Voice output, function - GF82.85-P-3001RMU

MODEL 230.4 as of 1.7.04 with CODE (494) USA version

The navigation of the navigation system (based on DVD data basis) is basically supported by voice outputs:

Direction information
Name of the street into which the driver is to turn

The voice data is originally stored on the navigation digital versatile disk (DVD) as individual word segments. This data record is automatically transmitted from the DVD into the navigation processor (N41/1) and stored there.

The COMAND operating, display and control unit (A40/3) supports following languages:

German
American English
French
Spanish
Italian
Dutch

Several driving recommendations in quick succession are combined into a single voice output.

The data for voice output are then transmitted from the DVD to the navigation processor (N41/1) and stored there. The navigation processor (N41/1) links these word segments to complete instructions or information and generates the corresponding low frequency (NF) signals. The low frequency signals generated in this way are relayed as necessary via the audio gateway control unit (N93/1) to the sound amplifier (A2/13), amplified there and then output via the vehicle speakers. These can be selected using the "System settings" menu.

Loading a language takes a few seconds and changes both the voice output as well as the menu texts on the display of the COMAND operating, display and control unit (A40/3).

Voice loading takes place again automatically after a power disconnection.

While a language is being loaded by the DVD, severe vibrations (e.g. bad road conditions) should be avoided. Otherwise the voice output might be broken up. In such cases it is necessary to reload the language.

Superimposition of voice output and an audio source.

When voice output is active simultaneously with an audio source (e.g. CD, radio), the two signal sources are superimposed.

Volume of voice output

The voice output volume can be adjusted during voice output. A definable difference (can be modified in "Settings" menu) is maintained between the volume of the current audio source and the voice output volume.

Example for voice output

The volume is turned down during voice output. If the set volume difference to the audio signal is undershot, the COMAND operating, display and control unit (A40/3) reduces the audio signal level until the set volume difference is achieved again. After the voice output, the volume of the audio signal is raised again to the level preceding the voice output. In addition, the volume of the voice output cannot be regulated below a certain minimum level.

Voice output mute circuit

The navigation voice output can be muted during voice output by pressing the mute button (button marked with struck-out speaker). The mute feature applies only for the current voice output. If an audio source (e.g. CD, radio) is active at the same time as a navigation voice output, the 1st press of the mute button mutes the navigation voice output and the 2nd press mutes all audio output.

Operating, display and control unit, location/ task/design/function

GF82.85-P-3114RMU