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Encoding and decoding two-dimensional signal using a wavelet transform
Encoding and decoding two-dimensional signal using a wavelet transform
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机译:使用小波变换对二维信号进行编码和解码
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摘要
Encoding and decoding devices and methods are provided. All the components of LH, HL, HH sub-band coefficients of the same hierarchy and the same space coordinate are extracted as a set from a wavelet sub-band space. Furthermore, it is judged whether each component of each coefficient is zero and as 1-bit judgment result, the respective judgment results are combined to obtain multi-bit flag information. Upon encoding, firstly, the Huffman information is subjected to variable-length encoding by the Huffman encoding code. After this, only the coefficient values which are not zero are similarly subjected to the variable-length encoding by the Huffman code or the like and outputted.
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