Scalable MPEG-2 video decoder with selective motion compensation
US6680973B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2001 |
| Grant date | Jan 20, 2004 |
| Priority date | — |
| Expiry date | Jun 13, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A decoder system having a motion compensation system that scales the processing of B pictures in order to save computational resources. The motion compensation system has a first scaling system that includes comparing a motion vector magnitude of each macroblock in a B picture with a predetermined threshold. A system for performing a routine decoding operation for each macroblock in which the motion vector magnitude is greater than the predetermined threshold and a system for copying a corresponding macroblock from a previous picture for each macroblock in which the motion vector magnitude is less than or equal to the predetermined threshold. A second scaling system that includes calculating an average motion vector magnitude for a first B picture and replacing a next contiguous B picture with the first B picture if the average motion vector magnitude is less than or equal to a predetermined threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.