method and device for encoding an hdr video together with an ldr video, method and device for rebuilding one of an hdr video and an ldr video encoded together with non-temporary storage media

摘要

Summary "method and device for encoding an hdr video together with an ldr video, method and device for rebuilding one of an hdr video and an ldr video encoded together with non-temporary storage medium" the inventors realized that representing hdr content using the ldr content the hdr residue is not hassle free. instead, the invention therefore proposes to represent the hdr content using the ldr content, the ldr residue and the global illumination data. that is, a method for encoding a high dynamic range hdr video along with an ldr video is proposed, the ldr video providing a lower dynamic range representation of the hdr video content, the method comprising using processing means to encode a video ldr video and an additional ldr video extracted from hdr video independent of the other ldr video and hdr video and predictively encode the other video using the chosen video as reference, and lossless encoding global illumination data further extracted from the hdr video . This has the advantage that the prediction is more stable and globally ideal predictors are more easily found.