METHOD AND APPARATUS FOR MANAGING AUDIO VISUAL, AUDIO OR VISUAL CONTENT

摘要

To manage audio visual content, a stream of fingerprints is derived in a fingerprint generator and received at a fingerprint processor that is physically separate from the fingerprint generator. Metadata is generated by processing the fingerprints to detect the sustained occurrence of low values of an audio fingerprint to generate metadata indicating silence; comparing the pattern of differences between temporally succeeding values of a fingerprint with expected patterns of film cadence to generate metadata indicating a film cadence; and comparing differences between temporally succeeding values of a fingerprint with a threshold to generate metadata indicating a still image or freeze frame.

主权项

1. A method of managing audio visual, audio or visual content, comprising the steps of:
receiving a stream of fingerprints, derived in a fingerprint generator by an irreversible data reduction process from respective temporal regions within a particular audio visual, audio or visual content stream, at a fingerprint processor that is physically separate from the fingerprint generator via a communication network; and processing said fingerprints in the fingerprint processor to generate metadata which is not directly encoded in the fingerprints, with one or more processes selected from the group consisting of: detecting the sustained occurrence of low values of an audio fingerprint to generate metadata indicating silence; comparing the pattern of differences between temporally succeeding values of a fingerprint with expected patterns of film cadence to generate metadata indicating a film cadence; and comparing differences between temporally succeeding values of a fingerprint with a threshold to generate metadata indicating a still image or freeze frame.