Opus — новый кодек от Xiph

[VEG]

Вышел libopus 1.3.1:

• This Opus 1.3.1 minor release fixes an issue with the analysis on files with digital silence (all zeros), especially on x87 builds (mostly affects 32-bit builds). It also includes two new features:
• A new OPUS_GET_IN_DTX query to know if the encoder is in DTX mode (last frame was either a comfort noise frame or not encoded at all)
• A new (and still experimental) CMake-based build system that is eventually meant to replace the VS2015 build system (the autotools one will stay).

Win32 binaries: opus-tools-0.2-opus-1.3.1.zip

[VEG]

Вышло обновление библиотеки для проигрывания файлов в формате Opus, opusfile 0.12:

• Fix stack overflow buffering out-of-sequence streams.
• Fix possible divide-by-zero.
• Fix issues with seeking in the win32 backend.
• Fix an issue where the seek algorithm could be confused by stream data changing between reads.
• Clean up compiler and scan-build warnings.
• Avoid use of the deprecated ftime() function which has Y2038 problems.
• Remove undefined behaviour memcpy(NULL) in op_read_native().
• Visual Studio project files updated for libogg 1.3.4 library name change.
• Various build systems updates.
• Various integration and testing environment improvements.

Скачать исходники: https://www.opus-codec.org/downloads/

[VEG]

Результаты теста кодеков на 192kbps:

Источник: https://hydrogenaud.io/index.php?topic=120007.0

[VEG]

Вышел Opus 1.4. Все изменения полезны для передачи голоса через интернет:

- Improved tuning of the Opus in-band FEC (LBRR). See the https://gitlab.xiph.org/xiph/opus/-/issues/2360 for details.
- Added a OPUS_SET_INBAND_FEC(2) option that turns on FEC, but does not force SILK mode (FEC will be disabled in CELT mode).
- Improved tuning and various fixes to DTX.

https://github.com/xiph/opus/releases/tag/v1.4
http://lists.xiph.org/pipermail/opus/2023-April/004578.html
https://www.opennet.ru/opennews/art.shtml?num=59009

[VEG]

This Opus 1.4 major release brings the following improvements and fixes:

• Improved tuning of the Opus in-band FEC (LBRR). See the issue for details
• Added a OPUS_SET_INBAND_FEC(2) option that turns on FEC, but does not force SILK mode (FEC will be disabled in CELT mode)
• Improved tuning and various fixes to DTX
• Added Meson support, improved CMake support In addition to the improvements above, this release includes many minor bug fixes.

Additionally, we have begun experiments on upcoming neural packet loss concealment and deep redundancy (DRED) features. Although not included in this release, you can see two IETF drafts describing the proposed extension and redundancy mechanisms. The code is also available on this development branch.

https://www.opus-codec.org/release/stable/2023/04/20/libopus-1_4.html
https://www.amazon.science/blog/neural-encoding-e ... recovery-of-lost-audio-packets
https://hydrogenaud.io/index.php/topic,124082

[VEG]

Opus 1.5 is the first release to make extended use of ML in the encoder and decoder. You can read all the details in this release demo page. In summary, 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 enhancement down to 6 kb/s wideband
• Improved x86 (AVX2) and Arm (Neon) optimizations
• Support for 4th and 5th order ambisonics

In addition to the improvements above, this release includes many minor bug fixes.

Добавлено спустя 6 часов 43 минуты:
https://opennet.ru/60731/