The overall architecture and details of a scalable video fingerprinting and identification system that is robust with respect to many classes of video distortions is described. In this system, a fingerprint for a piece of multimedia content is composed of a number of compact signatures, along with traversal hash signatures and associated metadata. Numerical descriptors are generated for features found in a multimedia clip, signatures are generated from these descriptors, and a reference signature database is constructed from these signatures. Query signatures are also generated for a query multimedia clip. These query signatures are searched against the reference database using a fast similarity search procedure, to produce a candidate list of matching signatures. This candidate list is further analyzed to find the most likely reference matches. Signature correlation is performed between the likely reference matches and the query clip to improve detection accuracy.

Disclosed are various embodiments for synchronizing application state information across devices. More specifically, embodiments of the disclosure are related to facilitating idempotency of application state information. Idempotency is maintained by using a timestamp embedded within application state information and/or by determining that the application state information is associated with an accumulating value.

In one embodiment, a method includes accessing a profile page of a user on an online social network, accessing cached content from a feed, determining the last time the content from the feed was updated, and if the last time the content was update was before a particular time, then updated the profile page of the user to include the cached content, else, accessing the feed and updating the profile page of the user to include updated content.

A method for generating a media recommendation is disclosed. The method comprises receiving information about a user associated with a requesting device, identifying profile information based on the information about the user, receiving a media recommendation request from the requesting device, the media recommendation request comprising seed information comprising information identifying a media item, determining at least one related media item based on at least the information identifying the media item and the profile information, and providing information identifying the at least one related media item to the requesting device.

A method and system for indexing, searching, and retrieving information from timed media files based upon relevance intervals. The method and system for indexing, searching, and retrieving this information is based upon relevance intervals so that a portion of a timed media file is returned, which is selected specifically to be relevant to the given information representations, thereby eliminating the need for a manual determination of the relevance and avoiding missing relevant portions. The timed media includes streaming audio, streaming video, timed HTML, animations such as vector-based graphics, slide shows, other timed media, and combinations thereof.

Arrangements are provided which improve the efficiency of the synchronization process. The same ensure that synchronizations of large quantities of content can be completed with a minimum of delay. One method prioritizes the various tasks that are to be performed prior to synchronization. Another method initiates dependent tasks while parsing a synchronization tasks list. Yet another method allows modification of an in-process synchronization operation to allow new synchronization tasks to be accomplished within the context of the same process, negating the need to restart synchronization.

Events may be identified by storing information in response to activating an event stamp function. As a result of activating the event function, the information collected may immediately be compared to event information in a database. Alternatively, the information collected may later be compared to event information in a database. One or more candidates for the event of interest may be automatically or manually retrieved, and the user may decide whether a candidate event of the one or more candidates correspond to the event of interest.

Events may be identified by storing information in response to activating an event stamp function. As a result of activating the event function, the information collected may immediately be compared to event information in a database. Alternatively, the information collected may later be compared to event information in a database. One or more candidates for the event of interest may be automatically or manually retrieved, and the user may decide whether a candidate event of the one or more candidates correspond to the event of interest.

Events may be identified by storing information in response to activating an event stamp function. As a result of activating the event function, the information collected may immediately be compared to event information in a database. Alternatively, the information collected may later be compared to event information in a database. One or more candidates for the event of interest may be automatically or manually retrieved, and the user may decide whether a candidate event of the one or more candidates correspond to the event of interest.