Methods and systems for estimating motion in multimedia pictures

摘要

Several methods and systems for estimating motion in a plurality of multimedia pictures are disclosed. In an embodiment, at least one temporal distance between a multimedia picture and one or more reference pictures corresponding to the multimedia picture in a capture order associated with the plurality of multimedia pictures is computed. The at least one temporal distance is computed subsequent to an encoding of the multimedia picture. At least one motion estimation parameter is determined based on the at least one temporal distance. Motion associated with a subsequent multimedia picture to be encoded is estimated based on the at least one motion estimation parameter.

主权项

1. A method comprising:
computing, with a processor, a temporal distance between a picture in a sequence of video pictures and one or more reference pictures in the sequence of video pictures, the reference pictures being used to perform motion compensation for the picture; determining whether the temporal distance computed for the picture is less than or equal to a minimum temporal distance value, the minimum temporal distance value being less than or equal to temporal distances computed for all previously coded pictures in the sequence of video pictures; selecting, with the processor, the picture as a source picture for obtaining seed predictors to use when performing motion estimation for a subsequent picture in response to determining that the temporal distance is less than or equal to the minimum temporal distance value; selecting, with the processor, a current source picture as the source picture for obtaining the seed predictors to use when performing the motion estimation for the subsequent picture in response to determining that the temporal distance is not less than or equal to the minimum temporal distance value, the current source picture corresponding to a source picture used for obtaining seed predictors for the picture; and performing, with the processor, the motion estimation for the subsequent picture based on the seed predictors obtained from the selected source picture.