System Operation

GLOBAL POSITIONING SYSTEM

The navigation system receives GPS information via the GPS antenna incorporated in the roof pod. The GPS signals are used by the navigation system to calculate the vehicle's position. Once the driver has input a desired destination, the navigation system can calculate a route, based on the driver's pre-determined preferences or the default settings in the navigation system.

The navigation system is accessed from the TSD (Touch Screen Display) home menu.

Navigation is initiated by the driver inputting a destination. This can be achieved by:

• Entering an address using the TSD
• Entering a post code
• Choosing a previous destination
• Choosing a point of interest from the map disc database
• Choosing the home location
• Choosing a memory stored location

The driver is then guided to the destination by a scrolling map display and voice guidance. The display can be varied by scale and display type.

Selection of 'Navigation' on the TSD home menu and subsequent sub-menu selection sends a control request signal to the navigation computer on the MOST (Media Oriented System Transport) ring Rest of World/Japan only. The requested control information is processed by the IAM (Integrated Audio Module) for ROW; or the dedicated navigation computer for Japan and Asia.

• On ROW vehicles, if voice guidance is operational, the voice signals are passed from the IAM to the audio amplifier on the MOST ring for output on the speaker system.
• On Japan vehicles, if voice guidance is operational, the voice signal information is relayed from the navigation computer on the MOST to the audio amplifier for output on the speaker system.

The navigation audio output is through the front speakers while the background audio, for example radio or CD (compact disc), is played at a reduced volume on the rear speakers. On Asia vehicles the radio or CD output is muted while the navigation audio output is transmitted.

The GPS signal is available to the navigation system at all times when the vehicle ignition is switched on.

Navigation voice commands are made using the voice recognition system. The TSD processes the analogue signal from the voice recognition switch. This is passed from the TSD onto the MOST system to the voice recognition control software which is integral with the IAM (ROW) or navigation computer (Japan). Voice control of the navigation system is not available on Asia specification vehicles.

The TSD sends an instruction via the MOST ring to the IAM to turn on the microphone facility. The microphone is hardwired to the IAM. For the ROW system, spoken voice commands are processed by the IAM. The processed commands are then sent to the TSD to determine which control signals need to be sent to the navigation system.

For the Japan system, the analogue voice signals are relayed from the IAM via the MOST ring directly to the navigation computer (for processing). Navigation commands are handled internally within the navigation computer without the need for communicating with the TSD for control.

Traffic data from the TMC (Traffic Messaging Channel) or the VICS (Vehicle Information and Communication System) is processed by the IAM or navigation computer, distributed to the TSD with any supporting voice instruction relayed through the MOST ring to either the IAM or power amplifier, dependant on equipment level, for output on the speaker system.

TRAFFIC MESSAGE CHANNEL

TMC is a function of the FMRDS (radio data system). The system broadcasts real-time traffic and weather information. Data messages are received and decoded by the IAM integral receiver. The IAM processes the received information and alerts the driver of a problem on the planned route and calculates an alternative route to avoid the incident. All TMC events on the map can be viewed not just the ones on the calculated route.

TMC traffic information systems conform to a global standard that has been adopted by traffic data gatherers, information service providers, broadcasters and vehicle/receiver manufacturers.

All TMC receivers use the same list of event codes, while the location database (on the IAM hard drive) contains both a country-specific set of location codes for the strategic European road network.

TMC traffic data is currently broadcast in many European countries and the USA.

Each traffic incident is sent as a TMC message. One message consists of an event code and a location code in addition to time details. The message is coded and can be translated by the IAM into the market language. Location code tables assign numbers to locations on the road network. These location tables are integrated in the maps stored on the IAM hard disk drive. The source of traffic information is typically police, traffic cameras and local network stations.

The TMC system uses the existing FM antenna and audio system antenna amplifiers to pass the signals to the IAM.

For additional information, refer to: ANTENNA -- RANGE ROVER SPORT/L320 .

VEHICLE INFORMATION AND COMMUNICATION SYSTEM

The VICS (Vehicle Information and Communication System) is broadcast only in the Japanese market and is similar to the TMC used outside of Japan. VICS gives countrywide coverage and broadcasts of real-time traffic and weather information.

The VICS supplies information to enable the navigation computer to re-route the navigation guidance or to inform the vehicle driver of traffic conditions in the vehicles vicinity.

Information is provided to the system through three methods:

• RF (radio frequency) microwave transmission
• Infra-red transmission
• FM multiplex transmissions.

In certain areas the information is transmitted using an Infra-Red signal or alternately a RF (Radio Frequency) microwave signal, both of which are received by the VICS beacon antenna. Additional information is transmitted on the FM wavelength and is received by the FM antenna. The received FM signal is passed to the navigation computer via an RF (radio frequency) antenna amplifier.

The RF transmissions are generally transmitted from road side beacons mainly on expressways. The information transmitted is as follows:

• Traffic congestion
• Travel time to next intersection
• Traffic conditions in surrounding areas and expressway turn offs
• Traffic accidents
• Speed limits
• Lane regulations
• Tire change
• Parking availability at expressway service areas and parking areas.

Infra-Red transmissions are transmitted from road side beacons on major trunk roads. The information transmitted is:

• Traffic congestion and travel time
• Traffic accidents
• Breakdowns
• Road works restrictions
• Parking availability.

