9. A computing system comprising: at least one processor; and memory storing instructions executable by the at least one processor, wherein the instructions, when executed, configure the computing system to provide: a speech recognizer configured to perform speech recognition, on an audio portion of a video signal, to generate a transcription of the audio portion; a recognized content analysis component configured to analyze the transcription of the audio portion and identify a keyword included in the transcription; a supplemental content selection component configured to select a supplemental content item from a collection of supplemental content items based on the keyword included in the transcription; and a display component configured to simultaneously display video, corresponding to the video signal, and text corresponding to the transcription, the displayed text including the keyword included in the transcription and at least one hyperlink that links the keyword to the selected supplemental content item.
9. A computing system comprising: at least one processor; and memory storing instructions executable by the at least one processor, wherein the instructions, when executed, configure the computing system to provide: a speech recognizer configured to perform speech recognition, on an audio portion of a video signal, to generate a transcription of the audio portion; a recognized content analysis component configured to analyze the transcription of the audio portion and identify a keyword included in the transcription; a supplemental content selection component configured to select a supplemental content item from a collection of supplemental content items based on the keyword included in the transcription; and a display component configured to simultaneously display video, corresponding to the video signal, and text corresponding to the transcription, the displayed text including the keyword included in the transcription and at least one hyperlink that links the keyword to the selected supplemental content item. 12. The computing system of claim 9 , wherein when the supplemental content selection component selects the supplemental content item from the collection of supplemental content items it does so as a function of a value of a word in the transcription identified as being the keyword.