| 摘要 |
<p>Content identifiers are provided to uniquely identify content, or a subset of content. The content identifiers are used to index corresponding interactive data. The interactive data may be maintained in a central base (106), or may be distributed to routers (104) in various subsets. In one embodiment, a set-top box (102) receives content in an interactive TV system. The content is digitally watermarked to include content identifiers. The set-top box (102) includes a watermark decoder, which detects the watermark identifier. The identifier is used to access information, such as interactive data (108). The interactive data (108) is then used to acces interactive content. In another embodiment, interactive data (108) and/or content are pushed to the set-top box. In addition, the context of the situation can be communicated to improve the interactive experience.</p> |
