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摘要

An image coding device for coding image data, provides motion inter-frame compensation predicting unit (29) for predictively coding an image signal at each frame based on an inputted image signal and a stored image signal and outputting a predictive error signal, orthogonal transformation unit (23) for orthogonally transforming said predictive error signal, and quantizing unit for quantizing a transforming coefficient formed by said orthogonal transformation. The image coding device further provides image area detector (30) for detecting a specified image area from the image represented by said image signal and error quantizing unit (32) for deriving a quantizing error of said specified area. The quantizing error derived by said unit (32) is re-quantized in error quantizing unit (32) under control of an error coding control unit (31). The data quantized by the quantizing unit and the error quantizing unit are configured in a coding format through a multiplexer and output externally. <IMAGE>