Obscuring video signals for conditional access
US6771704B1 · kind B1 · utility
40Cited by
9References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 28, 2000 |
| Grant date | Aug 3, 2004 |
| Priority date | — |
| Expiry date | Feb 28, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video data stream is re-encoded using motion vectors from a prior encoding operation. The video data may be enhanced by the system. Information about the enhancement, along with the decoded motion vectors, is sent to encoding circuitry. Information provided to the encoder may be tailored to the type of video data received or to the type of enhancement performed, or based on other criteria. Using the previously derived motion vectors, the encoding circuitry may perform substantially fewer computations than are used to calculate motion vectors from scratch
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.