be checked however in the method according to the present invention a lossless dpcm differential pulse code modulation is performed with respect to the low frequency band having much image information while szt coding is performed with respect to the other bands using level similarity also a noise filter to remove a noise included in input image is provided so as to improve compression rate and quality an embodiment of the present invention will be described in details with reference to the accompanying drawings the encoder according to the embodiment of the present invention is shown in fig1 and fig2 the encoder as shown in fig1 is a intra trane encoder which allows a high capacity of data to be transmitted with high quality and high speed the encoder as shown in fig2 is a inter frame encoder which allows a high capacity of data to be transmitted with high quality and high speed even in the network having low transmission rate note that the same drawing number will be used with respect to the same block of fig1 and fig2 as shown in fig1 input moving image data are supplied to an a d converter 1 the moving image data.