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[[Audio]] | [[Voice]]
- Lyra: A New Very Low-Bitrate Codec for Speech Compression
-- https://ai.googleblog.com/2021/02/lyra-new-very-low-bitrate-codec-for.html
- https://twitter.com/kazunori_279/status/1365095215686578178
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この3kbpsでこの音質すごい。ログメルスペクトログラムで特徴抽出、低帯域と低遅延に特化したWaveRNN系モデルでエンコード。
- https://twitter.com/yohhoy/status/1365115303667978243
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言語差異どうなんかなーと思ったけど "We’ve trained Lyra with thousands of hours of audio with speakers in over 70 languages using open-source audio libraries and then verifying the audio quality with expert and crowdsourced listeners." そこは考慮されてるぽ