Abstract: Embodiments of a system that includes one or more integrated circuits are described. During operation, the system receives a video image, that when displayed, includes a picture portion and the non-picture portion, where the non-picture portion has a first brightness value. Then, the system scales the non-picture portion to have a second brightness value that is greater than the first brightness value to reduce user-perceived changes in the video image associated with backlighting of a display that displays the video image.

Abstract: Embodiments of a system that includes one or more integrated circuits are described. During operation, the system receives a sequence of video images, and calculates brightness metrics associated with the video images in the sequence of video images. Then, the system determines an intensity setting of a light source, which illuminates a display that is configured to display the sequence of video images, and scales brightness values of a given video image in the sequence of video images based on a given brightness metric associated with the given video image. Next, the system changes the intensity setting and scaling the brightness values when there is a discontinuity in the brightness metrics between two adjacent video images in the sequence of video images.

Abstract: Embodiments of a system that includes one or more integrated circuits are described. During operation, the system calculates a brightness metric associated with a video image. Then, the system identifies a subset of the video image based on the brightness metric, where the subset of the video image includes spatially varying visual information in the video image. Next, the system determines the intensity setting of the light source based on a first portion of the brightness metric associated with the subset of the video image, where the light source is configured to illuminate a display that is configured to display the video image.

Abstract: Embodiments of a system that includes one or more integrated circuits are described. During operation, the system transforms the video image from an initial brightness domain to a linear brightness domain, which includes a range of brightness values corresponding to substantially equidistant adjacent radiant-power values in a displayed video image. In this linear brightness domain, the system may determine an intensity setting of the light source based on at least a portion of the transformed video image, such as the portion of the transformed video image that includes spatially varying visual information in the video image. Moreover, the system may modify the transformed video image so that a product of the intensity setting and a transmittance associated with the modified video image approximately equals a product of a previous intensity setting and a transmittance associated with the video image. For example, the modification may include changing brightness values in the transformed video image.

Abstract: Embodiments of a system that includes one or more integrated circuits are described. During operation, the system receives a sequence of video images, where a given video image in the sequence, when displayed, includes a picture portion and the non-picture portion, and where the picture portion has a histogram of brightness values. Then, the system determines the intensity setting of the light source on an image-by-image basis based on the histogram, where the light source is configured to illuminate a display that is configured to display the sequence of video images. Next, the system selectively filters changes in the intensity setting of the light source, where the selective filtering is based on a magnitude of a given change in the intensity setting from a previous video image to a current video image.

Abstract: Embodiments of a system that includes one or more integrated circuits are described. During operation, the system compensates for gamma correction in a video image to produce a linear relationship between brightness values and an associated brightness of the video image when displayed, where the compensation includes an offset at minimum brightness that is associated with light leakage in a display that is configured to display video images. Then, the system calculates an intensity setting of a light source based on at least a portion of the compensated video image, the light source configured to illuminate the display. Next, the system adjusts the compensated video image so that a product of the intensity setting and a transmittance associated with the adjusted video image approximately equals a product of a previous intensity setting and a transmittance associated with the video image.

Abstract: Embodiments of a system that includes one or more integrated circuits are described. During operation, the system reduces power consumption by changing an intensity setting of a light source, which illuminates a display that is configured to display a video image, and scales brightness values for the video image based on a brightness metric associated with the video image. Then, the system calculates the error metric for the video image based on the scaled brightness values and the video image.

Abstract: Embodiments of a system that includes one or more integrated circuits are described. During operation, the system receives a video image, that when displayed, includes a picture portion, a non-picture portion, and a subtitle which is superimposed on at least a subset of the non-picture portion, where the non-picture portion has an initial brightness value. Then, the system scales the brightness of pixels corresponding to a remainder of the non-picture portion of the video image to have a new brightness value that is greater than the initial brightness value to reduce user-perceived changes in the video image associated with backlighting of a display that displays the video image, where the remainder of the non-picture portion excludes the subset of the non-picture portion.

Abstract: Embodiments of a system that includes one or more integrated circuits are described. During operation, the system receives a sequence of video images, which include a video image, and predicts an increase in an intensity setting of a light source (which is configured to illuminate a display) when the video image is to be displayed based on the color saturation. Then, the system selectively adjusts pixels in the video image associated with a white color filter based on a color saturation of at least a portion of the video image, where the display configured to display the video image includes pixels associated with one or more additional color filters and pixels associated with the white color filter. Next, the system incrementally applies the increase in the intensity setting across at least a subset of the sequence of video images.

Abstract: Embodiments of a system that includes one or more integrated circuits are described. During operation, the system receives a video image. Then, the system jointly modifies brightness values of pixels in at least a portion of the video image and an intensity setting of a light source to maintain light output from a display while reducing power consumption by the light source, where the light source is configured to illuminate the display that is configured to display video images. Next, the system adjusts color content in the video image to correct for a dependence of a spectrum of the light source on the intensity setting.