2016年2月1日 星期一

WiSA無線音響規範

http://www.wisaassociation.org/
規格?
  • 24-bit uncompressed audio for true audiophile sound – HD quality, perceptibly 50% better than CD audio
  • Sample rate that matches the content: 32, 44.1, 48, and 96k samples/second
  • Rapid error detection and recovery for uninterrupted listening enjoyment
  • 5 ms fixed latency – perfect lip synch and immediate game response
  • ± 1 µs speaker-to-speaker delay – theatre quality surround experience
  • Amplifiers and speakers matched and balanced as a unit – same quality sound in all directions

重點在5m延遲,喇叭之間只差1us!這麼猛!
這個高段喔~



使用5.2~5.8 GHz頻段,同802.11a,說可以傳送到7.1聲道HD等級,
若是24bits/96K,那就會是8 x 24 x 96 = 18Mbps,差不啦,應該可以。

這裡提到測量距離的方式很有趣 http://www.wisaassociation.org/Compliance/System-Set-up.aspx
用超音波!

這規範,不抽頭,求普及。

Whitepaper提到必須在10mx10範圍內測試,嗯...說真的...太小了...
設定系統當然是用手機App或機器本身的電視輸出,校正說要花20分鐘,不算短哪...不知會跑啥...
就這樣,沒了...

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