Apparatus and method for creating an alternate reference frame for video compression using maximal differences
US8638854B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 2011 |
| Grant date | Jan 28, 2014 |
| Priority date | — |
| Expiry date | Apr 2, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/80
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Apparatuses and methods for compressing a video signal having at least one frame with at least one block of pixel data are disclosed. A target block is selected, and an alternate reference block that is a predictor for blocks of a sequence of frames is compared to a predictor block to determine whether to create a second alternate reference block as a predictor. When a difference between the alternate reference block and the predictor block is less than a threshold, certain blocks from the sequence of frames that are more different from the first alternate reference block than other non-selected blocks are selected, and the second alternate reference block is created using the selected blocks. In this way, a predictor block that is different from a golden frame predictor is made available when an existing alternate reference block is too similar to the golden frame predictor to be useful.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.