NXP 無線雙模 耳機定義
現今市面上有需多無線雙模電競耳機, 其雙模的意思即為 Bluetooth 與 2.4G proprietary 這兩種無線傳輸方式。 2.4G proprietary 無線傳輸方式一般會建置在 USB Dongle 裝置上, 其用途為當設備無 Bluetooth 介面時, 即可使用此裝置來與耳機做連接並撥放音樂, 舉例 PC 當沒有藍牙功能時即可使用,但當使用 Smart Phone 時即透過 Bluetooth 連接並撥放音樂。
與前一代 NxH3670 相比仍看到持續在優化, 且增加許多能與市場競爭優勢的規格, 如 Power Consumption 與 Audio Quality ( LC3 / LC3plus ) 有相當大的競爭優勢 。
※註1: NXP；出處：網址[1]
下圖皆是 NxH3675 的應用場景參考, 2023年6月已於台北 Computex 先展示 Home Audio , 使用 LE-CIS (LE Connected Isochronous Stream) 的架構演示, 也將延伸 Bluetooth Auracast 的概念繼續建置。
此為 Wireless Gaiming Headset 的搭配架構參考, 但若於 True Wireless Stereo, TWS 架構下將不會有 LPC55 MCU 的選用, 而僅用 Bluetooth 做傳輸
NxH3675 要點整理參考:
Industry-Lowest Power 2.4GHz RF Transceiver(1) Fully certified for BLE 5.3, LE Audio
(2) Supporting HAP and HQ audio (TMAP), Auracast profiles
(3) Native support for Isochronous channels
Integrated dual CoolFlux DSP processor
(1) Low power mode at 24MHz, max clock speed at 96MHz
(2) LC3 codec for BLE Audio in CoolFlux ROM
(3) Support for 2 digital microphones & 1 PDM digital audio output
Use case power consumption(1) LE Audio Mono Audio Playback LC3 @ 48kHz: 2.5 mA @ 1.1V
(2) LE Audio Calling with LC3 @ 16kHz: 3.1 mA @ 1.1V
※註1: NXP；出處：網址[1]
[1] https://www.nxp.com/products/wireless/bluetooth-le-audio/ultra-low-power-bluetooth-low-energy-audio-solution-with-integrated-flash:NXH3675
[2] https://www.nxp.com/assets/block-diagram/en/NXH3675.pdf
[3] https://www.nxp.com/docs/en/fact-sheet/NXH3675A4FS.pdf
評論
救世主
7 個月前
巧克力山大
8 個月前