Motion estimation or motion compensation

Full Title

Methods or arrangements for coding, decoding, compressing or decompressing digital video signals > using predictive coding > involving temporal prediction > Motion estimation or motion compensation

Classification Context

Section:

ELECTRICITY

Class:

ELECTRIC COMMUNICATION TECHNIQUE

Subclass:

PICTORIAL COMMUNICATION, e.g. TELEVISION

Scope Notes

Glossary: motion vector motion vectors a two-dimensional [2D] vector used for inter prediction that provides an offset from the coordinates in the decoded picture to the coordinates in a reference picture global motion estimation process to estimate the part of motion in a video sequence caused by camera motion, e.g. background motion by panning or zooming multiresolution motion estimation multi-resolution motion estimation motion estimation performed on the same picture of a video sequence at different spatial sampling resolutions (coarse-to-fine: starting from the lowest resolution; fine-to-coarse: starting from the highest resolution) block-based matching motion estimation classic motion estimation based on the search of a best matching block in a reference frame occlusion occlusions a part of background or of a foreground object that is hidden in one frame and then uncovered in a following frame. (motion) search window search window a region in a reference frame, where the search for the block or feature best matching the current block or feature is performed

Child Classifications

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• H04N 19/513 Processing of motion vectors
• H04N 19/523 with sub-pixel accuracy
• H04N 19/527 Global motion vector estimation
• H04N 19/53 Multi-resolution motion estimation; Hierarchical motion estimation
• H04N 19/533 Motion estimation using multistep search, e.g. two-dimensional [2D]-log search or one-at-a-time search [OTS]
• H04N 19/537 Motion estimation other than block-based
• H04N 19/547 Motion estimation performed in a transform domain
• H04N 19/55 Motion estimation with spatial constraints, e.g. at image or region borders
• H04N 19/553 Motion estimation dealing with occlusions
• H04N 19/557 Motion estimation characterised by stopping computation or iteration based on certain criteria, e.g. error magnitude being too large or early exit
• H04N 19/56 Motion estimation with initialisation of the vector search, e.g. estimating a good candidate to initiate a search
• H04N 19/563 Motion estimation with padding, i.e. with filling of non-object values in an arbitrarily shaped picture block or region for estimation purposes
• H04N 19/567 Motion estimation based on rate distortion criteria
• H04N 19/57 Motion estimation characterised by a search window with variable size or shape
• H04N 19/573 Motion compensation with multiple frame prediction using two or more reference frames in a given prediction direction
• H04N 19/577 Motion compensation with bidirectional frame interpolation, i.e. using B-pictures
• H04N 19/58 Motion compensation with long-term prediction, i.e. the reference frame for a current frame not being the temporally closest one
• H04N 19/583 Motion compensation with overlapping blocks