Residual selection in HDR video compression

Ines Bouzidi (1) , Azza Ouled-Zaïd (1) , Mohamed-Chaker Larabi (2, 3)

1 ENIT - Ecole Nationale d'Ingénieurs de Tunis
2 UP - Université de Poitiers = University of Poitiers
3 XLIM-ASALI - Synthèse et analyse d'images

High Dynamic Range (HDR) videos are commonly compressed using existing Low Dynamic Range (LDR) coding standards. This necessarily implies a Tone Mapping (TM) stage which aims at reducing the input video range while preserving the most significant scene details. In most cases, a residual sequence is encoded and used in the decoder side to recover the HDR content. The challenge is thus to efficiently encode both LDR sequences (TM and residual) without compromising the quality of the reconstructed video. The choice of the residual sequence can have a deep impact on the HDR video coder performances. In this work, we analyze the residual streams in terms of entropy and we discuss HDR video coding performances based on different residuals. Subjective and objective assessments show that differential residual presents much higher efficiency than ratio residuals in terms of bandwidth saving and HDR reconstruction quality.

Domaines: Traitement du signal et de l'image [eess.SP]

Ines Bouzidi, Azza Ouled-Zaïd, Mohamed-Chaker Larabi. Residual selection in HDR video compression . 6th European Workshop on Visual Information Processing (EUVIP), Oct 2016, Marseille, France. ⟨hal-01405756⟩