METHOD AND DEVICE FOR SUBBAND CODING FREQUENCY CONVERSION UNIT, AND METHOD AND DEVICE FOR IMAGE ENCODING/DECODING USING SAME

摘要

One embodiment of the present invention relates to a method and a device for subband coding a frequency conversion unit, and to a method and a device for image encoding/decoding using same. One embodiment of the present invention provides the method and the device for subband coding the frequency conversion unit, and the method and the device for image encoding/decoding using same, comprising the following steps: dividing the frequency conversion unit into at least one frequency domain; generating encoding information for the frequency domain based on the presence of a frequency coefficient which is not 0 in each of the frequency domains; scanning the frequency coefficient of each of the frequency domains and generating a coefficient sequence of the frequency domains; and generating an encoding sequence for encoding and converting the encoding information for the frequency domains and the scanned frequency coefficient sequence of the frequency domain into a binary code.