Transformation block optimization method
First Claim
1. In a method of encoding in a compressed format video information within a video image frame sequence having first and second video image frames, a method of defining a transformation image frame component having video information in the first video image frame for transformation to the second video image frame, comprising:
- defining the image frame component in the first video image frame and determining a signal-to-noise ratio for the video information within the image frame component;
tentatively subdividing the image frame component into plural image frame subcomponents and determining a signal-to-noise ratio for the video information within the image frame subcomponents; and
adopting the image frame subcomponents as image frame components whenever the signal-to-noise ratio for the image frame subcomponents is greater than the signal-to-noise ratio for the image frame component by more than a predetermined threshold.
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Abstract
A transformation block optimization method provides transformation blocks of variable size for video compression processes. The method includes defining a transformation block of multiple pixels in an image frame and determining a peak signal-to-noise ratio for the transformation block. The transformation block is tentatively subdivided into subcomponents for which a signal-to-noise ratio is also obtained. The subcomponents are adopted as transformation blocks whenever the signal-to-noise ratios of the subcomponents are greater than the signal-to-noise ratio of the transformation block by more than a predetermined threshold.
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Citations
17 Claims
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1. In a method of encoding in a compressed format video information within a video image frame sequence having first and second video image frames, a method of defining a transformation image frame component having video information in the first video image frame for transformation to the second video image frame, comprising:
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defining the image frame component in the first video image frame and determining a signal-to-noise ratio for the video information within the image frame component; tentatively subdividing the image frame component into plural image frame subcomponents and determining a signal-to-noise ratio for the video information within the image frame subcomponents; and adopting the image frame subcomponents as image frame components whenever the signal-to-noise ratio for the image frame subcomponents is greater than the signal-to-noise ratio for the image frame component by more than a predetermined threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of encoding in a compressed format video information within an image frame component of a video image frame, comprising:
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determining an estimated image component corresponding to the image frame component; identifying an estimated error between the estimated image component and the image frame component; determining a signal-to-noise ratio between the video information within the image frame component and the estimated image component; tentatively subdividing the image frame component into plural image frame subcomponents and determining a signal-to-noise ratio for the video information within the image frame subcomponents; and adopting the image frame subcomponents as image frame components whenever the signal-to-noise ratio for the image frame subcomponents is greater than the signal-to-noise ratio of the image frame component by more than a predetermined threshold. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A computer-readable medium storing computer-executable programming for defining a transformation image frame component having video information in a first video image frame for transformation to a second video image frame, the medium comprising:
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programming for defining the image frame component in the first video image frame and determining a signal-to-noise ratio for the video information within the image frame component; programming for tentatively subdividing the image frame component into plural image frame subcomponents and determining a signal-to-noise ratio for the video information within the image frame subcomponents; and programming for adopting the image frame subcomponents as image frame components whenever the signal-to-noise ratio for the image frame subcomponents is greater than the signal-to-noise ratio of the image frame component by more than a predetermined threshold. - View Dependent Claims (16, 17)
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Specification