| 摘要 |
The present application discloses a method for providing promotion content. A server provides to a client device media content and a sequence of closed caption (CC) messages that are synchronized with the media content. Two consecutive CC messages are separated by a blank duration that is marked by a blank mark and lasts for a predetermined length of time. The client device is configured to detect the blank mark and generate a request for promotion content that includes at least a user identification for identifying a user of the client device. Upon receiving the promotion content request, the server determines user preferences associated with the user identification, and further identifies a promotion content item according to the user preferences. The promotion content item is provided to the client device for concurrent display with the media content during the blank duration between the corresponding two consecutive CC messages. |
