Joint base layer and enhancement layer quantizer adaptation in EDR video coding
US9219916B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 2013 |
| Grant date | Dec 22, 2015 |
| Priority date | — |
| Expiry date | Sep 4, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2370/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An encoder receives one or more input pictures of enhanced dynamic range (EDR) to be encoded in a coded bit stream comprising a base layer and one or more enhancement layer. The encoder comprises a base layer quantizer (BLQ) and an enhancement layer quantizer (ELQ) and selects parameters of the BLQ and the ELQ by a joint BLQ-ELQ adaptation method which given a plurality of candidate sets of parameters for the BLQ, for each candidate set, computes a joint BLQ-ELQ distortion value based on a BLQ distortion function, an ELQ distortion function, and at least in part on the number of input pixels to be quantized by the ELQ. The encoder selects as the output BLQ parameter set the candidate set for which the computed joint BLQ-ELQ distortion value is the smallest. Example ELQ, BLQ, and joint BLQ-ELQ distortion functions are provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.