| 摘要 |
An Internet Protocol television (IPTV) system includes an advertising module adapted to read metadata information associated with an advertising item included within a content item recorded on a set-top box, determine that the advertising item is expired, and send another advertising item to the set-top box to be played on the set-top box in the place of the first advertising item when the content item is played on the set-top box. A method includes determining that an advertising item that is included within a content item that is recorded on a set-top box is expired, deleting the advertising item from the set-top box, recording a second advertising item on the set-top box, and playing the second advertising item in the place of the first advertising item when the content item is played on the set-top box.
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