US 10250877

US patent 10250877, titled "Method and device for coding an image block, corresponding decoding method and decoding device," was filed on January 10, 2013, and issued on April 2, 2019. The current assignee is InterDigital Madison Patent Holdings SAS. The inventors are Philippe Bordes, Pierre Andrivon, and Philippe Salmon.

Abstract:
The patent describes a method for reconstructing a current block of an image from a reference block of a reconstructed reference image, where the reference image is of a different size than the current image. The method involves: motion compensating the reference block using an interpolation filter that depends on the sizes of both the reference and current images; decoding a residue block for the current block; and reconstructing the current block from the residue block and the motion-compensated reference block.

Plain-language overview of independent claims:

• Independent Claim 1 (Decoding Method): This claim describes a method for decoding a binary stream to reconstruct a current image block from a reference image block. The key features are that the reference image has been reconstructed at a different size than the current image and is stored in a decoded picture buffer. The method involves motion compensating the reference block using a single horizontal filter (GFH) and a single vertical filter (GFv) applied successively. These single filters are compositions of a motion compensation interpolation filter (MCIF) and a resampling filter (SCF) (e.g., GFv(s) = MCIFv(SCFv(s)) and GFH(u) = MCIFH(SCFH(u))). Crucially, no resampled version of the reconstructed reference image is stored in the decoded picture buffer.

• Independent Claim 4 (Coding Method): This claim outlines a method for coding a current image block from a reference image block, where the reference image is reconstructed at a different size and stored in a decoded picture buffer. Similar to the decoding method, it involves motion compensating the reference block by applying a single horizontal filter (GFH) and a single vertical filter (GFv) successively. These filters are also defined as compositions of a motion compensation interpolation filter (MCIF) and a resampling filter (SCF). The method then calculates a residue block from the current block and the motion-compensated reference block, and codes this residue block into a binary stream. This method also specifies that no resampled version of the reconstructed reference image is stored in the decoded picture buffer.

• Independent Claim 7 (Decoding Device): This claim describes a decoding device equipped with at least one circuit. This circuit is configured to access a reconstructed reference image (at a different size than the current image) from a decoded picture buffer. It motion compensates a reference block from this image using a single horizontal filter (GFH) and a single vertical filter (GFv) successively. The GFv is defined as MCIFv(SCFv(s)) and GFH as MCIFH(SCFH(u)). The device further decodes a residue block from a binary stream and reconstructs the current block using the residue block and the motion-compensated reference block. A key element is that no resampled version of the reconstructed reference image is stored in the decoded picture buffer.

• Independent Claim 8 (Coding Device): This claim details a coding device with at least one circuit. This circuit is designed to access a reconstructed reference image (at a different size than the current image) from a decoded picture buffer. It performs motion compensation on a reference block using a single horizontal filter (GFH) and a single vertical filter (GFv) successively. The GFv is defined as MCIFv(SCFv(s)) and GFH as MCIFH(SCFH(u)). The device then calculates a residue block from the current block and the motion-compensated reference block and codes this residue block into a binary stream. Similar to the methods and decoding device, no resampled version of the reconstructed reference image is stored in the decoded picture buffer.

Regarding CAFC 2026 dockets for patent number 10250877, no direct litigation cases specifically mentioning this patent number were found in the provided search results for the U.S. Court of Appeals for the Federal Circuit for 2026. While the search provided general information on how to search CAFC dockets and a schedule for May 2026, it did not list US10250877. Therefore, there is no authoritative information about specific CAFC litigation for this patent in 2026 based on the provided search results.