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Chroma subsampling for HDR video with improved subjective quality

: Thoma, Herbert; Frutos-Lopez, Manuel de; Auer, Johannes


Institute of Electrical and Electronics Engineers -IEEE-:
Picture Coding Symposium, PCS 2013. Proceedings : 8-11 December 2013, San Jose, California
Piscataway, NJ: IEEE, 2013
ISBN: 978-1-4799-0292-7 (Print)
ISBN: 978-1-4799-0294-1
Picture Coding Symposium (PCS) <30, 2013, San Jose/Calif.>
Fraunhofer IIS ()

Many proposed high dynamic range (HDR) video coding schemes employ a float to integer transform with a subsequent standard low dynamic range (LDR) video codec. Standard LDR video codecs often work with subsampled chrominance components, usually 4:2:0. In this work we subjectively evaluate float to integer transforms and chroma subsampling for HDR video coding. An adaptive logLuv transform with 12 bit luma component and 8 bit chroma components proves adequate for HDR video coding. A novel chroma subsampling technique is proposed to avoid color bleeding artifacts while preserving the saturation. Subjective tests show improved performance over other known subsampling techniques.