ENCODING DEVICE AND METHOD, DECODING DEVICE AND METHOD, AND TRANSMISSION SYSTEM

摘要

An encoding device and method, a decoding device and method, and a transmission system for enabling the receiving side to output image data which is compression-encoded and transmitted in a short time as a decoded image. To perform wavelet conversion, a filtering processing of each line is performed in units of lines from which one line of coefficient data in the lowest band component is created. The first to seventh lines are subjected to the first filtering processing. At a resolution level=1, coefficient C1, coefficient C2, and coefficient C3 of the high-band component, and coefficient Ca, coefficient Cb, and coefficient Cc of the low-band component are created. At a resolution level=2, coefficient C4 of the high-band component and coefficient C5 of the low-band component are created from coefficient Ca, coefficient Cb, and coefficient Cc. These coefficients are rearranged from the low band to the high band and supplied to a combining filter. The combining filter performs filtering processing of the coefficients in order of supply to create and output image data.