Video compression techniques for high dynamic range data

A method of coding high dynamic range (HDR) data, comprising;

• converting the HDR data to a domain of perceptually uniform luminance data;
• coding the converted data by motion compensated predictive coding;
• and
• coding the HDR data by motion compensated predictive coding, wherein a coding parameter of the HDR data coding is based on a parameter converted from a counterpart coding parameter of the coding of the converted data to an HDR space, and
• outputting the coded video data representing the HDR data.

A non-transitory computer readable medium storing program instructions that, when executed by a processing device, cause the device to:

• convert the HDR data to a domain of perceptually uniform luminance data;
• code the converted data by motion compensated predictive coding;
• and
• code the HDR data by motion compensated predictive coding, wherein a coding parameter of the HDR data coding is based on a parameter converted from a counterpart coding parameter of the coding of the converted data to an HDR space, and
• output the coded video data representing the HDR data.

A video coding system comprising:

• a source of high dynamic range (HDR) data;
• a predictive coder, having an input coupled to the source of HDR data and comprising:
• a pixel block coder having an input for pixel blocks of the HDR data;
• a pixel block decoder having an input for coded pixel blocks of the HDR data output by the pixel block coder;
• an in loop filter, having an input for frames of decoded pixel blocks output by the pixel block decoder;
• a reference picture store for storage of frames output by the in loop filter;
• a predictor, having an input coupled to the reference picture store and an output coupled to the pixel block coder;
• and
• a distortion estimator;
• and
• a transmitter, coupled to an output of the second predictive coder, for outputting coded video data representing the HDR data;
• wherein, the pixel block coder, pixel block decoder, in loop filter, reference picture store and predictor operate in a domain of the HDR data, and the distortion estimator operates in a domain of uniform luminance data.