Encoding images using block-based macroblock-level statistics
US5832234A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 1995 |
| Grant date | Nov 3, 1998 |
| Priority date | — |
| Expiry date | Oct 18, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/15
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Block-level statistical measures are generated and then used to generate macroblock-level statistical measures, which are in turn used to determine how to encode the macroblocks of the image. In a preferred embodiment, a macroblock-level intra-SAD measure is generated by summing four block-level intra-SAD measures generated from the four blocks of the macroblock. The macroblock-level intra-SAD measure is then used to determine whether to encode the macroblock using intraframe encoding or interframe encoding. Basing macroblock-level statistics on block-level measures can provide a more accurate prediction as to how the macroblock would be encoded using intraframe encoding techniques.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.