In the Bluetooth setting interface, we need to make sure that Bluetooth is turned on. Then, we need to turn on the Bluetooth switch of the device, and the corresponding device name will be displayed on the ipad. Among all the Bluetooth audio codes, SBC audio code is the oldest, with a history of 2 years. It is a mandatory Bluetooth audio code in the Bluetooth audio transmission protocol.

introduction of bluetooth support coding for p>ipad

SBC compresses audio, transmits it through bluetooth wireless connection, and then decompresses it at the remote end and plays it. SBC is the original Bluetooth audio transmission scheme, and the time is too old, so the problem of audio compression is more serious. Due to the limited bandwidth of wireless transmission, SBC performs lossy processing when coding each sub-band.

let's take MP3 files as an example. The transcoding process is from MP3 to PCM to SBC to PCM. Because details will be lost in each transcoding, MP3 files of the same specification will lose more details in wireless environment than in wired environment, and the listening sense will not be as good as that in wired transmission. People are not optimistic about the sound quality of Bluetooth audio in the early stage of its development, mainly because of the bottleneck of SBC technology itself.