FM transmissions are broadcast as part of the FM multiplex broadcasting system from NHK (Japanese Broadcasting Corporation) FM stations. Information transmitted is:

• Traffic congestion and travel time for wide areas
• Traffic accidents, road works, speed limits and lane restrictions for a wide area.

The traffic data is split from the normal FM transmissions by the diversity antenna module.

VOICE CONTROL

The voice system provides the driver with the option of voice control for a range of supported functions. In addition to the navigation system, the system also supports the following:

• phone system
• notepad functions
• radio
• satellite radio
• Digital Audio Broadcasting (DAB)
• single CD
• CD autochanger
• USB and auxiliary connection functions.

The voice system adopts a concept known as 'Say What You See' (not applicable to Japan specification vehicles). Each of the voice functions are supported by 'Help' commands, saying 'Help' at each point in the conversation will give a context sensitive explanation of what the user can do at that point. The voice menu shown in the TSD always guides the user through the flow showing not only examples of what they can say next, but also confirmation of where they are in the conversation flow.

The 'notepad' facility allows voice notes to be recorded. Nametags for radio tuning, phone dialing and navigation locations allow the system to be personalized and there is a help and tutorial function to provide advice on using the system.

Voice control is a key component of the navigation system, allowing hands free control when issuing navigation commands.

The system is controlled by the voice button on the steering wheel. Voice commands are picked up by a dedicated microphone. When giving a voice command, audible feedback will be heard through the vehicle's audio speakers.

Voice Control Button

ITEM	DESCRIPTION
1	Voice control button - push to talk

Efficient operation of voice control is reliant on the user understanding some of the following basic operating conditions:

• Face forwards, sitting in a normal driving position.
• After pressing the voice button, always wait for the end of the tone before speaking.
• Speak naturally, as if you were talking to a passenger or on the phone without pausing between words.
• When the system asks for more information, always wait for the end of the tone before responding.
• Always say numbers correctly.
• Excessive noise, for example while driving with windows open, may cause voice command mis-recognition. For example if it is too noisy to use the phone, it is likely that voice commands will not be recognized.

Most accents are understood without difficulty, but if the system does not recognize the command it will respond "SORRY" and allow two more attempts to say the command.

Voice feedback is given in the same language as the command recognition. It is possible to change the language of the speech control system.

Voice control is mainly a software based system. The software responsible for controlling the voice system is resident in the following control modules:

• Integrated Audio Module (IAM) (All markets except Japan)
• Navigation computer (Japan markets only)
• Touch Screen Display (TSD).

Some of these modules contain more than one software component. Voice control communication between these modules takes place via the MOST network. A voice control microphone is located in the front overhead console and is hardwired to the IAM.

When the push to talk button is pressed on the steering wheel, a voltage is received at the TSD via the clockspring assembly. This voltage is sent on a single wire from the button, through a resistive ladder. The whole process is then initiated via the MOST network, for example the TSD starts the voice session and carries out the resulting action requested by the user, but the IAM maintains the dialogue with the user. The accompanying voice instruction is sent to the audio amplifier for broadcast over the speakers from the IAM. If a recognized user instruction is received via the microphone, this is then processed by the IAM and sent to the TSD to perform the required action.

VOICE TAGS

Voice tags allow the user to store voice entries as shortcuts to control various functions, for example routing to navigation locations, dialing numbers and tuning to radio stations. The voice tags sub-menu accesses controls for navigation, phone, radio and depending on specification DAB radio or SDARS.

For additional information, refer to: SYSTEM OPERATION AND COMPONENT DESCRIPTION .

VOICE TRAINING

The voice system allows two different users to create separate profiles, providing training for a User 1 and User 2. Voice training is used to help the system recognize the user's voice more accurately, and when training is activated for each user, a pop-up is displayed to confirm that training is in process for that user. The pop-up informs the user that voice training must be fully completed in order to activate the new voice profile, and offers the option of 'OK' to initiate the session and store data in that User profile, or 'Cancel' to return to the previous menu. Voice training phrases will be shown in the TSD Menu and the user will be requested to say each phrase after the listening tone.

Voice tags and training are stored in a non-volatile memory within the IAM. Disconnection of the battery would not cause any customer data loss.

NAVIGATION DESTINATION ENTRY BY VOICE

Destination entry uses phonetic transcriptions of the navigation data (stored as part of the map data) to offer the user the ability to enter an address or postcode into the Navigation system by voice. The user simply follows the visual and audible instructions given by the voice system and enters their desired address in a step-by-step manner (e.g. city, then street, then house number). At each address entry stage, the user's voice command is matched against the phonetic map data and a list of likely recognition candidates is presented in a "picklist" for the user to select from. If the chosen address has more than one location associated with it, the voice system will work with the user to determine the exact address they wish to navigate to.

DIALING FROM THE G2P PHONEBOOK

Provided the phonebook has been downloaded via Bluetooth, the voice system is able to perform a grapheme-to-phoneme (G2P) transcription of each of the names stored in the phonebook. This is then used by the voice system to allow the user to dial a contact by saying the name stored in the phonebook, there is no need to store a voice tag first. The user's voice command is matched against the phonebook entries and a list of likely recognition candidates is presented in a "picklist" for the user to select from. If the chosen contact has more than one number associated with it, the voice system will work with the user to determine the exact number they wish to dial.