23. A method of processing a mixed-media data stream, comprising: reading a mixed-media data stream comprising a text component and a digitized speech component, the text component comprising text segments identified in the mixed-media data stream as doubtful and the digitized speech component comprising digitized speech corresponding to the text segments identified as doubtful; converting the text not identified as doubtful to synthetic speech; and generating an audio waveform from the mixed-media data stream by combining the digitized speech and the synthetic speech.
23. A method of processing a mixed-media data stream, comprising: reading a mixed-media data stream comprising a text component and a digitized speech component, the text component comprising text segments identified in the mixed-media data stream as doubtful and the digitized speech component comprising digitized speech corresponding to the text segments identified as doubtful; converting the text not identified as doubtful to synthetic speech; and generating an audio waveform from the mixed-media data stream by combining the digitized speech and the synthetic speech. 25. The method of claim 23, further comprising: speaking the audio waveform.