Method and apparatus for encoding and decoding video signals by using storage and retrieval of motion vectors
US6519287B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 13, 1998 |
| Grant date | Feb 11, 2003 |
| Priority date | — |
| Expiry date | Jul 13, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system (10) which encodes and decodes video signals in accordance with a compression standard, such as H.263, efficiently stores and retrieves motion vectors associated with the signals. An encoder (16) and a decoder (22) each use a motion vector storage and retrieval circuit (38, 72) which addresses a respective SRAM array (52, 52′). Advanced Prediction Mode for a video signal is implemented by storing only a minimum number of motion vectors by eliminating storage of motion vectors which are not needed for a real-time current calculation. Storage of selected top motion vectors associated with predetermined macroblocks of video information is avoided to gain a memory savings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.