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This topic provides an outline of requirements for a head unit. The requirements are derived from a real life development project for in-vehicle infotainment platform. ''This is still work in progress--the content will be added gradually.'' | This topic provides an outline of requirements for a head unit. The requirements are derived from a real life development project for in-vehicle infotainment platform. ''This is still work in progress--the content will be added gradually.'' | ||
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# After power-on, the head unit accepts first user input (e.g. HMI menu, screen, volume control) within max. 2 s. | # After power-on, the head unit accepts first user input (e.g. HMI menu, screen, volume control) within max. 2 s. | ||
# After power-on, the head unit displays the Navigation map and starts the route guidance, resuming the previous route, within max. 5 s. | # After power-on, the head unit displays the Navigation map and starts the route guidance, resuming the previous route, within max. 5 s. | ||
| + | # Head unit reacts to user input via HMI (touch screen events, button or switch presses) within max. 100 ms. Head unit displays interim response (e.g. sand glass) for all requests that cannot be completed within this time | ||
| + | # Head unit performs voice recognition for a single word against G2P vocabulary within max. 200 ms measured from the end of utterance (silence detection) to recognition result available (e.g. HMI display update or resulting voice prompt output). | ||
| + | # Head unit performs hand writing recognition against Chinese standard 2000 character set within max. 200 ms measured from end of entry to recognition result available (e.g. HMI display update or resulting voice prompt output). | ||
| + | # Head unit exhibits the refresh rate of min 15 fps for the navigation map in any scaling. | ||
| + | # Head unit exhibits a graphics rendering frame rate (for HMI animations and Navigation maps) of min. 15 fps. | ||
== Audio == | == Audio == | ||
This topic provides an outline of requirements for a head unit. The requirements are derived from a real life development project for in-vehicle infotainment platform. This is still work in progress--the content will be added gradually.
Some of the requirements below will be fulfilled outside of the MeeGo IVI based software. For example, the implementation of CAN network interface and early audio functions most probably falls into this category. The decisions about implementation of specific requirements in MeeGo IVI software will be made assuming a specific system architecture.