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For super low bitrate speech, (1.44MB/30 minutes is 6.4kbps), codec2 is better than Opus, and can go to even lower bitrates. When combined with WaveNet, the aud

For super low bitrate speech, (1.44MB/30 minutes is 6.4kbps), codec2 is better than Opus, and can go to even lower bitrates. When combined with WaveNet, the audio quality is incredible, though required compute power is ridiculous. https://auphonic.com/blog/2018/06/01/codec2-podcast-on-floppy-disk/#wavenet-examples https://auphonic.com/blog/2018/06/01/codec2-podcast-on-flopp...

microcolonel 7y ago
> For super low bitrate speech, (1.44MB/30 minutes is 6.4kbps), codec2 is better than Opus At the top end of that, I think that's not the case. Certainly starting at 3200bps, Opus just becomes a non-option (and codec2 becomes an option). I have a trove of librivox audiobooks in codec2 from some tests I did, and I've given some of them extensive listens to get a feel for it. Without an improved decoder that isn't a WaveNet, it's still not always fun trying to understand what is said.
est31 7y ago
> the audio quality is incredible, though required compute power is ridiculous. LPCnet gives similar quality with much less compuation needed: http://www.rowetel.com/wordpress/?p=6482 http://www.rowetel.com/wordpress/?p=6482 https://people.xiph.org/~jm/demo/lpcnet/ https://people.xiph.org/~jm/demo/lpcnet/ https://people.xiph.org/~jm/demo/lpcnet_codec/ https://people.xiph.org/~jm/demo/lpcnet_codec/
- fsiefken 7y ago
  Yes, amazing, but can it be played through Chrome, VLC, mpv or more importantly Android and iOS?
  - cbhl 7y ago
    Broad compatibility is important, but is there someone who has actually hooked up a USB floppy drive to an Android or iPhone or iPad and read files off of it?
    - fsiefken 7y ago
      ha no, i don't think so :-) All these devices didn't exist when the floppy drive went out of vogue. I'm not sure if there even are USB floppydisk drivers for Android or iOS. Technically Android is linux (and iOS bsd) so I suppose there is a /dev/fd0 capability somewhere. I meant that LPCnet is really awesome, but when I would distribute a podcast in this format (floppy or rss) I would like it to be able to be played on devices and OS's with support for it - otherwise the audience can't play it.
lamby 7y ago
> required compute power is ridiculous Can you elaborate or put some concrete numbers on this? :)

microcolonel 7y ago

> For super low bitrate speech, (1.44MB/30 minutes is 6.4kbps), codec2 is better than Opus At the top end of that, I think that's not the case. Certainly starting at 3200bps, Opus just becomes a non-option (and codec2 becomes an option). I have a trove of librivox audiobooks in codec2 from some tests I did, and I've given some of them extensive listens to get a feel for it. Without an improved decoder that isn't a WaveNet, it's still not always fun trying to understand what is said.

est31 7y ago

> the audio quality is incredible, though required compute power is ridiculous. LPCnet gives similar quality with much less compuation needed: http://www.rowetel.com/wordpress/?p=6482 http://www.rowetel.com/wordpress/?p=6482 https://people.xiph.org/~jm/demo/lpcnet/ https://people.xiph.org/~jm/demo/lpcnet/ https://people.xiph.org/~jm/demo/lpcnet_codec/ https://people.xiph.org/~jm/demo/lpcnet_codec/

fsiefken 7y ago
Yes, amazing, but can it be played through Chrome, VLC, mpv or more importantly Android and iOS?
- cbhl 7y ago
  Broad compatibility is important, but is there someone who has actually hooked up a USB floppy drive to an Android or iPhone or iPad and read files off of it?
  - fsiefken 7y ago
    ha no, i don't think so :-) All these devices didn't exist when the floppy drive went out of vogue. I'm not sure if there even are USB floppydisk drivers for Android or iOS. Technically Android is linux (and iOS bsd) so I suppose there is a /dev/fd0 capability somewhere. I meant that LPCnet is really awesome, but when I would distribute a podcast in this format (floppy or rss) I would like it to be able to be played on devices and OS's with support for it - otherwise the audience can't play it.

lamby 7y ago

> required compute power is ridiculous Can you elaborate or put some concrete numbers on this? :)