User's Manual

DATASHEET FC6000 Confidential Information 47/53
d. Audio Streaming and Handsfree working together
Audio Streaming from phone to Module (remotely controlled by the Module)
A2DP source
A2DP Sink
Mobile Phone or
Music Player
MP3 or SBC (A2DP & AVRC)
44 kHz stereo
Streaming
Control
Audio unit
FC6000
AVHFP Feature
Most phones now support both HFP and A2DP Source/AVRCP TG. The most difficult case is
to correctly handle the AVHFP Feature (dual use of A2DP/AVRCP and HFP).
As there is no specification release by the Bluetooth SIG explaining how this multi-profile use
case should operate, a whitepaper has been issued by the A/V Working Group
(“Simultaneous Use of HFP, A2DP, And AVRCP Profiles”).
Basically, the Whitepaper states that the phone should handle the streaming restart
management once the call is finished (this is the main concern today):
- Incoming call: the AG should handle the streaming management:
o Pause the streaming on incoming call.
o Send to the HF the indicators (CIEV Call setup)
o Then the HF picks up the call with ATA, communication/SCO is established
o Once finished (from AG or HF), the AG should restart streaming from where it
has been paused.
- Outgoing call from HF (ATD): the AG should also handle this in the same manner.
Nevertheless, most phones do not correctly implement the Whitepaper, and the streaming
does not always restart after the call. Parrot has developed a strategy that automatically
relaunches streaming in this case.
Song information availability
According to the AVRCP version supported by the music player (can be a phone or a
Bluetooth Music player), the Host is updated with the following information in order to update
its HMI.
AVRCP TG 1.0 (Category 1 – Music Players):
- Mandatory commands:
o Play and stop.
- Optional Features:
o Enhanced control: Next, Previous, Pause, FF, FW (most of the
phones/Players supporting AVRCP1.0 support those commands).