An image thumbnail caching system combines image thumbnails into one or more sets of video frames. The system then encodes the one or more sets of video frames to generate corresponding encoded video bitstreams. Then, the system stores the encoded video bitstreams. The system sends metadata associated with the encoded video bitstreams. Further, a specific thumbnail can be retrieved, for preview at a device, by decoding one or more of the encoded video bitstreams based on the metadata.
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Lewis, Andrew, "CACHING IMAGE THUMBNAILS AS COMPRESSED VIDEO BITSTREAMS", Technical Disclosure Commons, (April 28, 2015)