Dual pass solution (Qualcomm TWS+, Huawei A1)

Qualcomm early adopted the 2.4GHz TWS forwarding solution. In February 2018, Qualcomm launched the TWS+ (TrueWireless Stereo Plus) technology based on QCC5100 series chips. The mobile phone terminal sends two independent left and right channel audio signals to the left and right. headset. This dual-transmission scheme is a Q-to-Q connection technology that requires the support of a Bluetooth chip on the mobile phone. It can only be implemented on mobile phones equipped with Snapdragon 845, 670, 710 and later chips, on other platforms The headset will switch to the traditional high-latency forwarding mode. Although the compatibility is relatively poor, but due to Qualcomm's higher market share in the mobile phone SoC market, this solution also has a certain audience.

Huawei's early TWS headset used Hengxuan's solution. In September 2019, Huawei released the new TWS headset Freebuds 3, equipped with the latest Kirin A1 chip, using self-developed dual-channel synchronous transmission technology, similar to Qualcomm TWS+ technology. Realize that the left and right headphones obtain the left and right channel Bluetooth signals from the mobile phone respectively. This chip is the first certified BT/BLE dual-mode Bluetooth 5.1 SoC, but it also needs to be used with Kirin SOC.

Qualcomm TWS+ solution

Here we make a horizontal comparative analysis of the advantages and disadvantages of the above three categories. It can be seen that in addition to traditional forwarding, the current mainstream chip solutions have solved the problems of connection delay and stability. However, in terms of compatibility, mainstream dual-pass solutions such as Qualcomm TWS and Huawei A1 need to be used in conjunction with the corresponding mobile phone SOC.

Post time: 2020-08-21