Does Bluetooth Wireless Audio Reduce Sound Quality? 藍牙無線音頻會降低聲音品質嗎？

Bluetooth audio had a history starting from the headset for your mobiles phones.

To understand how Bluetooth wireless audio works first we need to talk about audio codec. In previous blog we had explain the audio compression and how it works for the streaming audio online. If you apply the same concept. It is not hard to understand Bluetooth wireless audio. Traditionally we use a pair of wires to transmit audio to the left and right earphones.

The function of the wires are to transmit the audio signal to the earphones for the speakers to reproduce sound. The material of the wire will affect the quality of the signal arrived at earphones. So the good sound need good wires. In order to replace the wires. We need to turn that audio signal to radio wave. So it can travel through the air. Then it reassembled inside the earphones to reproduce sound. Bluetooth technology is one of the most cost effective way to achieve this. Use the principle of audio data compression to reduce the data size to achieve the fast data transmitting. To be able to do that we need to again compress the audio signal before send out.The popular codec for Bluetooth audio compression are SBC, APTX and LE. You can see the quality difference below.

The different capacity of audio quality restoration depends on the codecs. Let's put this concept to wire's quality. Newer generation Bluetooth codec means better quality wire that can transmit faster and more audio data. This also means the better audio quality and lower latency. Usually from Bluetooth 4.2 APTX HD is claim to be the hi quality and resolution. You can see from above the audio spectrum. It is almost identical to the source audio. That means from Bluetooth 5.0 the audio quality is almost indistinct-able from the source.

OPSIS II use most recent Bluetooth 5.2 technology to make sure the audio lossless audio transmitting. Furthermore, OPSIS II allow you to sync together more than two speakers at low latency. This means you can unlimited the use of the OPSIS II in different configuration fo the best 360 audio experience. The OPSIS II's Bluetooth requires no external connections. Simply turn one of your OPSIS II into a master to allow you connect as many OPSIS II as you want anywhere. ==================================================================================================================================================================

藍牙音頻的歷史始於手機的耳機。

要首先了解藍牙無線音頻的工作原理，我們需要討論音頻編解碼器。在先前的博客中，我們解釋了音頻壓縮及其在線流音頻中的工作方式。如果您應用相同的概念，不難理解藍牙無線音頻。傳統上，我們使用一對電線將音頻傳輸到左右耳機。

電線的功能是將音頻信號傳輸到耳機，以使揚聲器再現音頻。線材會影響到達耳機的信號質量。為了更換導線將音頻從您的個人設備傳輸到耳機。我們需要將該信號轉換為無線電波，以便它可以在空中傳播。然後在耳機內部重新組裝音頻以重現音頻。藍牙技術是實現這一目標的最具成本效益的方法之一。基於相同的原理，音頻數據壓縮需要減少數據大小以實現快速數據傳輸以提供更好的音頻播放質量。為此，我們需要再次壓縮音頻信號。藍牙音頻壓縮的流行編解碼器是SBC，APTX和LE，下面是它們的區別。

它們為接收器提供了不同的音頻質量恢復能力，以及如何傳輸音頻數據。如果您將藍牙音頻編解碼器與電線材料進行比較，藍牙編解碼器的更新版本可以更快地傳輸音頻數據，這意味著更好的音頻質量。藍牙4.2 APTX HD被認為是高品質和高分辨率的產品，您可以從音頻頻譜的上方看到。它幾乎與源音頻相同，這意味著藍牙5.0音頻質量幾乎與信號源是無法區分的。 OPSIS II使用最新的Bluetooth 5.2技術來確保音頻無損音頻傳輸。此外，OPSIS II允許您以低延遲將兩個以上的揚聲器同步在一起，這意味著您可以在最佳360音頻體驗不同配置中無限制使用OPSIS II。 OPSIS II的藍牙不需要外部連接，只需將您的OPSIS II之一變成主機，即可在任何地方連接任意數量的OPSIS II。

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