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AssigneeMicrosoft Technology Licensing, LLC
InventorGary J. Sullivan
Estimating the term…
Techniques and tools for high accuracy position calculation for picture resizing in applications such as spatially-scalable video coding and decoding are described. In one aspect, resampling of a video picture is performed according to a resampling scale factor. The resampling comprises computation of a sample value at a position i,j in a resampled array. The computation includes computing a derived horizontal or vertical sub-sample position x or y in a manner that involves approximating a value in part by multiplying a 2n value by an inverse (approximate or exact) of the upsampling scale factor. The approximating can be a rounding or some other kind of approximating, such as a ceiling or floor function that approximates to a nearby integer. The sample value is interpolated using a filter.
In a computer system that implements a video encoder or video decoder, a method comprising:
One or more computer-readable media storing computer-executable instructions for causing a processor programmed thereby to perform scalable video coding or scalable video decoding, the one or more computer-readable media being selected from the group consisting of volatile memory, non-volatile memory and magnetic disk, the computer-executable instructions comprising:
A computer system comprising a processor and memory, wherein the computer system implements:
Dependencies are inferred from the claim text.