android bluetooth

Who can explain in detail sco connect a Bluetooth module, I only know a synchronous voice transmission main from these properties, ask about the transmission of voice in the end is how to achieve.
Also, if you want to achieve their own without going through the system should be how to do.<-! Main posts under Banner (D4) -><-! Posts under the main text (D5) ->
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Came to nothing, ah, their top.
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sco is not directly connected to the voice, and the transmission is a2dp protocol, specifically how else I do not know
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reference to the second floor jgszhuzhu reply:

sco is not directly connected to the voice, and the transmission is a2dp protocol, specifically how else I do not know

sco connection is used to transmit voice does not do, such as phone calls. What did he do specific protocol format
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This is because most of the phone's Bluetooth chip audio solution after completion can be sent directly to the baseband and audio codec, completed by the baseband communication part is done directly by the audio codec and communication, no android part of the audio portion of the Bluetooth chip for processing.
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references, 4th Floor banggeng reply:

This is because most of the phone's Bluetooth chip audio solution after completion can be sent directly to the baseband and audio codec, the baseband complete communication part, by the audio codec and the communication is done directly, without the Bluetooth chip android portion for processing the audio portion.

When android device with a Bluetooth device hsp sco connection, route audio to Bluetooth to play sound. How to connect a Bluetooth device, it does not want to start using the system. . . soc her.
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references, 5th Floor maclay reply:

Quote: references to the 4th floor banggeng reply:

This is because most of the phone's Bluetooth chip audio solution after completion can be sent directly to the baseband and audio codec, completed by the baseband communication part is done directly by the audio codec and communication, no android part of the audio portion of the Bluetooth chip for processing.

When android device with a Bluetooth device hsp sco connection, route audio to Bluetooth to play sound. How to connect a Bluetooth device, it does not want to start using the system. . . soc her.

I should be the wrong expression, not the android is not treatment, but does not require this level of over-bluez plugin processing, android still have to complete the route of some audio functions, which is often seen using the android phones alsa asound.conf content varied reasons; I do not know if you are a device manufacturer for device integration features, or the use of common equipment on the market for application development, device integration if it is, you can re-add some plugin in bluez, the plug-in is not enough bluez There is a strong early bt-sco open source project to be designed as a bluetooth audio driver, be clever idea, but now because of bluez the plugin has been integrated, so that the project is no longer maintained; If generic device application development, may trouble larger.
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General equipment, the boss said to pause before this, and now began, the first big ah. A little bit of thinking all wood ah.
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My project is connected to the PCM codec and Bluetooth, the phone has a voice, but all the noise, this is how it happened?