LE Audio Development History And Bluetooth LE Audio Module Introduction

1. 클래식 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 프로파일
AVRCP: Audio/Video Remote Control Profile

1681956326 03

2. Bluetooth TWS#1（True Wireless Stereo）
1）The transmission protocol is the same as the classic Bluetooth
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(싱크대) and transmitter(원천).

1681956554 02

3. 블루투스 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 등.

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 Bluetooth low energy technology
5）High-quality, high-speed transmission—LC3 encoding
6）Low latency (minimum 20ms, about 1-200ms below Bluetooth 5.1)
7）Bluetooth version 5.2 or above

1681956128 05

6. LE AUDIO–LC3
1）The LC3 (Low Complexity Communications Codec) 기술 사양은 9월 Bluetooth SIG에서 공식적으로 발표되었습니다. 15, 2020. 모든 오디오 프로필 (프로필) ~의 오디오 LC3 오디오 코덱 장치를 사용해야 합니다..
2)LC3와 SBC의 전송 속도 비교는 다음과 같습니다.

lea devlopment history 1

Feasycom Bluetooth LE AUDIO 모듈 소개

자세한 내용은, Feasycom 팀에 문의하세요.