LE Audio Development History And Bluetooth LE Audio Module Introduction

1. Bluetooth classico
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 (Profilo vivavoce)
Telephone hands-free protocol, answer/hang up/reject/voice dialing, ecc.

A2dp: Profilo di distribuzione audio avanzato
Avrcp: Audio/Video Remote Control Profile

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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(Lavello) and transmitter(Fonte).

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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

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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 ecc.

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5. Bluetooth LE AUDIO
1）Broadcast function: the mobile phone can connect multiple Bluetooth 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, ecc. 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

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6. LE AUDIO–LC3
1）The LC3 (Low Complexity Communications Codec) le specifiche tecniche sono state ufficialmente rilasciate da Bluetooth SIG a settembre 15, 2020. Tutti i profili audio (Profili) Di L'audio sarà costretto a utilizzare il dispositivo codec audio LC3.
2）Il confronto della velocità di trasmissione tra LC3 e SBC è il seguente

lea devlopment history 1

Feasycom Bluetooth LE AUDIO Introduzione al modulo

Per maggiori dettagli, si prega di contattare il team Feasycom.