Patent ID: 9635371
Date: 2017-04-25
CPC Classifications: H04N

Claim:
1. An apparatus for coding video information, the apparatus comprising: a memory configured to store video data associated with a reference layer picture and an enhancement layer picture; and a processor operationally coupled to the memory and configured to: receive a scale factor that indicates a proportion of scaling between the reference layer picture and the enhancement layer picture in a first direction; determine, based at least in part on the scale factor, a rounding offset value for determining a coordinate in the first direction of a first sample in the reference layer picture based at least in part on a coordinate in the first direction of a second sample in the enhancement layer picture that corresponds to the first sample, the rounding offset value further determined in an operation without a division operator, wherein the rounding offset value is further determined as a sum that is bit-shifted by an integer value, the sum determined based on a summation of (i) a product of the scale factor and a phase and (ii) a first offset value; determine the coordinate in the first direction of the first sample using the scale factor and the rounding offset value; and encode or decode the enhancement layer picture based on the first sample at the determined coordinate.