Bluetooth Knowledge


Bluetooth LE Audio / AURACAST 

Bluetooth LE Audio  = BLE + LC3 = AURACAST

LC3 = Low Complexity Communications Codec


Bluetooth LE / BLE IoT


Bluetooth Classic Audio

Bluetooth Classic Audio = Bluetooth Classic + SBC / AAC / LDAC / aptX

SBC = Subband Codec

AAC = Advanced Audio Coding

LDAC = SONY Proprietary Audio Coding

aptX = Audio Processing Technology


Feature Bluetooth Classic Bluetooth Low Energy (BLE)
Power consumption High (approx 1W) Low (approx 0.01W-0.5W)
Communication Range 10m to 30m 10m to 30m
Latency 100 ms 6 ms
Data Rate 1Mbps for BR

2-3Mbps for EDR

RF Bandwidth 2.4 GHz ISM band (2400-2483.5 MHz) 2.4 GHz ISM band (2400-2483.5 MHz)
Modulation Technique GFSK for BR

8-DPSK or π/4-DQPSK for EDR

Number of Channels 79 channels each of width 1Mhz 40 channels each of width 2MHz
Spreading Frequency Hopping Spread Spectrum (FHSS) Frequency Hopping Spread Spectrum (FHSS)
Data link layer protocol Time Division Multiple Access (TDMA) Time Division Multiple Access (TDMA)
Error detection 8 bit CRC or 16 bit CRC, and ACKs 24 bit CRC, ACKs
Maximum number of active slaves 7 Unlimited
Communication Direction Bidirectional Unidirectional
Device Pairing Required Not Required