Methods and systems for adaptive cropping
AssigneeOP Solultions, LLC
InventorsHari Kalva, Borivoje Furht, Velibor Adzic
Life of this patent
Estimating the term…
Abstract
A video decoder is configured to receive a bitstream including a first coded picture having a first resolution and a second coded picture having a second resolution, wherein the first coded picture is an intra-coded picture, parameters defining a cropping window. The decoder decodes the first coded picture and stores the first picture as a reference picture, determines a scaling factor from at least one parameter in the bitstream defining the first cropping window, determines a predictor for the second picture from the reference picture and the scaling factor, decodes the second coded picture using the predictor, and outputs for display the first picture as cropped in accordance with the parameters defining the cropping window.
Claims13
A decoder, the decoder comprising circuitry configured to:
- receive a bitstream the bitstream including:
- a first coded picture, wherein the first coded picture including at least one intra-predicted block;
- a second coded picture;
- a sequence parameter set associated with both the first and second coded pictures, the sequence parameter set including a first set of parameters defining a first cropping window;
- a first picture parameter set associated with the first picture;
- and
- a second picture parameter set associated with the second picture;
- decode the first coded picture and store the first picture as a reference picture;
- determine a scaling factor from at least one parameter in the sequence parameter set defining the first cropping window;
- determine a predictor for the second picture from the reference picture and the scaling factor;
- decode the second coded picture using the predictor;
- and
- output for display the first picture as cropped in accordance with the first set of parameters defining the first cropping window in the sequence parameter set.
A decoder configured to:
- receive a bitstream, the bitstream including:
- a first coded picture having a first resolution and a second coded picture having a second resolution, wherein the first coded picture including at least one intra-predicted block;
- a sequence parameter set associated with both the first and second coded pictures, the sequence parameter set including a first set of parameters defining a first cropping window;
- a first picture parameter set associated with the first picture;
- and
- a second picture parameter set associated with the second picture;
- decode the first coded picture and store the first picture as a reference picture;
- determine a scaling factor from at least one parameter in the sequence parameter set defining the first cropping window;
- determine a predictor for the second picture from the reference picture and the scaling factor;
- decode the second coded picture using the predictor;
- and
- output for display the first picture as cropped in accordance with the first set of parameters defining the first cropping window in the sequence parameter set.
Dependencies are inferred from the claim text.