18. The computer system of claim 13 , further comprising removable media for storing the media file including a link to a remote location of the grammar file.
13. A computer system for enhancing a media file to enable speech-recognition of spoken navigation commands, comprising: a processor configured for: receiving a plurality of textual items relating to the subject matter of the media file; generating at least one grammar comprising one or more grammar entries, wherein the one or more grammar entries comprise grammar entries that are generated for at least some of the plurality of the textual items and comprise word or word sequence recognizable by a speech recognition engine; receiving speech input from a user; and recognizing the speech input using the speech recognition engine and the at least one grammar to produce a speech recognition result corresponding at least in part to a recognized grammar entry of the at least one grammar; and a repository for storing: a grammar file including the at least one grammar, wherein one or more time stamps are determined for each of the grammar entries that correspond to content in the media file, and wherein each time stamp indicates a location in the media file of content corresponding to the grammar entry; and a link for locating content in the media file during playback of the media file by identifying one or more locations in the media file by identifying the one or more time stamps determined for the selected recognized grammar entry and the current time position of the media file at playback when the user input is received, wherein upon identifying the location in the media file a media controller navigates to the time stamp identified and presents the media file to the user at the identified timestamp location.