Backward compatible and backward compatible method of providing both standard and high dynamic range video

摘要

Video processing techniques and pipelines that support the acquisition, distribution and display of High Dynamic Range Image (HDR) image data to both HDR capable display devices and display devices that do not support HDR image processing. A sensor pipeline (210) may generate standard dynamic range (SDR) data (230A) using audio mapping (226), for example, local sound mapping, from HDR data acquired by a sensor. Information used to generate the SDR data may be provided to a display pipeline (260) as metadata (230B) with the generated SDR data (230B). If a target display does not support HDR image processing, the SDR image data can be rendered directly through the display pipeline. If the target display supports HDR image processing, an inverse mapping technique (276) according to the metadata may be applied to the SDR image data to render HDR image data for display. Information used when performing a color gamut mapping can also be provided in the metadata and used to restore cropped colors for display.