GF82.61-P-2003T Navigation, Function

GF82.61-P-2003T Navigation, Function
- with CODE (813) Voice control system (VCS)

Function
The navigation control menu is activated with the "navigation" command. Then, the voice control system (VCS) enables the navigation commands. One complete destination can be entered via voice input. The city names can be spoken directly depending on the size, or spelled at any time. Street names, centering points, intersections have to be spelled out. Once the destination has been entered, navigation can be started. An ongoing navigation can be aborted via voice command. No destination can be entered while a navigation process is running

Spelling and matching
To be able to find the most likely match for the spelled words, the so-called matching is necessary.

Matching (comparison of entered letters and an already existing list on the navigation CD) is described in the following. While entering the spelling into the voice control system (VCS), matching is prepared in the navigation system. The preparation mainly consists of building the necessary matching list from the entries on the navigation CD. This build-up can occur directly from the entries on the navigation CD. The voice control system (VCS) transmits the recognition results to the navigation system (approx. 5 alternative sequences of letters, sorted by recognition probability). The recognition result is evaluated or compared to the already created matching list by using the matching algorithm. The result is a list of the most probable alternatives.

The programs and data for matching and the build-up of the matching lists are provided by the particular navigation manufacturers. The matching algorithm is a method that is used to filter the most likely meaning from an existing list out of a sequence of letters that is incorrectly spelled. The results after matching are then shown in the display.
The user can now select a city from this list by speaking the number of the desired location.

Entering an address
The radio control panel and navigation unit (A2/56) or the COMAND operating, display and control unit (A40/3) have to be in the navigation mode in order to be able to enter the address. The address can be entered in several entry steps (entry of the location, entry of the street, intersection, and house number). Next, navigation can be started.

There are two entry options; either a complete address can be entered via voice command, or only one part is specified via voice command and the rest in written form.

Entering a city
After entering the "entering a city" command, the vocabulary for the city name entry is activated as whole words. The size of the vocabulary, in other words the number of cities that can be entered using whole words depends on the VCS destination hardware. These cities can be spoken "naturally" (e.g., Stuttgart, Hildesheim, Ulm, etc.).
The results of the voice recognition are numbered and, sorted by recognition probability, shown on the display. The user can select the desired destination city by speaking the appropriate number. After operating the VCS switch (S93/2), a window is shown on the display to the user in the first user mode, which lists the possible commands.
The first line shows the destination (city of street) that was last entered either in written form or via voice command.

Spelling the city
With this function all city names can be entered in semi-spelling mode. For this purpose it is usually sufficient to say the first 5 to 6 letters of the city name in order to clearly identify it. In doing so, the voice recognition system is activated in order to spell. After entering the first letters, a comparison with the database of the navigation system takes place. The results are shown in the display. If the desired city name appears in the displayed lists, then the desired city can be accepted by using the "accept number X" command.

Entering the street
The street name is entered by using the spelling mode the same way the city name is entered. In doing so, the entire number o possible streets that exist in the selected city are represented by the navigation system. If no digitized streets are available, then this information is provided to the user by the voice control system VCS).

The system retrieves the current destination data from the navigation system and shows a window with the possible commands. It is usually sufficient to say the first 5 to 6 letters of the street name in order to clearly identify it.

Entering a house number or starting navigation
The user can now either start the navigation or, if this is possible for the selected street, also enter a house number. In larger cities the streets are digitized down to the appropriate house numbers. It is now possible to select the desired house number via voice command.
Again, a window shows a list of possible commands. The user can now select the desired entry as usual.

Entering a complete address
The user is guided through the complete dialog by the voice control system (VCS) after entering an initial command for the entry of a destination address. This command can be used to entered an entire destination without any break.

Starting navigation
If a valid destination was entered, then navigation can be started via voice dialog.

Save the navigation destination memory (entered destination)
If a destination was entered into the navigation system in written form or via a voice command, then the current destination can be transferred into the address book by using the "save destination" command. If the spoken sequence number already exists, then the destination is saved there, else a new entry is created in the address book.

Changing the destination area
A DVD exists for the navigation systems on which several countries are digitized. These countries can only be addressed individually, in other words only the destinations of the country that is currently active on the DVD are selected. In order to be able to select a different country on the DVD via voice command, the "change destination area" voice command was introduced.