DA14585 Voice RCU_ADPCM

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Mon, 2018-03-05 07:32

JerryEngineer

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Last seen:8 months 2 days ago

加入:2017-09-28 03:19

DA14585 Voice RCU_ADPCM

Hi Dialog:

I am looking at DA14585 Voice RCU Development Kit software,and I have a issue about ADPCM.
A standard ADPCM file have index data，predictedSample and ecode data,But I only see send ecode data to the host device in the firmware.
根据我的能听懂anding,The host device need index data and predictedSample when it want to decode ADPCM file.

Regards,

Jerry

Device:

DA14580

Mon, 2018-03-05 16:41

MT_dialog

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Last seen:2 months 4 weeks ago

加入:2015-06-08 11:34

Hi Jerry,

Well, when a streaming transaction starts between the host and the peripheral the index and the predicted sample are all re-initialized and set to zero in order for the encoder and decoder of the devices to be in sync, so they start from the same point, so there is no need to send those extra values, this is done for the simplycity of the system.

Thanks MT_dialog