Streaming Audio with Bluetooth : A Deep Dive into A2DP and LE Audio
DOI:
https://doi.org/10.32628/CSEIT25112506Keywords:
Bluetooth Audio Streaming, Audio Codecs, Power Efficiency, Bluetooth Profiles, Wireless Connectivity, Low Complexity CodecAbstract
The evolution of Bluetooth audio streaming has been significantly shaped by the adoption of various audio codecs, with A2DP (Advanced Audio Distribution Profile) and AVRCP (Audio/Video Remote Control Profile) serving as its foundation. These codecs each come with their own set of trade-offs, which include bitrate, latency, compatibility, and power usage. While Bluetooth technology has seen advancements in terms of versions and capabilities, current implementations still face limitations. These limitations have paved the way for the emergence of Bluetooth Low Energy Audio as a potential solution to address the challenges related to power consumption, particularly in specific use cases. This article provides a detailed comparison of existing audio codecs supported in A2DP, highlighting the limitations of classic Bluetooth audio and how LE Audio's enhancements address those challenges.
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References
Wikipedia, “Bluetooth Special Interest Group.” [Online]. Available: https://en.wikipedia.org/wiki/Bluetooth_Special_Interest_Group
Bluetooth Insight, “Bluetooth Power Classes,” 2008. [Online]. Available: http://bluetoothinsight.blogspot.com/2008/01/bluetooth-power-classes.html
Bluetooth, “2024 bluetooth market updates.” [Online]. Available: https://www.bluetooth.com/2024-market-update/
Wikipedia on SBC codec https://en.wikipedia.org/wiki/SBC_(codec)
Soundguys’s Understanding Bluetooth Codecs [Online]. Available: https://www.soundguys.com/understanding-bluetooth-codecs-15352/
Bluetooth, “Headset Profile.” [Online]. Available: https://www.bluetooth.com/specifications/specs/hsp-1-2/
Developers, “Bluetooth Profiles.” [Online]. Available: https://developer.android.com/develop/connectivity/bluetooth/profiles
Vanessa McCuaig, “Bluetooth Connectivity Score and Tests,” RTINGS, 2023. [Online]. Available: https://www.rtings.com/headphones/tests/connectivity/bluetooth-connection
ValdikSS, “Audio over Bluetooth: most detailed information about profiles, codecs, and devices,” Habr, 2019. [Online]. Available: https://habr.com/en/articles/456182/
John Leonard J, “The evolution of Bluetooth audio,“ Nordic semiconductor. [Online]. Available: https://blog.nordicsemi.com/getconnected/the-evolution-of-bluetooth-audio
YK Huang, “A Comprehensive Guide on Different Bluetooth Versions, “ https://www.mokosmart.com/guide-on-different-bluetooth-versions/
Inline audio blog “https://www.inline.audio/le-audio”
J. Jangid, "Secure microservice communication in optical networks," Journal of Information Systems Engineering and Management, vol. 10, no. 21s, 2025. doi: 10.52783/jisem.v10i21s.3455
Recommendation ITU-R BS 1116.3, Methods for the subjective assessment of small impairments in audio systems specification https://www.itu.int/dms_pubrec/itu-r/rec/bs/R-REC-BS.1116-3-201502-I!!PDF-E.pdf
A Technical overview of LC3 https://www.bluetooth.com/blog/a-technical-overview-of-lc3/
Perfect sound, no strings attached. LC3/LC3plus ensure excellent sound when transmitting via Bluetooth & Co https://www.iis.fraunhofer.de/en/profil/what-makes-us-special/jb/2023/lc3-lc3plus.html
Performance characterization of Low Complexity Communication Codec - Bluetooth Whitepaper: https://www.bluetooth.com/wp-content/uploads/2023/07/LC3Characterization_WP.pdf?utm_campaign=le-audio&utm_source=internal&utm_medium=blog&utm_content=a-technical-overview-of-lc3
What is Bluetooth LC3 codec? Is it better than SBC? https://www.makeuseof.com/what-is-lc3-bluetooth-codec-is-it-better-than-sbc/
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