Jaybird180
03-26-2008, 03:29 PM
Where can I find info about integrating this capability into the car?
What is A2DP?
Advanced Audio Distribution Profile (A2DP)
This profile defines how high quality audio (stereo (http://en.wikipedia.org/wiki/Stereo) or mono (http://en.wikipedia.org/wiki/Mono)) can be streamed from one device to another over a Bluetooth (http://en.wikipedia.org/wiki/Bluetooth) connection.[1] (http://en.wikipedia.org/wiki/A2DP#cite_note-0) For example, music streamed from a mobile phone (http://en.wikipedia.org/wiki/Mobile_phone) to a wireless headset (http://en.wikipedia.org/wiki/Headphones).
A2DP was initially used in conjunction with an intermediate Bluetooth transceiver that connects to a standard output audio jack, encodes the incoming audio to a Bluetooth-friendly format, and sends the signal wirelessly to Bluetooth headphones that decode and play the audio. However, many Bluetooth 1.1, 1.2 mobile phones (http://en.wikipedia.org/wiki/Mobile_phones) and portable media players (http://en.wikipedia.org/wiki/Portable_media_player) do not natively support A2DP, while some newer Bluetooth 2.0 headphones do support it.
Bluetooth headphones, especially the more advanced models, often come with a microphone and support for the Headset (HSP) (http://en.wikipedia.org/wiki/A2DP#Headset_Profile_.28HSP.29), Hands-Free (HFP) (http://en.wikipedia.org/wiki/A2DP#Hands-Free_Profile_.28HFP.29) and Audio/Video Remote Control (AVRCP) (http://en.wikipedia.org/wiki/A2DP#Audio.2FVideo_Remote_Control_Profile_.28AVRCP .29) profiles.
A2DP is designed to transfer a 2-channel stereo audio stream, like music from an MP3 player (http://en.wikipedia.org/wiki/Digital_audio_player), to a headset or car radio.[2] (http://en.wikipedia.org/wiki/A2DP#cite_note-1) This profile relies on AVDTP (http://en.wikipedia.org/w/index.php?title=AVDTP&action=edit&redlink=1) and GAVDP (http://en.wikipedia.org/w/index.php?title=GAVDP&action=edit&redlink=1). It includes mandatory support for the low complexity SBC codec and supports optionally: MPEG-1 (http://en.wikipedia.org/wiki/MPEG-1), MPEG-2 (http://en.wikipedia.org/wiki/MPEG-2), MPEG-4 (http://en.wikipedia.org/wiki/MPEG-4), AAC (http://en.wikipedia.org/wiki/Advanced_Audio_Coding), and ATRAC (http://en.wikipedia.org/wiki/ATRAC), and is extensible to support manufacturer-defined codecs (http://en.wikipedia.org/wiki/Codec). Most bluetooth stacks implement the SCMS-T (http://en.wikipedia.org/wiki/Serial_Copy_Management_System) digital rights management (http://en.wikipedia.org/wiki/Digital_rights_management) (DRM) scheme. In these cases it is not possible to connect the A2DP headphones for high quality audio.
(from Wikipedia)
What is A2DP?
Advanced Audio Distribution Profile (A2DP)
This profile defines how high quality audio (stereo (http://en.wikipedia.org/wiki/Stereo) or mono (http://en.wikipedia.org/wiki/Mono)) can be streamed from one device to another over a Bluetooth (http://en.wikipedia.org/wiki/Bluetooth) connection.[1] (http://en.wikipedia.org/wiki/A2DP#cite_note-0) For example, music streamed from a mobile phone (http://en.wikipedia.org/wiki/Mobile_phone) to a wireless headset (http://en.wikipedia.org/wiki/Headphones).
A2DP was initially used in conjunction with an intermediate Bluetooth transceiver that connects to a standard output audio jack, encodes the incoming audio to a Bluetooth-friendly format, and sends the signal wirelessly to Bluetooth headphones that decode and play the audio. However, many Bluetooth 1.1, 1.2 mobile phones (http://en.wikipedia.org/wiki/Mobile_phones) and portable media players (http://en.wikipedia.org/wiki/Portable_media_player) do not natively support A2DP, while some newer Bluetooth 2.0 headphones do support it.
Bluetooth headphones, especially the more advanced models, often come with a microphone and support for the Headset (HSP) (http://en.wikipedia.org/wiki/A2DP#Headset_Profile_.28HSP.29), Hands-Free (HFP) (http://en.wikipedia.org/wiki/A2DP#Hands-Free_Profile_.28HFP.29) and Audio/Video Remote Control (AVRCP) (http://en.wikipedia.org/wiki/A2DP#Audio.2FVideo_Remote_Control_Profile_.28AVRCP .29) profiles.
A2DP is designed to transfer a 2-channel stereo audio stream, like music from an MP3 player (http://en.wikipedia.org/wiki/Digital_audio_player), to a headset or car radio.[2] (http://en.wikipedia.org/wiki/A2DP#cite_note-1) This profile relies on AVDTP (http://en.wikipedia.org/w/index.php?title=AVDTP&action=edit&redlink=1) and GAVDP (http://en.wikipedia.org/w/index.php?title=GAVDP&action=edit&redlink=1). It includes mandatory support for the low complexity SBC codec and supports optionally: MPEG-1 (http://en.wikipedia.org/wiki/MPEG-1), MPEG-2 (http://en.wikipedia.org/wiki/MPEG-2), MPEG-4 (http://en.wikipedia.org/wiki/MPEG-4), AAC (http://en.wikipedia.org/wiki/Advanced_Audio_Coding), and ATRAC (http://en.wikipedia.org/wiki/ATRAC), and is extensible to support manufacturer-defined codecs (http://en.wikipedia.org/wiki/Codec). Most bluetooth stacks implement the SCMS-T (http://en.wikipedia.org/wiki/Serial_Copy_Management_System) digital rights management (http://en.wikipedia.org/wiki/Digital_rights_management) (DRM) scheme. In these cases it is not possible to connect the A2DP headphones for high quality audio.
(from Wikipedia)