Patent ID: 7961785
Filing Date: 2011-06-14
Classification: H04N

Abstract:
1. A method for encoding data for interlaced video using motion compensated predictive coding, wherein video frames are separated into base layer frames and enhancement layer frames, the method comprising the steps of performing motion estimation for the base layer frames, wherein base layer frames are referenced, resulting in first motion vectors; performing motion estimation for the enhancement layer frames, wherein for a single enhancement layer frame different sets of second motion vectors based on different references are generated, the different references being one or more base layer frames, or one or more enhancement layer frames, or combinations thereof; calculating coding costs for each of the different sets of second motion vectors, the coding costs corresponding or being equal to the number of bits required for encoding the enhancement layer frame; estimating a distortion value for each of the different sets of second motion vectors, the distortion value being based on the difference between the enhancement layer frame and a frame that is predicted based on the current set of second motion vectors and the current reference; selecting the reference and set of second motion vectors that provides the best compromise of low coding costs and low distortion, wherein the best compromise is determined by assigning weighting factors to the coding cost value and the distortion value, adding the two weighted values and selecting the combination with the minimum sum; and transmitting an identifier for the selected reference.