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2. Bluetooth - Wikipedia

   en.wikipedia.org/wiki/Bluetooth

   Bluetooth is a short-range wireless technology standard that is used for exchanging data between fixed and mobile devices over short distances and building personal area networks (PANs). In the most widely used mode, transmission power is limited to 2.5 milliwatts, giving it a very short range of up to 10 metres (33 ft).

3. SBC (codec) - Wikipedia

   en.wikipedia.org/wiki/SBC_(codec)

   SBC, or low-complexity subband codec, is an audio subband codec specified by the Bluetooth Special Interest Group (SIG) for the Advanced Audio Distribution Profile (A2DP). SBC is a digital audio encoder and decoder used to transfer data to Bluetooth audio output devices like headphones or loudspeakers. It can also be used on the Internet.

4. aptX - Wikipedia

   en.wikipedia.org/wiki/AptX

   The aptX audio codec is used for consumer and automotive wireless audio applications, notably the real-time streaming of lossy stereo audio over the Bluetooth A2DP connection/pairing between a "source" device (such as a smartphone, tablet or laptop) and a "sink" accessory (e.g. a Bluetooth stereo speaker, headset or headphones).

5. List of Bluetooth profiles - Wikipedia

   en.wikipedia.org/wiki/List_of_Bluetooth_profiles

   Most Bluetooth headsets implement both Hands-Free Profile and Headset Profile, because of the extra features in HFP for use with a mobile phone, such as last number redial, call waiting and voice dialing. The mobile phone side of an HFP link is Audio Gateway or HFP Server. The automobile side of HFP link is Car Kit or HFP Client.

6. Comparison of audio coding formats - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_audio_coding...

   Bluetooth SIG: 2003 A2DP 1.3 (2012-07-24) Free for Bluetooth: A2DP: BlueZ, FFmpeg Bluetooth audio Yes No No Yes No Shorten: Tony Robinson 1993-03-30 3.6.1 (2007-03-19, final release) Free Shorten FFmpeg (decoding only) - Yes No Yes No (with commercial use restriction) No SILK: Skype Limited: 2009-01-07 Merged into Opus: Free Skype: SILK Speech ...

7. L2HC - Wikipedia

   en.wikipedia.org/wiki/L2HC

   L2HC allows high-resolution audio streaming over Bluetooth or NearLink with lossless data compression of digital music. It is a high-quality Bluetooth based on the A2DP Bluetooth protocol and NearLink based on its native L2HC 3.0+ StarLink protocol with Polar protocol by Huawei and allows a bit-rate of up to 1.5Mbps compared to SBC's bit rate ...