Audio / Video Distribution Transport Protocol (AVDTP)
AVDTP defines A/V stream negotiation, establishment and transmission procedures.
Usage Scenario
AVDTP
Example Products
Here are a few examples of the types of devices that you might find using the AVDTP:
- PC
- Portable Player
- Video Camera
- TV
- Video monitor
Getting Technical
Operations Between Devices
AVDTP applies point-to-point signaling over a connection-oriented L2CAP channel. TheL2CAP channel is set up in advance, between two devices participating in A/V streamdata distribution. L2CAP channels are best suited for the support of A/V stream datadistribution links. This is because L2CAP channels can be flexibly configured to enablebandwidth to be shared between A/V content streams. A/V streams are transported inpseudo-isochronous L2CAP channels. A/V signaling is also transported via L2CAPchannels. Signaling provides stream discovery, configuration, establishment, andtransfer control. |
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The figure to the left shows how AVDTP, Bluetooth protocol stack, and upper layer integratetogether. AVDTP exposes three interfaces to the upper layer and two interfaces to the Bluetooth protocol stack. In order to retrieve A/V device details the upper layer uses theSDP interface, provided by the Bluetooth protocol stack.
When A/V applications transport audio and/or video streams over Bluetooth links,AVDTP performs A/V parameter negotiation. Based on the result of this negotiation, A/Vapplications transport audio and/or video content.
Need more? View the Audio / Video Distribution Transport Protocol (AVDTP).
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