Regions of interest for quality adjustments
First Claim
1. A method comprising:
- identifying plural regions of interest for a picture, wherein the plural regions of interest comprise a first region of interest that overlaps at least in part with a second region of interest, wherein the first region of interest has first region-of-interest quantization step size information, and wherein the second region of interest has second region-of-interest quantization step size information;
determining an overlap quantization setting for a portion of the picture that corresponds to the overlap, wherein the determining comprises choosing between the first region-of-interest quantization step size information and the second region-of-interest quantization step size information;
adjusting quantization in the portion of the picture that corresponds to the overlap, wherein the adjusting is based at least in part on the overlap quantization setting; and
encoding the picture using the adjusted quantization.
1 Assignment
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Accused Products
Abstract
Quality settings established by an encoder are adjusted based on information associated with regions of interest (“ROIs”). For example, quantization step sizes can be reduced (to improve quality) or increased (to reduce bit rate). ROIs can be identified and quality settings can be adjusted based on input received from a user interface. An overlap setting can be determined for a portion of a picture that corresponds to an ROI overlap area. For example, an overlap setting is chosen from step sizes corresponding to a first overlapping ROI and a second overlapping ROI, or from relative reductions in step size corresponding to the first ROI and the second ROI. ROIs can be parameterized by information (e.g., using data structures) that indicates spatial dimensions of the ROIs and quality adjustment information (e.g., dead zone information, step size information, and quantization mode information).
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Citations
20 Claims
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1. A method comprising:
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identifying plural regions of interest for a picture, wherein the plural regions of interest comprise a first region of interest that overlaps at least in part with a second region of interest, wherein the first region of interest has first region-of-interest quantization step size information, and wherein the second region of interest has second region-of-interest quantization step size information; determining an overlap quantization setting for a portion of the picture that corresponds to the overlap, wherein the determining comprises choosing between the first region-of-interest quantization step size information and the second region-of-interest quantization step size information; adjusting quantization in the portion of the picture that corresponds to the overlap, wherein the adjusting is based at least in part on the overlap quantization setting; and encoding the picture using the adjusted quantization. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method comprising:
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identifying overlapping regions of interest in a picture; identifying non-overlapping regions of interest in the picture; calculating a quantization step size for the overlapping regions differently than for non-overlapping regions of interest; adjusting an encoder setting using at least the calculated quantization step size for the overlapping region; and encoding the picture using the encoder after the adjusting. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A computer-readable memory having instructions thereon for performing a method, the method comprising:
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identifying plural regions of interest for a picture, wherein the plural regions of interest comprise a first region of interest that overlaps at least in part with a second region of interest, wherein the first region of interest has first region-of-interest quantization step size information, and wherein the second region of interest has second region-of-interest quantization step size information; determining an overlap quantization setting for a portion of the picture that corresponds to the overlap; and adjusting quantization in the portion of the picture that corresponds to the overlap, wherein the adjusting is based at least in part on the overlap quantization setting. - View Dependent Claims (17, 18, 19, 20)
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Specification