CC2564_15 Datasheet, PDF (22/47 Pages) Texas Instruments – Bluetooth® and Dual-Mode Controller

CC256x
SWRS121D – JULY 2012 – REVISED JANUARY 2014
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Figure 3-16. HFP 1.6 Architecture Versus Assisted HFP 1.6 Architecture
For detailed information on the HFP 1.6 profile, see the Hands-Free Profile 1.6 Specification
(www.bluetooth.org/en-us/specification/adopted-specifications).
3.5.4.2 Assisted A2DP
The A2DP enables wireless transmission of high-quality mono or stereo audio between two devices.
A2DP defines two roles:
• A2DP source is the transmitter of the audio stream.
• A2DP sink is the receiver of the audio stream.
A typical use case streams music from a tablet, phone, or PC (the A2DP source) to headphones or
speakers (the A2DP sink). This section describes the architecture of these roles and compares them with
the corresponding assisted-A2DP architecture. To use the air bandwidth efficiently, the audio data must be
compressed in a proper format. The A2DP mandates support of the SBC scheme. Other audio coding
algorithms can be used; however, both Bluetooth devices must support the same coding scheme. SBC is
the only coding scheme spread out in all A2DP Bluetooth devices, and thus the only coding scheme
supported in the assisted A2DP modes. Table 3-7 lists the recommended parameters for the SBC scheme
in the assisted A2DP modes.
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Detailed Description
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