1. A system, comprising: an electronic device of a decoder, the electronic device configured to: receive a first layer bitstream; receive a second enhancement layer bitstream corresponding to the first layer bitstream; wherein the second enhancement layer bitstream is dependent on the first layer bitstream; determine whether a motion vector infer control signal in the second enhancement layer bitstream is equal to a predetermined value; responsive to determining that the motion vector infer control signal in the second enhancement layer bitstream is equal to the predetermined value, decode a current prediction unit of the second enhancement layer bitstream using a motion vector derived from a motion vector of the first layer bitstream; and responsive to determining that the motion vector infer control signal in the second enhancement layer bitstream is not equal to said predetermined value, construct a motion vector predictor list derived from the second enhancement layer bitstream and use the motion vector predictor list for the current prediction unit of the second enhancement layer bitstream.