Motion compensation coding apparatus using wavelet transformation and method thereof

A motion compensation coding method, comprising:

• wavelet-transforming inputted images;
• storing the wavelet-transformed images;
• extracting a motion vector in a direction of a boundary component which represents the directions in an original image;
• zero-tree-coding the stored wavelet-transformed images and the extracted motion vector;
• and
• entropy-coding in a form for transferring the zero-tree-coded image.

A motion compensation coding apparatus, comprising:

• a wavelet transformation unit for receiving a video signal and wavelet transforming by regions of different frequency bands based on a hierarchical structure;
• a frame buffer for storing the wavelet-transformed image outputted from the wavelet transformation unit;
• a motion estimator for comparing the images outputted from the frame buffer, estimating a certain change or motion region in the images and outputting the motion vector corresponding to the motion region, wherein the motion estimator compares the images stored in the frame buffer and extracts a motion vector in a direction of the boundary component which represents each direction in an original image;
• and
• a zero tree coder for receiving the motion vector outputted from the motion estimator and the wavelet-transformed images outputted from the wavelet transformation unit and performing a zero-tree-coding operation thereon.