1. A method of creating an audio-centric audio-visual summary of a video program, said video program having an audio track and an image track, said method comprising: selecting a length of time L sum of said audio-visual summary; examining said audio track and image track; identifying one or more audio segments from said audio track based on one or more predetermined audio, image, speech, and text characteristics which relate to desired content of said audio-visual summary, wherein said identifying is performed in accordance with a machine learning method which relies on previously-generated experience-based learning data to provide, for each of said audio segments in said video program, a probability that a given audio segment is suitable for inclusion in said audio-visual summary; adding said audio segments to said audio-visual summary; performing said identifying and adding in descending order of said probability until the length of time L sum is reached; and selecting only one or more image segments corresponding to the one or more identified audio segments, so as to yield a high degree of synchronization between said one or more audio segments and said one or more image segments.