Patent ID: 7826532

Claim:
A method comprising: decoding, using a generated chrominance motion vector, an encoded motion picture signal composed of a plurality of fields with an inter-field motion compensating prediction to thereby provide a decoded motion picture signal, said decoding including generating the chrominance motion vector from a luminance motion vector according to a calculation method represented by the formula: MVC y =MV y when a reference source field and a reference destination field are both a top field or are both a bottom field, the formula: MVC y =MV y− 2 when the reference source field is the top field and the reference destination field is the bottom field, and the formula: MVC y =MV y +2 when the reference source field is the bottom field and the reference destination field is the top field, wherein MV y implies a vertical component of a luminance motion vector indicating a vertical direction movement of a luminance pixel of a field image with vector component values of the luminance motion vector in units of 4, and MVC y implies a vertical component of a chrominance motion vector indicating a vertical direction movement of a chrominance pixel of the field image with the vector component values of the chrominance motion vector in units of 8.