[MTCB Android Head Units General] m00n61:
I have one of these and the BT board is worth mentioning.

My unit is a 10 inch KLYDE MTCC unit for Suzuki Vitara but I saw several models including this board.

These units have a Parrot FC6000TN daughterboard that has two MAJOR improvements over generic boards.

1. Call quality is very good, even with the unit's mocrophone. No longer hisses and voice breaking.

2. Voice command. I have no idea how it is implemented but if you have one of these boards you will have an extra microphone icon on your home screen. The current implementation only accepts 2 commands, CALL and DIAL but it works amazing. As good as OK Google only ten times faster :) You can see a demo in this video

It's definitely worth a look since this board can do so much more. I found a specs file that says:

The FC6000T is a feature-rich Bluetooth platform dedicated for the integration of Bluetooth in car audios, car telematics systems or any systems requiring a complete embedded multimedia solution.

FC6000T features are:

• Bluetooth connectivity

 Bluetooth Power Class 2 Radio

 Embedded Bluetooth .1, v1.2, v2.0+EDR, v2.1+EDR & v3.0 compliant

 Bluetooth v4.0 : future implementation

 Embedded profiles

 Compatible with most of Bluetooth phones

 Pairing and connection with all Bluetooth Devices: Phones, Smartphones, PDA …

 Multiple users support: Up to 10 paired phones depending on Flash memory size.

 Multiple connections (up to 3 device connected at the same time)

 Multiple profiles

• Phone

 Pick-up, Hang-up, Redial

 Automatic answer (from host via pickup command)

 Send DTMF during calls

 Private Mode

 3-way calling

 Double HFP

Phone Book

 Automatic Phone book synchronization over Bluetooth (up to 5000 contacts; depending on the Flash memory size)

 Call history (dialed number, received calls, missed calls)

 All Synchronization Methods

 Full Unicode for compatibility with numerous characters sets (European, Russian, Chinese, Japanese…)

• Digital Signal Processing

 Microphone(s): the module can manage two configurations:

 Single microphone

 Two microphones with AMS (Automatic Microphone Selection): 1 for the driver and 1 for the front seat passenger. The best microphone is automatically selected during the call.

 Noise Reduction (NR)

 Maximal NR is 25dB.

 Typical NR is 15dB.

 No musical noise

 No fluctuation of the residual noise level

 Automatic adaptation of the Noise Reduction to the Signal-to-noise ratio (SNR) to keep the best voice quality in idle and remove more noise in noisy conditions.

Acoustic Echo Cancellation (AEC)

 The level of echo attenuation, called ERLE is 45dB (measured according to the VDA process).

 Comfort Noise feature so that the background noise is adjusted after AEC algorithm, in order to keep it constant for enhanced communication experience.

 Possibility to accept up to 100ms of delay in the speaker path for digital amplifiers.

 Full duplex

 Automatic Level Control (ALC)

 Different phones can have different Speaker volumes (up to 20dB of difference). It adapts the signal level received from the phone to the target level, quickly and precisely.

 Equalizer

 9 bands equalizer for microphones and speaker paths.

 Tuning

 Car independent tuning if the microphone position and specifications are the same.

 Possibility to tune all parameters of the audio algorithms according to Customer preferences.

 Wideband

 All algorithms work @ 16 kHz.

Audio Streaming

 Embedded SBC decoder

 Embedded MP3 decoder from Thomson Licensing (optional)

 Stereo audio output

• Speaker Independent Voice Recognition (Optional)