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    • 8. 发明授权
    • Method and apparatus for compressing image signal
    • 用于压缩图像信号的方法和装置
    • US08064711B2
    • 2011-11-22
    • US12243204
    • 2008-10-01
    • Elena AlshinaAlexander AlshinEkaterina NesterovaMaxim KoroteevVadim Seregin
    • Elena AlshinaAlexander AlshinEkaterina NesterovaMaxim KoroteevVadim Seregin
    • G06K9/36
    • H04N19/48H04N19/122H04N19/149H04N19/152H04N19/18H04N19/192H04N19/196H04N19/463H04N19/60
    • A method of compressing image signals, to provide more efficient compression than a discrete cosine transform (DCT) while having the least amount of overhead information is provided. A partial exchange between a row and a column of a transform matrix is performed by applying several values to a parameter, which shows an extent of partial exchange between rows and columns of the transform matrix. When a value of the used angle parameter is stored or transmitted, an overhead increases. Processes generating a random sequence of the angle parameter, generating a compression coefficient matrix regarding each angle parameter of the generated random sequence, and calculating a compression rate are repeated to obtain an angle parameter with the highest compression rate. The angle parameter having the highest compression rate is not stored or transmitted, but a number in the random sequence of the corresponding angle parameter is obtained, and stored or transmitted.
    • 提供了具有最少量的开销信息的压缩图像信号的方法,以提供比离散余弦变换(DCT)更有效的压缩。 通过将几个值应用于参数来执行变换矩阵的行和列之间的部分交换,该参数显示了变换矩阵的行和列之间的部分交换的程度。 当使用角度参数的值被存储或传输时,开销增加。 重复生成角度参数的随机序列的处理,生成关于所生成的随机序列的每个角度参数的压缩系数矩阵以及计算压缩率的处理,得到压缩率最高的角度参数。 没有存储或发送具有最高压缩率的角度参数,而是获得相应角度参数的随机序列中的数字,并存储或发送。