1. A method of controlling play of an audio signal comprising: receiving a closed caption signal; identifying a specified text in the closed caption signal; obtaining a comparative form of the specified text, the comparative form generated based on a phonetic representation of each sound category in the specified text, the phonetic representation characterized by time and energy; obtaining a comparative form of the audio signal associated with the closed caption signal, the comparative form of the audio signal including a series of vectors of energy involving a total energy of a speech slice and an energy of one or more frequency bands of the speech slice; and controlling playback of at least a portion of the audio signal corresponding to the specified text when a comparison of the energy of the comparative form of the specified text with the energy of the comparative form of the audio signal indicates a match between the audio signal and the specified text.
1. A method of controlling play of an audio signal comprising: receiving a closed caption signal; identifying a specified text in the closed caption signal; obtaining a comparative form of the specified text, the comparative form generated based on a phonetic representation of each sound category in the specified text, the phonetic representation characterized by time and energy; obtaining a comparative form of the audio signal associated with the closed caption signal, the comparative form of the audio signal including a series of vectors of energy involving a total energy of a speech slice and an energy of one or more frequency bands of the speech slice; and controlling playback of at least a portion of the audio signal corresponding to the specified text when a comparison of the energy of the comparative form of the specified text with the energy of the comparative form of the audio signal indicates a match between the audio signal and the specified text. 15. The method of claim 1 wherein the operation of analyzing an audio signal as a function of the identification of the specified text from the closed caption signal comprises applying a dynamic time.