A2DP theoretical analysis

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I. Overview

A2DP (advance audio distribution profile), which is responsible for the Profile Bluetooth audio transmission, defined in the ACL channel, for achieving high-quality mono or stereo audio protocol, process the data.
Use in conjunction with A2DP and AVRCP.

Two, A2DP

2.1 Role

2.1.1、SRC（source）

src denotes a source terminal of the digital audio streams

2.1.2、SNK（sink）

sink showing a receiving end of a digital audio stream,

三、AVRCP（audio/video remote controll profile）

Represents AVRCP Audio / Video Remote Control Profile, which defines two roles, CT and TG
CT (Controller) denotes a controller, the target may initiate a transaction by initiating the command, the actual scene, or the controller is usually person pc mobile phone, but also the entire client Bluetooth.
TG (target) represented by the terminal in response to the controller device, in a practical scenario, typically Bluetooth headset, Bluetooth players.

四、AVDTP（audio/video digital transmit profile）

AVDTP represents binary data stream traffic transmission A2DP, which is the basic transmission protocol A2DP. Located above the L2CAP.