Patent ID: 7181075
Filing Date: 2007-02-20
Classification: H04N

Abstract:
1. An apparatus for performing multi-level image encoding/decoding, said apparatus comprising: a transform coefficient storage memory for storing transform coefficients which are the result of wavelet transform of a multi-level image; a significance information memory for storing information as to whether or not the transform coefficient is significant; a plus/minus sign memory for storing information as to a sign of the transform coefficient; a processed information memory for storing information as to whether or not bit modeling processing of the transform coefficient is completed; a refinement information memory for storing information as to whether or not processing of an magnitude refinement pass of the transform coefficient is completed; means for executing bit modeling processing on transform coefficients read from said transform coefficient storage memory, by using information obtained on accessing said significance information memory, said plus/minus sign memory, said processed information memory and said refinement information memory; first address generating means for generating an address for accessing said processed information memory and said refinement information memory; and second address generating means for generating an address for accessing said significance information memory and said plus/minus sign memory.