Starting A Voice Session
To start a voice session the driver operates the voice control switch on the left steering wheel switchpack briefly. An audible tone can be heard, followed by the presentation of the 'Say What You See' visual command list in the Touch Screen (TS) indicating some commonly used available commands. A voice symbol indicates that the system is listening. Always wait for the listening tone to finish playing before using the command. To end a session press and hold the voice control switch until a double beep is heard.
When the voice control switch is operated on the left steering wheel switchpack, depending on system specification, a signal is received by the following:
- The Audio Head Unit (AHU) on vehicles with InControl Touch audio system.
- The Infotainment Master Controller (IMC) on vehicles with InControl Touch Pro audio system.
The signal is transmitted on a Local Interconnect Network (LIN) bus through the Steering Wheel Module (SWM). A voltage is sent on a single wire from the switchpack, through a resistive ladder and converted to a LIN bus signal.
The whole process is then initiated between the AHU or IMC and the TS via the Automotive Pixel Link 2 (APIX2) connection. For example the TS starts the voice session and performs the resulting action requested by the user, but the AHU or IMC maintains the dialogue with the user. The 'Say What You See' visual prompter is calculated and presented in the TS when requested to do so by the AHU or IMC. The accompanying voice feedback is sent to the Audio Amplifier Module (AAM) for broadcast over the speakers from the AHU or IMC. If a recognized user instruction is received via the microphone, this is then processed and sent to the TS to perform the required action.
The voice system has speaker adaption that continuously adapts to the person speaking. When a new user speaks, the first 4 to 5 recognitions may be inaccurate as the system is adapting to the new user's voice.