最終更新:2026-07-21 (火) 04:27:04 (23d)  

Bluetooth/オーディオ
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Bluetooth/プロファイル

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A2DP

  • Advanced Audio Distribution Profile
  • 16～48KHz
    SBC127～345kbps
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HFP

  • Hands Free Profile
  • has somewhat extended functionality to HSP and was originally intended to control a cell phone from a stationary, in-car, hands-free unit.
    HFP 1.6mSBC16KHz モノラル
    ～HFP 1.5CVSD8KHz モノラル
  • Audio transmitted over a synchronous SCO channel and a separate data channel used for controlling the audio stream (AT commands)
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HSP

  • Handset Profile
    CVSD 64kbps8KHz モノラル
  • Audio transmitted over a synchronous SCO channel
  • Mostly made obsolete by HFP profile, but still supported by some legacy devices
    2008/12/18HSP 1.2
    2001/02/22HSP 1.1?Bluetooth 1.1
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AVRCP (Audio/Video Remote Control Profile)

  • リモコンの通信
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プロトコル

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AVCTP (Audio/Video Control Transport Protocol)

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AVDTP (Audio/Video Distribution Transport Protocol)

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SCO

  • Synchronous Connection Oriented
  • 音声オーディオはL2CAPなどを経由せず、ベースバンド層とダイレクトにやり取りされる



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