7. A non-transitory, machine-readable storage medium, comprising executable instructions that, when executed by a processing system including a processor, facilitate performance of operations, comprising: obtaining video media content, wherein video media content comprises images, audio content, and closed captioning of text from the audio content; obtaining a textual phrase in the closed captioning data as a detected occurrence, wherein the textual phrase is associated with an audio data segment from the audio content of the video media content; computing a phonetic transcription for the detected occurrence as a computed transcription; selecting, from a speech recognition library, identified phonetic transcriptions associated with the textual phrase, wherein the speech recognition library comprises audio pronunciation data for the textual phrase and identified phonetic transcriptions of the textual phrase; calculating a difference metric between the computed transcription and the identified phonetic transcriptions associated with the textual phrase from the speech recognition library; and responsive to the difference metric exceeding a threshold between the identified phonetic transcriptions and the computed transcription, adding the computed transcription and the textual phrase to a group including the identified phonetic transcriptions and the computed transcription associated with the textual phrase in the audio pronunciation data in the speech recognition library.
7. A non-transitory, machine-readable storage medium, comprising executable instructions that, when executed by a processing system including a processor, facilitate performance of operations, comprising: obtaining video media content, wherein video media content comprises images, audio content, and closed captioning of text from the audio content; obtaining a textual phrase in the closed captioning data as a detected occurrence, wherein the textual phrase is associated with an audio data segment from the audio content of the video media content; computing a phonetic transcription for the detected occurrence as a computed transcription; selecting, from a speech recognition library, identified phonetic transcriptions associated with the textual phrase, wherein the speech recognition library comprises audio pronunciation data for the textual phrase and identified phonetic transcriptions of the textual phrase; calculating a difference metric between the computed transcription and the identified phonetic transcriptions associated with the textual phrase from the speech recognition library; and responsive to the difference metric exceeding a threshold between the identified phonetic transcriptions and the computed transcription, adding the computed transcription and the textual phrase to a group including the identified phonetic transcriptions and the computed transcription associated with the textual phrase in the audio pronunciation data in the speech recognition library. 9. The non-transitory, machine-readable storage medium described in claim 7 , wherein the operations comprise adding the audio data segment to the speech recognition library.