一.蓝牙发射器
蓝牙发射器用于将不带蓝牙的音箱或耳机等播放设备,发射音频使用。接口类型有Type-A,Type-C,USB等。
Realtek的RTL8753BAU可以实现低延时或者一拖二的功能。使用场景如下图:
二.RTL8753BAU规格介绍
■ RTL8753BAU series
■ Dual-mode,Dual Core,BT5.1
◆ MCU:32-bit M4,up to 60 MHz
◆ DSP:Tensilica HiFi-Mini up to 120Mhz
■ Built-in 16Mbits FLASH memory
■ TX 10dBm(typ.) and 10dBm(typ.) maximal output power for Bluetooth classic and BLE,respectively
■ Receive sensitivity(typ.): -94.5 dBm(1M BR),-94 dBm(2M EDR),-97.5 dBm(1M BLE) and -94.5(2M BLE)
■ package: QFN-46 4.5mmX6.5mm
三.RTL8753BAU与RTL8763BF以及8753BFE搭配实现低延时功能
瑞昱RTL8753BAU在于自家BT Audio芯片搭配时,可以实现低延时的效果,并且瑞昱的BT Audio芯片与RTL8753BAU一样,可以实现1拖二功能。在与其他厂商的BT Audio芯片搭配,低延时功能则不存在,效果与普通的通用dongle一样。
RTL8763属于头戴式耳机应用场景,RTL8753BFE属于TWS耳机应用场景,与RTL8753BAU结合使用可达到下列图表中的低延时效果:
四.总结
目前的方案有以下几种供客户可以搭配选择:
方案一:游戏立体声解决方案(低延时)
Gaming stereo headset solution
End2End latency <30ms
Interface support AUX IN and USB
USB audio support
Also a normal bluetooth headset
Low power
RTK Talking Profile sample rate 16K/16bits
Android/IOS/Windows support
方案二:游戏eRWS耳机解决方案(低延时)
Gaming eRWS headset solution
End2End latency <65ms
Interface support AUX IN and USB
USB audio support
Also a normal bluetooth headset
Android/IOS/Windows support
方案三:低延时立体声解决方案(一拖二同时实现低延时)
Low latency stereo headset solution
Two headset End2End latency <40ms
Interface support AUX IN and USB
USB audio support
Normal Bluetooth headset support(no low latency)
Android/IOS/Windows support
方案四:通用dongle解决方案
Max support 2 Bluetooth audio device
Support Bluetooth headset,speaker…
Interface support AUX IN and USB
USB audio support
Android/IOS/Windows support
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