Patent · US Active

Inter-layer prediction between layers of different dynamic sample value range

US9712816B2 · kind B2 · utility

4Cited by

2References

26Claims

0Family size

Assignee

Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

Jens-Uwe Garbas · Erlangen, DE
Herbert Thoma · Kenzingen, DE

Key dates

Filing date	May 8, 2014
Grant date	Jul 18, 2017
Priority date	—
Expiry date	Apr 6, 2035

Classification

Technology area (CPC H)Electricity
CPC primaryH04N19/98
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

The ratio between coding quality on the one hand and coding rate on the other hand is increased. To this end, a global predictor and a local predictor are used in combination. The global predictor derives a global tone-mapping function based on a statistical analysis of pairs of values of co-located samples in the first tone-mapped version and the second version of the picture, and applies the global tone-mapping function onto the first tone-mapped version of the picture. The local predictor locally derives a locally varying tone-mapping function based on a statistical analysis of values of co-located samples in the second version of the picture and the globally predicted reference picture in units of sub-portions into which the globally predicted reference picture and the second version of the picture are partitioned, and applies the locally varying tone-mapping function onto the globally predicted reference picture.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.