Compressing and decompressing multiple, layered, video streams employing multi-directional spatial encoding
US8774274B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 11, 2012 |
| Grant date | Jul 8, 2014 |
| Priority date | — |
| Expiry date | Jan 2, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/2365
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A process for compressing and decompressing non-keyframes in sequential sets of contemporaneous video frames making up multiple video streams where the video frames in a set depict substantially the same scene from different viewpoints. Each set of contemporaneous video frames has a plurality frames designated as keyframes with the remaining being non-keyframes. In one embodiment, the non-keyframes are compressed using a multi-directional spatial prediction technique. In another embodiment, the non-keyframes of each set of contemporaneous video frames are compressed using a combined chaining and spatial prediction compression technique. The spatial prediction compression technique employed can be a single direction technique where just one reference frame, and so one chain, is used to predict each non-keyframe, or it can be a multi-directional technique where two or more reference frames, and so chains, are used to predict each non-keyframe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.