Statistical content block matching scheme for pre-processing in encoding and transcoding
US7983341B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 10, 2006 |
| Grant date | Jul 19, 2011 |
| Priority date | — |
| Expiry date | May 21, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/57
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Statistical content block matching for video pre-processing, for example in fast motion estimation, uses a second-order distortion criterion for processing steps such as identifying a best reference image portion for comparison with a current image portion. The second-order distortion criterion is a Lagrange-optimized combination of a mean squared error criterion with an entropy criterion. Then a fast motion estimation search advantageously includes performing a diamond search using the second-order distortion criterion to identify a candidate best reference image portion, and performing a nearest neighbor search starting using said second-order distortion criterion to identify the best reference image portion within a search range limited by an adaptive search range cap. A better motion vector can then be calculated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.