LE Audio Development History And Bluetooth LE Audio Module Introduction

1. 권위 있는 블루투스
1）One transmitter connected to one receiver
2）Music mode: A2DP, controlled by AVRCP protocol
Music pause/play, up and down song/volume up and down
3）Call mode: HFP (핸즈프리 프로필)
Telephone hands-free protocol, answer/hang up/reject/voice dialing, 등.

A2DP: 고급 오디오 배포 프로필
AVRCP: Audio/Video Remote Control Profile

1681956326 03

2. 블루투스 TWS#1（True Wireless Stereo）
1）The transmission protocol is the same as the classic 블루투스
2）The left /right earphone is connected to the mobile phone,
The left or right earphones are also connected to each other, so the earphones are both receiver(Sink) and transmitter(Source).

1681956554 02

3. Bluetooth TWS#2（True Wireless Stereo）
1）The transmission protocol is the same as the classic Bluetooth
2）The mobile phone is connected to the left/right earphone at the same time, and the left and right channels are automatically assigned

1681956491 1

4. Audio Full-duplex
1）The transmission protocol is the same as the classic Bluetooth
2）Connect two headphones at the same time, regardless of the left and right channels
3）Earphone 1 and earphone 2 can talk each other
4）Module recommend: BT901, BT906, BT936B, BT1036B etc.

1681956330 04

5. Bluetooth LE AUDIO
1）Broadcast function: the mobile phone can connect multiple 블루투스 devices at the same time, including Bluetooth headsets, hearing aids etc.
2）Sharing function: multi-person connection
3）Multi-point connection, such as mobile phone, ipad, computer, 등. at the same time
4）Runs on 블루투스 저에너지 기술
5）High-quality, high-speed transmission—LC3 encoding
6）Low latency (minimum 20ms, about 1-200ms below 블루투스 5.1)
7）Bluetooth version 5.2 or above

1681956128 05
오디오 Development History 111

6. LE AUDIO–LC3
1）The LC3 (Low Complexity Communications Codec) technical specification was officially released by the Bluetooth 말하다 on September 15, 2020. All audio profiles (프로필) ~의 오디오 will be forced to use the LC3 audio codec device.
2）The transmission rate comparison between LC3 and SBC is as follows

lea devlopment history 1

피지컴 Bluetooth LE AUDIO Module Introduction

자세한 내용은, please contact Feasycom team.