What is the principle of bluetooth speaker bluetooth speaker with headphone

Principle analysis
Ordinary portable speakers directly obtain the audio signal source through the 3.5mm audio plug, and then amplify the audio signal through the internal amplifier circuit and then push the speaker to sound. Now connect the audio output of the Bluetooth headset to the 3.5mm plug of the portable speaker in parallel, so that the mobile phone can send audio information to the Bluetooth headset through Bluetooth, and the speaker can amplify the audio signal sent by the Bluetooth headset to achieve the purpose of amplification. The approximate process is electricity → magnetism → piston movement → eardrum feeling. www.bjbjaudio.com

Bluetooth is a short-range wireless communication technology that replaces data cables. It builds point-to-point, or point-to-multipoint, information exchange through low-bit-rate radio waves. About the Bluetooth transmission of audio streams can be done in two ways: www.bjbjaudio.com 

1. Transmission through PCM module
The audio file is closed through the audio player (eg: Iedia Player), and the Audio driver is called. After the audio file is decoded, it is input to the PCN output of the Bluetooth module on the Host side by PCM. The module is sent to the client-side Bluetooth device.
After the client-side Bluetooth device passes through the wireless receiver module, it is filtered and stabilized, and after being processed by the micro-processing chip, it must be broadcast by the Speaker. www.bjbjaudio.com

2. Transmission through emulated UART
By setting the registry [HKEY LOCAL MACHINE\Services\BTAGSvc] IsEnabled = 1, the system will automatically read the voice gateway (AG) service when it is booted.
First, by manually equipping the created love tooth device and the lient love tooth device chain exchange (for non-connected asynchronous links), then call AG OPE ATTO in aplicniton or hudi Drive, the new bluetooth device on the creation side is connected with the (lin-side bluetooth) Device s0 (connected synchronous link), then A0 is automatically sent to vaveutiaage(WATEOUT)i, WONV BT SCO AUDIO CONTROL.OTRUE): thus creating an underground channel between udin and bluetooth chip, that is, building audio Streaming transmission to the Bluetooth module. www.bjbjaudio.com

Then, the audio stream packet is sent via the RF module via the host-side Bluetooth module. After the client Bluetooth headset takes over the wireless audio package, it is filtered, stabilized, and processed by the microprocessing chip, and then transmitted to the audio codec chip by PCM, and finally broadcast by the Speaker. www.bjbjaudio.com