System and method for fast motion estimation
US7693219B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 4, 2006 |
| Grant date | Apr 6, 2010 |
| Priority date | — |
| Expiry date | Oct 22, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/567
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A fast motion estimation system that determines a reference macroblock or sub-block combination within a reference frame for a current macroblock in a current frame includes a memory, a reference macroblock search circuit, a sub-block combination search circuit, and a comparator circuit. The reference macroblock search circuit determines a motion vector, multiple difference values, and a cost value for each macroblock within the reference frame according to a fast motion estimation search pattern, and stores the motion vector and the difference values in the memory. The sub-block combination search circuit searches the motion vector and the difference values in the memory for determining a corresponding one of multiple lowest cost sub-block combinations for each of multiple sub-block motion modes. The comparator circuit determines a lowest cost macroblock and selects from among the lowest cost macroblock and the lowest cost sub-block combinations to determine the reference macroblock.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.