LC3 (codec)#LC3plus

LC3 provides higher audio quality and better packet loss concealment than SBC, G.722 and Opus, according to subjective testing by the Bluetooth Special Interest Group and ETSI.{{Cite web|url=https://www.anandtech.com/show/15349/bluetooth-sig-announces-le-audio-standard-new-baseline-for-next-decade|title=CES 2020: Bluetooth SIG Announces LE Audio Standard: New Baseline For Next Decade|last=Frumusanu|first=Andrei|website=www.anandtech.com|access-date=2020-01-08}}{{Cite web|url=https://www.androidauthority.com/bluetooth-lc3-codec-1071609/|title=New Bluetooth codec improves sound quality, benefits the hearing impaired|date=2020-01-07|website=Android Authority|language=en-US|access-date=2020-01-08}}{{Cite web|title=Digital Enhanced Cordless Telecommunications (DECT); Study of Super Wideband Codec in DECT for narrowband, wideband and super-wideband audio communication including options of low delay audio connections (≤ 10 ms framing)|url=https://www.etsi.org/deliver/etsi_tr/103500_103599/103590/01.01.01_60/tr_103590v010101p.pdf|last=|first=|date=September 2018|website=ETSI|archive-url=|archive-date=|access-date=}} The conclusion regarding Opus is disputed as the test only included speech audio, but the comparison was made to version 1.1.4 of the reference Opus encoder, using complexity level 0 at 32 kbps and relying on CELT (general audio) instead of the FEC-capable SILK (speech); the test also did not take into account the newer version 1.2 of the Opus encoder released in 2017, where significant improvements were made to low bitrate streams.

Supported systems:

• Android 13;{{Cite web |date=2021-12-22 |title=Android 13 may finally bring full support for Bluetooth LE Audio |url=https://www.xda-developers.com/android-13-may-add-blueooth-le-audio-support/ |access-date=2022-04-22 |website=xda-developers |language=en-US}}{{Cite web |title=Features and APIs Overview - Android 13 Developer Preview |url=https://developer.android.com/about/versions/13/features#btle-audio |access-date=2022-04-22 |website=Android Developers |language=en}}{{Cite web |title=New LC3 Encoder (I5f2f7627) |url=https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/1891675 |access-date=2022-04-22 |website=AOSP Gerrit}}{{Cite web |title=Add new LC3 decoder (I275ea8ba) |url=https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/1936078 |access-date=2022-04-22 |website=AOSP Gerrit}} Google's liblc3 codec is open-source as a standalone GitHub project{{cite web |title=google/liblc3: Low Complexity Communication Codec (LC3) |url=https://github.com/google/liblc3 |website=GitHub |access-date=6 July 2023 |date=26 June 2023}}
• Windows 11, assuming supported Intel CPU and Intel Wifi/bluetooth adapter, on some firmware needs to be released to enable{{Cite web |last=Roth |first=Emma |date=2023-05-23 |title=Windows 11 adds support for Bluetooth's low-energy audio spec |url=https://www.theverge.com/2023/5/23/23733299/windows-11-bluetooth-low-energy-le-support-build |access-date=2023-05-25 |website=The Verge |language=en-US}}{{Cite web |last1=Blog |first1=Windows Experience |last2=Woodman |first2=Aaron |date=2023-05-23 |title=Announcing new Windows 11 innovation, with features for secure, efficient IT management and intuitive user experience |url=https://blogs.windows.com/windowsexperience/2023/05/23/announcing-new-windows-11-innovation-with-features-for-secure-efficient-it-management-and-intuitive-user-experience/ |access-date=2023-05-25 |website=Windows Experience Blog |language=en-US}}
• Zephyr OS{{Cite web |title=modules: Add zephyr lc3 codec by Casper-Bonde-Bose · Pull Request #44225 · zephyrproject-rtos/zephyr |url=https://github.com/zephyrproject-rtos/zephyr/pull/44225 |access-date=2022-04-24 |website=GitHub |language=en}}
• Linux via bluez-alsa{{cite web | url=https://github.com/arkq/bluez-alsa/tree/master/src | title=Bluez-alsa/SRC at master · arkq/Bluez-alsa | website=GitHub }} or BlueZ + PipeWire{{cite web |title=BlueZ » Blog Archive » LE Audio support in PipeWire |url=http://www.bluez.org/le-audio-support-in-pipewire/}}

LC3plus High Resolution mode is a codec defined by ETSI and is not compatible with the LC3 defined by Bluetooth SIG.{{Citation |title=LC3plus High Resolution {{!}}Specification for use as vendor specific codec via Bluetooth A2DP |url=https://www.iis.fraunhofer.de/content/dam/iis/en/doc/ame/Whitepaper/LC3plus_Bluetooth-A2DP-profile.pdf |publication-date=2021 |publisher=Fraunhofer Institute for Integrated Circuits IIS}}{{rp|3}} It's included in the 2019 DECT standard.{{Cite web |title=LC3 / LC3plus: A plus in audio quality and transmission robustness for wireless accessories |url=https://www.digitalmedia.fraunhofer.de/en/veranstaltungen/ibc-2020/trendbrochure/lc3---lc3plus--a-plus-in-audio-quality-and-transmission-robustne.html |access-date=2022-05-01 |website=Fraunhofer-Gesellschaft |language=en}}

On November 9, 2022, the Japan Audio Society (JAS) released a statement certifying LC3plus with the "Hi-Res AUDIO WIRELESS" logo.{{cite web |title="Hi-Res AUDIO WIRELESS" Two new codecs added to "Hi-Res AUDIO WIRELESS" logo's certified codecs. |url=https://www.jas-audio.or.jp/news/post17967 |access-date=9 November 2022 }} LC3plus is the 4th codec to receive this, alongside SCL6 (formerly known as MQair), LDAC and LHDC codecs.

The ETSI implementation of LC3plus is source-available software, subject to a ETSI Intellectual Property Rights Policy and the usual patent restrictions.{{cite web |title=marzzzello/LC3plus |website=GitHub |url=https://github.com/marzzzello/LC3plus |date=29 June 2023}}

Fraunhofer defines a way to use LC3plus over A2DP.

• AptX

{{Reflist}}

Category:Audio codecs

Category:Bluetooth