required in order to ensure interoperability between Bluetooth devices with audio/video
control functions in the Audio/Video distribution scenarios. This profile specifies the
scope of the AV/C Digital Interface Command Set (AV/C command set, defined by the
1394 Trade Association) to be applied, and it realizes simple implementation and easy
operability. This profile adopts the AV/C device model and command format for control
messages, and those messages are transported by the Audio/Video Control Transport
Protocol (AVCTP). Browsing functionality is provided over a second AVCTP channel,
which does not use AV/C
二.架构 and role 架构
role: The controller (CT) is a device that initiates a transaction by sending a command
frame to a target. Examples for CT are a personal computer, a PDA, a mobile
phone, a remote controller or an AV device (such as an in car system, headphone,
player/recorder, timer, tuner, monitor etc.).
The target (TG) is a device that receives a command frame and accordingly
generates a response frame. Examples for TG are an audio player/recorder, a video
player/recorder, a TV, a tuner, an amplifier or a headphone.
三.AVRCP specific commands
四.AVRCP PDU format There are two PDU formats used in AVRCP. On the Control channel all commands and
responses are AV/C generic PDUs or AVRCP Specific AV/C PDUs as defined in
Section 6.3.1. On the Browsing channel all commands and responses are AVRCP
Specific Browsing PDUs as defined in Section 6.3.2. The AVRCP specific commands
are listed in Table 4.5: AVRCP Specific operations. This table specifies whether the
command shall be sent on the Control or Browsing channel, and hence what format the
commands shall take. Control commands shall only be sent on the Control Channel and
Browsing commands shall only be sent on the Browsing channel.
1.AVRCP Specific AV/C PDUs data format
2.AVRCP Specific Browsing Commands data format
例：