IMAGE ENCODING DEVICE, IMAGE ENCODING METHOD, AND IMAGE ENCODING SYSTEM

摘要

An image encoding device with a small encoding delay capable of performing pixel data-by-pixel data encoding by fixed-length data and minimizing the deterioration of the quality of an image generated by the decoding is provided. The image encoding device comprises: a predicted value generating means (16) for predicting target pixel data which is the pixel data of an encoding target pixel to generate predicted value data; a subtractor (11) for calculating the difference value between the target pixel data and the predicted value data to generate difference value data; an encoding mode determining means (12) for determining an encoding mode on the basis of the difference value data and temporarily holding it in a buffer (17); an encoding target determining means (13) for determining which data of the target pixel or the difference value is made encoding target data which is targeted for an encoding processing on the basis of the encoding mode; a quantization means (14) for performing a quantization processing to the encoding target data in the encoding mode to generate quantization data; and a fixed-length code generating means (15) for applying the encoding mode to the quantization data to generate a fixed-length code.