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US08489774B2 Synchronized delivery of interactive content 失效
交互式内容的同步传递

Synchronized delivery of interactive content
Abstract:
Where multiple client devices are synchronized to multiple, asynchronous instances of a time-based media presentation such as live and time-shifted views of a television broadcast, interactive content can be delivered to each one of the various devices at a particular time (or “time offset”) within the presentation independent of when each instance of the time-based media presentation is viewed.
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