Patent ID: 8724707
Filing Date: 2014-05-13
Classification: H04N

Abstract:
1. A method performed in a video decoder, the method comprising: receiving data defining a region-of-interest (ROI) of a current video frame; receiving a temporal spatial dependency (TSD) value for at least one video block in the ROI, wherein the TSD value comprises a number that indicates how far over a temporal sequence of previously decoded video frames that spatial dependency on candidate reference video blocks propagates for the current video block in the ROI; identifying, based on the TSD value, a portion of a reference frame that includes candidate reference video blocks needed to decode the current video block in the ROI due to temporal propagation of spatial dependencies indicated by the TSD value, wherein the portion of the reference frame is larger than the ROI of the current video frame and smaller than the entire reference frame; and decoding the current video block in the ROI using at least one of the candidate reference video blocks in the portion of the reference frame.