Audio search using codec frames
US9595264B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2014 |
| Grant date | Mar 14, 2017 |
| Priority date | — |
| Expiry date | Mar 29, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M3/4936
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
To detect events in an audio stream, frames of an audio signal (e.g., frames generated by a codec for a voice call or music stream) are received. Based on information in the frames, an index is used to look up an entry in a table associated with the codec. Each entry in the table indicates a likelihood that a frame matches a sound model element. The likelihood is used in the search for a sound bite, word, and/or phrase in the audio signal. The process of dynamic programming is used to find the combined likelihood for a match of the word, phrase, and/or sound bite to a region of the audio stream. Upon detection of the word, phrase, and/or sound bite in the audio stream, an event is generated, such as, notifying a person or logging the event in a database.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.