Bluetooth audio had a history starting from the headset for your mobiles phones.
To understand how Bluetooth wireless audio works first we need to talk about audio codec. In previous blog we had explain the audio compression and how it works for the streaming audio online. If you apply the same concept. It is not hard to understand Bluetooth wireless audio. Traditionally we use a pair of wires to transmit audio to the left and right earphones.
The function of the wires are to transmit the audio signal to the earphones for the speakers to reproduce sound. The material of the wire will affect the quality of the signal arrived at earphones. So the good sound need good wires. In order to replace the wires. We need to turn that audio signal to radio wave. So it can travel through the air. Then it reassembled inside the earphones to reproduce sound. Bluetooth technology is one of the most cost effective way to achieve this. Use the principle of audio data compression to reduce the data size to achieve the fast data transmitting. To be able to do that we need to again compress the audio signal before send out.The popular codec for Bluetooth audio compression are SBC, APTX and LE. You can see the quality difference below.