Method for video coding a sequence of digitized images
US8121190B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 13, 2007 |
| Grant date | Feb 21, 2012 |
| Priority date | — |
| Expiry date | Dec 21, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention relates to a method for video coding a sequence of digitized images comprising predicting the contents of each image taking into account a rate distortion optimization criterion being dependent on a Lagrange multiplier; transforming the prediction error resulting from predicting step into a plurality of transformed residual coefficients in each image; quantizing the transformed residual coefficients in each image; wherein the Lagrange multiplier is determined for each image based on a probability distribution of the transformed residual coefficients of the respective image, the probability distribution having its maximum probability at its mean zero and being formed such that the probabilities decrease to zero from the mean to large absolute values of the transformed residual coefficients, whereby the variance of the probability distribution is calculated from the plurality of transformed residual coefficients in the respective image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.