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For context, FreeDV is an SDR system based on Codec2, which is a codec designed to pick up at bitrates lower than where Opus stops being useful, which is about

For context, FreeDV is an SDR system based on Codec2, which is a codec designed to pick up at bitrates lower than where Opus stops being useful, which is about 12kb/s

throw0101a 5y ago
Codec2 goes up to 'only' 3200b/s. Seems like there's a hole there for open codec between 3kb/s and 6/12kb/s.
- LeoPanthera 5y ago
  That hole is mostly covered by G.729 and AMR-NB. https://en.wikipedia.org/wiki/G.729 https://en.wikipedia.org/wiki/G.729 https://en.wikipedia.org/wiki/Adaptive_Multi-Rate_audio_codec https://en.wikipedia.org/wiki/Adaptive_Multi-Rate_audio_code...
  - throw0101a 5y ago
    > That hole is mostly covered by G.729 and AMR-NB. G.729 seems to be open with many/most patents expiring in 2017. AMR-NB appears to need licensing, so not as open as Codec2 or Opus. Regardless: if Codec2 could be pulled up and/or Opus pulled down, then most audio applications could do with really only two libraries.