DYNAMIC BACKLIGHT ADAPTATION WITH REDUCED FLICKER
First Claim
Patent Images
1. A system, comprising one or more integrated circuits, wherein the one or more integrated circuits include:
- an input interface configured to receive video signals associated with a video image;
an extraction circuit electrically coupled to the input interface, the extraction circuit operative to calculate a brightness metric associated with the video image based on the received video signals;
an analysis circuit electrically coupled to the extraction circuit, the analysis circuit configured to analyze the brightness metric to identify a first subset of the video image and a second subset of the video image, wherein the first subset of the video image includes spatially varying visual information in the video image and the second subset of the video image includes the remainder of the video image;
an adjustment circuit electrically coupled to the analysis circuit, the adjustment circuit configured to adjust a brightness of the second subset of the video image, wherein a new brightness of the second subset of the video image provides headroom to attenuate noise associated with displaying the second subset of the video image; and
an output interface electrically coupled to the adjustment circuit, the output interface configured to output modified video signals, andwherein the modified video signals include the new brightness of the second subset of the video image.
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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.
72 Citations
24 Claims
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1. A system, comprising one or more integrated circuits, wherein the one or more integrated circuits include:
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an input interface configured to receive video signals associated with a video image; an extraction circuit electrically coupled to the input interface, the extraction circuit operative to calculate a brightness metric associated with the video image based on the received video signals; an analysis circuit electrically coupled to the extraction circuit, the analysis circuit configured to analyze the brightness metric to identify a first subset of the video image and a second subset of the video image, wherein the first subset of the video image includes spatially varying visual information in the video image and the second subset of the video image includes the remainder of the video image; an adjustment circuit electrically coupled to the analysis circuit, the adjustment circuit configured to adjust a brightness of the second subset of the video image, wherein a new brightness of the second subset of the video image provides headroom to attenuate noise associated with displaying the second subset of the video image; and an output interface electrically coupled to the adjustment circuit, the output interface configured to output modified video signals, and wherein the modified video signals include the new brightness of the second subset of the video image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for adjusting a brightness of a subset of a video image, comprising:
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calculating a brightness metric associated with the video image; identifying a first subset of the video image and a second subset of the video image, wherein the identification of the first and second subsets is based on the brightness metric, and wherein the first subset of the video image includes spatially varying visual information in the video image and the second subset of the video image includes the remainder of the video image; and adjusting a brightness of the second subset of the video image, wherein a new brightness of the second subset of the video image provides headroom to attenuate noise associated with displaying the second subset of the video image. - View Dependent Claims (12, 13, 14)
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15. A computer-program product for use in conjunction with a computer system, the computer-program product comprising a computer-readable storage medium and a computer-program mechanism embedded therein for adjusting a brightness of a subset of a video image, the computer-program mechanism comprising:
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instructions for calculating a brightness metric associated with the video image; instructions for identifying a first subset of the video image and a second subset of the video image, wherein the identification of the first and second subsets is based on the brightness metric, and wherein the first subset of the video image includes spatially varying visual information in the video image and the second subset of the video image includes the remainder of the video image; and instructions for adjusting a brightness of the second subset of the video image, wherein a new brightness of the second subset of the video image provides headroom to attenuate noise associated with displaying the second subset of the video image.
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16. A method for scaling a brightness of a non-picture portion of a video image, comprising:
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receiving a video image, that when displayed, comprises a picture portion and the non-picture portion, the non-picture portion having a first brightness value; and scaling 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.
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17. A computer system to scale a brightness of a non-picture portion of a video image, comprising:
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a processor; memory; a program module, wherein the program module is stored in the memory and configurable to be executed by the processor, the program module including; instructions for receiving a video image, that when displayed, comprises a picture portion and the non-picture portion, the non-picture portion having a first brightness value; and instructions for scaling 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.
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18. A computer system configured to scale a brightness of a non-picture portion of a video image, comprising:
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a processor; a memory; an instruction fetch unit within the processor configured to fetch; instructions for receiving a video image, that when displayed, comprises a picture portion and the non-picture portion, the non-picture portion having a first brightness value; and instructions for scaling 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; and an execution unit within the processor configured to execute the instructions for receiving the video image and the instructions for scaling the non-picture portion.
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19. An integrated circuit, comprising one or more sub-circuits, wherein the one or more sub-circuits are configured to:
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calculate a brightness metric associated with the video image; identify a first subset of the video image and a second subset of the video image, wherein the identification of the first and second subsets is based on the brightness metric, and wherein the first subset of the video image includes spatially varying visual information in the video image and the second subset of the video image includes the remainder of the video image; and adjust a brightness of the second subset of the video image, wherein a new brightness of the second subset of the video image provides headroom to attenuate noise associated with displaying the second subset of the video image.
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20. An integrated circuit, comprising:
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an input interface configured to receive video signals associated with a video image; an extraction circuit electrically coupled to the input interface, the extraction circuit operative to calculate a brightness metric associated with the video image based on the received video signals; an analysis circuit electrically coupled to the first circuit, the analysis circuit configured to analyze the brightness metric to identify a first subset of the video image and a second subset of the video image, wherein the first subset of the video image includes spatially varying visual information in the video image and the second subset of the video image includes the remainder of the video image; an adjustment circuit electrically coupled to the analysis circuit, the adjustment circuit configured to adjust a brightness of the second subset of the video image, wherein a new brightness of the second subset of the video image provides headroom to attenuate noise associated with displaying the second subset of the video image; and an output interface electrically coupled to the adjustment circuit, the output interface configured to output modified video signals, and wherein the modified video signals include the new brightness of the second subset of the video image.
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21. A portable device, comprising:
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a display; a light source configured to output light; an attenuation mechanism configured to modulate the output light incident on the display, wherein the display is configured to display a video image; and one or more integrated circuits, comprising; an input interface configured to receive video signals associated with the video image; an extraction circuit electrically coupled to the input interface, the extraction circuit operative to calculate a brightness metric associated with the video image based on the received video signals; an analysis circuit electrically coupled to the extraction circuit, the analysis circuit configured to analyze the brightness metric to identify a first subset of the video image and a second subset of the video image, wherein the first subset of the video image includes spatially varying visual information in the video image and the second subset of the video image includes the remainder of the video image; an adjustment circuit electrically coupled to the analysis circuit, the adjustment circuit configured to adjust a brightness of the second subset of the video image, wherein a new brightness of the second subset of the video image provides headroom for the attenuation mechanism to attenuate noise associated with displaying the second subset of the video image on the display; and an output interface electrically coupled to the adjustment circuit, the output interface configured to output modified video signals, and wherein the modified video signals include the new brightness of the second subset of the video image. - View Dependent Claims (22, 23, 24)
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Specification