US 11,451,800 B2Granted

Methods and systems for adaptive cropping

AssigneeOP Solutions, LLC

InventorsHari Kalva, Borivoje Furht, Velibor Adzic

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Abstract

An encoder includes circuitry configured to receive a video including a current frame, select a cropped sub-frame of the current frame, signal in a bitstream the cropped sub-frame of the current frame as a function of the initial block segment, wherein the cropped sub-frame is signaled using at least a vertical offset and at least a horizontal offset, the at least a vertical offset includes an sps_conf_win_top_offset and an sps_conf_win_bottom offset, the at least a horizontal offset includes an sps_conf_win_left_offset and an sps_conf_win_right_offset, and signal in the bitstream a scaling constant associated with the cropped sub-frame.

Claims13

Dependent claims

A decoder configured to:

receive a bit stream, the bitstream including:
a sequence of coded pictures, a sequence parameter set associated with the pictures in the sequence,
a plurality of picture parameter sets, each picture parameter set being associated with at least one individual picture in the sequence and including a plurality of parameters defining a corresponding window, the window parameters changing from one picture parameter set to the next so that the corresponding window changes from one picture to the next;
decode a first picture in the sequence;
store the first picture as a first reference picture;
determine a first scaling factor as a function of at least one of the window defining parameters in the picture parameter set of the first picture;
determine a first predictor using the first picture and the first scaling factor;
decode a second picture in the bitstream using the first predictor and store the second picture as a second reference picture;
determine a second scaling factor different from the first scaling factor as a function of at least one window defining parameter in the picture parameter set of the second picture;
and
determine a second predictor using the second picture and second scaling factor.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/193,712Filed 5 Mar 2021 · continuation
Priority: 8 Nov 2019
Published: US 2021/0144390 A124 Jun 2021
Granted: 20 Sep 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

H04N 19/119
Characterised by the element, parameter or selection affected or controlled by the adaptive coding: adaptive subdivision aspects, e.g. subdivision…
H04N 19/184
Characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the…: the…
H04N 19/103
Characterised by the element, parameter or selection affected or controlled by the adaptive coding: selection of coding mode or of prediction mode
H04N 19/105
Selection of coding mode or of prediction mode: selection of the reference unit for prediction within a chosen coding or prediction mode, e.g.…

Family

Application62/932,597Us provisional application · filed 8 Nov 2019
Application17/091,052Parent of this continuation · filed 6 Nov 2020
US 2021/0195220 A1Pre-grant publication · published 24 Jun 2021
US 11,006,132 B1Parent of this continuation
US 2021/0144390 A1Published application
US 11,451,800 B2This patent

From the US filing history. Foreign family members aren’t listed.

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