Navigation, function - GF82.61-P-2003M
MODELS 215.3, 220.0 /1 as of 1.9.03 with CODE (813) Voice control system (VCS)
Function
The navigation control menu is activated with the "navigation" command. Following this the VCS (voice control system) is responsible for the navigation commands. One complete destination can be entered via voice input. Depending on size, place names can be spoken directly, or spelled out at any given 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 letters and a list on the navigation CD) is described in the following. While the letters are being entered, the navigation system prepares the matching process. 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 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 options.
The programs and data for matching and the structure of the matching list are provided by the navigation manufacturer. 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 COMAND operating, display and control unit (A40/3) has to be in navigation mode 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 2 entry options; either a complete address can be entered via voice command, or one part is specified via voice command and the rest in written form.
Entering a city
Following entry of an "Enter place" command in VCS, the vocabulary for entering place names as whole words is activated. 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, Munich, Ulm).
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. The user is presented with a selection of available commands on the display after pressing the VCS switch (S93/2) when in initial user mode. The first line shows the destination (city or street) that was last entered either in written form or via voice command.
Only the names of larger cities can be spoken. Smaller villages and cities can only be entered by spelling them out or in written form.
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 of possible streets that exist in the selected city are represented by the navigation system. If no digitized streets are available, then this is notified to the user by the voice control system.
The system retrieves the current destination data from the navigation system and shows a window with the possible commands. Usually it is sufficient to speak the first 5 to 6 letters of the street name, in order to clearly designate 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
After entering an initial command to enter a destination address, the user is guided by the voice control system through the entire dialog. This command can be used to enter 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 is available for 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.
| Hands-free microphone, location/task | GF82.70-P-4102M | ||
| Hands-free system loudspeaker, location/task | GF82.70-P-4103M |