| 摘要 |
A method and apparatus of communicating audio/video programs (e.g., television content associated with a plurality of channels) includes receiving the audio/video programs over a transport medium. A stream of ancillary data portions associated with a plurality of audio/video programs (e.g., a plurality of television channels or transport stream programs) may be received over a separate delivery mechanism. The ancillary data may include announcements associated with enhancement data according to an Advanced Television Enhancement Forum Specification, for example. One of the audio/video programs is tuned to, with one or more ancillary data portions located and identified with the tuned audio/video program. A special announcement in the ancillary data portions delivered to an expected location is used to locate announcements for the tuned audio/video program.
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