Dynamic range converter with reconfigurable architecture and methods for use therewith

摘要

In various embodiments, a dynamic range converter includes a plurality of circuits, including at least one configurable circuit that operates based on configuration data. The plurality of circuits include a first color space converter to convert a source color space of a source video having a source dynamic range to nonlinear color space signals. A linearizer configured converts the nonlinear color space signals to linearized color space signals having a mastering dynamic range via a piecewise linear interpolation of a transfer function. A color volume transformer applies dynamic color transform metadata associated with the source video to generate master adjusted color space signals from the linearized color space signals. A delinearizer converts the master adjusted color space signals to nonlinearized color space signals via a piecewise linear interpolation of an inverse transfer function in accordance with a display dynamic range. A second color space converter converts the nonlinearized color space signals to display domain signals. Other embodiments are disclosed.

主权项

1. A dynamic range converter comprising:
a plurality of circuits, including at least one configurable circuit including a processor and a memory that operates based on configuration data, wherein the plurality of circuits include:
a first color space converter configured to convert a source color space of a source video having a source dynamic range to nonlinear color space signals;a linearizer configured to convert the nonlinear color space signals to linearized color space signals having a mastering dynamic range via a piecewise linear interpolation of a transfer function;a color volume transformer configured to apply dynamic color transform metadata associated with the source video to generate master adjusted color space signals from the linearized color space signals;a delinearizer configured to convert the master adjusted color space signals to nonlinearized color space signals via a piecewise linear interpolation of an inverse transfer function in accordance with a display dynamic range; anda second color space converter configured to convert the nonlinearized color space signals to display domain signals;wherein the color volume transformer applies gamut shaping, luminance tone mapping, chrominance tone mapping and additional color space conversion and wherein the color volume transformer includes:
a third color space converter configured to that apply the gamut shaping to the linearized color space signals in accordance with the dynamic color transform metadata to generate gamut shaped components;a first tone mapper configured to apply first tone mapping by scaling the gamut shaped components in accordance with the dynamic color transform metadata to generate first mapped components;a fourth color space converter configured to color converts the first mapped components in accordance with the dynamic color transform metadata to generate color remapped components;a second tone mapper configured to apply second tone mapping by scaling the color remapped components in accordance with the dynamic color transform metadata to generate second mapped components; anda fifth color space converter configured to color converts the second mapped components in accordance with the dynamic color transform metadata to generate the master adjusted color space signals.