Deblocking filter level decision method
US11245896B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 2021 |
| Grant date | Feb 8, 2022 |
| Priority date | — |
| Expiry date | Feb 26, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/80
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is a deblocking filter level decision method applicable to an image encoder and used for determining deblocking filter levels of N image frames. The method includes: determining whether a current quantization parameter of a current frame of the N image frames is the same as a previous quantization parameter of any previous frame of the N image frames; if the current quantization parameter is different from the previous quantization parameter, looking up M current deblocking filter reference levels in an established table according to the current quantization parameter and then determining M current deblocking filter levels of the current frame according to the M current deblocking filter reference levels, respectively; and if the current quantization parameter is the same as the previous quantization parameter, determining the M current deblocking filter levels of the current frame according to M previous deblocking filter levels of the previous frame, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.