METHODS AND SYSTEMS OF VIDEO CODING USING REFERENCE REGIONS
A decoder includes circuitry configured to receive a bitstream, identify a first frame, locate a first independent reference region within the first frame, extract the first independent reference region from the first frame, decode a second frame using the first independent reference region as a reference for the second frame.
0 . A decoder, the decoder comprising circuitry configured to:
receive a bitstream including signaling information and a first coded picture, at least a portion of the signaling information being associated with the first coded picture;
detect in the signaling information associated with the first coded picture that an independent sub-picture is present in the first coded picture and a location of the
coded sub-picture in the first coded picture;
extract a coded sub-picture from the first coded picture,
decode the coded sub-picture to form a rectangular reference picture having a first resolution, the reference picture being a long-term reference picture;
determine a predictor in the reference picture using a scaling constant obtained from information in the bitstream; and
use the predictor to decode a subsequent picture having a second resolution.
1 . The decoder of claim 1 , wherein the predictor is formed using an interpolation filter.
2 . The decoder of claim 1 , wherein the predictor is determined using a motion vector candidate list.
3 . The decoder of claim 1 , wherein the first predictor is used to decode a first subsequent picture.
4 . The decoder of claim 4 , further configured to determine a second predictor in the second reference picture using a second scaling constant determined from information in the bitstream.
5 . The decoder of claim 5 , wherein the second predictor is used to decode a second subsequent picture.
6 . The decoder of claim 6 , wherein the first and second subsequent pictures are sub-pictures extracted from the same picture.