Abstract: A discrete speech recognition system has a default grammar with keywords and non-keywords. Upon detecting a non-keyword, the speech recognition system performs the function associated with the detected word. Upon detecting a keyword in the default grammar, the speech recognition system temporarily expands its active grammar list from the default grammar to a ballooned grammar that includes both the words in the default grammar and the additional words triggered by detection of the keyword. In this manner, the operator still has the option to select a word from the original grammar, or choose a word from the additional second-tier list. The ballooned grammar remains active until the operator makes a new selection. The speech recognition system then returns to the default grammar.

Abstract: A speech recognition system has an operator interface that helps a user navigate new or changing grammars. The speech recognition system includes an application, a vocabulary that holds a set of utterances applicable to the application, and an active grammar that holds a subset of the utterances in the vocabulary. The active grammar includes a help command as well as other options. The speech recognition system has a speech recognition engine to recognize the utterances in the active grammar, including the help command. When the help command is detected, the operator interface verbally enunciates the utterances in the grammar so that the user can hear the available options in a hands-free, eyes-off operating environment. In this way, any time the user does not know or forgets the available options, he/she simply speaks the help command, such as asking “What can I say.” The system responds verbally with a list of currently available words and/or phrases in the active grammar.

Abstract: An automobile computer system having a computer that runs an open platform operating system configured to support multiple applications, including applications that can be installed by a user. The system includes an operator interface that is mountable for viewing by an operator of an automobile. A plurality of application icons are scrollable across the visual operator interface by a user. The application icons correspond to applications supported by the operating system. The operator interface has a fixed focus position, wherein any application icon that is scrolled to the fixed focus position becomes focused and can be activated to select the application corresponding to the focused application icon. In some cases, icons are activated by leaving them focused for a predetermined timeout period. The system also includes a visual control that is available to application programs.