Distributed and tiered architecture for content search and content monitoring

摘要

An efficient large scale search system for video and multi-media content using a distributed database and search, and tiered search servers is described. Selected content is stored at the distributed local database and tier1 search server(s). Content matching frequent queries, and frequent unidentified queries are cached at various levels in the search system. Content is classified using feature descriptors and geographical aspects, at feature level and in time segments. Queries not identified at clients and tier1 search server(s) are queried against tier2 or lower search server(s). Search servers use classification and geographical partitioning to reduce search cost. Methods for content tracking and local content searching are executed on clients. The client performs local search, monitoring and/or tracking of the query content with the reference content and local search with a database of reference fingerprints. This shifts the content search workload from central servers to the distributed monitoring clients.

主权项

1. A method for fast updating of a search database, the method comprising:
creating two duplicate databases using an initial set of reference signatures; searching on a first database of the two duplicate databases as the active database; updating a second database of the two duplicate databases as the standby database with new signatures for new content without locks; switching the standby database with the active database to create a new standby database; and updating the new standby database with the new signatures for the new content without locks.