Adaptive filter intra prediction modes in image/video compression
US11979564B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 2022 |
| Grant date | May 7, 2024 |
| Priority date | — |
| Expiry date | Mar 2, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/80
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Generating a prediction block for coding a block includes determining an adaptive intra-prediction mode indicative of at least a training region and a configuration of neighboring pixel locations. The training region neighbors the block and includes a plurality of reconstructed pixels. Filter coefficients are obtained. The filter coefficients are used to obtain respective prediction pixels of neighboring pixels within the training region when applied to defined respective configurations of the neighboring pixels according to the configuration of the neighboring pixels. The filter coefficients minimize a function of differences, each difference being a respective difference between a pixel in the training region and a prediction of that pixel in the training region. The prediction block is generated by recursive extrapolations that use the filter coefficients by predicting each pixel of the prediction block by applying the filter coefficients to the configuration of neighboring pixels for the pixel being predicted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.