SBC, AAC, aptX, etc.
1. SBC: The most common Bluetooth transmission protocol, 99% of Bluetooth headsets support it. In terms of transmission protocol, it supports 44khz/16bit audio, the highest bit rate is 328kbps, the delay is about 220ms, and the sound quality is relatively good. More common.
2. AAC: The transmission protocol mainly promoted by Apple is similar to SBC. It supports 44khz/16bit audio, the highest bit rate is 512kbps, the delay is about 100ms, and the sound quality is slightly better than SBC.
3. aptX: Qualcomm patent, supports 48khz/16bit audio, the highest bit rate is 352kbps, the delay is about 40ms, the sound quality is slightly better than SBC, but the overall improvement is not big.