Re: iOS Bluetooth HFP speech codec bandwidth
Re: iOS Bluetooth HFP speech codec bandwidth
- Subject: Re: iOS Bluetooth HFP speech codec bandwidth
- From: Woo-Suk Lee <email@hidden>
- Date: Thu, 01 Nov 2018 13:08:35 +0900
What I mentioned is the generic voice call, not a voip application.
It’s just support 8KHz Narrow Band Speech over Bluetooth, even with Apple
airPod.
> On 1 Nov 2018, at 12:31 PM, yinweixu <email@hidden> wrote:
>
> [AVAudioSession.sharedInstance
> setCategory:AVAudioSessionCategoryPlayAndRecord
> withOptions:AVAudioSessionCategoryOptionMixWithOthers |
> AVAudioSessionCategoryOptionAllowBluetooth error:nil];
> [AVAudioSession.sharedInstance setMode:AVAudioSessionModeDefault error:nil];
> [AVAudioSession.sharedInstance setActive:YES error:nil];
>
>
> ------------------ Original ------------------
> From: "Woo-Suk Lee";
> Date: 2018年11月1日(星期四) 中午11:07
> To: "bluetooth-dev";
> Subject: Re: iOS Bluetooth HFP speech codec bandwidth
>
> Hello,
>
> It seems that the latest iOS doesn’t support wide band speech codec over
> Bluetooth HFP.
>
> As I tested airPod and other Bluetooth headset supporting HFP1.6 wide band
> speech codec with the test setup below,
>
> airPod or BT receiver —> iOS —> voice call —> Android (Galaxy S8) —> Voice
> call recording
>
> It just shows the narrow band speech, which has signals over 20~3KHz only.
>
>
> And the two test setup below show the same result with the full 7KHz
> bandwidth.
>
> iPhone built-in mic —> iOS —> voice call —> Android (Galaxy S8) —> Voice call
> recording
>
> BT receiver —> Android(Galaxy S8) —> voice call —> Android (Galaxy S8) —>
> Voice call recording
>
>
>
> It seems the current iOS doesn’t support Wideband Voice Codec over Bluetooth
> HFP.
> Anyone exeriencing the same issue?
>
> Thanks!
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