MOTION PICTURE ENCODING DEVICE AND MOTION PICTURE DECODING DEVICE

摘要

When a prediction is made between fields with different parity, the predicative efficiency of a chrominance vector is improved by adaptively switching the generation of a chrominance motion vector depending on encoding/decoding field parity (top/bottom) and a reference field parity (top/bottom), and the coding efficiency is improved accordingly.

主权项

1. A motion picture encoding method for making an inter-field motion compensation prediction and executing an encoding process on a motion picture signal, wherein each frame has two fields and a number of pixels of a chrominance vertical component is different than a number of pixels of a luminance vertical component, the motion picture encoding method comprising:
generating a chrominance motion vector from a luminance motion vector by using a calculation represented as
MVCy=MVy+2 when a reference field is a top field and a coding field is a bottom field, wherein MVy is the luminance motion vector indicating a vertical direction movement of a luminance pixel of a field image and MVCy is the chrominance motion vector indicating a vertical direction movement of a chrominance pixel of the field image.