Invention Publication
- Patent Title: TEMPORAL FILTER
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Application No.: US18269873Application Date: 2021-12-10
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Publication No.: US20240314307A1Publication Date: 2024-09-19
- Inventor: Per WENNERSTEN , Christopher HOLLMANN , Jacob STRÖM
- Applicant: Telefonaktiebolaget LM Ericsson (publ)
- Applicant Address: SE Stockholm
- Assignee: Telefonaktiebolaget LM Ericsson (publ)
- Current Assignee: Telefonaktiebolaget LM Ericsson (publ)
- Current Assignee Address: SE Stockholm
- International Application: PCT/SE2021/051232 2021.12.10
- Date entered country: 2023-06-27
- Main IPC: H04N19/117
- IPC: H04N19/117 ; H04N19/105 ; H04N19/172 ; H04N19/80

Abstract:
There is provided a method, performed by a temporal filter. The method comprises obtaining a current picture and a set of one or more neighbor pictures comprising a first neighbor picture, wherein each of the one or more neighbor pictures either precedes or follows the current picture in a picture count order. The method comprises, based on a first block of pixel values of the current picture and a first block of pixel values in the first neighbor picture, determining a first filter weight, W1, for at least a first pixel value in the first block of pixel values of the current picture, wherein the first block of pixel values in the first neighbor picture correspond to the first block of pixel values in the current picture. The method comprises, calculating a first filtered pixel value, Pf1, at least using as inputs to the calculation: W1, P1, and Pr1, where PI is the first pixel value from the first block of pixel values of the current picture, and Pr1 is a pixel value from the first neighbor picture that corresponds to the first pixel value.
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