Voice support by BLE statck

RE: Voice support by BLE statck

endnode — Fri, 08 Sep 2017 06:13:40 GMT

I'm afraid from BLE point of view it doesn't make sense (to built it some specific privileged profile/use case lower to the stack, that's not how BLE was built).

RE: Voice support by BLE statck

wang — Fri, 08 Sep 2017 02:28:10 GMT

Hi, So appricate for your comments. Yes, it not use case for BLE, I just talk about the possibility of BLE voice, it is not a requirment, just disscuss on technologic. For my personal opinion, it more make sence to do it in controller than, but as you say, it not in BLE spec, most real time talking scenario using the be/edr SCO. Thanks again.

RE: Voice support by BLE statck

endnode — Thu, 07 Sep 2017 10:25:16 GMT

But what you describe is completely NOT use case for BLE! Why you don't go with custom HW+SW on both sides of the link and then you can use custom radio protocol/stack with all these features such as "QoS" and flushing the queue if the throughput is lower then required etc.?

RE: Voice support by BLE statck

wang — Thu, 07 Sep 2017 10:22:36 GMT

Dear Nodic Team, I have see some thoughts on the forum based on nordic board, but mostly they just take ble as a transfer tools, data handle in app layer like this: mic-->PDM-->PCM-->BLE app profile-->host stack-->controller--> air to remote receiver --> get data from air-->past to host layer-->past to app layer-->PCM-->speaker In this have two problem, firstly, data double handle by app and host layer, it is ineffective, secondly, for real time talking, we need make the ble link as SCO, discard some packets if environment is not good, this is controlled in software devices that we can't change it... Do nordic have any solution based on software device change to support this feature, just no plan to support this in software devices and just let the customer change the application to make it. Thanks a lot.

RE: Voice support by BLE statck

endnode — Thu, 07 Sep 2017 07:09:12 GMT

Yes, people managed to transfer audio/sound over BLE link with nRF5x devices so it is possible. However there is no standard profile for audio transfer over BLE by BT SIG (yet) so there is no such example in Nordic SDK. If you search the forum you will see many thoughts and also maybe few examples on this topic, try it.