and decode of a bitrate in the 1.5-to-2.0 kps range? Thanks!