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Can someone please help in getting the difference between HFP 1.6 and HFP 1.5 ? Any link or available document?
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HSP (Handset Profile) – provides the basic functionalities needed for communication between a handset (cell phone) and a headset. 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.
Hands-Free Profile. The Bluetooth Hands-Free Profile (HFP) allows the vehicle to make and receive phone calls via a connected remote device.
The Hands-Free Profile (HFP) specification defines a set of functions such that a Mobile Phone can be used in conjunction with a Hands-Free device (e.g., installed in the car or represented by a wearable device such as a headset), with a Bluetooth Link providing a wireless means for both remote control of the Mobile ...
Hands-Free Profile (HFP) is used to allow hands-free devices such as carkits and headphones to communicate with mobile phones over a Bluetooth link. Bluetooth HFP AG Test Suite can be used for evaluating Bluetooth HFP implementations, such as phones, for security flaws and robustness problems.
Have a look at the Wikipedia page on Bluetooth profiles:
https://en.wikipedia.org/wiki/Bluetooth_profile
Specifically under the HSP section:
Version 1.6 adds optional support for wide band speech with the mSBC codec, a 16 kHz monaural configuration of the SBC codec mandated by the A2DP profile.
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