Opus 1.5 is the first release to make extended use of ML in the encoder and
decoder. Major changes since 1.4 include:
- Significant improvement to packet loss robustness using Deep Redundancy (DRED)
- Improved packet loss concealment through Deep PLC
- Low-bitrate speech quality improvements down to 6 kb/s wideband
- Improved x86 (AVX2) and ARM (Neon) optimizations
- Support for 4th and 5th order ambisonics