MOTION INFORMATION SIGNALING FOR SCALABLE VIDEO CODING

1 .- 26 . (canceled)

27 . A video encoding method comprising:

generating a video bitstream comprising a plurality of base layer pictures and a plurality of corresponding enhancement layer pictures;

identifying a prediction unit (PU) of one of the enhancement layer pictures;

determining whether the PU uses an inter-layer reference picture of the enhancement layer picture as a reference picture; and

on a condition that the PU uses the inter-layer reference picture as the reference picture,

setting motion vector information associated with the inter-layer reference picture of enhancement layer to a value indicative of zero motion, and

sending the motion vector information, associated with the inter-layer picture reference of the enhancement layer, indicative of zero motion.

28 . The method of claim 27 , wherein the motion vector information associated with the inter-layer reference picture of enhancement layer comprises one or more of a motion vector predictor (MVP), or a motion vector difference (MVD).

29 . The method of claim 27 , wherein the enhancement layer picture is associated with an enhancement layer and the inter-layer reference picture is derived from a collocated base layer picture.

30 . The method of claim 27 , wherein the inter-layer reference picture is associated with a reference picture list of an enhancement layer.

31 . The method of claim 27 , wherein the inter-layer reference picture is stored in a decoded picture buffer (DPB) of enhancement layer.

32 . The method of claim 27 , wherein the motion vector information associated with the inter-layer reference picture of enhancement layer comprises one or more motion vectors, and wherein the motion vectors are associated with the PU.

33 . The method of claim 32 , wherein each of the motion vectors is set to a value 0.

34 . The method of claim 27 , further comprising:

on a condition that the PU uses the inter-layer reference picture as the reference picture, disabling the use of the inter-layer reference picture for bi-prediction of the PU of the enhancement layer picture.

35 . The method of claim 34 , on a condition that the PU uses the inter-layer reference picture as the reference picture, performing motion prediction using uni-prediction.

36 . A video decoding method comprising:

receiving a video bitstream comprising a plurality of base layer pictures and a plurality of enhancement layer pictures; and

on a condition that a prediction unit (PU) of the one of the enhancement layer pictures makes reference to an inter-layer reference picture as a reference picture for motion prediction,

receiving an enhancement layer motion vector information, associated with an inter-layer picture, indicative of zero motion, and

setting the enhancement layer motion vector information associated with the inter-layer reference picture to a value indicative of zero motion.

37 . A video encoding device comprising:

a processor configured to:

generate a video bitstream comprising a plurality of base layer pictures and a plurality of corresponding enhancement layer pictures;

identify a prediction unit (PU) of one of the enhancement layer pictures;

determine whether the PU uses an inter-layer reference picture of the enhancement layer picture as a reference picture; and

on a condition that the PU uses the inter-layer reference picture as the reference picture,

set motion vector information associated with the inter-layer reference picture of enhancement layer to a value indicative of zero motion, and

send the motion vector information, associated with the inter-layer reference picture of the enhancement layer, indicative of zero motion.

38 . The video encoding device of claim 37 , wherein the motion vector information associated with the inter-layer reference picture of enhancement layer comprises one or more of a motion vector predictor (MVP), or a motion vector difference (MVD).

39 . The video encoding device of claim 37 , wherein the enhancement layer picture is associated with an enhancement layer and the inter-layer reference picture is derived from a collocated base layer picture.

40 . The video encoding device of claim 37 , wherein the inter-layer reference picture is associated with a reference picture list of enhancement layer.

41 . The video encoding device of claim 37 , wherein the inter-layer reference picture is stored in a decoded picture buffer (DPB) of enhancement layer.

42 . The video encoding device of claim 37 , wherein the motion vector information associated with the inter-layer reference picture of enhancement layer comprises one or more motion vectors, and wherein the motion vectors are associated with the PU.

43 . The video encoding device of claim 42 , wherein each of the motion vectors is set to a value 0.

44 . The video encoding device of claim 37 , wherein the processor is further configured to:

on a condition that the PU uses the inter-layer reference picture as the reference picture, disable the use of the inter-layer reference picture for bi-prediction of the enhancement layer picture.

45 . The video encoding device of claim 44 , wherein the processor is further configured to:

on a condition that the PU uses the inter-layer reference picture as the reference picture, perform motion prediction using uni-prediction.

46 . A video decoding device comprising:

a processor configured to:

receive a video bitstream comprising a plurality of base layer pictures and a plurality of enhancement layer pictures; and

on a condition that a prediction unit (PU) of the one of the enhancement layer pictures makes reference to an inter-layer reference picture for motion prediction,

receive an enhancement layer motion vector information, associated with the inter-layer reference picture, indicative of zero motion, and

set the enhancement layer motion vector information associated with the inter-layer reference picture to a value indicative of zero motion.