Traditional captioning presents the viewer with the caption text one phrase at a time. Even though each caption phrase contains several words, it typically represents just three to five seconds of audio — this means that your caption file typically has a time codes every three to five second. It is this requirement for so many time codes that makes captioning such a tedious and difficult task. Now, imagine producing a time-code for every single word in your media file. Most words have a duration of less than half a second — that is a lot of time codes for your typical media file! If it weren’t for AST, the difficulty of accurately producing time codes at this level of resolution would make word-level synchronization cost-prohibitive. But AST makes word-level synchronization a breeze — AST provides a variety of word-level output types that allow you to experiment with your media and break new ground.
Word-level synchronization allows the content publisher to very closely tie the text presentation to the audio presentation of the media. Content publishers have used this technique for several applications, including:
While only a few industry leaders have content with word-level synchronization, there is still a healthy collection of interesting examples.
Today, AST produces word-level synchronization outputs for the QuickTime player. Several output formats are available, including:
View our list of output formats to see the complete list of available formats. If you do not see what you need, just let us know — we will be happy to work with you to create what you need.