Text recognition during video compression
US8064516B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 2005 |
| Grant date | Nov 22, 2011 |
| Priority date | — |
| Expiry date | Jun 21, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for encoding an image of a video stream divided into macroblocks comprising determining a maximum of variance of luma blocks in a macroblock, determining if the maximum of variance exceeds a predetermined threshold, determining if the motion vectors of the macroblock are in correlation with a reference macroblock, determining if the macroblock is not an edge macroblock and setting a first quantization level for the macroblock if it meets these conditions and setting a second quantization level for the macroblock if it does not meet these conditions, where the second quantization level is greater than the first quantization level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.