Methods and devices for prediction dependent residual scaling for video coding
US11979575B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2021 |
| Grant date | May 7, 2024 |
| Priority date | — |
| Expiry date | Jun 11, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/50
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods and devices are provided for reducing the decoding latency introduced by LMCS. In one method, one or more luma prediction sample values are selected from an output of a bilinear filter of Decoder-side Motion Vector Derivation (DMVR), the one or more selected luma prediction sample values are adjusted into luma prediction sample values with the same bit depth as an original coding bit depth of an input video, the luma prediction sample values with the same bit depth as the original coding bit depth of the input video are used to derive a scaling factor for decoding one or more chroma residual samples, the scaling factor is used to scale one or more chroma residual samples, and one or more chroma residual samples are reconstructed by adding the one or more scaled chroma residual samples and their corresponding chroma prediction samples.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.