Method of decomposing and composing multimedia data based on discrete wavelet transformation and system for decomposing and composing the same

摘要

PURPOSE: A method and a system for the decomposition and reconstruction of multimedia data based on wavelet are provided to obtain optimum compression efficiency for respective image and text parts when compressing animation under mobile environment. CONSTITUTION: A method for the decomposition and reconstruction of multimedia data based on wavelet includes the steps of receiving first multimedia data including image data and text data(S10), and separating the image and text data from the first multimedia data(S20). Image frames corresponding to the image data are decomposed into a plurality of levels in first and second directions. For each level, binary data values of the image data are shift-operated to correspond to binary coefficients of a wavelet filter, carrying out wavelet transform to generate compressed image data(S30). The separated text data is coded by markup language for mobile contents, generating second text data(S50). Original image data are reconstructed by inverse wavelet transform using an inverse wavelet filter(S40). The coded text is decoded to be reconstructed(S60). The reconstructed images and text are overlapped to display original animation(S70).