[–] Gordonjcp 4y ago ↗ It definitely sounds better than AMBE2 in DMR. [–] anilakar 4y ago ↗ DMR's AMBE+2 works reasonably well for English, but certain languages sound as if the speaker was drunk and having a stroke at the same time.
[–] anilakar 4y ago ↗ DMR's AMBE+2 works reasonably well for English, but certain languages sound as if the speaker was drunk and having a stroke at the same time.
[–] LeoPanthera 4y ago ↗ 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 4y 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 4y ago ↗ That hole is mostly covered by G.729 and AMR-NB.https://en.wikipedia.org/wiki/G.729https://en.wikipedia.org/wiki/Adaptive_Multi-Rate_audio_code... [–] throw0101a 4y 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.
[–] throw0101a 4y 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 4y ago ↗ That hole is mostly covered by G.729 and AMR-NB.https://en.wikipedia.org/wiki/G.729https://en.wikipedia.org/wiki/Adaptive_Multi-Rate_audio_code... [–] throw0101a 4y 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.
[–] LeoPanthera 4y ago ↗ That hole is mostly covered by G.729 and AMR-NB.https://en.wikipedia.org/wiki/G.729https://en.wikipedia.org/wiki/Adaptive_Multi-Rate_audio_code... [–] throw0101a 4y 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.
[–] throw0101a 4y 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.
[–] ariendj 4y ago ↗ David Rowe's blog at rowetel.com details a lot of the development behind codec2 and is always an interesting read.
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[ 146 ms ] story [ 725 ms ] threadhttps://en.wikipedia.org/wiki/G.729
https://en.wikipedia.org/wiki/Adaptive_Multi-Rate_audio_code...
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.