VIDEO ENCODING AND DECODING USING REFERENCE PICTURE

PROBLEM TO BE SOLVED: To encode and decode a video using reference pictures.SOLUTION: In picture encoding, a list of references pictures is constructed to be used in decoding. Prediction modes are defined by n-tuples (x,x,..,x), where xspecifies prediction option of the m-th component of the motion vector field, m=0,..., M-1; where M components to the motion fields exist; where a coding option xis an element from a set composed of all the defined combinations of motion prediction modes and reference picture indices, with the addition of an option "/"x[epsilon]{"/", 0, 1,..., r-1}; where option "/" specifies that the component is not used, and other options 0, 1,..., r-1 specify one of rcombinations. A subset of all possible n-tuples is provided and a prediction mode used for predicting an inter-coded block is defined by reference to the subset.