Block type prediction leveraging block-based pixel activities
US11234004B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 2018 |
| Grant date | Jan 25, 2022 |
| Priority date | — |
| Expiry date | Dec 3, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/149
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Systems, apparatuses, and methods for block type prediction leveraging block-based pixel activities are disclosed. A pre-encoder generates predictions of block types for the blocks of a video frame based on associated pixel activities. For each block, the pre-encoder calculates the difference between the pixel activities of the block of a current frame and the pixel activities of a corresponding block of a previous video frame. If the difference is less than a first threshold, the pre-encoder predicts that the block will be a skip block. If the difference is in between the first threshold and a second threshold, the pre-encoder predicts that the block will be a P-block. Otherwise, if the difference is greater than the second threshold, then the pre-encoder predicts that the block will be an I-block. The pre-encoder uses the predictions to select quantization parameter (QP) ranges for encoding the blocks of the video frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.