Patent Document ID: 9390167
Application ID: 13193514

Base Claim:
1. A method of using a battery powered device to monitor an audio signal and identify audio items within the audio signal, the method including: responsive to the battery powered device having sent initial audio fingerprints extracted from the audio signal, identifying an initial audio item in the initial audio fingerprints; responsive to identifying the initial audio item, updating a cache from a server with one or more audio fingerprint sequences from one or more audio items that are predicted to follow the identified initial audio item, and updating the cache with respective audio item identifiers for the one or more audio items; and matching additional audio fingerprints extracted from the audio signal to the cached audio fingerprint sequences, of the one or more audio items predicted to follow the identified initial audio item, to identify an audio item within the audio signal as one of the one or more audio items.

---

Claim 4:
4. The method of claim 1 , wherein the one or more audio fingerprint sequences from one or more audio items are stored in a local cache on the server.