Methods and apparatus to distinguish a signal originating from a local device from a broadcast signal
US7643090B2 · kind B2 · utility
39Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2004 |
| Grant date | Jan 5, 2010 |
| Priority date | — |
| Expiry date | Dec 10, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/44008
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus to distinguish a signal originating from a local device from a broadcast signal are disclosed. A disclosed system classifies a video component of an audio-video signal by analyzing a histogram of pixel data, analyzing a quality factor, and/or attempting to detect embedded data in the video component. The disclosed system also classifies an audio component of the audio-video signal by attempting to detect embedded audio data and/or analyzing waveform energy associated with the audio component. A source of the audio-video signal is determined based on the video classification and/or the audio classification.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.