PURPOSE: To obtain an image with low bit rate and high picture quality by transmitting only a specific area selectively in an encoder and a decoder for moving image data.
CONSTITUTION: This encoder judges whether a sampled image or the whole image(entire image) should be transmitted by a coding area judging device 103. When the entire image is coded and transmitted. it is transmitted by adding a signal representing the transmission of the entire image, and the entire image is stored in frame memory 107. When the sampled image is coded and transmitted, a small area such as a face, etc., is sampled and coded, and it is transmitted by adding a coding area identification signal representing the transmission of the sampled image and sampled image information representing a sampling position in the entire image. The decoder puts together the sampled image on the appropriate position of the entire image by identifying the fact that a received image is the sampled image and the sampling position by detecting the coding area identification signal and the sampled image information.
HONDA TOYOTA
KURODA MASAYOSHI
