Lossless video data compressor with very high data rate
US9525880B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 2015 |
| Grant date | Dec 20, 2016 |
| Priority date | — |
| Expiry date | Mar 2, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/91
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Lossless video data compression is performed in real time at the data rate of incoming real time video data in a process employing a minimum number of computational steps for each video pixel. Each pixel 8-bit byte is converted to a difference byte representing the difference between the pixel and its immediate predecessor in a serialized stream of the pixel bytes. This reduces the dynamic range of the data. Any carry bits generated in the subtraction process of two's complement arithmetic are discarded. This reduces the data by a factor of two. Finally, the 8-bit difference pixel bytes thus produced are subject to a maximum entropy encoding process. Such a maximum entropy encoding process may be referred to as a minimum length encoding process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.