Transmitter and receiver for separating a digital video signal into a background plane and a plurality of motion planes

An apparatus for coding digital video data having a plurality of frames, each frame divisible into superimpositioned planes of full screen size, comprising:

• plane data generating means supplied with said plurality of frames of the digital video data for generating said planes for each frame including background plane data representing a still image of the digital video data and n sets of motion plane data, n being an integer, wherein each one of said n sets of motion plane data represents a motion image of the digital video data;
• typical image storing means for storing a plurality of typical image data;
• background plane memory means for storing said background plane data;
• m motion plane memory means, m being an integer greater than or equal to n, wherein each of said n sets of motion plane data is stored in a corresponding one of said m motion plane memory means;
• means for selecting typical image data which resembles most among the typical image data from the background plane data or motion plane data stored in said memory means to obtain discrimination data which corresponds to the selected typical image data and position data which indicates the position of the typical image data;
• change information detecting means for detecting a motion plane change information representative of a difference of the typical image data and the motion plane data of the present frame of said digital video data;
• and
• transmitting means for transmitting the discrimination data, the position data, and the motion plane change information.